Global sea level change signatures observed by GRACE satellite gravimetry

Ice mass loss on land results in sea level rise, but its rate varies regionally due to gravitational self-attraction effects. Observing regional sea level rates by ocean mass change using the Gravity Recovery and Climate Experiment (GRACE) gravity solutions is difficult due to GRACE’s spatial resolu...

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Autores principales: Jeon, Taehwan, Seo, Ki-Weon, Youm, Kookhyoun, Chen, Jianli, Wilson, Clark R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6131218/
https://www.ncbi.nlm.nih.gov/pubmed/30202083
http://dx.doi.org/10.1038/s41598-018-31972-8
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author Jeon, Taehwan
Seo, Ki-Weon
Youm, Kookhyoun
Chen, Jianli
Wilson, Clark R.
author_facet Jeon, Taehwan
Seo, Ki-Weon
Youm, Kookhyoun
Chen, Jianli
Wilson, Clark R.
author_sort Jeon, Taehwan
collection PubMed
description Ice mass loss on land results in sea level rise, but its rate varies regionally due to gravitational self-attraction effects. Observing regional sea level rates by ocean mass change using the Gravity Recovery and Climate Experiment (GRACE) gravity solutions is difficult due to GRACE’s spatial resolution (~a few hundred km) and other limitations. Here we estimate regional sea level mass change using GRACE data (without contributions from temperature and salinity variations) by addressing these limitations: restoring spatially spread and attenuated signals in post-processed GRACE data; constraining ocean mass distribution to conform to the changing geoid; and judging specific corrections applied to GRACE data including a new geocenter estimate. The estimated global sea level mass trend for 2003–2014 is 2.14 ± 0.12 mm/yr. Regional trends differ considerably among ocean basins, ranging from −0.5 mm/yr in the Arctic to about 2.4 mm/yr in the Indian and South Atlantic Oceans.
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spelling pubmed-61312182018-09-13 Global sea level change signatures observed by GRACE satellite gravimetry Jeon, Taehwan Seo, Ki-Weon Youm, Kookhyoun Chen, Jianli Wilson, Clark R. Sci Rep Article Ice mass loss on land results in sea level rise, but its rate varies regionally due to gravitational self-attraction effects. Observing regional sea level rates by ocean mass change using the Gravity Recovery and Climate Experiment (GRACE) gravity solutions is difficult due to GRACE’s spatial resolution (~a few hundred km) and other limitations. Here we estimate regional sea level mass change using GRACE data (without contributions from temperature and salinity variations) by addressing these limitations: restoring spatially spread and attenuated signals in post-processed GRACE data; constraining ocean mass distribution to conform to the changing geoid; and judging specific corrections applied to GRACE data including a new geocenter estimate. The estimated global sea level mass trend for 2003–2014 is 2.14 ± 0.12 mm/yr. Regional trends differ considerably among ocean basins, ranging from −0.5 mm/yr in the Arctic to about 2.4 mm/yr in the Indian and South Atlantic Oceans. Nature Publishing Group UK 2018-09-10 /pmc/articles/PMC6131218/ /pubmed/30202083 http://dx.doi.org/10.1038/s41598-018-31972-8 Text en © The Author(s) 2018 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Jeon, Taehwan
Seo, Ki-Weon
Youm, Kookhyoun
Chen, Jianli
Wilson, Clark R.
Global sea level change signatures observed by GRACE satellite gravimetry
title Global sea level change signatures observed by GRACE satellite gravimetry
title_full Global sea level change signatures observed by GRACE satellite gravimetry
title_fullStr Global sea level change signatures observed by GRACE satellite gravimetry
title_full_unstemmed Global sea level change signatures observed by GRACE satellite gravimetry
title_short Global sea level change signatures observed by GRACE satellite gravimetry
title_sort global sea level change signatures observed by grace satellite gravimetry
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6131218/
https://www.ncbi.nlm.nih.gov/pubmed/30202083
http://dx.doi.org/10.1038/s41598-018-31972-8
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