PAMIP Workshop

2021 PAMIP Workshop Agenda & Presentations

2021 PAMIP workshop was held virtually on March 30 - April 1. The pre-recorded video presentations and 5-minute presentations have been archived in the google drive that are only available to the PAMIP participants who are on the google group (pamip@ucar.edu). If you wish to join this google group, please email Lantao Sun [lantao.sun@colostate.edu].

• Click to download the pre-recorded video presentations

• Click to download the 5-minute presentations (pdf format)

Tuesday, March 30 2021

Time Presenter Title
08:00-09:00Session 1: Polar amplification and Arctic-midlatitude connections
Chair: Clara Deser
08:00Clara DeserWelcome and logistics
08:05Hyo-Seok ParkOpposing influences of ozone depleting substances and anthropogenic aerosols on Arctic warming over the last 65 years in NCAR CESM2
08:10Lei WangPolar Amplification in CESM is dominated by extra-polar forcing and resultant feedback
08:15Dan LuntPolar amplification in paleoclimates - can paleo observations constrain CMIP6 model simulations?
08:20James ScreenObserved statistical connections overestimate the causal effects of Arctic sea-ice changes on midlatitude winter climate
08:25Hye-Jin KimSubseasonal relationship between Arctic and Eurasian surface air temperature
08:30Yungi HongWarmer and less icy Arctic leading to more violent weather in mid-latitudes
08:35Q & A session
08:45Break
09:00-10:30Session 2: Arctic-midlatitude linkages
Chair: Clara Deser
08:30Gang ChenEvaluations of atmospheric variability in the PAMIP simulations
08:30Evangelos Tyrlis Exploring remote and local drivers of blocking activity changes in PAMIP simulations
08:30Yannick PeingsInfluence of internal variability: how to ensure results are robust?
08:30Melissa GervaisIdentifying changes in atmospheric variability due to Arctic sea ice loss with machine learning
08:30Qinghua DingEnhanced NH jet stream waviness induced by remote forcing from the tropics vs the Arctic
08:30Mian XuImpact of Barents-Kara-Sea sea ice reduction on the variation of East Asian trough in late winter
09:30Q & A session
09:40Break
10:00Break-out groups ((all groups consider the same set of questions):
What are the open questions and how do we make progress on understanding:
• Mechanisms of polar amplification
• Atmospheric circulation response to polar amplification
• Causality in Arctic-midlatitude linkages and inferences from observations
Chairs: Gang Chen, Yannick Peings, Melissa Gervais, Qinghua Ding
10:30Adjourn for the day

Wednesday, March 31 2021

Time Presenter Title
08:00-09:00Session 3: Arctic-midlatitude linkages: sensitivities and observational constraints
Chair: James Screen
08:05Yannick PeingsSynthesis report of the breakout groups from the previous day
08:10Gudrun MagnusdottirWarm Arctic, cold Siberia pattern: how deep is the projected Arctic warming?
08:15Tido SemmlerResolution dependency of response to Arctic sea ice decline in PAMIP
08:20Guillaume GastineauModulation of the winter atmospheric response to Arctic sea-ice loss by the Pacific decadal oscillation
08:25Ralf JaiserLinkages between Arctic and mid-Latitude weather and climate: unraveling the impact of changing sea ice and sea surface temperatures
08:30Svenya ChripkoDynamical and thermodynamical contributions to the mid-latitude atmospheric response to Arctic sea ice decline
08:30Doug SmithObservationally constrained multi-model atmospheric response to future Arctic sea ice loss
08:35Q & A session
08:45Break
09:00-10:30Session 4: Arctic-midlatitude linkages: role of the stratosphere
Chair: James Screen
08:30Yu-Chiao LiangInvestigating the stratospheric response to Arctic sea-ice loss in PAMIP’s transient coupled experiments
08:30Jiankai ZhangImpacts of Arctic stratospheric polar vortex on the East Asian Trough
08:30Rosie EadeRole of the QBO in response to Arctic Sea Ice Loss
08:30Amber WalshInteraction between sea-ice loss, ENSO and QBO state
08:30Lantao SunUncertainty in the winter atmospheric response to Arctic sea ice loss: the role of stratospheric internal variability
08:30Michael SigmondThe role of the basic state, the stratospheric pathway and internal variability in the atmospheric response to sea ice loss
09:30Q & A session
09:40Break
10:00Break-out groups ((all groups consider the same set of questions):
What are the open questions and how do we make progress on understanding:
• Factors influencing the response to Arctic sea ice loss
• The role of stratosphere-troposphere coupling
• Observational constraints
Chairs: Gudrun Magnusdottir, Tido Semmler, Rosie Eade, Michael Sigmond
10:30Adjourn for the day

Thursday, April 1 2021

Time Presenter Title
08:00-08:55Session 5: Influence of polar amplification on global climate: role of ocean-atmosphere coupling (I)
Chair: Doug Smith
08:05Lantao SunSynthesis report of the breakout groups from the previous day
08:10Elisa ManziniAir-sea Interactions and the atmospheric response to Arctic Sea Ice Loss
08:15Rym MsadekMulti-model assessment of the decadal and longer oceanic response to Arctic sea ice reduction
08:20Wei LiuGlobal climate impacts of Arctic sea ice loss: the role of ocean circulation
08:25Paul KushnerAre ocean-atmosphere responses to sea ice loss and greenhouse forcing separable?
08:30Holly AyresThe coupled climate response to Antarctic sea ice loss
08:30Stephanie HayThe relative roles of Arctic and Antarctic sea-ice loss in the climate response to greenhouse warming
08:35Q & A session
08:45Break
08:55-10:30Session 6: Arctic-midlatitude linkages: role of ocean-atmosphere coupling (II)
Chair: Doug Smith
08:55Tiffany ShawThe midlatitude response to polar sea ice loss and polar amplification: Idealized slab-ocean aquaplanet experiments with thermodynamic sea ice
09:00Tien-Yiao HsuDoes Ekman coupling explain the damping of the ITCZ shift in fully coupled Arctic sea-ice loss experiments compared to the same forcing in a slabocean model set-up?
09:05Mark EnglandArtificial heating of the Arctic in sea ice loss simulations
09:10Alexandre AudetteDesign and execution of the long-coupled simulations of PAMIP Tier 3
09:15Q & A session
09:25Break-out groups ((all groups consider the same set of questions):
What are the open questions and how do we make progress on understanding:
• Ocean’s response to Arctic and Antarctic sea ice loss
• Role of ocean-atmosphere coupling in the global climate response to polar sea ice loss
• “Tug of war” between GHG-induced tropical warming and polar warming
• Constraining the sea ice in the coupled PAMIP experiments
Chairs: Elisa Manzini, Rym Msadek, Paul Kushner, Mark England
09:45Break
10:05Rym MsadekSynthesis report of the breakout groups
10:10Closing discussion and next steps: Identify 2-3 PAMIP research priorities and group papers (led by Clara Deser)
10:30Workshop Adjourns

2019 PAMIP Workshop Agenda & Presentations

Monday, June 24 2019

Time Title
17:00-19:00Welcome drinks (White Hart)
19:00Dinner (White Hart)

Tuesday, June 25 2019

Time Presenter Title Presentation
07:30-09:00Breakfast (White Hart)
09:00-10:30 Morning session 1 (Upper Gatehouse)
Chair: James Screen
09:00James ScreenWelcome and logistics
09:15Tido SemmlerEarly results from the PAMIP experiments with ECHAM6 and OpenIFSDownload
09:30Lantao SunAtmospheric circulation response to past and future polar sea ice loss in PAMIP time slice experimentsDownload
09:45Rym MsadekNorthern Hemisphere atmospheric response to Arctic sea ice reduction in the CNRM model: initial results from PAMIP experimentsDownload
10:00Masato MoriEarly results about atmospheric response to sea-ice loss using PAMIP experimentsDownload
10:15Lise GraffPreliminary results from PAMIP simulations with the NorESMDownload
10:30-11:00 Morning break (West Wing Lounge)
11:00-11:30 Morning session 2 (Upper Gatehouse)
Chair: Doug Smith
11:00Michael SigmondThe Canadian Earth System Model version 5 (CanESM5) and its contribution to PAMIPDownload
11:15Shuting Yang Factors influencing the atmospheric responses to Arctic sea ice reductionDownload
11:30Rosie EadeGlobal response to regional sea ice loss Download
11:45Alexandre AudetteNew coordinated simulations to help explain Arctic-midlatitude linkages mediated by moist isentropic overturning atmospheric circulation responsesDownload
12:00Yannick PeingsAtmosphere-only PAMIP experiments with SC-WACCM: is this signal or noise? Download
12:15Elisa ManziniThe Arctic winter stratosphere in PAMIP atmosphere-only experiments Download
12:30-14:00 Lunch (Solar)
14:00-15:30 Afternoon session 1 (Upper Gatehouse)
Chair: Elisa Manzini
14.00Gudrun MagnusdottirImpact of the QBO on the response to Arctic sea ice loss Download
14.15Jinro UkitaImportance of the stratospheric background state suggested by QBO impacts on Arctic–midlatitude climate linkage Download
14.30Ralf JaiserImproving the representation of linkages between the Arctic and mid-latitudes by implementing fast interactive ozone chemistry Download
14.45Jiankai ZhangPersistent Shift of the Arctic Polar Vortex and its climate effects Download
15.00Yu-Chiao LiangAtmospheric responses to Arctic sea-ice loss in high-top Whole Atmosphere Community Climate Model version 6 (WACCM6) [Pre-recorded] Download
15:30-15:45 Afternoon break (West Wing Lounge)
15:45-17:15 Afternoon session 2 (Upper Gatehouse)
Chair: Daniela Matei
15.45Xavier LevineSeasonal anomalies in Arctic sea ice and their association with Northern Hemisphere climate variability, on intraseasonal to interannual timescales Download
16.00Javier Garcia-SerranoMulti-model assessment of the impact of Arctic sea-ice variability on the winter North Atlantic-Eurasian atmospheric circulation Download
16.15Steve DelhayeImpact of an abrupt Arctic sea ice reduction in the water balance over high and mid-latitudes: a multi-model approach Download
16.30Guillaume GastineauClimate influence of sea-ice variability and its link with the tropical Pacific and Atlantic Ocean Download
16.45Discussion: Talking points from day 1
17:30-18:30Pre-dinner walk (meet in the Courtyard)
19:00Dinner (Solar)

Wednesday, June 26 2019

Time Presenter Title Presentation
07:30-09:00Breakfast (White Hart)
09:00-10:30 Morning session 1 (Upper Gatehouse)
Chair: Gudrun Magnusdottir
09.00Fumiaki OgawaEvaluating impacts of recent sea-ice and SST changes on the Northern Hemisphere winter climate change through coordinated experimentsDownload
09.15Tido SemmlerImpact of regionally increased CO2 concentrations in coupled climate simulationsDownload
09.35Russell BlackportInfluence of Arctic Sea Ice Loss in Autumn Compared to That in Winter on the Atmospheric CirculationDownload
09.45Yutian WuAre midlatitude circulation responses linearly additive to regional Arctic Amplification? Insights from an idealized Atmospheric General Circulation ModelDownload
10.00Mark EnglandTropical climate responses to projected Arctic and Antarctic sea ice lossDownload
10.15Holly AyresClimate Response to Projected Antarctic Sea Ice LossDownload
10:30-11:00 Morning break (West Wing Lounge)
11:00-11:30 Morning session 2 (Upper Gatehouse)
Chair: Jennifer Kay
11.00Jin-Ho YoonSensitivity of the Arctic climate forcing due to atmospheric physical parameterizationsDownload
11.15Daniela MateiUral Blocking, Warming Arctic and Cold Siberian spells Download
11.30Rohit GhoshReconciling the role of Arctic Amplification and atmospheric internal variability on Eurasian winterDownload
11.45Ruonan ZhangRole of Eurasian snow cover in linking winter–spring Eurasian coldness to the autumn Arctic sea ice retreatDownload
12.00James ScreenDo models underestimate the atmospheric response to Arctic sea-ice loss?Download
12.15Laurent TerrayCan we attribute recent changes in extremes and flow waviness to Arctic amplification?Download
12:30-14:00 Lunch (Solar)
14:00-15:30 Afternoon session 1 (Upper Gatehouse)
Chair: Laurent Terray
14.00Jennifer KayThe influence of clouds on Arctic Amplification Download
14.15Malte StueckerPolar amplification dominated by local forcing and feedbacks Download
14.30Karoline BlockClimate models disagree on the sign of total radiative feedback in the Arctic Download
14.45Masakazu YoskimoriThe impact of mid-high-latitude warming on tropical precipitation change
15.00Deepashree DuttaA modelling study of the possible role of clouds and sea ice in strong polar amplification during warm climates Download
15:30-15:45 Afternoon break (West Wing Lounge)
15:45-17:15 Afternoon session 2 (Upper Gatehouse)
Chair: Paul Kushner
15.45Wonsun ParkComparison of Arctic and Antarctic response to global warming: mean state and variability Download
16.00Judah CohenChallenges for dynamical models in simulating sea ice forcing on mid-latitude weather/climate variability Download
16.15Hyo-Seok ParkMulti-model Arctic sea ice responses to mid-Holocene insolation forcing Download
16.30Discussion: Talking points from day 2
17:30-18:30Pre-dinner walk (meet in the Courtyard)
19:00Dinner (Solar)

Thursday, June 27 2019

Time Presenter Title Presentation
07:30-09:00Breakfast (White Hart)
09:00-10:30 Morning session 1 (Upper Gatehouse)
Chair: Rym Msadek
09.00Paul KushnerIsolating the ocean’s role in the coupled climate response to high-latitude forcing, and implications for PAMIP Download
09.15Lantao SunHow much should we worry about the sea ice melting method in PAMIP?Download
09.30Discussion: PAMIP coupled run protocol
10:30-11:00 Morning break (West Wing Lounge)
11:00-11:30 Morning session 2 (Upper Gatehouse)
Chair: James Screen
10.30-10.45Doug SmithMulti-model assessment of the mid-latitude atmospheric response to future Arctic sea ice lossDownload
10-45-11:30Discussion: Coordinating analysis, next steps.
11:30Finish; takeaway lunch available

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