气候变化领域集成服务门户(CCPortal): Constraining the vertical distribution of coastal dust aerosol using OCO-2 O2 A-band measurements

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DOI	10.1016/j.rse.2019.111494
	Constraining the vertical distribution of coastal dust aerosol using OCO-2 O2 A-band measurements
	Zeng Z.-C.; Chen S.; Natraj V.; Le T.; Xu F.; Merrelli A.; Crisp D.; Sander S.P.; Yung Y.L.
发表日期	2020
ISSN	00344257
卷号	236
英文摘要	Quantifying the vertical distribution of atmospheric aerosols is crucial for estimating their impact on the Earth's energy budget and climate, improving forecast of air pollution in cities, and reducing biases in the retrieval of greenhouse gases (GHGs) from space. However, to date, passive remote sensing measurements have provided limited information about aerosol extinction profiles. In this study, we propose the use of a spectral sorting approach to constrain the aerosol vertical structure using spectra of reflected sunlight absorption within the molecular oxygen (O2) A-band collected by the Orbiting Carbon Observatory-2 (OCO-2). The effectiveness of the approach is evaluated using spectra acquired over the western Sahara coast by comparing the aerosol profile retrievals with lidar measurements from the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP). Using a radiative transfer model to simulate OCO-2 measurements, we found that high-resolution O2 A-band measurements have high sensitivity to aerosol optical depth (AOD) and aerosol layer height (ALH). Retrieved estimates of AOD and ALH based on a look up table technique show good agreement with CALIPSO measurements, with correlation coefficients of 0.65 and 0.53, respectively. The strength of the proposed spectral sorting technique lies in its ability to identify spectral channels with high sensitivity to AOD and ALH and extract the associated information from the observed radiance in a straightforward manner. The proposed approach has the potential to enable future passive remote sensing missions to map the aerosol vertical distribution on a global scale. © 2019 Elsevier Inc.
英文关键词	Aerosol profiling; CALIPSO; Dust; O2 A-band; OCO-2
语种	英语
scopus关键词	Atmospheric aerosols; Budget control; Dust; Greenhouse gases; Molecular oxygen; Optical radar; Orbits; Radiative transfer; Remote sensing; Space optics; Table lookup; Aerosol vertical structure; CALIPSO; Cloud-aerosol lidar and infrared pathfinder satellite observations; Cloud-aerosol lidar with orthogonal polarizations; Correlation coefficient; O2 A-band; OCO-2; Radiative transfer model; Air pollution; absorption; aerosol; Allan Hills meteorite; atmospheric pollution; CALIPSO; dust; lidar; measurement method; OCO; optical depth; radiative transfer; remote sensing; vertical distribution
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179596
作者单位	University of California, Los Angeles, United States; California Institute of Technology, Pasadena, United States; National University of Singapore, Singapore; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States; Space Science and Engineering Center, University of Wisconsin-Madison, Madison, WI, United States
推荐引用方式 GB/T 7714	Zeng Z.-C.,Chen S.,Natraj V.,et al. Constraining the vertical distribution of coastal dust aerosol using OCO-2 O2 A-band measurements[J],2020,236.
APA	Zeng Z.-C..,Chen S..,Natraj V..,Le T..,Xu F..,...&Yung Y.L..(2020).Constraining the vertical distribution of coastal dust aerosol using OCO-2 O2 A-band measurements.Remote Sensing of Environment,236.
MLA	Zeng Z.-C.,et al."Constraining the vertical distribution of coastal dust aerosol using OCO-2 O2 A-band measurements".Remote Sensing of Environment 236(2020).