A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon
The multiple altimeter missions have not only advanced our knowledge of oceancirculation, ice sheet topography, and global climate, but also improved the accuracy ofaltimetric measurements by cross-calibration and validation. In this paper, one year’ssimultaneous maps of sea level anomaly (MSLA...
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ftdoajarticles:oai:doaj.org/article:94a33da1872644c79e1e77f52ea23661 2023-05-15T16:41:05+02:00 A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon Ge Chen Caiyun Zhang 2006-03-01T00:00:00Z https://doi.org/10.3390/s6030235 https://doaj.org/article/94a33da1872644c79e1e77f52ea23661 EN eng MDPI AG http://www.mdpi.com/1424-8220/6/3/235/ https://doaj.org/toc/1424-8220 doi:10.3390/s6030235 1424-8220 https://doaj.org/article/94a33da1872644c79e1e77f52ea23661 Sensors, Vol 6, Iss 3, Pp 235-248 (2006) sea level anomaly altimeter data comparison Chemical technology TP1-1185 article 2006 ftdoajarticles https://doi.org/10.3390/s6030235 2022-12-30T23:45:53Z The multiple altimeter missions have not only advanced our knowledge of oceancirculation, ice sheet topography, and global climate, but also improved the accuracy ofaltimetric measurements by cross-calibration and validation. In this paper, one year’ssimultaneous maps of sea level anomaly (MSLA) data obtained from four altimeters,Envisat, Geosat Follow-On (GFO), Jason-1, and TOPEX/Poseidon (T/P), have beencompiled for a preliminary comparison. First, the discrepancy in global geographicaldistribution of each product relative to the merged MSLA field is analyzed and its signalretrieval capability is discussed. Second, the space/time variability of each discrepancy inthe Atlantic Ocean, Indian Ocean, Pacific Ocean, Northern Hemisphere, SouthernHemisphere, and global ocean is studied. Third, each discrepancy as a function of latitude,longitude, and merged MSLA is presented. The results show that Jason-1 is the best single-mission for mapping large scale sea level variation, while T/P in its new orbit presents thepoorest estimation of SLA due to the short period (from cycle 369 to 403) used to determinethe mean profile. A clear understanding of each product discrepancy is necessary for ameaningful combination or merging of multi-altimeter data, optimal product selection, aswell as for their assimilation into numerical models. Article in Journal/Newspaper Ice Sheet Directory of Open Access Journals: DOAJ Articles Pacific Indian Sensors 6 3 235 248 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
sea level anomaly altimeter data comparison Chemical technology TP1-1185 |
spellingShingle |
sea level anomaly altimeter data comparison Chemical technology TP1-1185 Ge Chen Caiyun Zhang A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon |
topic_facet |
sea level anomaly altimeter data comparison Chemical technology TP1-1185 |
description |
The multiple altimeter missions have not only advanced our knowledge of oceancirculation, ice sheet topography, and global climate, but also improved the accuracy ofaltimetric measurements by cross-calibration and validation. In this paper, one year’ssimultaneous maps of sea level anomaly (MSLA) data obtained from four altimeters,Envisat, Geosat Follow-On (GFO), Jason-1, and TOPEX/Poseidon (T/P), have beencompiled for a preliminary comparison. First, the discrepancy in global geographicaldistribution of each product relative to the merged MSLA field is analyzed and its signalretrieval capability is discussed. Second, the space/time variability of each discrepancy inthe Atlantic Ocean, Indian Ocean, Pacific Ocean, Northern Hemisphere, SouthernHemisphere, and global ocean is studied. Third, each discrepancy as a function of latitude,longitude, and merged MSLA is presented. The results show that Jason-1 is the best single-mission for mapping large scale sea level variation, while T/P in its new orbit presents thepoorest estimation of SLA due to the short period (from cycle 369 to 403) used to determinethe mean profile. A clear understanding of each product discrepancy is necessary for ameaningful combination or merging of multi-altimeter data, optimal product selection, aswell as for their assimilation into numerical models. |
format |
Article in Journal/Newspaper |
author |
Ge Chen Caiyun Zhang |
author_facet |
Ge Chen Caiyun Zhang |
author_sort |
Ge Chen |
title |
A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon |
title_short |
A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon |
title_full |
A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon |
title_fullStr |
A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon |
title_full_unstemmed |
A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon |
title_sort |
first comparison of simultaneous sea level measurements from envisat, gfo, jason-1, and topex/poseidon |
publisher |
MDPI AG |
publishDate |
2006 |
url |
https://doi.org/10.3390/s6030235 https://doaj.org/article/94a33da1872644c79e1e77f52ea23661 |
geographic |
Pacific Indian |
geographic_facet |
Pacific Indian |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Sensors, Vol 6, Iss 3, Pp 235-248 (2006) |
op_relation |
http://www.mdpi.com/1424-8220/6/3/235/ https://doaj.org/toc/1424-8220 doi:10.3390/s6030235 1424-8220 https://doaj.org/article/94a33da1872644c79e1e77f52ea23661 |
op_doi |
https://doi.org/10.3390/s6030235 |
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Sensors |
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6 |
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3 |
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235 |
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248 |
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1766031525800837120 |