CLM-AG: An Agriculture Module for the Community Land Model version 3.5
Name
MITJPSPGC_Rpt229.pdf
Size
1.68 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Gueneau, Arthur
Schlosser, C. Adam
Strzepek, Kenneth M.
Gao, Xiang
Monier, Erwan
Date Issued
September 2012
Publisher
MIT Joint Program on the Science and Policy of Global Change
Citation
Report 229
Series/Report no.
Joint Program Reports;229
Abstract
It is estimated that 40% of all crops grown in the world today are grown using irrigation. As a consequence,
shifting precipitation patterns due to climate change are viewed as a major threat to food security. This
report presents the Community Land Model-Agriculture module (CLM-AG), which models crop growth and
water stress. The CLM-AG model is a global generic crop model built in the framework of the Community
Land Model version 3.5. This report describes the structure and main routines of the model. Two different
evaluations of the model are then considered. First, at a global level, CLM-AG is run under a historic
climatology and compared to the Global Agro-Ecological Zones, an existing model of irrigation need.
Second, the irrigation need computed for the United States is compared to survey data from the United
States Department of Agriculture. For both evaluations, CLM-AG results are comparable to either the
model results or the surveyed data.
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