The CAUSES project and preliminary results from CAM5

 

Authors

Hsi-Yen Ma — Lawrence Livermore National Laboratory
Stephen Klein — Lawrence Livermore National Laboratory
Shaocheng Xie — Lawrence Livermore National Laboratory
Min-Hui Lo — National Taiwan University
Yunyan Zhang — Lawrence Livermore National Laboratory
Yuying Zhang — Lawrence Livermore National Laboratory

Category

General Topics

Description

The Clouds Above the United States and Errors at the Surface (CAUSES) is a joint project between PCMDI/LLNL and U.K. Met Office to evaluate the central U.S. summertime surface warm biases seen in many climate models. The main focus is to identify the role of cloud, radiation, and precipitation processes in contributing to the temperature biases. We use short-term hindcast approach and look at the growth of the error as a function of hindcast lead time. The study period covers from April 1 to August 31, 2011, which also covers the MC3E campaign. Some preliminary results of CAM5 compared to data from DOE ARM SGP site and other available observations will be presented during the meeting. We will demonstrate the impact of different land initial conditions on the surface energy budget and temperature biases. This study is funded by the Atmospheric System Research and Regional and Global Climate Modeling programs of the U.S. Department of Energy as part of the CAPT. This work is performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL-ABS-648556

Lead PI

Stephen Klein — Lawrence Livermore National Laboratory