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 inYing yong qi xiang xue bao = Quarterly journal of applied meteorology Vol. 35; no. 4; p. 400
Main Authors Chunhong, Zhou, Xiaoqin, Rao, Li, Sheng, Jian, Zhang, Jianyan, Lu, Jian, Lin, Jiangkai, Hu, Bihui, Zhang, Ran, Xu
Format Journal Article
LanguageChinese
Published Beijing China Meteorological Press 01.01.2024
Subjects
Adaptive sampling
Atmospheric particulates
Data sampling
Desertification
Deserts
Disasters
Dust
Dust emission
Dust storms
Emission
Emissions
Extreme values
Extreme weather
False alarms
Mean winds
Natural disasters
Numerical forecasting
Sand
Size distribution
Soil properties
Soil texture
Surface layers
Texture
Wind erosion
Wind speed
Mongolia
China
East Asia
Central Asia
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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
ISSN:1001-7313