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DOI	10.5194/acp-21-11669-2021
	Estimating radiative forcing efficiency of dust aerosol based on direct satellite observations: Case studies over the Sahara and Taklimakan Desert
	Tian L.; Chen L.; Zhang P.; Bi L.
发表日期	2021
ISSN	1680-7316
起始页码	11669
结束页码	11687
卷号	21 期号:15
英文摘要	The direct radiative forcing efficiency of dust aerosol (DRFEdust) is an important indicator to measure the climate effect of dust. The DRFEdust is determined by the microphysical properties of dust, which vary with dust source regions. However, there are only sparse in situ measurements of them, such as the distribution of the dust aerosol particle size and the complex refractive index in the main dust source regions. Furthermore, recent studies have shown that the non-spherical effect of the dust particle is not negligible. The DRFEdust is often evaluated by estimating given microphysical properties of the dust aerosols in the radiative transfer model (RTM). However, considerable uncertainties exist due to the complex and variable dust properties, including the complex refractive index and the shape of the dust. The DRFEdust over the Taklimakan Desert and Sahara is derived from the satellite observations in this paper. The advantage of the proposed satellite-based method is that there is no need to consider the microphysical properties of the dust aerosols in estimating the DRFEdust. For comparison, the observed DRFEdust is compared with that simulated by the RTM. The differences in the dust microphysical properties in these two regions and their impacts on DRFEdust are analyzed. The DRFEdust derived from the satellite observation is -39.6±10.0g Wg m-2τ-1 in March 2019 over Tamanrasset in the Sahara and -48.6±13.7g Wg m-2τ-1 in April 2019 over Kashi in the Taklimakan Desert. According to the analyses of their microphysical properties and optical properties, the dust aerosols from the Taklimakan Desert (Kashi) scatter strongly. The RTM-simulated results (-41.5 to -47.4g Wg m-2τ-1 over Kashi and -32.2 to -44.3g Wg m-2τ-1 over Tamanrasset) are in good agreement with the results estimated by satellite observations. According to previous studies, the results in this paper are proven to be reasonable and reliable. The results also show that the microphysical properties of the dust can significantly influence the DRFEdust. The satellite-derived results can represent the influence of the dust microphysical properties on the DRFEdust, which can also validate the direct radiative effect of the dust aerosol and the DRFEdust derived from the numerical model more directly. © Author(s) 2021.
语种	英语
scopus关键词	aerosol; climate effect; dust; estimation method; particle size; radiative forcing; refractive index; satellite data; China; Sahara; Taklimakan Desert; Xinjiang Uygur; Indicator indicator
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246680
作者单位	Nanjing University of Information Science and Technology, Nanjing, China; Chinese Academy of Meteorological Sciences, Beijing, China; National Satellite Meteorological Center, China Meteorological Administration, Beijing, China; Innovation Center for FengYun Meteorological Satellite, China Meteorological Administration, Beijing, China; Department of Atmospheric Sciences, School of Earth Sciences, Zhejiang University, Hangzhou, China
推荐引用方式 GB/T 7714	Tian L.,Chen L.,Zhang P.,et al. Estimating radiative forcing efficiency of dust aerosol based on direct satellite observations: Case studies over the Sahara and Taklimakan Desert[J],2021,21(15).
APA	Tian L.,Chen L.,Zhang P.,&Bi L..(2021).Estimating radiative forcing efficiency of dust aerosol based on direct satellite observations: Case studies over the Sahara and Taklimakan Desert.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(15).
MLA	Tian L.,et al."Estimating radiative forcing efficiency of dust aerosol based on direct satellite observations: Case studies over the Sahara and Taklimakan Desert".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.15(2021).