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The accuracy of SST retrievals from AATSR: An initial assessment through geophysical validation against in situ radiometers, buoys and other SST data sets

The accuracy of SST retrievals from AATSR: An initial assessment through geophysical validation against in situ radiometers, buoys and other SST data sets
The accuracy of SST retrievals from AATSR: An initial assessment through geophysical validation against in situ radiometers, buoys and other SST data sets
The Advanced Along-Track Scanning Radiometer (AATSR) was launched on Envisat in March 2002. The AATSR instrument is designed to retrieve precise and accurate global sea surface temperature (SST) that, combined with the large data set collected from its predecessors, ATSR and ATSR-2, will provide a long term record of SST data that is greater than 15 years. This record can be used for independent monitoring and detection of climate change. The AATSR validation programme has successfully completed its initial phase. The programme involves validation of the AATSR derived SST values using in situ radiometers, in situ buoys and global SST fields from other data sets. The results of the initial programme presented here will demonstrate that the AATSR instrument is currently close to meeting its scientific objectives of determining global SST to an accuracy of 0.3 K (one sigma). For night time data, the analysis gives a warm bias of between +0.04 K (0.28 K) for buoys to +0.06 K (0.20 K) for radiometers, with slightly higher errors observed for day time data, showing warm biases of between +0.02 (0.39 K) for buoys to +0.11 K (0.33 K) for radiometers. They show that the ATSR series of instruments continues to be the world leader in delivering accurate space-based observations of SST, which is a key climate parameter.
sea surface temperature, SST, remote sensing, ATSR, climate change, validation
0273-1177
764-769
Corlett, G.K.
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Barton, I.J.
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Donlan, C.J.
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Edwards, M.C.
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Good, S.A.
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Horrocks, L.A.
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Llewellyn-Jones, D.T.
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Merchant, C.J.
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Minnett, P.J.
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Nightingale, T.J.
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Noyes, E.J.
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O'Carroll, A.G.
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Remedios, J.J.
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Robinson, I.S.
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Saunders, R.W.
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Watts, J.G.
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Corlett, G.K.
76586378-6b7e-4efa-be86-5cef5d0055ec
Barton, I.J.
da6acd2e-334a-4d74-b36d-23c9553beb81
Donlan, C.J.
c1db7773-897a-42b2-a900-5ba706f8f5b9
Edwards, M.C.
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Good, S.A.
de1d7b04-1f04-46dd-9a35-489bdf334fdc
Horrocks, L.A.
4464672f-0b45-4f7f-9d37-8b1794d54f4e
Llewellyn-Jones, D.T.
00e28220-db74-4d68-9bbb-ba8c6d2d6720
Merchant, C.J.
834a7bd1-42dd-47e9-b21b-b4dd639646c6
Minnett, P.J.
3ba1612a-77fe-4ed1-8224-f6a390c2db64
Nightingale, T.J.
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Noyes, E.J.
b9d2ef97-c5d2-44bc-80fa-5fa94350ffcc
O'Carroll, A.G.
042c2b05-5cfd-4459-bbb1-c72f86915048
Remedios, J.J.
4747166f-cf81-44dc-9632-a477aacfe687
Robinson, I.S.
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Saunders, R.W.
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Watts, J.G.
6e6233d5-47c1-4ff9-8bbe-5620d79a7b73

Corlett, G.K., Barton, I.J., Donlan, C.J., Edwards, M.C., Good, S.A., Horrocks, L.A., Llewellyn-Jones, D.T., Merchant, C.J., Minnett, P.J., Nightingale, T.J., Noyes, E.J., O'Carroll, A.G., Remedios, J.J., Robinson, I.S., Saunders, R.W. and Watts, J.G. (2006) The accuracy of SST retrievals from AATSR: An initial assessment through geophysical validation against in situ radiometers, buoys and other SST data sets Advances in Space Research, 37, (4), pp. 764-769. (doi:10.1016/j.asr.2005.09.037).

Record type: Article

Abstract

The Advanced Along-Track Scanning Radiometer (AATSR) was launched on Envisat in March 2002. The AATSR instrument is designed to retrieve precise and accurate global sea surface temperature (SST) that, combined with the large data set collected from its predecessors, ATSR and ATSR-2, will provide a long term record of SST data that is greater than 15 years. This record can be used for independent monitoring and detection of climate change. The AATSR validation programme has successfully completed its initial phase. The programme involves validation of the AATSR derived SST values using in situ radiometers, in situ buoys and global SST fields from other data sets. The results of the initial programme presented here will demonstrate that the AATSR instrument is currently close to meeting its scientific objectives of determining global SST to an accuracy of 0.3 K (one sigma). For night time data, the analysis gives a warm bias of between +0.04 K (0.28 K) for buoys to +0.06 K (0.20 K) for radiometers, with slightly higher errors observed for day time data, showing warm biases of between +0.02 (0.39 K) for buoys to +0.11 K (0.33 K) for radiometers. They show that the ATSR series of instruments continues to be the world leader in delivering accurate space-based observations of SST, which is a key climate parameter.

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Published date: 2006
Keywords: sea surface temperature, SST, remote sensing, ATSR, climate change, validation

Identifiers

Local EPrints ID: 44689
URI: http://eprints.soton.ac.uk/id/eprint/44689
ISSN: 0273-1177
PURE UUID: e226de3f-c9f0-496e-b03d-0e88cdec33f5

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Date deposited: 08 Mar 2007
Last modified: 17 Jul 2017 15:14

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Contributors

Author: G.K. Corlett
Author: I.J. Barton
Author: C.J. Donlan
Author: M.C. Edwards
Author: S.A. Good
Author: L.A. Horrocks
Author: D.T. Llewellyn-Jones
Author: C.J. Merchant
Author: P.J. Minnett
Author: T.J. Nightingale
Author: E.J. Noyes
Author: A.G. O'Carroll
Author: J.J. Remedios
Author: I.S. Robinson
Author: R.W. Saunders
Author: J.G. Watts

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