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Adding the impacts of biological crusts on sand and dust storm emission in Asia

Advances in Climate Change Research 2023年第3期14卷 406-415页

作者： Jian ZHANG Chun-Hong ZHOU Jian-Yan LU Hong WANG Xiao-Ye ZHANG Key Laboratory for AerosoleCloudePrecipitation of China Meteorological Administration Nanjing University of Information Science&TechnologyNanjing 210044China State Key Laboratory of Severe Weather and Key Laboratory of Atmospheric Chemistry of Chinese Academy of Meteorological Sciences&Institute of Atmospheric Composition Beijing 100081China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China

Although biological crusts(biocrusts)grant stability to dust source areas by inhibiting dust emission,only a few models have explicitly considered their inhibitory effect.In this study,we used the China Meteorological Administration Unified Atmospheric Chemistry Environment/dust model and combined retrieved biocrust information with two biocrust inhibition schemes(roughness length and biocrust strength schemes)to study numerically the inhibitory effect of biocrusts on a strong dust storm that occurred in Central and East Asia on 25−30 Mar.2018.The inhibitory effect of biocrusts on dust emission increased with biocrust coverage.The total dust emission forecasted by the roughness length and biocrust strength schemes was reduced by approximately 56.7%and 47.9%on average,respectively.In downstream sites in China,the surface mass concentrations of PM10 forecasted by the roughness length and biocrust strength schemes decreased by 36%–57%and 24%–41%,respectively.When biocrusts were considered,the forecast for stations near the dust source area considerably improved and that for stations distant from the source area became more reasonable but with larger bias under the combined effects of emission,transport and deposition.

关键词： Biological crust dust emission cuace/dust Roughness length scheme Biocrust strength scheme

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cuace/dust:an Operational SDS Forecasting System for East Asia:

CUACE/Dust:an Operational SDS Forecasting System for East As...

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第三届中日韩气象学术会议

作者： C.H.Zhou~1 S.L.Gong~(2 1) X.Y.Zhang~1 Y.Q.Wang~1 T.Niu~1 H.L.Liu~1 T.L.Zhao~2 Y.Q.Yang~1 Q.Hou~1 ~1Centre for Atmosphere Watch & Services(CAWAS)Chinese Academy of Meteorological Sciences China Meteorological Administration(CMA) Beijing 100081 China ~2Air Quality Research Division Science & Technology Branch Environment Canada 4905 Dufferin Street Toronto Ontario M3H 5T4 Canada

＜正＞cuace/dust,an operational mesoscale sand and dust storm（SDS）forecasting system for East Asia,has been developed by online coupling dust aerosol emission scheme and dust aerosol microphysics onto a meteorological model with MPDATA advection scheme and k-diffusion scheme introduced.The inputs contain meteorology from a CMA operational medium range model T213 and a detailed Northeast Asia soil erosion database.It also includes a 3DVar data assimilation system that uses visibility and dust storm records from weather stations,PM10 data from dust observation network and dust intensity data IDDI retrieved from the Chinese Geostationary Satellite FY-2C and a TS scoring system.For spring 2006, cuace/dust successfully forecasted 29 of the 31 SDS episodes in East Asia.A detailed comparison of the modeling predictions for the March 8-12 episode with surface network observations and lidar measurements revealed a robust forecasting ability of the system.The time series of the forecasted dust concentrations for a number of representative stations for the whole spring 2006 were also evaluated against surface PM 10 monitoring data,showing a very good agreement in terms of the SDS timing and magnitudes at and near the source regions where dust aerosols dominate.For the entire domain forecasts in spring 2006（March 1-May 31）,a TS （thread score）system evaluated the performance of the system against all available observations and rendered an averaged TS value of 0.31 for 24 hr forecasts,0.23 for 48 hr and 72 hr forecasts.

关键词： Sand and dust Storm Forecasting cuace/dust Asia

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cuace/dust及其对东北亚沙尘暴实时业务预报

CUACE/Dust及其对东北亚沙尘暴实时业务预报

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中国气象学会2007年年会

作者：周春红龚山陵张小曳王亚强牛涛刘洪利杨元琴侯青中国气象局大气成分观测与服务中心

亚洲沙尘暴数值预报系统cuace/dust是将含有改进的起沙模式和沙尘气溶胶的微物理过程的气溶胶模式在线耦合到中尺度气象模式中。沙尘气溶胶在大气中的平流输送方案引进了耗散小且正定的MPDATA方案,湍流输送方案则利用气象模式中常用的... 详细信息

亚洲沙尘暴数值预报系统cuace/dust是将含有改进的起沙模式和沙尘气溶胶的微物理过程的气溶胶模式在线耦合到中尺度气象模式中。沙尘气溶胶在大气中的平流输送方案引进了耗散小且正定的MPDATA方案,湍流输送方案则利用气象模式中常用的考虑逆梯度输送的MRF边界层方案改进而来。该预报系统的输入包括全球中期模式T213的气象预报场和沙尘暴数值同化系统SDS-DAS将我国FY-2C卫星遥感的沙尘信息和地面

关键词： cuace/dust 沙尘暴业务数值预报亚洲

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