Journal article
Shortwave direct radiative forcing of Saharan dust aerosols over the Atlantic Ocean
International journal of remote sensing, Vol.24(24), pp.5147-5160
01/01/2003
DOI: 10.1080/0143116031000114824
Abstract
Using collocated Visible and Infrared Scanner (VIRS) and Clouds and the Earth's Radiant Energy Budget Scanner (CERES) data on board the Tropical Rainfall Measuring Mission (TRMM) satellite, the instantaneous Shortwave Aerosol Radiative Forcing (SWARF) and daytime diurnally averaged SWARF at the top-of-atmosphere (TOA) are estimated for Saharan dust over the Atlantic Ocean (10° N-25°N, 30° W-15° W) for July 1998. A combination of reflectance thresholds, along with infrared spatial coherence techniques, are used to separate dust aerosols from clouds. Using Mie and Discrete Ordinate Radiative Transfer (DISORT) calculations and the VIRS channel 1 reflectance, dust optical thickness (τ) is retrieved. The average instantaneous direct SWARF of dust aerosols per unit τ is −50 W m
−2
. The daytime diurnally averaged SWARF of dust aerosols is −15.2±10.9 W m
−2
for a mean z of 0.79±0.39. This study demonstrates that the synergistic use of instruments from different parts of the electromagnetic spectrum can be used to study the radiative effects of dust aerosols. This study is also among the first to estimate the diurnal SWARF of dust aerosols using satellite sensor data.
Details
- Title: Subtitle
- Shortwave direct radiative forcing of Saharan dust aerosols over the Atlantic Ocean
- Creators
- Xiong Liu - Department of Atmospheric Sciences , University of Alabama in HuntsvilleJun Wang - Department of Atmospheric Sciences , University of Alabama in HuntsvilleSundar A Christopher - Department of Atmospheric Sciences , University of Alabama in Huntsville
- Resource Type
- Journal article
- Publication Details
- International journal of remote sensing, Vol.24(24), pp.5147-5160
- Publisher
- Taylor & Francis Group
- DOI
- 10.1080/0143116031000114824
- ISSN
- 0143-1161
- eISSN
- 1366-5901
- Language
- English
- Date published
- 01/01/2003
- Academic Unit
- Physics and Astronomy; Civil and Environmental Engineering; Chemical and Biochemical Engineering; Electrical and Computer Engineering
- Record Identifier
- 9984104913102771
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