Abstract

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.

Details

Title
Global sea level change signatures observed by GRACE satellite gravimetry
Author
Jeon, Taehwan 1 ; Ki-Weon Seo 1   VIAFID ORCID Logo  ; Youm, Kookhyoun 1   VIAFID ORCID Logo  ; Chen, Jianli 2 ; Wilson, Clark R 3 

 Department of Earth Science Education, Seoul National University, Seoul, Republic of Korea 
 Center for Space Research, University of Texas at Austin, Austin, Texas, USA 
 Center for Space Research, University of Texas at Austin, Austin, Texas, USA; Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, Texas, USA 
Pages
1-10
Publication year
2018
Publication date
Sep 2018
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2101982071
Copyright
© 2018. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.