| SENSITIVITY OF SEA SURFACE TEMPERATURE RETRIEVAL TO SEA SURFACE EMISSIVITY |
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| 作者姓名： | Wu Xiangqian William L. Smith |
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| 作者单位： | Cooperative Institute for Meteorological Satellite Studies Space Science and Engineering Center，University of Wisconsin，Madison.WI 53706 USA，Cooperative Institute for Meteorological Satellite Studies，Space Science and Engineering Center，University of Wisconsin，Madison.WI 53706 USA |
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| 摘 要： | To estimate sea surface temperature(SST)with high accuracy from radiometrie measure-ments,it is no longer acceptable to assume that sea surface emissivity is unity or any other con-stant.This note presents an investigation of the desirable emissivity accuracy in relation to re-trieval.It was found that 1% error in surface emissivity can cause up to 0.7 K error in the re-trieved SST,although this sensitivity is often reduced to about 0.5 K on average because of thedownward atmospheric radiation at surface partially compensates for the emissivity error.Since thedownward atmospheric radiation ratio is controlled to a large extent by the integrated water vaporin the atmosphere and,secondarily,by view angle,the sensitivity of SST retrieval to surface emis-sivity has been computed as a function of these two parameters.
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| 收稿时间： | 1995/12/20 0:00:00 |
| 修稿时间： | 2/7/1996 12:00:00 AM |
SENSITIVITY OF SEA SURFACE TEMPERATURE RETRIEVAL TO SEA SURFACE EMISSIVITY |
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| Wu Xiangqian,William L. Smith.SENSITIVITY OF SEA SURFACE TEMPERATURE RETRIEVAL TO SEA SURFACE EMISSIVITY[J].Acta Meteorologica Sinica,1996,10(3):376-384. |
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| Authors: | Wu Xiangqian and William L Smith |
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| Institution: | Wu Xiangqian William L.Smith Cooperative Institute for Meteorological Satellite Studies,Space Science and Engineering Center,University of Wisconsin,Madison.WI 53706 USA |
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| Abstract: | To estimate sea surface temperature(SST)with high accuracy from radiometrie measure- ments,it is no longer acceptable to assume that sea surface emissivity is unity or any other con- stant.This note presents an investigation of the desirable emissivity accuracy in relation to re- trieval.It was found that 1% error in surface emissivity can cause up to 0.7 K error in the re- trieved SST,although this sensitivity is often reduced to about 0.5 K on average because of the downward atmospheric radiation at surface partially compensates for the emissivity error.Since the downward atmospheric radiation ratio is controlled to a large extent by the integrated water vapor in the atmosphere and,secondarily,by view angle,the sensitivity of SST retrieval to surface emis- sivity has been computed as a function of these two parameters. |
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| Keywords: | sea surface temperature(SST) sea surface emissivity retrieval radiation water vapor |
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