Potential for improved ATSR dual-view SST retrieval
Recent validation studies have confirmed that the first along-track scanning radiometer (ATSR) can retrieve sea surface temperature (SST) to an accuracy of 0.3K even in the presence of heavy atmospheric aerosol. However, using the standard (pre-launch) retrieval, this accuracy is achieved only when...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1998
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| _version_ | 1797052087350067200 |
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| author | Murray, M Allen, M Merchant, C Harris, A |
| author_facet | Murray, M Allen, M Merchant, C Harris, A |
| author_sort | Murray, M |
| collection | OXFORD |
| description | Recent validation studies have confirmed that the first along-track scanning radiometer (ATSR) can retrieve sea surface temperature (SST) to an accuracy of 0.3K even in the presence of heavy atmospheric aerosol. However, using the standard (pre-launch) retrieval, this accuracy is achieved only when data from all three thermal channels (3.7, 11 and 12 μm) are available; in the absence of 3.7 μm data, retrieved SSTs are subject to significant cold bias. As 3.7 μm data are useful only for nighttime observations, and ATSR's 3.7 μm channel failed in May 1992, only 11 and 12 μm data informed SST derivation for most of the 1991 - 1996 mission. We demonstrate the potential for improvement in this retrieval, based on comparison of observed brigthness temperatures with precise SSTs derived using 3.7 μm data. A reduction in global-mean cold bias from >0.6K to <0.1K is achieved, with standard deviation approximately halved. We also examine the treatment of optical pathlength variation around the ATSR swath. |
| first_indexed | 2024-03-06T18:27:50Z |
| format | Journal article |
| id | oxford-uuid:0898eb7a-8b5e-4d5d-9cd7-da75e16f3710 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:27:50Z |
| publishDate | 1998 |
| record_format | dspace |
| spelling | oxford-uuid:0898eb7a-8b5e-4d5d-9cd7-da75e16f37102022-03-26T09:13:40ZPotential for improved ATSR dual-view SST retrievalJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0898eb7a-8b5e-4d5d-9cd7-da75e16f3710EnglishSymplectic Elements at Oxford1998Murray, MAllen, MMerchant, CHarris, ARecent validation studies have confirmed that the first along-track scanning radiometer (ATSR) can retrieve sea surface temperature (SST) to an accuracy of 0.3K even in the presence of heavy atmospheric aerosol. However, using the standard (pre-launch) retrieval, this accuracy is achieved only when data from all three thermal channels (3.7, 11 and 12 μm) are available; in the absence of 3.7 μm data, retrieved SSTs are subject to significant cold bias. As 3.7 μm data are useful only for nighttime observations, and ATSR's 3.7 μm channel failed in May 1992, only 11 and 12 μm data informed SST derivation for most of the 1991 - 1996 mission. We demonstrate the potential for improvement in this retrieval, based on comparison of observed brigthness temperatures with precise SSTs derived using 3.7 μm data. A reduction in global-mean cold bias from >0.6K to <0.1K is achieved, with standard deviation approximately halved. We also examine the treatment of optical pathlength variation around the ATSR swath. |
| spellingShingle | Murray, M Allen, M Merchant, C Harris, A Potential for improved ATSR dual-view SST retrieval |
| title | Potential for improved ATSR dual-view SST retrieval |
| title_full | Potential for improved ATSR dual-view SST retrieval |
| title_fullStr | Potential for improved ATSR dual-view SST retrieval |
| title_full_unstemmed | Potential for improved ATSR dual-view SST retrieval |
| title_short | Potential for improved ATSR dual-view SST retrieval |
| title_sort | potential for improved atsr dual view sst retrieval |
| work_keys_str_mv | AT murraym potentialforimprovedatsrdualviewsstretrieval AT allenm potentialforimprovedatsrdualviewsstretrieval AT merchantc potentialforimprovedatsrdualviewsstretrieval AT harrisa potentialforimprovedatsrdualviewsstretrieval |