气候变化领域集成服务门户(CCPortal): Aerosol profiling using radiometric and polarimetric spectral measurements in the O2 near infrared bands: Estimation of information content and measurement uncertainties

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DOI	10.1016/j.rse.2020.112179
	Aerosol profiling using radiometric and polarimetric spectral measurements in the O2 near infrared bands: Estimation of information content and measurement uncertainties
	Choi M.; Sander S.P.; Spurr R.J.D.; Pongetti T.J.; van Harten G.; Drouin B.J.; Diner D.J.; Crisp D.; Eldering A.; Kalashnikova O.V.; Jiang J.H.; Hyon J.J.; Fu D.
发表日期	2021
ISSN	00344257
卷号	253
英文摘要	Characterization of aerosol vertical distribution in the planetary boundary layer (PBL) using passive remote sensing requires advances in the current state of the art. To quantify the performance of various passive sensor designs within a common framework we developed an aerosol climatology of the Los Angeles basin and applied observing system simulation experiments (OSSEs) to estimate the information content retrievable from a variety of sensors measuring reflected near-infrared solar radiation. In addition to simulating current and planned satellite sensors, we also characterize the sensitivity of the California Laboratory for Atmospheric Remote Sensing – Fourier Transform Spectrometer (CLARS-FTS), located at Mt. Wilson (1.67 km above sea level), which is utilized in this work as a testbed for aerosol profiling remote sensing. We estimate the impacts of spectral coverage, radiance and polarization, spectral resolution, signal to noise ratio (SNR), and number of viewing angles on the information content and retrieval uncertainties of aerosol profiles in the PBL. We found that by adding high spectral resolution (full-width half-maximum of 3 cm−1 or better), polarimetric measurements with a SNR of at least 212 to radiance measurements with SNR of 300 for both O2 A and 1∆ bands, the degrees of freedom for signal (DOFS) of a single CLARS-FTS measurement is raised from 2.1 to 2.8. This improvement is sufficient to simultaneously quantify three key parameters: aerosol optical depth, aerosol peak height, and aerosol layer thickness in the PBL. Current satellite-borne instruments (OCO-2, OCO-3, TEMPO, TROPOMI, and EPIC) and planned instruments (TEMPO, MicroCarb, SPEXone, and MAIA), individually provide a DOFS ≤ 2.25, which is insufficient to simultaneously quantify all three aerosol profiling parameters in the PBL. Joint radiometric and polarimetric measurements of the O2 A and B bands with 3 cm−1 spectral resolution, SNR of 500 for radiance and 353 for polarization, acquired at three viewing angles, can provide sufficient sensitivity to retrieve the three aerosol parameters simultaneously. The inclusion of high spectral resolution radiometric and polarimetric measurements reduces the required number of viewing angles, which is advantageous when the multiangular data are acquired with a pointable instrument. In this case a larger number of viewing angles reduces the spatial coverage that can be achieved for a given target. © 2020 Elsevier Inc.
英文关键词	Aerosol profiling; Information content analysis; Oxygen A, B, and 1∆ bands; Planetary boundary layer (PBL); Polarization measurements
语种	英语
scopus关键词	Aerosols; Boundary layers; Degrees of freedom (mechanics); Fourier transform infrared spectroscopy; Infrared devices; Polarimeters; Polarization; Radiometry; Remote sensing; Sea level; Spacecraft instruments; Spectral resolution; Uncertainty analysis; Atmospheric remote sensing; Fourier transform spectrometers; Full width half maximum; High spectral resolution; Measurement uncertainty; Observing system simulation experiments; Planetary boundary layers; Polarimetric measurements; Signal to noise ratio; aerosol composition; boundary layer; near infrared; radiance; radiometric survey; satellite sensor; signal-to-noise ratio; spectral resolution; vertical distribution; California; Los Angeles [California]; United States
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/179032
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, United States; RT Solutions Inc., Cambridge, MA 02138, United States
推荐引用方式 GB/T 7714	Choi M.,Sander S.P.,Spurr R.J.D.,et al. Aerosol profiling using radiometric and polarimetric spectral measurements in the O2 near infrared bands: Estimation of information content and measurement uncertainties[J],2021,253.
APA	Choi M..,Sander S.P..,Spurr R.J.D..,Pongetti T.J..,van Harten G..,...&Fu D..(2021).Aerosol profiling using radiometric and polarimetric spectral measurements in the O2 near infrared bands: Estimation of information content and measurement uncertainties.Remote Sensing of Environment,253.
MLA	Choi M.,et al."Aerosol profiling using radiometric and polarimetric spectral measurements in the O2 near infrared bands: Estimation of information content and measurement uncertainties".Remote Sensing of Environment 253(2021).