Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment
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 c...
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ftchapmanuniv:oai:digitalcommons.chapman.edu:scs_articles-1245 2023-05-15T13:06:37+02:00 Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment Giles, D. M. Holben, B. N. Tripathi, Sachchida N. Eck, Thomas F. Newcomb, W. Wayne Slutsker, Ilya Dickerson, Russell R. Thompson, Anne M. Mattoo, Shana Wang, Sheng-Hsiang Singh, Ramesh P. Sinyuk, Aliaksandyr Schafer, Joel S. 2011-01-01T08:00:00Z application/pdf https://digitalcommons.chapman.edu/scs_articles/244 https://digitalcommons.chapman.edu/cgi/viewcontent.cgi?article=1245&context=scs_articles unknown Chapman University Digital Commons https://digitalcommons.chapman.edu/scs_articles/244 https://digitalcommons.chapman.edu/cgi/viewcontent.cgi?article=1245&context=scs_articles American Geophysical Union Mathematics, Physics, and Computer Science Faculty Articles and Research Resolution Imaging Spectroradiometer Sky Radiance Measurements Optical Depth Black Carbon Northern India Solar-Radiation Air-Pollution Wavelength Dependence Atmospheric Aerosols Seasonal Variability Atmospheric Sciences Environmental Monitoring text 2011 ftchapmanuniv 2022-03-07T13:36:39Z 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 (26.51 degrees N, 80.23 degrees 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 similar to 50 km(2) 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 similar to 0.10 within and downwind of the city, with urban emissions accounting for similar to 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 (R-2 = 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. Text Aerosol Robotic Network Chapman University Digital Commons Indian |
institution |
Open Polar |
collection |
Chapman University Digital Commons |
op_collection_id |
ftchapmanuniv |
language |
unknown |
topic |
Resolution Imaging Spectroradiometer Sky Radiance Measurements Optical Depth Black Carbon Northern India Solar-Radiation Air-Pollution Wavelength Dependence Atmospheric Aerosols Seasonal Variability Atmospheric Sciences Environmental Monitoring |
spellingShingle |
Resolution Imaging Spectroradiometer Sky Radiance Measurements Optical Depth Black Carbon Northern India Solar-Radiation Air-Pollution Wavelength Dependence Atmospheric Aerosols Seasonal Variability Atmospheric Sciences Environmental Monitoring Giles, D. M. Holben, B. N. Tripathi, Sachchida N. Eck, Thomas F. Newcomb, W. Wayne Slutsker, Ilya Dickerson, Russell R. Thompson, Anne M. Mattoo, Shana Wang, Sheng-Hsiang Singh, Ramesh P. Sinyuk, Aliaksandyr Schafer, Joel S. Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment |
topic_facet |
Resolution Imaging Spectroradiometer Sky Radiance Measurements Optical Depth Black Carbon Northern India Solar-Radiation Air-Pollution Wavelength Dependence Atmospheric Aerosols Seasonal Variability Atmospheric Sciences Environmental Monitoring |
description |
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 (26.51 degrees N, 80.23 degrees 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 similar to 50 km(2) 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 similar to 0.10 within and downwind of the city, with urban emissions accounting for similar to 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 (R-2 = 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. |
format |
Text |
author |
Giles, D. M. Holben, B. N. Tripathi, Sachchida N. Eck, Thomas F. Newcomb, W. Wayne Slutsker, Ilya Dickerson, Russell R. Thompson, Anne M. Mattoo, Shana Wang, Sheng-Hsiang Singh, Ramesh P. Sinyuk, Aliaksandyr Schafer, Joel S. |
author_facet |
Giles, D. M. Holben, B. N. Tripathi, Sachchida N. Eck, Thomas F. Newcomb, W. Wayne Slutsker, Ilya Dickerson, Russell R. Thompson, Anne M. Mattoo, Shana Wang, Sheng-Hsiang Singh, Ramesh P. Sinyuk, Aliaksandyr Schafer, Joel S. |
author_sort |
Giles, D. M. |
title |
Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment |
title_short |
Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment |
title_full |
Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment |
title_fullStr |
Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment |
title_full_unstemmed |
Aerosol Properties Over the Indo‐Gangetic Plain: A Mesoscale Perspective from the TIGERZ Experiment |
title_sort |
aerosol properties over the indo‐gangetic plain: a mesoscale perspective from the tigerz experiment |
publisher |
Chapman University Digital Commons |
publishDate |
2011 |
url |
https://digitalcommons.chapman.edu/scs_articles/244 https://digitalcommons.chapman.edu/cgi/viewcontent.cgi?article=1245&context=scs_articles |
geographic |
Indian |
geographic_facet |
Indian |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
Mathematics, Physics, and Computer Science Faculty Articles and Research |
op_relation |
https://digitalcommons.chapman.edu/scs_articles/244 https://digitalcommons.chapman.edu/cgi/viewcontent.cgi?article=1245&context=scs_articles |
op_rights |
American Geophysical Union |
_version_ |
1766013603096297472 |