v2 Campaign

E3SM v2 will be used in a “v2 simulation campaign” , and similarly to v1 campaign it will consist of major simulations addressing the science questions of science drivers in the water cycle, biogeochemistry, and the cryosphere systems.

E3SM has a unique capability for variable resolution modeling using unstructured grids in all its Earth system component models. During Phase I, a regional refined model (RRM) with a high-resolution region over the U.S. has been used for evaluating physics parameterizations for high resolution modeling. This RRM strategy has proven useful for understanding atmosphere model behavior at high resolution, bypassing the need to run more computationally expensive global high-resolution simulations for parameterization testing and calibration. RRM is an important E3SM strategy for large ensemble high resolution simulations and development towards global convection permitting simulations in v3/v4 using a nonhydrostatic model in Phase III. As a result, the goal in Phase II is to begin to move the “proof of concept” RRM to more routine use. This will allow the project to gain expertise in the use of scale-aware parameterizations and address science questions that benefit from higher resolution modeling.