Soil Evaporation, Transpiration and Canopy Evaporation in Community Land Model (CLM 3.0) Compared to Simple Biosphere Model (SiB 2.0)

这个为期12个月的项目将诊断社区气候系统模型（CCSM 3）的社区土地模型版本3（CLM 3）中的问题-由国家大气研究中心（NCAR）维护的大学社区使用的气候模型。 新开发的陆面参数与当前卫星数据一致，导致CCSM 3模拟中全年降水减少，土壤干燥，蒸散量减少-这是一个意想不到和不可接受的结果。 PI将为CLM 3开发与现有经过充分验证的陆地模型相匹配的陆地表面参数化，以查明行为的来源，并利用观测到的通量塔数据进行验证。 我们的目标是在社区模型中纠正这个问题。 这些方案执行机构将扩大简易Excel陆面参数化调查工具的开发，用于陆面模型参数化的相互比较，并将其提供给社区用于研究和教育活动。

This 12-month project will diagnose a problem in the Community Land Model Version 3 (CLM3) of the Community Climate System Model (CCSM3) - the climate model for use by the university community maintained by the National Center for Atmospheric Research (NCAR). Newly-developed land surface parameters consistent with current satellite data result in year round reduced precipitation, dryer soils and reduced evapotranspiration in CCSM3 simulation - an unexpected and unacceptable result. The PIs will develop matching land surface parameterizations for CLM3 consistent with an existing well-validated land model to pinpoint the sources of the behavior, and validate with observed flux tower data. The goal is to correct this problem in the community model. The PIs will extend the development of the Simple Excel Land Surface Parameterization Investigation Tool for land surface model parameterization inter-comparison and make it available to the community for research and educational activities.