气候变化领域集成服务门户(CCPortal): A study on the propagation of surface polarization errors to the top of atmosphere

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DOI	10.1016/j.atmosenv.2021.118240
	A study on the propagation of surface polarization errors to the top of atmosphere
	Chen W.; Zhu Y.; Zhao H.; Tian H.; Peltoniemi J.; Yang B.
发表日期	2021
ISSN	1352-2310
卷号	248
英文摘要	Light scattered by the surface–atmosphere system is partially polarized and provides useful information about aerosols and the underlying surface as polarized signals are sensitive to angular information about aerosols. To fully utilize this information, separating polarization signals of the atmosphere and surface by using the bidirectional polarized distribution function (BPDF) is necessary. However, although several BPDF models have been developed, the effects of the uncertainties of these models on the top-of-the-atmosphere (TOA) have not been fully investigated. In this study, we utilize the newly released POLarization and Directionality of the Earth's Reflectances (POLDER) dataset as a measured surface polarized reflectance dataset to parameterize the six currently used BPDF models. The measured and modeled surface polarized reflectances are used as inputs to vector radiative transfer models by statistical aggregating schemes considering all possible POLDER geometries. The root mean square errors between the measured and modeled polarized reflectances at the TOA decreased to 60–75% of the root mean square errors between the measured and modeled polarized reflectances at the surface and further decreased to a relatively low level (20%–30%) when the aerosol optical depth (AOD) increased. The BPDF uncertainty mainly affects the aerosol property retrievals mainly at low aerosol loadings. However, the accuracy of the surface BPDF required to obtain a sufficiently accurate retrieval at small AODs is still unknown. This study provides further insights that are valuable for understanding the coupling effect of the surface and atmosphere and important methods and information for retrieval of aerosol properties. © 2021 Elsevier Ltd
语种	英语
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168987
作者单位	College of Geoscience and Surveying Engineering, China University of Mining & Technology, Beijing, 100083, China; Guangxi Engineering Research Center for Small UAV System and Application, Guilin University of Aerospace Technology, Guilin, 541004, China; Finnish Geospatial Research Institute, Geodeetinrinne, Masala, 202330, Finland; College of Electrical and Information Engineering, Hunan University, Changsha, 410082, China
推荐引用方式 GB/T 7714	Chen W.,Zhu Y.,Zhao H.,et al. A study on the propagation of surface polarization errors to the top of atmosphere[J],2021,248.
APA	Chen W.,Zhu Y.,Zhao H.,Tian H.,Peltoniemi J.,&Yang B..(2021).A study on the propagation of surface polarization errors to the top of atmosphere.Atmospheric Environment,248.
MLA	Chen W.,et al."A study on the propagation of surface polarization errors to the top of atmosphere".Atmospheric Environment 248(2021).