Aerosol properties over the Indo-Gangetic Plain: A mesoscale perspective from the TIGERZ experiment

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dc.contributor.authorGiles, David M.
dc.contributor.authorHolben, Brent N.
dc.contributor.authorTripathi, Sachchida N.
dc.contributor.authorEck, Thomas
dc.contributor.authorNewcomb, W. Wayne
dc.contributor.authorSlutsker, Ilya
dc.contributor.authorDickerson, Russell R.
dc.contributor.authorThompson, Anne M.
dc.contributor.authorMattoo, Shana
dc.contributor.authorWang, Sheng-Hsiang
dc.contributor.authorSingh, Remesh P.
dc.contributor.authorSinyuk, Aliaksandr
dc.contributor.authorSchafer, Joel S.
dc.date.accessioned2024-04-29T17:01:37Z
dc.date.available2024-04-29T17:01:37Z
dc.date.issued2011-09-20
dc.description.abstractHigh 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 (26.51°N, 80.23°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 km2 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 ?10–20% 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 ? 0) flags were biased high with respect to TIGERZ IOP area-averaged measurements. MODIS AOD retrievals with QA ? 0 had moderate correlation (R2 = 0.52–0.69) 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.
dc.description.sponsorshipThe NASA AERONET project was supported by Michael D. King, who retired in 2008 from the NASA EOS project office, and by Hal B. Maring, Radiation Sciences Program, NASA Headquarters. The authors would like thank all of the more than 30 participants and collaborators in the NASA/GSFC TIGERZ campaign effort, including many Indian researchers and graduate students as well as other national and international agencies that provided personnel and equipment to perform the study. The authors thank the AERONET team for calibrating and maintaining instrumentation and processing these data. The authors would like to recognize Harish Vishwakarma at IIT?Kanpur for field support during TIGERZ and continued support of the long?term Kanpur AERONET site. The authors gratefully acknowledge the NOAA Air Resources Laboratory (ARL) for providing data from the HYSPLIT transport and dispersion model and/or READY website (http://www.arl.noaa. gov/ready.php) used in this publication. The authors thank Jeffrey Reid and two anonymous reviewers for their constructive comments on an earlier version of the manuscript. Furthermore, the authors recognize with great sadness their deceased coauthor Wilber Wayne Newcomb for his major contributions to the TIGERZ campaign and AERONET.
dc.description.urihttps://onlinelibrary.wiley.com/doi/abs/10.1029/2011JD015809
dc.format.extent19 pages
dc.genrejournal articles
dc.identifierdoi:10.13016/m2xsvq-h0ua
dc.identifier.citationGiles, David M., Brent N. Holben, Sachchida N. Tripathi, Thomas F. Eck, W. Wayne Newcomb, Ilya Slutsker, Russell R. Dickerson, et al. “Aerosol Properties over the Indo-Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment.” Journal of Geophysical Research: Atmospheres 116, no. D18 (2011). https://doi.org/10.1029/2011JD015809.
dc.identifier.urihttps://doi.org/10.1029/2011JD015809
dc.identifier.urihttp://hdl.handle.net/11603/33447
dc.language.isoen_US
dc.publisherAGU
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC GESTAR II
dc.relation.ispartofUMBC Faculty collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
dc.rightsPublic Domain
dc.rights.urihttps://creativecommons.org/publicdomain/mark/1.0/
dc.subjectAERONET
dc.subjectAerosols
dc.subjectIndia
dc.subjectMODIS
dc.subjectTIGERZ
dc.titleAerosol properties over the Indo-Gangetic Plain: A mesoscale perspective from the TIGERZ experiment
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0001-9801-1610

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