气候变化领域集成服务门户(CCPortal): The remote sensing of radiative forcing by light-absorbing particles (LAPs) in seasonal snow over northeastern China

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DOI	10.5194/acp-19-9949-2019
	The remote sensing of radiative forcing by light-absorbing particles (LAPs) in seasonal snow over northeastern China
	Pu W.; Cui J.; Shi T.; Zhang X.; He C.; Wang X.
发表日期	2019
ISSN	16807316
起始页码	9949
结束页码	9968
卷号	19 期号:15
英文摘要	Light-absorbing particles (LAPs) deposited on snow can decrease snow albedo and affect climate through snow-albedo radiative forcing. In this study, we use MODIS observations combined with a snow-albedo model (SNICAR - Snow, Ice, and Aerosol Radiative) and a radiative transfer model (SBDART - Santa Barbara DISORT Atmospheric Radiative Transfer) to retrieve the instantaneous spectrally integrated radiative forcing at the surface by LAPs in snow (RFLAPsMODIS) under clear-sky conditions at the time of MODIS Aqua overpass across northeastern China (NEC) in January-February from 2003 to 2017. (RFLAPsMODIS) presents distinct spatial variability, with the minimum (22.3 W m-2) in western NEC and the maximum (64.6 W m-2) near industrial areas in central NEC. The regional mean RFLAPsMODIS ∼ 45.1 ± 6.8 W m-2 in NEC. The positive (negative) uncertainties of retrieved RFLAPsMODIS. We attribute the variations of radiative forcing based on remote sensing and find that the spatial variance of RFLAPsMODIS in NEC is 74.6 % due to LAPs and 21.2 % and 4.2 % due to snow grain size and solar zenith angle. Furthermore, based on multiple linear regression, the BC dry and wet deposition and snowfall could explain 84 % of the spatial variance of LAP contents, which confirms the reasonability of the spatial patterns of retrieved RFLAPsMODIS using in situ radiative forcing estimates. We find that the biases in RFLAPsMODIS are negatively correlated with LAP concentrations and range from ∼ 5 % to ∼ 350 % in NEC. © Author(s) 2019.
语种	英语
scopus关键词	albedo; Aqua (satellite); MODIS; radiative forcing; radiative transfer; remote sensing; snow cover; spatial variation; China
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/144228
作者单位	Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China; Institute of Surface-Earth System Science, Tianjin University, Tianjin, 300072, China; Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun, 130102, China; National Center for Atmospheric Research, Boulder, CO 80301, United States
推荐引用方式 GB/T 7714	Pu W.,Cui J.,Shi T.,et al. The remote sensing of radiative forcing by light-absorbing particles (LAPs) in seasonal snow over northeastern China[J],2019,19(15).
APA	Pu W.,Cui J.,Shi T.,Zhang X.,He C.,&Wang X..(2019).The remote sensing of radiative forcing by light-absorbing particles (LAPs) in seasonal snow over northeastern China.Atmospheric Chemistry and Physics,19(15).
MLA	Pu W.,et al."The remote sensing of radiative forcing by light-absorbing particles (LAPs) in seasonal snow over northeastern China".Atmospheric Chemistry and Physics 19.15(2019).