Continental mass change from GRACE over 2002-2011 and its impact on sea level
Present-day continental mass variation as observed by space gravimetry reveals secular mass decline and accumulation. Whereas the former contributes to sea-level rise, the latter results in sea-level fall. As such, consideration of mass accumulation (rather than focussing solely on mass loss) is imp...
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Online Access: | https://hdl.handle.net/20.500.11937/7045 https://doi.org/10.1007/s00190-012-0583-2 |
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ftcurtin:oai:espace.curtin.edu.au:20.500.11937/7045 2023-06-11T04:06:28+02:00 Continental mass change from GRACE over 2002-2011 and its impact on sea level Baur, O. Kuhn, Michael Featherstone, Will 2013 fulltext https://hdl.handle.net/20.500.11937/7045 https://doi.org/10.1007/s00190-012-0583-2 unknown Springer - Verlag http://hdl.handle.net/20.500.11937/7045 doi:10.1007/s00190-012-0583-2 Sea level Geocentre GRACE Time-variable gravity Mass variation Journal Article 2013 ftcurtin https://doi.org/20.500.11937/704510.1007/s00190-012-0583-2 2023-05-30T19:23:32Z Present-day continental mass variation as observed by space gravimetry reveals secular mass decline and accumulation. Whereas the former contributes to sea-level rise, the latter results in sea-level fall. As such, consideration of mass accumulation (rather than focussing solely on mass loss) is important for reliable overall estimates of sea-level change. Using data from the Gravity Recovery And Climate Experiment satellite mission, we quantify mass-change trends in 19 continental areas that exhibit a dominant signal. The integrated mass change within these regions is representative of the variation over the whole land areas. During the integer 9-year period of May 2002 to April 2011, GIA-adjusted mass gain and mass loss in these areas contributed, on average, to −(0.7 ± 0.4) mm/year of sea-level fall and + (1.8 ± 0.2) mm/year of sea-level rise; the net effect was + (1.1 ± 0.6) mm/year. Ice melting over Greenland, Iceland, Svalbard, the Canadian Arctic archipelago, Antarctica, Alaska and Patagonia was responsible for + (1.4±0.2) mm/year of the total balance. Hence, land-water mass accumulation compensated about 20 % of the impact of ice-melt water influx to the oceans. In order to assess the impact of geocentre motion, we converted geocentre coordinates derived from satellite laser ranging (SLR) to degree-one geopotential coefficients. We found geocentre motion to introduce small biases to mass-change and sea-level change estimates; its overall effect is + (0.1 ± 0.1) mm/year. This value, however, should be taken with care owing to questionable reliability of secular trends in SLR-derived geocentre coordinates. Article in Journal/Newspaper Antarc* Antarctica Archipelago Arctic Archipelago Arctic Canadian Arctic Archipelago Greenland Iceland Svalbard Alaska Curtin University: espace Arctic Canadian Arctic Archipelago Greenland Patagonia Svalbard Journal of Geodesy 87 2 117 125 |
institution |
Open Polar |
collection |
Curtin University: espace |
op_collection_id |
ftcurtin |
language |
unknown |
topic |
Sea level Geocentre GRACE Time-variable gravity Mass variation |
spellingShingle |
Sea level Geocentre GRACE Time-variable gravity Mass variation Baur, O. Kuhn, Michael Featherstone, Will Continental mass change from GRACE over 2002-2011 and its impact on sea level |
topic_facet |
Sea level Geocentre GRACE Time-variable gravity Mass variation |
description |
Present-day continental mass variation as observed by space gravimetry reveals secular mass decline and accumulation. Whereas the former contributes to sea-level rise, the latter results in sea-level fall. As such, consideration of mass accumulation (rather than focussing solely on mass loss) is important for reliable overall estimates of sea-level change. Using data from the Gravity Recovery And Climate Experiment satellite mission, we quantify mass-change trends in 19 continental areas that exhibit a dominant signal. The integrated mass change within these regions is representative of the variation over the whole land areas. During the integer 9-year period of May 2002 to April 2011, GIA-adjusted mass gain and mass loss in these areas contributed, on average, to −(0.7 ± 0.4) mm/year of sea-level fall and + (1.8 ± 0.2) mm/year of sea-level rise; the net effect was + (1.1 ± 0.6) mm/year. Ice melting over Greenland, Iceland, Svalbard, the Canadian Arctic archipelago, Antarctica, Alaska and Patagonia was responsible for + (1.4±0.2) mm/year of the total balance. Hence, land-water mass accumulation compensated about 20 % of the impact of ice-melt water influx to the oceans. In order to assess the impact of geocentre motion, we converted geocentre coordinates derived from satellite laser ranging (SLR) to degree-one geopotential coefficients. We found geocentre motion to introduce small biases to mass-change and sea-level change estimates; its overall effect is + (0.1 ± 0.1) mm/year. This value, however, should be taken with care owing to questionable reliability of secular trends in SLR-derived geocentre coordinates. |
format |
Article in Journal/Newspaper |
author |
Baur, O. Kuhn, Michael Featherstone, Will |
author_facet |
Baur, O. Kuhn, Michael Featherstone, Will |
author_sort |
Baur, O. |
title |
Continental mass change from GRACE over 2002-2011 and its impact on sea level |
title_short |
Continental mass change from GRACE over 2002-2011 and its impact on sea level |
title_full |
Continental mass change from GRACE over 2002-2011 and its impact on sea level |
title_fullStr |
Continental mass change from GRACE over 2002-2011 and its impact on sea level |
title_full_unstemmed |
Continental mass change from GRACE over 2002-2011 and its impact on sea level |
title_sort |
continental mass change from grace over 2002-2011 and its impact on sea level |
publisher |
Springer - Verlag |
publishDate |
2013 |
url |
https://hdl.handle.net/20.500.11937/7045 https://doi.org/10.1007/s00190-012-0583-2 |
geographic |
Arctic Canadian Arctic Archipelago Greenland Patagonia Svalbard |
geographic_facet |
Arctic Canadian Arctic Archipelago Greenland Patagonia Svalbard |
genre |
Antarc* Antarctica Archipelago Arctic Archipelago Arctic Canadian Arctic Archipelago Greenland Iceland Svalbard Alaska |
genre_facet |
Antarc* Antarctica Archipelago Arctic Archipelago Arctic Canadian Arctic Archipelago Greenland Iceland Svalbard Alaska |
op_relation |
http://hdl.handle.net/20.500.11937/7045 doi:10.1007/s00190-012-0583-2 |
op_doi |
https://doi.org/20.500.11937/704510.1007/s00190-012-0583-2 |
container_title |
Journal of Geodesy |
container_volume |
87 |
container_issue |
2 |
container_start_page |
117 |
op_container_end_page |
125 |
_version_ |
1768378456885690368 |