Application of Scale-adaptive Dust Emission Scheme to CMA-CUACE/Dust
Sand and dust storms are significant natural disasters which affect East Asia and China in spring, occurring from March to May. Performances of CMA-CUACE/Dust, an operational Asian sand and dust storm numerical forecasting system of CMA since 2006, are analyzed. It's found that the model overes...
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Published in | Ying yong qi xiang xue bao = Quarterly journal of applied meteorology Vol. 35; no. 4; p. 400 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | Chinese |
Published |
Beijing
China Meteorological Press
01.01.2024
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Subjects | |
Online Access | Get full text |
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Summary: | Sand and dust storms are significant natural disasters which affect East Asia and China in spring, occurring from March to May. Performances of CMA-CUACE/Dust, an operational Asian sand and dust storm numerical forecasting system of CMA since 2006, are analyzed. It's found that the model overestimates in Central Asia, underestimates in northern Mongolia, and diffuses too quickly in downwind areas far away from the source area, especially in Northern China, Korean Peninsula and Japan, resulting in low peak values or less lingering time there for very extreme sand and dust storm events. A scale-adaptive dust emission scheme is applied by resolving the mean wind speed of the model grid into sectional one which can account for values larger than the mean value by Weibull integration function. This significant aspect is crucial because the dust emission is the third power of the wind in the dust emission scheme. New wind erosion database is also adopted which consists of the updated desertification by using twenty |
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ISSN: | 1001-7313 |