气候变化领域集成服务门户(CCPortal): All-Sky Aerosol Direct Radiative Effects at the ARM SGP Site

CCPortal

DOI	10.1029/2021JD034933
	All-Sky Aerosol Direct Radiative Effects at the ARM SGP Site
	Balmes K.A.; Fu Q.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	All-sky aerosol direct radiative effect (DRE) was estimated for the first time at the Atmospheric Radiation Measurement Southern Great Plains site using multiyear ground-based observations. The NASA Langley Fu-Liou radiation model was employed. Observed inputs for the radiation model include aerosol and cloud vertical extinction profile from Raman lidar; spectral aerosol optical depth, single-scattering albedo, and asymmetry factor from Aerosol Robotic Network; cloud water content profiles from radars; temperature and water vapor profiles from radiosondes; and surface shortwave spectral albedo from radiometers. A cloudy-sky radiative closure experiment was performed. The relative mean differences between modeled and observed surface downwelling shortwave total fluxes were 6% (7%) for transparent (opaque) cloudy-skies. The estimated annual mean all-sky aerosol DRE is −2.13 (Formula presented.) 0.54 W m−2 at the top of atmosphere (TOA) and −5.95 (Formula presented.) 0.87 W m−2 at the surface, compared to −3.00 (Formula presented.) 0.58 W m−2 and −6.85 (Formula presented.) 1.00 W m−2, respectively, under clear-sky conditions. The seasonal cycle of all-sky aerosol DRE is similar to that of the clear-sky, except with secondary influences of the clouds: The cloud radiative effect is strongest (most negative) in the spring, which reduces the all-sky aerosol DRE. The relative uncertainties in all-sky aerosol DRE due to measurement errors are generally comparable to those in clear-sky conditions except for the aerosol single-scattering albedo. The TOA all-sky aerosol DRE relative uncertainty due to aerosol single-scattering albedo uncertainty is larger than that in clear-sky, leading to a larger total relative uncertainty. The measurement errors in cloud properties have small effects on the all-sky aerosol DRE. © 2021. American Geophysical Union. All Rights Reserved.
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237054
作者单位	Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO, United States; NOAA Global Monitoring Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Balmes K.A.,Fu Q.. All-Sky Aerosol Direct Radiative Effects at the ARM SGP Site[J],2021,126(17).
APA	Balmes K.A.,&Fu Q..(2021).All-Sky Aerosol Direct Radiative Effects at the ARM SGP Site.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Balmes K.A.,et al."All-Sky Aerosol Direct Radiative Effects at the ARM SGP Site".Journal of Geophysical Research: Atmospheres 126.17(2021).