Aerosol Optical Depth Over India
Tropospheric aerosol optical depth (AOD) over India was simulated by Goddard Earth Observing System (GEOS)-Chem, a global 3-D chemical-transport model, using SMOG (Speciated Multi-pOllutant Generator from Indian Institute of Technology Bombay) and GEOS-Chem (GC) (current inventories used in the GEOS...
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ftindianacasci:oai:repository.ias.ac.in:124339 2023-05-15T13:06:31+02:00 Aerosol Optical Depth Over India David, Liji Mary Ravishankara, A. R. Kodros, John K. Venkataraman, Chandra Sadavarte, Pankaj Pierce, Jeffrey R. Chaliyakunnel, Sreelekha Millet, Dylan B. 2018 http://repository.ias.ac.in/124339/ https://doi.org/10.1002/2017JD027719 unknown John Wiley & Sons, Inc David, Liji Mary Ravishankara, A. R. Kodros, John K. Venkataraman, Chandra Sadavarte, Pankaj Pierce, Jeffrey R. Chaliyakunnel, Sreelekha Millet, Dylan B. (2018) Aerosol Optical Depth Over India Journal of Geophysical Research: Atmospheres, 123 (7). pp. 3688-3703. ISSN 2169-897X QE Geology Article PeerReviewed 2018 ftindianacasci https://doi.org/10.1002/2017JD027719 2021-12-27T14:49:09Z Tropospheric aerosol optical depth (AOD) over India was simulated by Goddard Earth Observing System (GEOS)-Chem, a global 3-D chemical-transport model, using SMOG (Speciated Multi-pOllutant Generator from Indian Institute of Technology Bombay) and GEOS-Chem (GC) (current inventories used in the GEOS-Chem model) inventories for 2012. The simulated AODs were ~80% (SMOG) and 60% (GC) of those measured by the satellites (Moderate Resolution Imaging Spectroradiometer and Multi-angle Imaging SpectroRadiometer). There is no strong seasonal variation in AOD over India. The peak AOD values are observed/simulated during summer. The simulated AOD using SMOG inventory has particulate black and organic carbon AOD higher by a factor ~5 and 3, respectively, compared to GC inventory. The model underpredicted coarse-mode AOD but agreed for fine-mode AOD with Aerosol Robotic Network data. It captured dust only over Western India, which is a desert, and not elsewhere, probably due to inaccurate dust transport and/or noninclusion of other dust sources. The calculated AOD, after dust correction, showed the general features in its observed spatial variation. Highest AOD values were observed over the Indo-Gangetic Plain followed by Central and Southern India with lowest values in Northern India. Transport of aerosols from Indo-Gangetic Plain and Central India into Eastern India, where emissions are low, is significant. The major contributors to total AOD over India are inorganic aerosol (41–64%), organic carbon (14–26%), and dust (7–32%). AOD over most regions of India is a factor of 5 or higher than over the United States. Article in Journal/Newspaper Aerosol Robotic Network Indian Academy of Sciences: Publication of Fellows Bombay ENVELOPE(-60.783,-60.783,-63.900,-63.900) Indian Journal of Geophysical Research: Atmospheres 123 7 3688 3703 |
institution |
Open Polar |
collection |
Indian Academy of Sciences: Publication of Fellows |
op_collection_id |
ftindianacasci |
language |
unknown |
topic |
QE Geology |
spellingShingle |
QE Geology David, Liji Mary Ravishankara, A. R. Kodros, John K. Venkataraman, Chandra Sadavarte, Pankaj Pierce, Jeffrey R. Chaliyakunnel, Sreelekha Millet, Dylan B. Aerosol Optical Depth Over India |
topic_facet |
QE Geology |
description |
Tropospheric aerosol optical depth (AOD) over India was simulated by Goddard Earth Observing System (GEOS)-Chem, a global 3-D chemical-transport model, using SMOG (Speciated Multi-pOllutant Generator from Indian Institute of Technology Bombay) and GEOS-Chem (GC) (current inventories used in the GEOS-Chem model) inventories for 2012. The simulated AODs were ~80% (SMOG) and 60% (GC) of those measured by the satellites (Moderate Resolution Imaging Spectroradiometer and Multi-angle Imaging SpectroRadiometer). There is no strong seasonal variation in AOD over India. The peak AOD values are observed/simulated during summer. The simulated AOD using SMOG inventory has particulate black and organic carbon AOD higher by a factor ~5 and 3, respectively, compared to GC inventory. The model underpredicted coarse-mode AOD but agreed for fine-mode AOD with Aerosol Robotic Network data. It captured dust only over Western India, which is a desert, and not elsewhere, probably due to inaccurate dust transport and/or noninclusion of other dust sources. The calculated AOD, after dust correction, showed the general features in its observed spatial variation. Highest AOD values were observed over the Indo-Gangetic Plain followed by Central and Southern India with lowest values in Northern India. Transport of aerosols from Indo-Gangetic Plain and Central India into Eastern India, where emissions are low, is significant. The major contributors to total AOD over India are inorganic aerosol (41–64%), organic carbon (14–26%), and dust (7–32%). AOD over most regions of India is a factor of 5 or higher than over the United States. |
format |
Article in Journal/Newspaper |
author |
David, Liji Mary Ravishankara, A. R. Kodros, John K. Venkataraman, Chandra Sadavarte, Pankaj Pierce, Jeffrey R. Chaliyakunnel, Sreelekha Millet, Dylan B. |
author_facet |
David, Liji Mary Ravishankara, A. R. Kodros, John K. Venkataraman, Chandra Sadavarte, Pankaj Pierce, Jeffrey R. Chaliyakunnel, Sreelekha Millet, Dylan B. |
author_sort |
David, Liji Mary |
title |
Aerosol Optical Depth Over India |
title_short |
Aerosol Optical Depth Over India |
title_full |
Aerosol Optical Depth Over India |
title_fullStr |
Aerosol Optical Depth Over India |
title_full_unstemmed |
Aerosol Optical Depth Over India |
title_sort |
aerosol optical depth over india |
publisher |
John Wiley & Sons, Inc |
publishDate |
2018 |
url |
http://repository.ias.ac.in/124339/ https://doi.org/10.1002/2017JD027719 |
long_lat |
ENVELOPE(-60.783,-60.783,-63.900,-63.900) |
geographic |
Bombay Indian |
geographic_facet |
Bombay Indian |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_relation |
David, Liji Mary Ravishankara, A. R. Kodros, John K. Venkataraman, Chandra Sadavarte, Pankaj Pierce, Jeffrey R. Chaliyakunnel, Sreelekha Millet, Dylan B. (2018) Aerosol Optical Depth Over India Journal of Geophysical Research: Atmospheres, 123 (7). pp. 3688-3703. ISSN 2169-897X |
op_doi |
https://doi.org/10.1002/2017JD027719 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
123 |
container_issue |
7 |
container_start_page |
3688 |
op_container_end_page |
3703 |
_version_ |
1766009326608056320 |