Select a year and/or affiliation to see the peer-reviewed publications involving authors from CESM. The publications span data assimilation, machine learning, visualization, data analysis, model development, research computing operations, and data management services. You can view the full publications and search for specific publications in OpenSky, the open access repository of scholarly works developed and managed by the NSF NCAR Library.

Clear filters

Publications (Showing 100 of 127 total )

WRF-ELM v1.0: A regional climate model to study land-atmosphere interactions over heterogeneous land use regions

Huang, H., Qian, Y., Bisht, G., Wang, J., Chakraborty, T., et al. (2025). WRF-ELM v1.0: A regional climate model to study land-atmosphere interactions over heterogeneous land use regions. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-18-1427-2025

The Energy Exascale Earth System Model (E3SM) Land Model (ELM) is a state-of-the-art land surface model that simulates the intricate interactions between the terrestrial land surface and other components of the Earth system. Originating fro...

Publication Genre: Article

View on OpenSky

Integrating the interconnections between groundwater and land surface processes through the coupled NASA land information system and ParFlow environment

Maina, F. Z., Rosen, D., Abbaszadeh, P., Yang, C., Kumar, S. V., et al. (2025). Integrating the interconnections between groundwater and land surface processes through the coupled NASA land information system and ParFlow environment. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2024MS004415

Understanding the interactions between the atmosphere, the land, and the subsurface is fundamental to hydrology and is critical for a better assessment of the impacts of climate change and human management on hydrological systems. However, ...

Publication Genre: Article

View on OpenSky

Report on the 2023 Workshop on Correctness and Reproducibility for Climate and Weather Software

Altuntas, A., Baker, A., Carpenter, I., Dobbins, B., Duda, M. G., et al. (2024). Report on the 2023 Workshop on Correctness and Reproducibility for Climate and Weather Software. , doi:https://doi.org/10.5065/0534-mc88

A workshop on "Correctness and Reproducibility for Climate and Weather Software" was held on November 9-10, 2023, at the National Center for Atmospheric Research in Boulder, CO. This collaborative event brought together the NCAR application...

Publication Genre: Technical Report

View on OpenSky

NCAR-NOAA Community Modeling Infrastructure Meeting Report

Fossell, K. R., Mullendore, G., Koch, D., Bernardet, L., Vogt, J., et al. (2024). NCAR-NOAA Community Modeling Infrastructure Meeting Report. , doi:https://doi.org/10.5065/xy65-z053

Leadership from the NCAR and NOAA modeling communities spearheaded an effort to identify collaboration opportunities in effort to advance weather and climate prediction capabilities and to meet the needs of the broader scientific community....

Publication Genre: Technical Report

View on OpenSky

Quantifying sources of subseasonal prediction skill in CESM2

Richter, J. H., Glanville, A. A., King, T., Kumar, S., Yeager, S., et al. (2024). Quantifying sources of subseasonal prediction skill in CESM2. npj Climate and Atmospheric Science, doi:https://doi.org/10.1038/s41612-024-00595-4

Subseasonal prediction fills the gap between weather forecasts and seasonal outlooks. There is evidence that predictability on subseasonal timescales comes from a combination of atmosphere, land, and ocean initial conditions. Predictability...

Publication Genre: Article

View on OpenSky

Observation-based sowing dates and cultivars significantly affect yield and irrigation for some crops in the Community Land Model (CLM5)

Rabin, S., Sacks, W. J., Lombardozzi, D., Xia, L., Robock, A.. (2023). Observation-based sowing dates and cultivars significantly affect yield and irrigation for some crops in the Community Land Model (CLM5). Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-16-7253-2023

Farmers around the world time the planting of their crops to optimize growing season conditions and choose varieties that grow slowly enough to take advantage of the entire growing season while minimizing the risk of late-season kill. As cl...

Publication Genre: Article

View on OpenSky

Persistent ocean anomalies as a response to Northern Hemisphere heating induced by biomass burning variability

Yamaguchi, R., Kim, J., Rodgers, K. B., Stein, K., Timmermann, A., et al. (2023). Persistent ocean anomalies as a response to Northern Hemisphere heating induced by biomass burning variability. Journal of Climate, doi:https://doi.org/10.1175/JCLI-D-23-0090.1

Biomass burning aerosol (BBA) emissions in the Coupled Model Intercomparison Project phase 6 (CMIP6) historical forcing fields have enhanced temporal variability during the years 1997-2014 compared to earlier peri-ods. Recent studies docume...

Publication Genre: Article

View on OpenSky

EarthWorks

Randall, D., Hurrell, J., Dazlich, D., Sun, L., Feder, A., et al. (2023). EarthWorks.

EarthWorks is a five-year university-based project, supported by NSF/CISE, to develop a global convection-permitting coupled model based on the CESM with GPU capability for all components.

Publication Genre: Conference Material

View on OpenSky

Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing

Kim, J., Yamaguchi, R., Rodgers, K. B., Timmermann, A., Lee, S., et al. (2023). Interannual fires as a source for subarctic summer decadal climate variability mediated by permafrost thawing. npj Climate and Atmospheric Science, doi:https://doi.org/10.1038/s41612-023-00415-1

Climate model simulations run under the Coupled Model Intercomparison Project Phase 6 (CMIP6) use an inhomogeneous biomass burning aerosol (BBA) emission dataset, which exhibits pronounced interannual variability from 1997-2014 due to the i...

Publication Genre: Article

View on OpenSky

Dichotomy between freshwater and heat flux effects on oceanic conveyor belt stability and global climate

Hu, A., Meehl, G. A., Abe-Ouchi, A., Han, W., Otto-Bliesner, B., et al. (2023). Dichotomy between freshwater and heat flux effects on oceanic conveyor belt stability and global climate. Communications Earth & Environment, doi:https://doi.org/10.1038/s43247-023-00916-0

The Atlantic meridional overturning circulation is an important global-scale oceanic circulation, and its changes may be responsible for past abrupt climate change events. By using two versions of a coupled climate model, here we show that ...

Publication Genre: Article

View on OpenSky

Reply to: Response to limited surface impacts of the January 2021 sudden stratospheric warming

Davis, N. A., Richter, J. H., Glanville, A. A., Edwards, J., LaJoie, E.. (2023). Reply to: Response to limited surface impacts of the January 2021 sudden stratospheric warming. Nature Communications, doi:https://doi.org/10.1038/s41467-023-38773-2

Publication Genre: Article

View on OpenSky

Importance of ice nucleation and precipitation on climate with the Parameterization of Unified Microphysics Across Scales version 1 (PUMASv1)

Gettelman, A., Morrison, H., Eidhammer, T., Thayer-Calder, K., Sun, J., et al. (2023). Importance of ice nucleation and precipitation on climate with the Parameterization of Unified Microphysics Across Scales version 1 (PUMASv1). Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-16-1735-2023

Cloud microphysics is critical for weather and climate prediction. In this work, we document updates and corrections to the cloud microphysical scheme used in the Community Earth System Model (CESM) and other models. These updates include a...

Publication Genre: Article

View on OpenSky

Enabling efficient execution of a variational data assimilation application

Dennis, J. M., Baker, A., Dobbins, B., Bell, M. M., Sun, J., et al. (2023). Enabling efficient execution of a variational data assimilation application. The International Journal of High Performance Computing Applications, doi:https://doi.org/10.1177/10943420221119801

Remote sensing observational instruments are critical for better understanding and predicting severe weather. Observational data from such instruments, such as Doppler radar data, for example, are often processed for assimilation into numer...

Publication Genre: Article

View on OpenSky

Assessing Responses and Impacts of Solar Climate Intervention on the Earth System with Stratospheric Aerosol Injection (ARISE-SAI): Protocol and initial results from the first simulations

Richter, J. H., Visioni, D., MacMartin, D. G., Bailey, D. A., Rosenbloom, N., et al. (2022). Assessing Responses and Impacts of Solar Climate Intervention on the Earth System with Stratospheric Aerosol Injection (ARISE-SAI): Protocol and initial results from the first simulations. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-15-8221-2022

Solar climate intervention using stratospheric aerosol injection is a proposed method of reducing global mean temperatures to reduce the worst consequences of climate change. A detailed assessment of responses and impacts of such an interve...

Publication Genre: Article

View on OpenSky

Peak refreezing in the Greenland firn layer under future warming scenarios

Noël, B., Lenaerts, J. T. M., Lipscomb, W., Thayer-Calder, K., Broeke, M. R. v. d.. (2022). Peak refreezing in the Greenland firn layer under future warming scenarios. Nature Communications, doi:https://doi.org/10.1038/s41467-022-34524-x

Firn (compressed snow) covers approximately 90% of the Greenland ice sheet (GrIS) and currently retains about half of rain and meltwater through refreezing, reducing runoff and subsequent mass loss. The loss of firn could mark a tipping poi...

Publication Genre: Article

View on OpenSky

Do nudging tendencies depend on the nudging timescale chosen in atmospheric models?

Kruse, C., Bacmeister, J., Zarzycki, C. M., Larson, V. E., Thayer-Calder, K.. (2022). Do nudging tendencies depend on the nudging timescale chosen in atmospheric models?. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2022MS003024

Nudging is a ubiquitous capability of numerical weather and climate models that is widely used in a variety of applications (e.g., crude data assimilation, "intelligent" interpolation between analysis times, constraining flow in tracer adve...

Publication Genre: Article

View on OpenSky

Subseasonal Earth system prediction with CESM2

Richter, J. H., Glanville, A. A., Edwards, J., Kauffman, B. G., Davis, N. A., et al. (2022). Subseasonal Earth system prediction with CESM2. Weather and Forecasting, doi:https://doi.org/10.1175/WAF-D-21-0163.1

Prediction systems to enable Earth system predictability research on the subseasonal time scale have been developed with the Community Earth System Model, version 2 (CESM2) using two configurations that differ in their atmospheric component...

Publication Genre: Article

View on OpenSky

Less surface sea ice melt in the CESM2 improves Arctic Sea ice simulation with minimal non-polar climate impacts

Kay, J. E., DeRepentigny, P., Holland, M. M., Bailey, D. A., DuVivier, A. K., et al. (2022). Less surface sea ice melt in the CESM2 improves Arctic Sea ice simulation with minimal non-polar climate impacts. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2021MS002679

This study isolates the influence of sea ice mean state on pre-industrial climate and transient 1850-2100 climate change within a fully coupled global model: The Community Earth System Model version 2 (CESM2). The CESM2 sea ice model physic...

Publication Genre: Article

View on OpenSky

Limited surface impacts of the January 2021 sudden stratospheric warming

Davis, N. A., Richter, J. H., Glanville, A. A., Edwards, J., LaJoie, E.. (2022). Limited surface impacts of the January 2021 sudden stratospheric warming. Nature Communications, doi:https://doi.org/10.1038/s41467-022-28836-1

Subseasonal weather prediction can reduce economic disruption and loss of life, especially during "windows of opportunity" when noteworthy events in the Earth system are followed by characteristic weather patterns. Sudden stratospheric warm...

Publication Genre: Article

View on OpenSky

Assimilation of NASA's Airborne Snow Observatory snow measurements for improved hydrological modeling: A case study enabled by the coupled LIS/WRF-Hydro system

Lahmers, T. M., Kumar, S. V., Rosen, D., Dugger, A. L., Gochis, D., et al. (2022). Assimilation of NASA's Airborne Snow Observatory snow measurements for improved hydrological modeling: A case study enabled by the coupled LIS/WRF-Hydro system. Water Resources Research, doi:https://doi.org/10.1029/2021WR029867

The NASA LIS/WRF-Hydro system is a coupled modeling framework that combines the modeling and data assimilation (DA) capabilities of the NASA Land Information System (LIS) with the multi-scale surface hydrological modeling capabilities of th...

Publication Genre: Article

View on OpenSky

Ubiquity of human-induced changes in climate variability

Rodgers, K. B., Lee, S., Rosenbloom, N., Timmermann, A., Danabasoglu, G., et al. (2021). Ubiquity of human-induced changes in climate variability. Earth System Dynamics, doi:https://doi.org/10.5194/esd-12-1393-2021

While climate change mitigation targets necessarily concern maximum mean state changes, understanding impacts and developing adaptation strategies will be largely contingent on how climate variability responds to increasing anthropogenic pe...

Publication Genre: Article

View on OpenSky

Retreat and regrowth of the Greenland Ice Sheet during the last interglacial as simulated by the CESM2-CISM2 coupled climate-ice sheet model

Sommers, A., Otto-Bliesner, B., Lipscomb, W., Lofverstrom, M., Shafer, S. L., et al. (2021). Retreat and regrowth of the Greenland Ice Sheet during the last interglacial as simulated by the CESM2-CISM2 coupled climate-ice sheet model. Paleoceanography and Paleoclimatology, doi:https://doi.org/10.1029/2021PA004272

During the Last Interglacial, approximately 129 to 116 ka (thousand years ago), the Arctic summer climate was warmer than the present, and the Greenland Ice Sheet retreated to a smaller extent than its current state. Previous model-derived ...

Publication Genre: Article

View on OpenSky

CAM6.3 User's Guide

Craig, C. A., Bacmeister, J., Callaghan, P., Eaton, B. E., Gettelman, A., et al. (2021). CAM6.3 User's Guide. , doi:https://doi.org/10.5065/Z953-ZC95

The Community Atmosphere Model version 6.3 (CAM6.3) is released as the active atmosphere component of the Community Earth System Model version CESM-2.2. It is the latest in a series of global atmosphere models whose development is guided by...

Publication Genre: Technical Report

View on OpenSky

Introducing the new Regional Community Earth System Model, R-CESM

Fu, D., Small, R. J., Kurian, J., Liu, Y., Kauffman, B. G., et al. (2021). Introducing the new Regional Community Earth System Model, R-CESM. Bulletin of the American Meteorological Society, doi:https://doi.org/10.1175/BAMS-D-20-0024.1

The development of high-resolution, fully coupled, regional Earth system model systems is important for improving our understanding of climate variability, future projections, and extreme events at regional scales. Here we introduce and pre...

Publication Genre: Article

View on OpenSky

Simulating the impact of global reservoir expansion on the present-day climate

Vanderkelen, I., Lipzig, N. P. M., Sacks, W. J., Lawrence, D. M., Clark, M. P., et al. (2021). Simulating the impact of global reservoir expansion on the present-day climate. Journal of Geophysical Research: Atmospheres, doi:https://doi.org/10.1029/2020JD034485

Reservoir expansion over the last century has largely affected downstream flow characteristics. Yet very little is known about the impacts of reservoir expansion on the climate. Here, we implement reservoir construction in the Community Lan...

Publication Genre: Article

View on OpenSky

Predictability of the mesosphere and lower thermosphere during major sudden stratospheric warmings

Pedatella, N. M., Richter, J. H., Edwards, J., Glanville, A. A.. (2021). Predictability of the mesosphere and lower thermosphere during major sudden stratospheric warmings. Geophysical Research Letters, doi:https://doi.org/10.1029/2021GL093716

The predictability of the middle atmosphere during major sudden stratospheric warmings (SSWs) is investigated based on subseasonal hindcasts in the Community Earth System Model, version 2 with the Whole Atmosphere Community Climate Model as...

Publication Genre: Article

View on OpenSky

The ENEA-REG system (v1.0), a multi-component regional Earth system model: sensitivity to different atmospheric components over the Med-CORDEX (Coordinated Regional Climate Downscaling Experiment) region

Anav, A., Carillo, A., Palma, M., Struglia, M. V., Turuncoglu, U. U., et al. (2021). The ENEA-REG system (v1.0), a multi-component regional Earth system model: sensitivity to different atmospheric components over the Med-CORDEX (Coordinated Regional Climate Downscaling Experiment) region. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-14-4159-2021

In this study, a new regional Earth system model is developed and applied to the Med-CORDEX (Coordinated Regional Climate Downscaling Experiment) region. The ENEA-REG system is made up of two interchangeable regional climate models as atmos...

Publication Genre: Article

View on OpenSky

An overview of GPU enablement activities in STP and ASAP

Dennis, J. M., Suresh, S. M., Brown, C., Dobbins, B., Baker, A., et al. (2021). An overview of GPU enablement activities in STP and ASAP.

Publication Genre: Conference Material

View on OpenSky

Description and demonstration of the Coupled Community Earth System Model v2 – Community Ice Sheet Model v2 (cesm2-cism2)

Muntjewerf, L., Sacks, W. J., Lofverstrom, M., Fyke, J., Lipscomb, W., et al. (2021). Description and demonstration of the Coupled Community Earth System Model v2 – Community Ice Sheet Model v2 (cesm2-cism2). Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2020MS002356

Earth system/ice-sheet coupling is an area of recent, major Earth System Model (ESM) development. This work occurs at the intersection of glaciology and climate science and is motivated by a need for robust projections of sea-level rise. Th...

Publication Genre: Article

View on OpenSky

Bringing the future into focus: Benefits and challenges of high-resolution global climate change simulations

Yeager, S., Chang, P., Danabasoglu, G., Edwards, J., Rosenbloom, N., et al. (2021). Bringing the future into focus: Benefits and challenges of high-resolution global climate change simulations. Computing in Science & Engineering, doi:https://doi.org/10.1109/MCSE.2021.3068244

Future climate projections made with high-resolution climate models carry the promise of bridging the gap between weather and climate scales, but the scientific and technical hurdles remain daunting. New simulations carried out on Frontera ...

Publication Genre: Article

View on OpenSky

A positive zonal wind feedback on sudden stratospheric warming development revealed by CESM2 (WACCM6) reforecasts

Davis, N. A., Richter, J. H., Edwards, J., Glanville, A. A.. (2021). A positive zonal wind feedback on sudden stratospheric warming development revealed by CESM2 (WACCM6) reforecasts. Geophysical Research Letters, doi:https://doi.org/10.1029/2020GL090863

Sudden stratospheric warmings (SSWs) are an extreme weather event with impacts on the ionosphere and on tropospheric weather and predictability. The mechanisms governing their formation remain elusive, despite their deterministic predictabi...

Publication Genre: Article

View on OpenSky

Keeping science on keel when software moves

Ahn, D. H., Baker, A., Bentley, M., Briggs, I., Gopalakrishnan, G., et al. (2021). Keeping science on keel when software moves. Communications of the ACM, doi:https://doi.org/10.1145/3382037

HIGH PERFORMANCE COMPUTING (HPC) is central to solving large problems in science and engineering through the deployment of massive amounts of computational power. The development of important pieces of HPC software spans years or even decad...

Publication Genre: Article

View on OpenSky

An unprecedented set of high-resolution earth system simulations for understanding multiscale interactions in climate variability and change

Chang, P., Zhang, S., Danabasoglu, G., Yeager, S., Fu, H., et al. (2020). An unprecedented set of high-resolution earth system simulations for understanding multiscale interactions in climate variability and change. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2020MS002298

We present an unprecedented set of high-resolution climate simulations, consisting of a 500-year pre-industrial control simulation and a 250-year historical and future climate simulation from 1850 to 2100. A high-resolution configuration of...

Publication Genre: Article

View on OpenSky

A new end-to-end workflow for the Community Earth System Model (version 2.0) for the Coupled Model Intercomparison Project Phase 6 (CMIP6)

Mickelson, S., Bertini, A., Strand, W. G., Paul, K., Nienhouse, E. J., et al. (2020). A new end-to-end workflow for the Community Earth System Model (version 2.0) for the Coupled Model Intercomparison Project Phase 6 (CMIP6). Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-13-5567-2020

The complexity of each Coupled Model Intercomparison Project grows with every new generation. The Phase 5 effort saw a dramatic increase in the number of experiments that were performed and the number of variables that were requested compar...

Publication Genre: Article

View on OpenSky

Accelerated Greenland ice sheet mass loss under high greenhouse gas forcing as simulated by the coupled CESM2.1-CISM2.1

Muntjewerf, L., Sellevold, R., Vizcaino, M., Silva, C. E. d., Petrini, M., et al. (2020). Accelerated Greenland ice sheet mass loss under high greenhouse gas forcing as simulated by the coupled CESM2.1-CISM2.1. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2019MS002031

The Greenland ice sheet (GrIS) is now losing mass at a rate of 0.7 mm of sea level rise (SLR) per year. Here we explore future GrIS evolution and interactions with global and regional climate under high greenhouse gas forcing with the Commu...

Publication Genre: Article

View on OpenSky

Optimizing high-resolution Community Earth System Model on a heterogeneous many-core supercomputing platform

Zhang, S., Fu, H., Wu, L., Li, Y., Wang, H., et al. (2020). Optimizing high-resolution Community Earth System Model on a heterogeneous many-core supercomputing platform. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-13-4809-2020

With semiconductor technology gradually approaching its physical and thermal limits, recent supercomputers have adopted major architectural changes to continue increasing the performance through more power-efficient heterogeneous many-core ...

Publication Genre: Article

View on OpenSky

Transforming an observational assimilation application on CPU and GPU

Dennis, J. M., Dobbins, B., Baker, A., Kim, Y.. (2020). Transforming an observational assimilation application on CPU and GPU.

Publication Genre: Conference Material

View on OpenSky

An efficient ice sheet/Earth system model spin-up procedure for CESM2-CISM2: Description, evaluation, and broader applicability

Löfverström, M., Fyke, J. G., Thayer-Calder, K., Muntjewerf, L., Vizcaino, M., et al. (2020). An efficient ice sheet/Earth system model spin-up procedure for CESM2-CISM2: Description, evaluation, and broader applicability. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2019MS001984

Spinning up a highly complex, coupled Earth system model (ESM) is a time consuming and computationally demanding exercise. For models with interactive ice sheet components, this becomes a major challenge, as ice sheets are sensitive to bidi...

Publication Genre: Article

View on OpenSky

Greenland ice sheet contribution to 21st century sea level rise as simulated by the coupled CESM2.1-CISM2.1

Muntjewerf, L., Petrini, M., Vizcaino, M., Silva, C. E. d., Sellevold, R., et al. (2020). Greenland ice sheet contribution to 21st century sea level rise as simulated by the coupled CESM2.1-CISM2.1. Geophysical Research Letters, doi:https://doi.org/10.1029/2019GL086836

The Greenland Ice Sheet (GrIS) mass balance is examined with an Earth system/ice sheet model that interactively couples the GrIS to the broader Earth system. The simulation runs from 1850 to 2100, with historical and SSP5-8.5 forcing. By th...

Publication Genre: Article

View on OpenSky

Identification of major moisture sources across the Mediterranean Basin

Batibeniz, F., Ashfaq, M., Önol, B., Turuncoglu, U. U., Mehmood, S., et al. (2020). Identification of major moisture sources across the Mediterranean Basin. Climate Dynamics, doi:https://doi.org/10.1007/s00382-020-05224-3

We employ a Lagrangian based moisture back trajectory method on an ensemble of four reanalysis datasets to provide a comprehensive understanding of moisture sources over the Mediterranean land region (30° N–49.5° N and 9.75° W–61.5°...

Publication Genre: Article

View on OpenSky

Proceedings of the 2020 Improving Scientific Software Conference

Hu, W., Vento, D. D., Su, S., Banihirwe, A., Burnhart-Lupo, N., et al. (2020). Proceedings of the 2020 Improving Scientific Software Conference. , doi:https://doi.org/10.5065/p2jj-9878

The Software Engineering Assembly (SEA) is a loosely structured group of software engineers and scientists who write scientific software, mostly but not only at NCAR and mostly but not only in the field of atmospheric sciences. The mission ...

Publication Genre: Technical Report

View on OpenSky

Doubling of U.S. Population exposure to climate extremes by 2050

Batibeniz, F., Ashfaq, M., Diffenbaugh, N. S., Key, K., Evans, K. J., et al. (2020). Doubling of U.S. Population exposure to climate extremes by 2050. Earth's Future, doi:https://doi.org/10.1029/2019EF001421

We quantify historical and projected trends in the population exposure to climate extremes as measured by the United States National Center for Environmental Information Climate Extremes Index (CEI). Based on the analyses of the historical ...

Publication Genre: Article

View on OpenSky

Sensitivity of meteorological skill to selection of WRF-Chem physical parameterizations and impact on ozone prediction during the Lake Michigan Ozone Study (LMOS)

Abdi-Oskouei, M., Carmichael, G., Christiansen, M., Ferrada, G., Roozitalab, B., et al. (2020). Sensitivity of meteorological skill to selection of WRF-Chem physical parameterizations and impact on ozone prediction during the Lake Michigan Ozone Study (LMOS). Journal of Geophysical Research: Atmospheres, doi:https://doi.org/10.1029/2019JD031971

Ozone concentrations in excess of health-based standards occur along the coastline of Lake Michigan. A complex pattern of ozone precursor emissions interfaces with a complex meteorological environment, presenting a challenge for air quality...

Publication Genre: Article

View on OpenSky

The Community Earth System Model Version 2 (CESM2)

Danabasoglu, G., Lamarque, J., Bacmeister, J., Bailey, D. A., DuVivier, A. K., et al. (2020). The Community Earth System Model Version 2 (CESM2). Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2019MS001916

An overview of the Community Earth System Model Version 2 (CESM2) is provided, including a discussion of the challenges encountered during its development and how they were addressed. In addition, an evaluation of a pair of CESM2 long prein...

Publication Genre: Article

View on OpenSky

Present-day Greenland ice sheet climate and surface mass balance in CESM2

Kampenhout, L. v., Lenaerts, J. T. M., Lipscomb, W., Lhermitte, S., Noël, B., et al. (2020). Present-day Greenland ice sheet climate and surface mass balance in CESM2. Journal of Geophysical Research: Earth Surface, doi:https://doi.org/10.1029/2019JF005318

The response of the Greenland Ice Sheet (GrIS) to a warmer climate is uncertain on long time scales. Climate models, such as those participating in the Coupled Model Intercomparison Project phase 6 (CMIP6), are used to assess this uncertain...

Publication Genre: Article

View on OpenSky

The Community Land Model Version 5: Description of new features, benchmarking, and impact of forcing uncertainty

Lawrence, D. M., Fisher, R. A., Koven, C. D., Oleson, K. W., Swenson, S., et al. (2019). The Community Land Model Version 5: Description of new features, benchmarking, and impact of forcing uncertainty. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2018MS001583

The Community Land Model (CLM) is the land component of the Community Earth System Model (CESM) and is used in several global and regional modeling systems. In this paper, we introduce model developments included in CLM version 5 (CLM5), wh...

Publication Genre: Article

View on OpenSky

A new approach for in situ analysis in fully coupled earth system models

Turuncoglu, U. U., Önol, B., Ilıcak, M.. (2019). A new approach for in situ analysis in fully coupled earth system models.

Publication Genre: Unclassified

View on OpenSky

A new approach for in situ analysis in fully coupled earth system models [manuscript]

Turuncoglu, U. U., Önol, B., Ilicak, M.. (2019). A new approach for in situ analysis in fully coupled earth system models [manuscript].

This work focuses on enabling the use of existing in situ analysis and visualization methods within the model coupling framework, which is specially designed software layer to combine physical components of Earth system (i.e., atmosphere, o...

Publication Genre: Conference Material

View on OpenSky

A new approach for in situ analysis in fully coupled earth system models [presentation]

Turuncoglu, U. U., Önol, B., Ilıcak, M.. (2019). A new approach for in situ analysis in fully coupled earth system models [presentation].

Publication Genre: Conference Material

View on OpenSky

Coupled long-term wave simulations based on Regional Earth System Model over the Mediterranean sea

Batibeniz, F., Onol, B., Turuncoglu, U. U.. (2019). Coupled long-term wave simulations based on Regional Earth System Model over the Mediterranean sea.

We investigate wave climatology over the Mediterranean Basin using reanalysis/observations (ECMWF's ERA5 and MyOCEAN) and coupled Regional Earth System Model (RegESM). The RegESM model is run in coupled (RegCM4 coupled with ROMS and WAM) an...

Publication Genre: Conference Material

View on OpenSky

Modeling the hydroclimatic effects of local land use and land cover changes on the water budget in the upper Euphrates-Tigris basin

Yilmaz, Y. A., Sen, O. L., Turuncoglu, U. U.. (2019). Modeling the hydroclimatic effects of local land use and land cover changes on the water budget in the upper Euphrates-Tigris basin. Journal of Hydrology, doi:https://doi.org/10.1016/j.jhydrol.2019.06.074

The waters of the Euphrates and Tigris rivers have always been a vital resource in the water-food-energy nexus of the Middle East region. The currently ongoing Southeastern Anatolia Project (GAP) in Turkey aims to increase regional prosperi...

Publication Genre: Article

View on OpenSky

Exploring a lower-resolution physics grid in CAM-SE-CSLAM

Herrington, A. R., Lauritzen, P. H., Reed, K. A., Goldhaber, S., Eaton, B. E.. (2019). Exploring a lower-resolution physics grid in CAM-SE-CSLAM. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2019MS001684

This paper describes the implementation of a coarser-resolution physics grid into the Community Atmosphere Model (CAM), containing urn:x-wiley:jame:media:jame20916:jame20916-math-0001 fewer grid columns than the dynamics grid. The dry dynam...

Publication Genre: Article

View on OpenSky

The impact of rimed ice hydrometeors on global and regional climate

Gettelman, A., Morrison, H., Thayer-Calder, K., Zarzycki, C.. (2019). The impact of rimed ice hydrometeors on global and regional climate. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2018MS001488

Rimed hydrometeors (graupel or hail) are added to a stratiform cloud scheme for global models and tested in a variety of configurations. Off-line tests compare well to other cloud microphysics schemes with rimed ice used in mesoscale models...

Publication Genre: Article

View on OpenSky

Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance

Kampenhout, L. v., Rhoades, A. M., Herrington, A. R., Zarzycki, C., Lenaerts, J. T. M., et al. (2019). Regional grid refinement in an Earth system model: Impacts on the simulated Greenland surface mass balance. The Cryosphere, doi:https://doi.org/10.5194/tc-13-1547-2019

In this study, the resolution dependence of the simulated Greenland ice sheet surface mass balance (GrIS SMB) in the variable-resolution Community Earth System Model (VR-CESM) is investigated. Coupled atmosphere-land simulations are perform...

Publication Genre: Article

View on OpenSky

Coccolithophore growth and calcification in an acidified ocean: Insights from Community Earth System Model simulations

Krumhardt, K., Lovenduski, N. S., Long, M., Levy, M. N., Lindsay, K., et al. (2019). Coccolithophore growth and calcification in an acidified ocean: Insights from Community Earth System Model simulations. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2018MS001483

Anthropogenic CO2 emissions are inundating the upper ocean, acidifying the water, and altering the habitat for marine phytoplankton. These changes are thought to be particularly influential for calcifying phytoplankton, namely, coccolithoph...

Publication Genre: Article

View on OpenSky

Description and evaluation of the Community Ice Sheet Model (CISM) v2.1

Lipscomb, W., Price, S. F., Hoffman, M. J., Leguy, G., Bennett, A. R., et al. (2019). Description and evaluation of the Community Ice Sheet Model (CISM) v2.1. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-12-387-2019

We describe and evaluate version 2.1 of the Community Ice Sheet Model (CISM). CISM is a parallel, 3-D thermomechanical model, written mainly in Fortran, that solves equations for the momentum balance and the thickness and temperature evolut...

Publication Genre: Article

View on OpenSky

Physics-dynamics coupling with element-based high-order Galerkin methods: Quasi-equal-area physics grid

Herrington, A. R., Lauritzen, P. H., Taylor, M. A., Goldhaber, S., Eaton, B. E., et al. (2019). Physics-dynamics coupling with element-based high-order Galerkin methods: Quasi-equal-area physics grid. Monthly Weather Review, doi:https://doi.org/10.1175/MWR-D-18-0136.1

Atmospheric modeling with element-based high-order Galerkin methods presents a unique challenge to the conventional physics-dynamics coupling paradigm, due to the highly irregular distribution of nodes within an element and the distinct num...

Publication Genre: Article

View on OpenSky

The KPP boundary layer scheme for the ocean: Revisiting its formulation and benchmarking one-dimensional simulations relative to LES

Roekel, L. V., Adcroft, A. J., Danabasoglu, G., Griffies, S. M., Kauffman, B. G., et al. (2018). The KPP boundary layer scheme for the ocean: Revisiting its formulation and benchmarking one-dimensional simulations relative to LES. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2018MS001336

We evaluate the Community ocean Vertical Mixing project version of the K-profile parameterization (KPP) for modeling upper ocean turbulent mixing. For this purpose, one-dimensional KPP simulations are compared across a suite of oceanographi...

Publication Genre: Article

View on OpenSky

CESM1(WACCM) stratospheric aerosol geoengineering large ensemble project

Tilmes, S., Richter, J. H., Kravitz, B., MacMartin, D., Mills, M. J., et al. (2018). CESM1(WACCM) stratospheric aerosol geoengineering large ensemble project. Bulletin of the American Meteorological Society, doi:https://doi.org/10.1175/BAMS-D-17-0267.1

This paper describes the Stratospheric Aerosol Geoengineering Large Ensemble (GLENS) project, which promotes the use of a unique model dataset, performed with the Community Earth System Model, with the Whole Atmosphere Community Climate Mod...

Publication Genre: Article

View on OpenSky

A global coupled ensemble data assimilation system using the Community Earth System Model and the Data Assimilation Research Testbed

Karspeck, A., Danabasoglu, G., Anderson, J. L., Karol, S., Collins, N. S., et al. (2018). A global coupled ensemble data assimilation system using the Community Earth System Model and the Data Assimilation Research Testbed. Quarterly Journal of the Royal Meteorological Society, doi:https://doi.org/10.1002/qj.3308

This paper presents a description of the CESM/DART ensemble coupled data assimilation (DA) system based on the Community Earth System Model (CESM) and the Data Assimilation Research Testbed (DART) assimilation software. The CESM/DART should...

Publication Genre: Article

View on OpenSky

NCAR release of CAM-SE in CESM2.0: A reformulation of the spectral element dynamical core in dry-mass vertical coordinates with comprehensive treatment of condensates and energy

Lauritzen, P. H., Nair, R., Herrington, A. R., Callaghan, P., Goldhaber, S., et al. (2018). NCAR release of CAM-SE in CESM2.0: A reformulation of the spectral element dynamical core in dry-mass vertical coordinates with comprehensive treatment of condensates and energy. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1029/2017MS001257

It is the purpose of this paper to provide a comprehensive documentation of the new NCAR (National Center for Atmospheric Research) version of the spectral element (SE) dynamical core as part of the Community Earth System Model (CESM2.0) re...

Publication Genre: Article

View on OpenSky

A Unified DART ensemble data assimilation capability for CAM(-CHEM), WACCM, and WACCM-X

Raeder, K. D., Anderson, J. L., Hoar, T. J., Collins, N. S., Hendricks, J., et al. (2018). A Unified DART ensemble data assimilation capability for CAM(-CHEM), WACCM, and WACCM-X.

Publication Genre: Conference Material

View on OpenSky

Code optimization and the accumulated impact on scientific throughput of an HPC center

Dennis, J. M., Kelly, R., Edwards, J., Dobbins, B., Kerr, C. L., et al. (2018). Code optimization and the accumulated impact on scientific throughput of an HPC center.

Publication Genre: Conference Material

View on OpenSky

The accumulated impact of code optimizations on scientific throughput of CESM on Cheyenne

Dennis, J. M., Kelly, R., Edwards, J., Dobbins, B., Kerr, C. L., et al. (2018). The accumulated impact of code optimizations on scientific throughput of CESM on Cheyenne.

Publication Genre: Conference Material

View on OpenSky

The accumulated impact of code optimizations on scientific throughput of CESM on Cheyenne

Dennis, J. M., Kelly, R., Edwards, J., Dobbins, B., Kerr, C. L., et al. (2018). The accumulated impact of code optimizations on scientific throughput of CESM on Cheyenne.

Publication Genre: Conference Material

View on OpenSky

Using DART tools for CAM development

Raeder, K. D., Anderson, J. L., Hoar, T. J., Collins, N. S., Hendricks, J., et al. (2018). Using DART tools for CAM development.

Publication Genre: Conference Material

View on OpenSky

Plans for infrastructure development in CESM-CAM

Duda, M. G., Gill, D. O., Goldhaber, S., Vertenstein, M., Vitt, F. M.. (2018). Plans for infrastructure development in CESM-CAM.

Publication Genre: Conference Material

View on OpenSky

Simulated differences in 21st century aridity due to different scenarios of greenhouse gases and aerosols

Lin, L., Gettelman, A., Fu, Q., Xu, Y.. (2018). Simulated differences in 21st century aridity due to different scenarios of greenhouse gases and aerosols. Climatic Change, doi:https://doi.org/10.1007/s10584-016-1615-3

Aridity, defined as the ratio of precipitation (P) to potential evapotranspiration (PET) over land, is critical to natural ecosystems and agricultural production. Global climate models project global decreases of P/PET (drying) in the 21st ...

Publication Genre: Article

View on OpenSky

Projected changes in tropical cyclone activity under future warming scenarios using a high-resolution climate model

Bacmeister, J., Reed, K. A., Hannay, C. E., Lawrence, P. J., Bates, S. C., et al. (2018). Projected changes in tropical cyclone activity under future warming scenarios using a high-resolution climate model. Climatic Change, doi:https://doi.org/10.1007/s10584-016-1750-x

This study examines how characteristics of tropical cyclones (TCs) that are explicitly resolved in a global atmospheric model with horizontal resolution of approximately 28 km are projected to change in a warmer climate using bias-corrected...

Publication Genre: Article

View on OpenSky

The path to CAM6: Coupled simulations with CAM5.4 and CAM5.5

Bogenschutz, P. A., Gettelman, A., Hannay, C. E., Larson, V. E., Neale, R., et al. (2018). The path to CAM6: Coupled simulations with CAM5.4 and CAM5.5. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-11-235-2018

This paper documents coupled simulations of two developmental versions of the Community Atmosphere Model (CAM) towards CAM6. The configuration called CAM5.4 introduces new microphysics, aerosol, and ice nucleation changes, among others to C...

Publication Genre: Article

View on OpenSky

Improving the representation of polar snow and firn in the Community Earth System Model

Kampenhout, L. v., Lenaerts, J. T. M., Lipscomb, W., Sacks, W. J., Lawrence, D. M., et al. (2017). Improving the representation of polar snow and firn in the Community Earth System Model. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1002/2017MS000988

In Earth system models, terrestrial snow is usually modeled by the land surface component. In most cases, these snow models have been developed with an emphasis on seasonal snow. Questions about future sea level rise, however, prompt the ne...

Publication Genre: Article

View on OpenSky

A new and inexpensive non-bit-for-bit solution reproducibility test based on time step convergence (TSC1.0)

Wan, H., Zhang, K., Rasch, P. J., Singh, B., Chen, X., et al. (2017). A new and inexpensive non-bit-for-bit solution reproducibility test based on time step convergence (TSC1.0). Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-10-537-2017

A test procedure is proposed for identifying numerically significant solution changes in evolution equations used in atmospheric models. The test issues a "fail" signal when any code modifications or computing environment changes lead to so...

Publication Genre: Article

View on OpenSky

Vertical overlap of probability density functions of cloud and precipitation hydrometeors

Ovchinnikov, M., Lim, K. S., Larson, V. E., Wong, M., Thayer-Calder, K., et al. (2016). Vertical overlap of probability density functions of cloud and precipitation hydrometeors. Journal of Geophysical Research: Atmospheres, doi:https://doi.org/10.1002/2016JD025158

Coarse-resolution climate models increasingly rely on probability density functions (PDFs) to represent subgrid-scale variability of prognostic variables. While PDFs characterize the horizontal variability, a separate treatment is needed to...

Publication Genre: Article

View on OpenSky

The Earth System Prediction Suite: Toward a coordinated U.S. modeling capability

Theurich, G., DeLuca, C., Campbell, T., Liu, F., Saint, K., et al. (2016). The Earth System Prediction Suite: Toward a coordinated U.S. modeling capability. Bulletin of the American Meteorological Society, doi:https://doi.org/10.1175/BAMS-D-14-00164.1

The Earth System Prediction Suite (ESPS) is a collection of flagship U.S. weather and climate models and model components that are being instrumented to conform to interoperability conventions, documented to follow metadata standards, and m...

Publication Genre: Article

View on OpenSky

Langmuir mixing effects on global climate: WAVEWATCH III in CESM

Li, Q., Webb, A., Fox-Kemper, B., Craig, A., Danabasoglu, G., et al. (2016). Langmuir mixing effects on global climate: WAVEWATCH III in CESM. Ocean Modelling, doi:https://doi.org/10.1016/j.ocemod.2015.07.020

Large-Eddy Simulations (LES) have shown the effects of ocean surface gravity waves in enhancing the ocean boundary layer mixing through Langmuir turbulence. Neglecting this Langmuir mixing process may contribute to the common shallow bias i...

Publication Genre: Article

View on OpenSky

Evaluating and improving cloud phase in the Community Atmosphere Model version 5 using spaceborne lidar observations

Kay, J., Bourdages, L., Miller, N., Morrison, A., Yettella, V., et al. (2016). Evaluating and improving cloud phase in the Community Atmosphere Model version 5 using spaceborne lidar observations. Journal of Geophysical Research-Atmospheres, doi:https://doi.org/10.1002/2015JD024699

Spaceborne lidar observations from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) satellite are used to evaluate cloud amount and cloud phase in the Community Atmosphere Model version 5 (CAM5), the atmospher...

Publication Genre: Article

View on OpenSky

Addressing numerical challenges in introducing a reactive transport code into a land surface model: a biogeochemical modeling proof-of-concept with CLM–PFLOTRAN 1.0

Tang, G., Yuan, F., Bisht, G., Hammond, G., Lichtner, P., et al. (2016). Addressing numerical challenges in introducing a reactive transport code into a land surface model: a biogeochemical modeling proof-of-concept with CLM–PFLOTRAN 1.0. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-9-927-2016

We explore coupling to a configurable subsurface reactive transport code as a flexible and extensible approach to biogeochemistry in land surface models. A reaction network with the Community Land Model carbon–nitrogen (CLM-CN) decomposit...

Publication Genre: Article

View on OpenSky

Status of a CAM5.5 reanalysis for CESM research

Raeder, K. D., Bertini, A., Edwards, J., Vertenstein, M., Anderson, J. L., et al. (2016). Status of a CAM5.5 reanalysis for CESM research.

Publication Genre: Conference Material

View on OpenSky

Simulated responses of terrestrial aridity to black carbon and sulfate aerosols

Lin, L., Gettelman, A., Xu, Y., Fu, Q.. (2016). Simulated responses of terrestrial aridity to black carbon and sulfate aerosols. Journal of Geophysical Research-Atmospheres, doi:https://doi.org/10.1002/2015JD024100

Aridity index (AI), defined as the ratio of precipitation to potential evapotranspiration (PET), is a measure of the dryness of terrestrial climate. Global climate models generally project future decreases of AI (drying) associated with glo...

Publication Genre: Article

View on OpenSky

Continental-scale temperature variability in PMIP3 simulations and PAGES 2k regional temperature reconstructions over the past millennium

Bothe, O., Evans, M., Denado, L. F., Bustamante, E. G., Gergis, J., et al. (2015). Continental-scale temperature variability in PMIP3 simulations and PAGES 2k regional temperature reconstructions over the past millennium. Climate of the Past, doi:https://doi.org/10.5194/cp-11-1673-2015

Estimated external radiative forcings, model results, and proxy-based climate reconstructions have been used over the past several decades to improve our understanding of the mechanisms underlying observed climate variability and change ove...

Publication Genre: Article

View on OpenSky

A unified parameterization of clouds and turbulence using CLUBB and subcolumns in the Community Atmosphere Model

Thayer-Calder, K., Gettelman, A., Craig, C. A., Goldhaber, S., Bogenschutz, P. A., et al. (2015). A unified parameterization of clouds and turbulence using CLUBB and subcolumns in the Community Atmosphere Model. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-8-3801-2015

Most global climate models parameterize separate cloud types using separate parameterizations. This approach has several disadvantages, including obscure interactions between parameterizations and inaccurate triggering of cumulus parameteri...

Publication Genre: Article

View on OpenSky

Taking off the training wheels: The properties of a dynamic vegetation model without climate envelopes, CLM4.5(ED)

Fisher, R. A., Muszala, S. P., Vertenstein, M., Lawrence, P. J., Xu, C., et al. (2015). Taking off the training wheels: The properties of a dynamic vegetation model without climate envelopes, CLM4.5(ED). Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-8-3593-2015

We describe an implementation of the Ecosystem Demography (ED) concept in the Community Land Model. The structure of CLM(ED) and the physiological and structural modifications applied to the CLM are presented. A major motivation of this dev...

Publication Genre: Article

View on OpenSky

Does extreme precipitation intensity depend on the emissions scenario?

Pendergrass, A., Lehner, F., Sanderson, B., Xu, Y.. (2015). Does extreme precipitation intensity depend on the emissions scenario?. Geophysical Research Letters, doi:https://doi.org/10.1002/2015GL065854

The rate of increase of global-mean precipitation per degree global-mean surface temperature increase differs for greenhouse gas and aerosol forcings and across emissions scenarios with differing composition of change in forcing. We investi...

Publication Genre: Article

View on OpenSky

An ensemble-based consistency test for the Community Earth System Model

Baker, A., Hammerling, D., Levy, M. N., Xu, H., Dennis, J. M., et al. (2015). An ensemble-based consistency test for the Community Earth System Model.

Publication Genre: Conference Material

View on OpenSky

A new ensemble-based consistency test for the Community Earth System Model (pyCECT v1.0)

Baker, A., Hammerling, D., Levy, M. N., Xu, H., Dennis, J. M., et al. (2015). A new ensemble-based consistency test for the Community Earth System Model (pyCECT v1.0). Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-8-2829-2015

Climate simulation codes, such as the Community Earth System Model (CESM), are especially complex and continually evolving. Their ongoing state of development requires frequent software verification in the form of quality assurance to both ...

Publication Genre: Article

View on OpenSky

From local perception to global perspective

Lehner, F., Stocker, T.. (2015). From local perception to global perspective. Nature Climate Change, doi:https://doi.org/10.1038/nclimate2660

Recent sociological studies show that over short time periods the large day-to-day, month-to-month or year-to-year variations in weather at a specific location can influence and potentially bias our perception of climate change, a more long...

Publication Genre: Article

View on OpenSky

The Community Earth System Model (CESM) large ensemble project: A community resource for studying climate change in the presence of internal climate variability

Kay, E., Deser, C., Phillips, A., Mai, A. W., Hannay, C. E., et al. (2015). The Community Earth System Model (CESM) large ensemble project: A community resource for studying climate change in the presence of internal climate variability. Bulletin of the American Meteorological Society, doi:https://doi.org/10.1175/BAMS-D-13-00255.1

While internal climate variability is known to affect climate projections, its influence is often underappreciated and confused with model error. Why? In general, modeling centers contribute a small number of realizations to international c...

Publication Genre: Article

View on OpenSky

Climate and carbon cycle dynamics in a CESM simulation from 850 to 2100 CE

Lehner, F., Joos, F., Raible, C., Mignot, J., Born, A., et al. (2015). Climate and carbon cycle dynamics in a CESM simulation from 850 to 2100 CE. Earth System Dynamics, doi:https://doi.org/10.5194/esd-6-411-2015

Under the protocols of phase 3 of the Paleoclimate Modelling Intercomparison Project, a number of simulations were produced that provide a range of potential climate evolutions from the last millennium to the end of the current century. Her...

Publication Genre: Article

View on OpenSky

A model-tested North Atlantic Oscillation reconstruction for the past millennium

Ortega, P., Lehner, F., Swingedouw, D., Masson-Delmotte, V., Raible, C., et al. (2015). A model-tested North Atlantic Oscillation reconstruction for the past millennium. Nature, doi:https://doi.org/10.1038/nature14518

The North Atlantic Oscillation (NAO) is the major source of variability in winter atmospheric circulation in the Northern Hemisphere, with large impacts on temperature, precipitation and storm tracks1, and therefore also on strategic sector...

Publication Genre: Article

View on OpenSky

Reconciling reconstructed and simulated features of the winter Pacific/North American pattern in the early 19th century

Zanchettin, D., Bothe, O., Lehner, F., Ortega, P., Raible, C., et al. (2015). Reconciling reconstructed and simulated features of the winter Pacific/North American pattern in the early 19th century. Climate of the Past, doi:https://doi.org/10.5194/cp-11-939-2015

Reconstructions of past climate behavior often describe prominent anomalous periods that are not necessarily captured in climate simulations. Here, we illustrate the contrast between an interdecadal strong positive phase of the winter Pacif...

Publication Genre: Article

View on OpenSky

Improved parallel performance of the CICE model in CESM1

Craig, A., Mickelson, S., Hunke, E., Bailey, D. A.. (2015). Improved parallel performance of the CICE model in CESM1. International Journal of High Performance Computing Applications, doi:https://doi.org/10.1177/1094342014548771

The Los Alamos sea ice model, CICE, is a sophisticated finite difference grid point model. It has been a part of the National Science Foundation and Department of Energy community climate models (Community Climate System Model (CCSM) and Co...

Publication Genre: Article

View on OpenSky

Light-weight parallel Python tools within the CESM workflow [presentation]

Mickelson, S., Bertini, A.. (2015). Light-weight parallel Python tools within the CESM workflow [presentation].

Publication Genre: Conference Material

View on OpenSky

CESM Workflow Refactor Project

Mickelson, S., Bertini, A.. (2015). CESM Workflow Refactor Project.

Publication Genre: Conference Material

View on OpenSky

CESM workflow plans [presentation]

Mickelson, S., Bertini, A.. (2015). CESM workflow plans [presentation].

Publication Genre: Conference Material

View on OpenSky

CESM Workflow Refactor Project [presentation]

Mickelson, S., Bertini, A.. (2015). CESM Workflow Refactor Project [presentation].

Publication Genre: Conference Material

View on OpenSky

Advanced two-moment bulk microphysics for global models. Part II: Global model solutions and aerosol-cloud interactions

Gettelman, A., Morrison, H., Santos, S., Bogenschutz, P. A., Caldwell, P.. (2015). Advanced two-moment bulk microphysics for global models. Part II: Global model solutions and aerosol-cloud interactions. Journal of Climate, doi:https://doi.org/10.1175/JCLI-D-14-00103.1

A modified microphysics scheme is implemented in the Community Atmosphere Model, version 5 (CAM5). The new scheme features prognostic precipitation. The coupling between the microphysics and the rest of the model is modified to make it more...

Publication Genre: Article

View on OpenSky

Detecting changes in marine responses to ENSO from 850 to 2100 C.E.: Insights from the ocean carbon cycle

Keller, K., Joos, F., Lehner, F., Raible, C.. (2015). Detecting changes in marine responses to ENSO from 850 to 2100 C.E.: Insights from the ocean carbon cycle. Geophysical Research Letters, doi:https://doi.org/10.1002/2014GL062398

It is open whether El Niño-Southern Oscillation (ENSO) varies under climate change and how potential changes in the marine system are detectable. Here differences in the influence of ENSO on biogeochemical tracers, pH, productivity, and oc...

Publication Genre: Article

View on OpenSky

CESM and POP workflow [presentation]

Mickelson, S., Bertini, A.. (2015). CESM and POP workflow [presentation].

Publication Genre: Conference Material

View on OpenSky

A new synoptic-scale resolving global climate simulation using the Community Earth System Model

Small, R. J., Bacmeister, J., Bailey, D. A., Baker, A., Bishop, S., et al. (2014). A new synoptic-scale resolving global climate simulation using the Community Earth System Model. Journal of Advances in Modeling Earth Systems, doi:https://doi.org/10.1002/2014MS000363

High-resolution global climate modeling holds the promise of capturing planetary-scale climate modes and small-scale (regional and sometimes extreme) features simultaneously, including their mutual interaction. This paper discusses a new st...

Publication Genre: Article

View on OpenSky

The spectral element method (SEM) on variable-resolution grids: Evaluating grid sensitivity and resolution-aware numerical viscosity

Guba, O., Taylor, M., Ullrich, P., Overfelt, J., Levy, M. N.. (2014). The spectral element method (SEM) on variable-resolution grids: Evaluating grid sensitivity and resolution-aware numerical viscosity. Geoscientific Model Development, doi:https://doi.org/10.5194/gmd-7-2803-2014

We evaluate the performance of the Community Atmosphere Model's (CAM) spectral element method on variable-resolution grids using the shallow-water equations in spherical geometry. We configure the method as it is used in CAM, with dissipati...

Publication Genre: Article

View on OpenSky