Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite Analysis
Using data from Ozone Monitoring Instrument (OMI) and Moderate Resolution Imaging Spectroradiometer (MODIS) instruments, we have retrieved regional distribution of aerosol column single scattering albedo (parameter indicative of the relative dominance of aerosol absorption and scattering effects), a...
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| Format: | Article |
| Language: | English |
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Wiley
2010-01-01
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| Series: | Advances in Meteorology |
| Online Access: | http://dx.doi.org/10.1155/2010/139186 |
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| author | S. K. Satheesh V. Vinoj K. Krishnamoorthy |
| author_facet | S. K. Satheesh V. Vinoj K. Krishnamoorthy |
| author_sort | S. K. Satheesh |
| collection | DOAJ |
| description | Using data from Ozone Monitoring Instrument (OMI) and Moderate Resolution Imaging Spectroradiometer (MODIS) instruments, we have retrieved regional distribution of aerosol column single scattering albedo (parameter indicative of the relative dominance of aerosol absorption and scattering effects), a most important, but least understood aerosol property in assessing its climate impact. Consequently we provide improved assessment of short wave aerosol radiative forcing (ARF) (on both regional and seasonal scales) estimates over this region. Large gradients in north-south ARF were observed as a consequence of gradients in single scattering albedo as well as aerosol optical depth. The highest ARF (−37 W m−2 at the surface) was observed over the northern Arabian Sea during June to August period (JJA). In general, ARF was higher over northern Bay of Bengal (NBoB) during winter and premonsoon period, whereas the ARF was higher over northern Arabian Sea (NAS) during the monsoon and postmonsoon period. The largest forcing observed over NAS during JJA is the consequence of large amounts of desert dust transported from the west Asian dust sources. High as well as seasonally invariant aerosol single scattering albedos (~0.98) were observed over the southern Indian Ocean region far from continents. The ARF estimates based on direct measurements made at a remote island location, Minicoy (8.3∘N, 73∘E) in the southern Arabian Sea are in good agreement with the estimates made following multisatellite analysis. |
| format | Article |
| id | doaj-art-43a024032b944d15af0ee63e125e7a3f |
| institution | Kabale University |
| issn | 1687-9309 1687-9317 |
| language | English |
| publishDate | 2010-01-01 |
| publisher | Wiley |
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| series | Advances in Meteorology |
| spelling | doaj-art-43a024032b944d15af0ee63e125e7a3f2025-02-03T01:22:35ZengWileyAdvances in Meteorology1687-93091687-93172010-01-01201010.1155/2010/139186139186Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite AnalysisS. K. Satheesh0V. Vinoj1K. Krishnamoorthy2Indian Institute of Science, Bangalore 560012, IndiaIndian Institute of Science, Bangalore 560012, IndiaSpace Physics Laboratory, Vikram Sarabhai Space Centre, Thiruvananthapuram 695022, IndiaUsing data from Ozone Monitoring Instrument (OMI) and Moderate Resolution Imaging Spectroradiometer (MODIS) instruments, we have retrieved regional distribution of aerosol column single scattering albedo (parameter indicative of the relative dominance of aerosol absorption and scattering effects), a most important, but least understood aerosol property in assessing its climate impact. Consequently we provide improved assessment of short wave aerosol radiative forcing (ARF) (on both regional and seasonal scales) estimates over this region. Large gradients in north-south ARF were observed as a consequence of gradients in single scattering albedo as well as aerosol optical depth. The highest ARF (−37 W m−2 at the surface) was observed over the northern Arabian Sea during June to August period (JJA). In general, ARF was higher over northern Bay of Bengal (NBoB) during winter and premonsoon period, whereas the ARF was higher over northern Arabian Sea (NAS) during the monsoon and postmonsoon period. The largest forcing observed over NAS during JJA is the consequence of large amounts of desert dust transported from the west Asian dust sources. High as well as seasonally invariant aerosol single scattering albedos (~0.98) were observed over the southern Indian Ocean region far from continents. The ARF estimates based on direct measurements made at a remote island location, Minicoy (8.3∘N, 73∘E) in the southern Arabian Sea are in good agreement with the estimates made following multisatellite analysis.http://dx.doi.org/10.1155/2010/139186 |
| spellingShingle | S. K. Satheesh V. Vinoj K. Krishnamoorthy Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite Analysis Advances in Meteorology |
| title | Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite Analysis |
| title_full | Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite Analysis |
| title_fullStr | Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite Analysis |
| title_full_unstemmed | Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite Analysis |
| title_short | Assessment of Aerosol Radiative Impact over Oceanic Regions Adjacent to Indian Subcontinent Using Multisatellite Analysis |
| title_sort | assessment of aerosol radiative impact over oceanic regions adjacent to indian subcontinent using multisatellite analysis |
| url | http://dx.doi.org/10.1155/2010/139186 |
| work_keys_str_mv | AT sksatheesh assessmentofaerosolradiativeimpactoveroceanicregionsadjacenttoindiansubcontinentusingmultisatelliteanalysis AT vvinoj assessmentofaerosolradiativeimpactoveroceanicregionsadjacenttoindiansubcontinentusingmultisatelliteanalysis AT kkrishnamoorthy assessmentofaerosolradiativeimpactoveroceanicregionsadjacenttoindiansubcontinentusingmultisatelliteanalysis |