Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations
Present-day mass redistribution increases the total ocean mass and, on average, causes the ocean bottom to subside elastically. Therefore, barystatic sea-level rise is larger than the resulting global-mean geocentric sea-level rise,observed by satellite altimetry and GPS-corrected tide gauges. We us...
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ftunivtasecite:oai:ecite.utas.edu.au:122584 2023-05-15T15:05:21+02:00 Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations Frederikse, T Riva, REM King, MA 2017 application/pdf https://doi.org/10.1002/2017GL075419 http://ecite.utas.edu.au/122584 en eng Amer Geophysical Union http://ecite.utas.edu.au/122584/2/122584 - Ocean bottom deformation due to present-day mass redistribution and its impact on sea-level observations.pdf http://dx.doi.org/10.1002/2017GL075419 http://purl.org/au-research/grants/arc/DP150100615 Frederikse, T and Riva, REM and King, MA, Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations, Geophysical Research Letters, 44, (24) pp. 12306-12314. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/122584 Engineering Geomatic Engineering Geodesy Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.1002/2017GL075419 2019-12-13T22:21:24Z Present-day mass redistribution increases the total ocean mass and, on average, causes the ocean bottom to subside elastically. Therefore, barystatic sea-level rise is larger than the resulting global-mean geocentric sea-level rise,observed by satellite altimetry and GPS-corrected tide gauges. We use realistic estimates of mass redistribution from ice-mass loss and land-water storage to quantify the resulting ocean-bottom deformation and its effect on global and regional ocean-volume change estimates. Over 1993-2014, the resulting globally-averaged geocentric sea-level change is 8 percent smaller than the barystatic contribution. Over the altimetry domain, the difference is about 5 percent, and due to this effect, barystatic sea-level rise will be underestimated by more than 0.1 mm/y over 1993 -2014. Regional differences are of-ten larger: up to 1 mm/y over the Arctic Ocean and 0.4 mm/y in the South Pacific. Ocean bottom deformation should be considered when regional sea-level changes are observed in a geocentric reference frame. Article in Journal/Newspaper Arctic Arctic Ocean eCite UTAS (University of Tasmania) Arctic Arctic Ocean Geophysical Research Letters 44 24 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
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English |
topic |
Engineering Geomatic Engineering Geodesy |
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Engineering Geomatic Engineering Geodesy Frederikse, T Riva, REM King, MA Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations |
topic_facet |
Engineering Geomatic Engineering Geodesy |
description |
Present-day mass redistribution increases the total ocean mass and, on average, causes the ocean bottom to subside elastically. Therefore, barystatic sea-level rise is larger than the resulting global-mean geocentric sea-level rise,observed by satellite altimetry and GPS-corrected tide gauges. We use realistic estimates of mass redistribution from ice-mass loss and land-water storage to quantify the resulting ocean-bottom deformation and its effect on global and regional ocean-volume change estimates. Over 1993-2014, the resulting globally-averaged geocentric sea-level change is 8 percent smaller than the barystatic contribution. Over the altimetry domain, the difference is about 5 percent, and due to this effect, barystatic sea-level rise will be underestimated by more than 0.1 mm/y over 1993 -2014. Regional differences are of-ten larger: up to 1 mm/y over the Arctic Ocean and 0.4 mm/y in the South Pacific. Ocean bottom deformation should be considered when regional sea-level changes are observed in a geocentric reference frame. |
format |
Article in Journal/Newspaper |
author |
Frederikse, T Riva, REM King, MA |
author_facet |
Frederikse, T Riva, REM King, MA |
author_sort |
Frederikse, T |
title |
Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations |
title_short |
Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations |
title_full |
Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations |
title_fullStr |
Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations |
title_full_unstemmed |
Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations |
title_sort |
ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations |
publisher |
Amer Geophysical Union |
publishDate |
2017 |
url |
https://doi.org/10.1002/2017GL075419 http://ecite.utas.edu.au/122584 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_relation |
http://ecite.utas.edu.au/122584/2/122584 - Ocean bottom deformation due to present-day mass redistribution and its impact on sea-level observations.pdf http://dx.doi.org/10.1002/2017GL075419 http://purl.org/au-research/grants/arc/DP150100615 Frederikse, T and Riva, REM and King, MA, Ocean bottom deformation due to present-day mass redistribution and its impact on sea level observations, Geophysical Research Letters, 44, (24) pp. 12306-12314. ISSN 0094-8276 (2017) [Refereed Article] http://ecite.utas.edu.au/122584 |
op_doi |
https://doi.org/10.1002/2017GL075419 |
container_title |
Geophysical Research Letters |
container_volume |
44 |
container_issue |
24 |
_version_ |
1766337060337090560 |