NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Assessment of Aerosol Optical Property and Radiative Effect for the Layer Decoupling Cases over the Northern South China Sea During the 7-SEAS Dongsha ExperimentThe aerosol radiative effect can be modulated by the vertical distribution and optical properties of aerosols, particularly when aerosol layers are decoupled. Direct aerosol radiative effects over the northern South China Sea (SCS) were assessed by incorporating an observed data set of aerosol optical properties obtained from the Seven South East Asian Studies (7-SEAS)/Dongsha Experiment into a radiative transfer model. Aerosol optical properties for a two-layer structure of aerosol transport were estimated. In the radiative transfer calculations, aerosol variability (i.e., diversity of source region, aerosol type, and vertical distribution) for the complex aerosol environment was also carefully quantified. The column-integrated aerosol optical depth (AOD) at 500nm was 0.1-0.3 for near-surface aerosols and increased 1-5 times in presence of upper layer biomass-burning aerosols. A case study showed the strong aerosol absorption (single-scattering albedo (omega) approx. = 0.92 at 440nm wavelength) exhibited by the upper layer when associated with predominantly biomass-burning aerosols, and the omega (approx. = 0.95) of near-surface aerosols was greater than that of the upper layer aerosols because of the presence of mixed type aerosols. The presence of upper level aerosol transport could enhance the radiative efficiency at the surface (i.e., cooling) and lower atmosphere (i.e., heating) by up to -13.7 and +9.6W/sq m2 per AOD, respectively. Such enhancement could potentially modify atmospheric stability, can influence atmospheric circulation, as well as the hydrological cycle over the tropical and low-latitude marginal northern SCS.
Document ID
20170003430
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Pani, Shantau Kumar (National Central Univ. Taoyuan, Taiwan, Province of China)
Wang, Sheng-Hsiang (National Central Univ. Taoyuan, Taiwan, Province of China)
Lin, Neng-Huei (Chiang Mai Univ. Thailand)
Tsay, Si-Chee (NASA Goddard Space Flight Center Greenbelt, MD United States)
Lolli, Simone (Maryland Univ. Baltimore County Baltimore, MD, United States)
Chuang, Ming-Tung (National Central Univ. Taoyuan, Taiwan, Province of China)
Lee, Chung-Te (National Central Univ. Taoyuan, Taiwan, Province of China)
Chantara, Somporn (Chiang Mai Univ. Thailand)
Yu, Jin-Yi (California Univ. Irvine, CA, United States)
Date Acquired
April 14, 2017
Publication Date
May 12, 2016
Publication Information
Publication: Journal of Geophysical Research: Atmospheres
Volume: 121
Issue: 9
ISSN: 2169-897X
Subject Category
Earth Resources and Remote Sensing
Report/Patent Number
GSFC-E-DAA-TN41288
Funding Number(s)
CONTRACT_GRANT: NNX15AT34A
Distribution Limits
Public
Copyright
Other
Keywords
biomass burning
aerosols
remote sensing