Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India
International audience The Moderate Resolution Imaging Spectroradiometer (MODIS) onboard EOS Terra measures global aerosol optical depth and optical properties since 2000. MODIS aerosol products are freely available and are being used for numerous studies. In this paper, we present a comparison of a...
Main Authors: | , , , , , |
---|---|
Other Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2005
|
Subjects: | |
Online Access: | https://hal.science/hal-00317670 https://hal.science/hal-00317670/document https://hal.science/hal-00317670/file/angeo-23-1093-2005.pdf |
id |
ftccsdartic:oai:HAL:hal-00317670v1 |
---|---|
record_format |
openpolar |
spelling |
ftccsdartic:oai:HAL:hal-00317670v1 2023-11-12T03:59:49+01:00 Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India Tripathi, S. N. Dey, Sagnik Chandel, A. Srivastava, S. Singh, Ramesh P. Holben, B. N. Department of Civil Engineering Kanpur Indian Institute of Technology Kanpur (IIT Kanpur) School of Computational Sciences George Mason University Fairfax NASA Goddard Space Flight Center (GSFC) 2005-06-03 https://hal.science/hal-00317670 https://hal.science/hal-00317670/document https://hal.science/hal-00317670/file/angeo-23-1093-2005.pdf en eng HAL CCSD European Geosciences Union hal-00317670 https://hal.science/hal-00317670 https://hal.science/hal-00317670/document https://hal.science/hal-00317670/file/angeo-23-1093-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317670 Annales Geophysicae, 2005, 23 (4), pp.1093-1101 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences info:eu-repo/semantics/article Journal articles 2005 ftccsdartic 2023-10-21T23:07:13Z International audience The Moderate Resolution Imaging Spectroradiometer (MODIS) onboard EOS Terra measures global aerosol optical depth and optical properties since 2000. MODIS aerosol products are freely available and are being used for numerous studies. In this paper, we present a comparison of aerosol optical depth (AOD) retrieved from MODIS with Aerosol Robotic Network (AERONET) data for the year 2004 over Kanpur, an industrial city lying in the Ganga Basin in the northern part of India. AOD retrieved from MODIS (? aMODIS ) at 0.55µm wavelength has been compared with the AERONET derived AOD (? aAERONET ), within an optimum space-time window. Although the correlation between ? aMODIS and ? aAERONET during the post-monsoon and winter seasons (R 2 ~0.71) is almost equal to that during the pre-monsoon and monsoon seasons (R 2 ~0.72), MODIS is found to overestimate AOD during the pre-monsoon and monsoon period (characterized by severe dust loading) and underestimate during the post-monsoon and winter seasons. The absolute difference between ? aMODIS and ? aAERONET is found to be low (0.12±0.11) during the non-dust loading season and much higher (0.4±0.2) during dust-loading seasons. The absolute error in ? aMODIS is found to be about ~25% of the absolute values of ? aMODIS . Our comparison shows the importance of modifying the existing MODIS algorithm during the dust-loading seasons, especially in the Ganga Basin in northern part of India. Article in Journal/Newspaper Aerosol Robotic Network Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Tripathi, S. N. Dey, Sagnik Chandel, A. Srivastava, S. Singh, Ramesh P. Holben, B. N. Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU]Sciences of the Universe [physics]/Earth Sciences |
description |
International audience The Moderate Resolution Imaging Spectroradiometer (MODIS) onboard EOS Terra measures global aerosol optical depth and optical properties since 2000. MODIS aerosol products are freely available and are being used for numerous studies. In this paper, we present a comparison of aerosol optical depth (AOD) retrieved from MODIS with Aerosol Robotic Network (AERONET) data for the year 2004 over Kanpur, an industrial city lying in the Ganga Basin in the northern part of India. AOD retrieved from MODIS (? aMODIS ) at 0.55µm wavelength has been compared with the AERONET derived AOD (? aAERONET ), within an optimum space-time window. Although the correlation between ? aMODIS and ? aAERONET during the post-monsoon and winter seasons (R 2 ~0.71) is almost equal to that during the pre-monsoon and monsoon seasons (R 2 ~0.72), MODIS is found to overestimate AOD during the pre-monsoon and monsoon period (characterized by severe dust loading) and underestimate during the post-monsoon and winter seasons. The absolute difference between ? aMODIS and ? aAERONET is found to be low (0.12±0.11) during the non-dust loading season and much higher (0.4±0.2) during dust-loading seasons. The absolute error in ? aMODIS is found to be about ~25% of the absolute values of ? aMODIS . Our comparison shows the importance of modifying the existing MODIS algorithm during the dust-loading seasons, especially in the Ganga Basin in northern part of India. |
author2 |
Department of Civil Engineering Kanpur Indian Institute of Technology Kanpur (IIT Kanpur) School of Computational Sciences George Mason University Fairfax NASA Goddard Space Flight Center (GSFC) |
format |
Article in Journal/Newspaper |
author |
Tripathi, S. N. Dey, Sagnik Chandel, A. Srivastava, S. Singh, Ramesh P. Holben, B. N. |
author_facet |
Tripathi, S. N. Dey, Sagnik Chandel, A. Srivastava, S. Singh, Ramesh P. Holben, B. N. |
author_sort |
Tripathi, S. N. |
title |
Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India |
title_short |
Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India |
title_full |
Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India |
title_fullStr |
Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India |
title_full_unstemmed |
Comparison of MODIS and AERONET derived aerosol optical depth over the Ganga Basin, India |
title_sort |
comparison of modis and aeronet derived aerosol optical depth over the ganga basin, india |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00317670 https://hal.science/hal-00317670/document https://hal.science/hal-00317670/file/angeo-23-1093-2005.pdf |
genre |
Aerosol Robotic Network |
genre_facet |
Aerosol Robotic Network |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00317670 Annales Geophysicae, 2005, 23 (4), pp.1093-1101 |
op_relation |
hal-00317670 https://hal.science/hal-00317670 https://hal.science/hal-00317670/document https://hal.science/hal-00317670/file/angeo-23-1093-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782336369246339072 |