气候变化领域集成服务门户(CCPortal): Aerosol Direct Radiative Effect Sensitivity Analysis

CCPortal

DOI	10.1175/JCLI-D-19-0669.1
	Aerosol Direct Radiative Effect Sensitivity Analysis
	Thorsen T.J.; Ferrare R.A.; Kato S.; Winker D.M.
发表日期	2020
ISSN	0894-8755
起始页码	6119
结束页码	6139
卷号	33 期号:14
英文摘要	Both to reconcile the large range in satellite-based estimates of the aerosol direct radiative effect (DRE) and to optimize the design of future observing systems, this study builds a framework for assessing aerosol DRE uncertainty. Shortwave aerosol DRE radiative kernels (Jacobians) were derived using the MERRA-2 reanalysis data. These radiative kernels give the differential response of the aerosol DRE to perturbations in the aerosol extinction coefficient, aerosol single-scattering albedo, aerosol asymmetry factor, surface albedo, cloud fraction, and cloud optical depth. This comprehensive set of kernels provides a convenient way to consistently and accurately assess the aerosol DRE uncertainties that result from observational or model-based uncertainties. The aerosol DRE kernels were used to test the effect of simplifying the full vertical profile of aerosol scattering properties into column-integrated quantities. This analysis showed that, although the clear-sky aerosol DRE can be had fairly accurately, more significant errors occur for the all-sky DRE. The sensitivity in determining the broadband spectral dependencies of the aerosol scattering properties directly from a limited set of wavelengths was quantified. These spectral dependencies can be reasonably constrained using columnintegrated aerosol scattering properties in the midvisible and near-infrared wavelengths. Separating the aerosol DRE and its kernels by scene type shows that accurate aerosol properties in the clear sky are the most crucial component of the global aerosol DRE. In cloudy skies, determining aerosol properties in the presence of optically thin cloud is more radiatively important than doing so when optically thick cloud is present. © 2020 American Meteorological Society. All rights reserved.
英文关键词	Infrared devices; Sensitivity analysis; Solar radiation; Uncertainty analysis; Aerosol extinction coefficient; Aerosol properties; Aerosol scattering; Aerosol single scattering albedo; Cloud optical depth; Differential response; Near-infrared wavelength; Spectral dependency; Aerosols; aerosol; albedo; cloud cover; estimation method; optical depth; radiative forcing; satellite data; sensitivity analysis; vertical profile
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171222
作者单位	NASA Langley Research Center, Hampton, VA, United States
推荐引用方式 GB/T 7714	Thorsen T.J.,Ferrare R.A.,Kato S.,et al. Aerosol Direct Radiative Effect Sensitivity Analysis[J],2020,33(14).
APA	Thorsen T.J.,Ferrare R.A.,Kato S.,&Winker D.M..(2020).Aerosol Direct Radiative Effect Sensitivity Analysis.Journal of Climate,33(14).
MLA	Thorsen T.J.,et al."Aerosol Direct Radiative Effect Sensitivity Analysis".Journal of Climate 33.14(2020).