Journal
JOURNAL OF CLIMATE
Volume 18, Issue 23, Pages 5086-5094Publisher
AMER METEOROLOGICAL SOC
DOI: 10.1175/JCLI3595.1
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In arid and semiarid regions most of the solar radiation penetrates through the canopy and reaches the ground, and hence the turbulent exchange coefficient under canopy C-s becomes important. The use of a constant C-s that is only appropriate for thick canopies is found to be primarily responsible for the excessive warm bias of around 10 K in monthly mean ground temperature over these regions in version 2 of the Community Climate System Model (CCSM2). New C-s formulations are developed for the consistent treatment of undercanopy turbulence for both thick and thin canopies in land models, and provide a preliminary solution of this problem.
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