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 ocean circulation, ice sheet topography, and global climate, but also improved the accuracy of altimetric measurements by cross-calibration and validation. In this paper, one year's simultaneous maps of sea level anomaly (M...
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ftpubmed:oai:pubmedcentral.nih.gov:3871952 2023-05-15T16:41:03+02:00 A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon Zhang, Caiyun Chen, Ge 2006-03-17 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3871952 en eng Molecular Diversity Preservation International (MDPI) http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3871952 © 2006 by MDPI (http://www.mdpi.org). Reproduction is permitted for noncommercial purposes. Full Research Article Text 2006 ftpubmed 2013-12-29T01:42:27Z The multiple altimeter missions have not only advanced our knowledge of ocean circulation, ice sheet topography, and global climate, but also improved the accuracy of altimetric measurements by cross-calibration and validation. In this paper, one year's simultaneous maps of sea level anomaly (MSLA) data obtained from four altimeters, Envisat, Geosat Follow-On (GFO), Jason-1, and TOPEX/Poseidon (T/P), have been compiled for a preliminary comparison. First, the discrepancy in global geographical distribution of each product relative to the merged MSLA field is analyzed and its signal retrieval capability is discussed. Second, the space/time variability of each discrepancy in the Atlantic Ocean, Indian Ocean, Pacific Ocean, Northern Hemisphere, Southern Hemisphere, 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 the poorest estimation of SLA due to the short period (from cycle 369 to 403) used to determine the mean profile. A clear understanding of each product discrepancy is necessary for a meaningful combination or merging of multi-altimeter data, optimal product selection, as well as for their assimilation into numerical models. Text Ice Sheet PubMed Central (PMC) Indian Pacific |
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Full Research Article Zhang, Caiyun Chen, Ge A First Comparison of Simultaneous Sea Level Measurements from Envisat, GFO, Jason-1, and TOPEX/Poseidon |
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Full Research Article |
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The multiple altimeter missions have not only advanced our knowledge of ocean circulation, ice sheet topography, and global climate, but also improved the accuracy of altimetric measurements by cross-calibration and validation. In this paper, one year's simultaneous maps of sea level anomaly (MSLA) data obtained from four altimeters, Envisat, Geosat Follow-On (GFO), Jason-1, and TOPEX/Poseidon (T/P), have been compiled for a preliminary comparison. First, the discrepancy in global geographical distribution of each product relative to the merged MSLA field is analyzed and its signal retrieval capability is discussed. Second, the space/time variability of each discrepancy in the Atlantic Ocean, Indian Ocean, Pacific Ocean, Northern Hemisphere, Southern Hemisphere, 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 the poorest estimation of SLA due to the short period (from cycle 369 to 403) used to determine the mean profile. A clear understanding of each product discrepancy is necessary for a meaningful combination or merging of multi-altimeter data, optimal product selection, as well as for their assimilation into numerical models. |
format |
Text |
author |
Zhang, Caiyun Chen, Ge |
author_facet |
Zhang, Caiyun Chen, Ge |
author_sort |
Zhang, Caiyun |
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 |
Molecular Diversity Preservation International (MDPI) |
publishDate |
2006 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3871952 |
geographic |
Indian Pacific |
geographic_facet |
Indian Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3871952 |
op_rights |
© 2006 by MDPI (http://www.mdpi.org). Reproduction is permitted for noncommercial purposes. |
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