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Aerosol Properties over the Indo-Gangetic Plain: A Mesoscale Perspective from the TIGERZ ExperimentHigh aerosol loading over the northern Indian subcontinent can result in poor air quality leading to human health consequences and climate perturbations. The international 2008 TIGERZ experiment intensive operational period (IOP) was conducted in the Indo \Gangetic Plain (IGP) around the industrial city of Kanpur (26.51degN, 80.23deg E), India, during the premonsoon (April-June). Aerosol Robotic Network (AERONET) Sun photometers performed frequent measurements of aerosol properties at temporary sites distributed within an area covering 50 sq km around Kanpur to characterize pollution and dust in a region where complex aerosol mixtures and semi \bright surface effects complicate satellite retrieval algorithms. TIGERZ IOP Sun photometers quantified aerosol optical depth (AOD) increases up to 0.10 within and downwind of the city, with urban emissions accounting for 10 C20% of the IGP aerosol loading on deployment days. TIGERZ IOP area \averaged volume size distribution and single scattering albedo retrievals indicated spatially homogeneous, uniformly sized, spectrally absorbing pollution and dust particles. Aerosol absorption and size relationships were used to categorize black carbon and dust as dominant absorbers and to identify a third category in which both black carbon and dust dominate absorption.Moderate Resolution Imaging Spectroradiometer (MODIS) AOD retrievals with the lowest quality assurance (QA > or = 0) flags were biased high with respect to TIGERZ IOP area \averaged measurements. MODIS AOD retrievals with QA 0 had moderate correlation (R(sup 2) = 0.52-69) with the Kanpur AERONET site, whereas retrievals with QA > 0 were limited in number. Mesoscale \distributed Sun photometers quantified temporal and spatial variability of aerosol properties, and these results were used to validate satellite retrievals.
Document ID
20120010528
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Giles, David M.
(Sigma Space Corp. Lanham, MD, United States)
Holben, Brent N.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Tripathi, Sachchida
(Indian Inst. of Tech. Kanpur, India)
Eck, Thomas F.
(Universities Space Research Association Columbia, MD, United States)
Newcomb, W. Wayne
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Slutsker, Ilya
(Sigma Space Corp. Lanham, MD, United States)
Dickerson, Russell R.
(Maryland Univ. College Park, MD, United States)
Thompson, Anne M.
(Pennsylvania State Univ. University Park, PA, United States)
Mattoo, Shana
(Science Systems and Applications, Inc. Lanham, MD, United States)
Wang, Sheng-Hsiang
(National Central Univ. Chung-Li, Taiwan, Province of China)
Singh, Remesh P.
(Chapman Univ. Orange, CA, United States)
Sinyuk, Aliaksandr
(Sigma Space Corp. Lanham, MD, United States)
Schafer, Joel S.
(Sigma Space Corp. Lanham, MD, United States)
Date Acquired
August 26, 2013
Publication Date
September 20, 2011
Publication Information
Publication: Journal of Geophysical Research
Volume: 116
Subject Category
Geophysics
Report/Patent Number
GSFC.JA.00426.2012
Distribution Limits
Public
Copyright
Other

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