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Direct Radiative Effects of Dust aerosols over Northwest China Revealed by Satellite-Derived aerosol three-dimensional distribution

引用

Journal of Meteorological Research 2022年第5期36卷 767-778页

作者： Rui JIA Yuzhi LIU Yan LI Jun LI Xiaolin HU Ronglu GAO Yunfei TIAN Yanling SUN Nannan MU Minfen ZHAO Collaborative Innovation Center for Western Ecological Safety Lanzhou UniversityLanzhou 7300002 Zibo Meteorological Bureau Zibo 2550003 Shandong Meteorological Service Center Jinan 250000

Northwest China is recognized as a main source and a major transport channel of dust aerosols in East *** a fragile ecological environment,this region is quite sensitive to global climate *** on the satellite-derived aerosol three-dimensional distribution,the direct radiative effects of dust aerosols over Northwest China are *** over Northwest China are mainly distributed in the Tarim Basin,Junggar Basin,Gobi Desert,and Loess *** aerosol extinction coefficients are greater than 0.36 km-1 over the Tarim Basin and 0.16 km^(-1) over the Gobi Desert and Loess Plateau,decreasing with *** over Northwest China are mainly composed of pure dust and polluted *** dust aerosols can modify the horizontal temperature gradient,vertical thermodynamic structure,and diurnal temperature range by absorbing and scattering shortwave radiation and emitting longwave *** the column atmosphere,the radiative effect of dust aerosols shows heating effect of approximately 0.3 K day^(-1) during the daytime and cooling effect of approximately-0.4 K day^(-1) at *** the vertical direction,dust aerosols can heat up the lower atmosphere(0.5–1.5 K day^(-1))and cool down the upper atmosphere(about-1.0 K day^(-1))during the daytime,while they cool down the lower atmosphere(-3 to-1.5 K day^(-1))and heat up the upper atmosphere(1–1.5 K day^(-1))at *** are also significant lateral and vertical variations in the dust radiative effects corresponding to their spatial *** study provides some scientific basis for reducing uncertainty in the investigation of aerosol radiative effects and provides observation evidence for simulation studies.

关键词： aerosol three-dimensional distribution direct radiative effect Northwest China

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