Report of the CSM Land Working Group Meeting

Fourth Annual Climate System Model Workshop

By Gordon Bonan, Co-Chair

Breckenridge, Colorado

June 23, 1999


The Land Working Group breakout session consisted of two parts. In the first phase, several speakers working on projects integral to further development of the land model for CSM gave 15 to 20 minute presentations on their work. Jay Famiglietti (University of Texas) provided an update on his river routing model for CSM. He discussed alternative routing schemes and presented a series of proposed experiments to examine the importance of river routing in the context of CSM. Christine Delire (University of Wisconsin) gave an update on the project to include the IBIS dynamic ecosystem model in CSM. Preliminary results of her coupling of models were very encouraging. Andrea Hahmann (University of Arizona) presented her work on the fine mesh land model. Her experiments with CCM3, in which the atmosphere was run on a T42 grid but the land was run on a one-half degree grid, showed the importance of fine-scale processes.

The second phase of the meeting was devoted to the development of the Common Land Model for use with CSM. Xubin Zeng (University of Arizona) gave an update on the status of the Common Land Model. Then, Yong-Jiu Dai (University of Arizona), Keith Oleson (NCAR), Adam Schlosser (COLA), and Paul Houser (Goddard Space Flight Center) talked about specific tests they have performed with the model. Based on these tests, the working group was quite enthusiastic about adopting the Common Land Model for use with CSM. Finally, in the context of model testing, Scott Denning (Colorado State University) presented work he has done on multivariate model parameter sensitivity.

Priorities for the Land Working Group:

  1. To continue beta testing of the Common Land Model with the goal of releasing version one in January, 2000. A follow-up meeting for the Common Land Model steering committee will be held at COLA in November to discuss the progress of the model.

  2. Begin to expand the model to include biogeochemistry, ecosystem dynamics, and river routing.