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Impacts of land use/cover classification accuracy on regional climate simulations

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Title Impacts of land use/cover classification accuracy on regional climate simulations
 
Creator Jianjun, Ge
Jiaguo, Qi
Lofgren, B.M.
Moore, N.
Torbick, N.M.
Olson, J.M.
 
Subject CLIMATIC CHANGE
LAND USE
 
Description Land use/cover change has been recognized as a key component in global change. Various land cover data sets, including historically reconstructed, recently observed, and future projected, have been used in numerous climate modeling studies at regional to global scales. However, little attention has been paid to the effect of land cover classification accuracy on climate simulations, though accuracy assessment has become a routine procedure in land cover production community. In this study, we analyzed the behavior of simulated precipitation in the Regional Atmospheric Modeling System (RAMS) over a range of simulated classification accuracies over a 3 month period. This study found that land cover accuracy under 80% had a strong effect on precipitation especially when the land surface had a greater control of the atmosphere. This effect became stronger as the accuracy decreased. As shown in three follow-on experiments, the effect was further influenced by model parameterizations such as convection schemes and interior nudging, which can mitigate the strength of surface boundary forcings. In reality, land cover accuracy rarely obtains the commonly recommended 85% target. Its effect on climate simulations should therefore be considered, especially when historically reconstructed and future projected land covers are employed.
 
Date 2010-08-05T07:05:06Z
2010-08-05T07:05:06Z
2007-03-10
 
Type Journal Article
 
Identifier Jiaguo Qi; Lofgren, B.M.; Moore, N.; Torbick, N.; Olson, J.M. 2007. Impacts of land use/cover classification accuracy on regional climate simulations. Journal of Geophysical Research—Atmosphere 112(D5):D05107.
http://hdl.handle.net/10568/2176
 
Language en
 
Source Journal of Geophysical Research—Atmosphere