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

David M. Giles, Brent N. Holben, Sachchida N. Tripathi, Thomas F. Eck, W. Wayne Newcomb, Ilya Slutsker, Russell R. Dickerson, Anne M. Thompson, Shana Mattoo, Sheng Hsiang Wang, Remesh P. Singh, Aliaksandr Sinyuk, Joel S. Schafer

Research output: Contribution to journalArticle

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Abstract

High 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 (26.51N, 80.23E), 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.

Original languageEnglish (US)
Article numberD18203
JournalJournal of Geophysical Research Atmospheres
Volume116
Issue number18
DOIs
StatePublished - Jan 1 2011

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aerosol property
aerosols
Aerosols
plains
aerosol
retrieval
photometer
optical depth
dust
experiment
photometers
Experiments
Photometers
Dust
black carbon
MODIS
Sun
optical thickness
Soot
sun

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Giles, D. M., Holben, B. N., Tripathi, S. N., Eck, T. F., Newcomb, W. W., Slutsker, I., ... Schafer, J. S. (2011). Aerosol properties over the Indo-Gangetic Plain: A mesoscale perspective from the TIGERZ experiment. Journal of Geophysical Research Atmospheres, 116(18), [D18203]. https://doi.org/10.1029/2011JD015809
Giles, David M. ; Holben, Brent N. ; Tripathi, Sachchida N. ; Eck, Thomas F. ; Newcomb, W. Wayne ; Slutsker, Ilya ; Dickerson, Russell R. ; Thompson, Anne M. ; Mattoo, Shana ; Wang, Sheng Hsiang ; Singh, Remesh P. ; Sinyuk, Aliaksandr ; Schafer, Joel S. / Aerosol properties over the Indo-Gangetic Plain : A mesoscale perspective from the TIGERZ experiment. In: Journal of Geophysical Research Atmospheres. 2011 ; Vol. 116, No. 18.
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abstract = "High 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 (26.51N, 80.23E), 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.",
author = "Giles, {David M.} and Holben, {Brent N.} and Tripathi, {Sachchida N.} and Eck, {Thomas F.} and Newcomb, {W. Wayne} and Ilya Slutsker and Dickerson, {Russell R.} and Thompson, {Anne M.} and Shana Mattoo and Wang, {Sheng Hsiang} and Singh, {Remesh P.} and Aliaksandr Sinyuk and Schafer, {Joel S.}",
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Giles, DM, Holben, BN, Tripathi, SN, Eck, TF, Newcomb, WW, Slutsker, I, Dickerson, RR, Thompson, AM, Mattoo, S, Wang, SH, Singh, RP, Sinyuk, A & Schafer, JS 2011, 'Aerosol properties over the Indo-Gangetic Plain: A mesoscale perspective from the TIGERZ experiment', Journal of Geophysical Research Atmospheres, vol. 116, no. 18, D18203. https://doi.org/10.1029/2011JD015809

Aerosol properties over the Indo-Gangetic Plain : A mesoscale perspective from the TIGERZ experiment. / Giles, David M.; Holben, Brent N.; Tripathi, Sachchida N.; Eck, Thomas F.; Newcomb, W. Wayne; Slutsker, Ilya; Dickerson, Russell R.; Thompson, Anne M.; Mattoo, Shana; Wang, Sheng Hsiang; Singh, Remesh P.; Sinyuk, Aliaksandr; Schafer, Joel S.

In: Journal of Geophysical Research Atmospheres, Vol. 116, No. 18, D18203, 01.01.2011.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Aerosol properties over the Indo-Gangetic Plain

T2 - A mesoscale perspective from the TIGERZ experiment

AU - Giles, David M.

AU - Holben, Brent N.

AU - Tripathi, Sachchida N.

AU - Eck, Thomas F.

AU - Newcomb, W. Wayne

AU - Slutsker, Ilya

AU - Dickerson, Russell R.

AU - Thompson, Anne M.

AU - Mattoo, Shana

AU - Wang, Sheng Hsiang

AU - Singh, Remesh P.

AU - Sinyuk, Aliaksandr

AU - Schafer, Joel S.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - High 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 (26.51N, 80.23E), 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.

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