NDLI: Assessing the global averaged sea-level budget from 2003 to 2010

Content Provider	Springer Nature Link
Author	Li, Juan Zuo, Juncheng Chen, Meixiang Tan, Wei Yang, Yiqiu
Copyright Year	2013
Abstract	A global mass balance (Greenland and Antarctica ice sheet mass loss, terrestrial water storage) and different sea-level components (observed sea-level from satellite altimetry, steric sea-level from Ishii data, and ocean mass from gravity recovery and climate experiment, GRACE) are estimated, in terms of seasonal and interannual variabilities from 2003 to 2010. The results show that a detailed analysis of the GRACE time series over the time period 2003–2010 unambiguously reveals an increase in mass loss from the Greenland ice sheet and Antarctica ice sheet. The mass loss of both ice sheets accelerated at a rate of (392.8±70.0) Gt/a during 2003–2010, which contributed (1.09±0.19) mm/a to the globalmean sea-level during this time. The net terrestrial water storage (TWS) trend was negative over the 8 a time span, which gave a small positive contribution of (0.25±0.12) mm/a. The interannual variability of the globalmean sea-level was at least partly caused by year-to-year variability of land water storage. Estimating GRACE-based ice sheet mass balance and terrestrial water storage by using published estimates for melting glaciers, the results further show that the ocean mass increase since 2003 has resulted half from an enhanced contribution of the polar ice sheets, and half from the combined ice sheet and terrestrial water storage loss. Taking also into account the melting of mountain glaciers (0.41 mm/a) and the small GRACE-based contribution from continental waters (0.25 mm/a), a total ocean mass contribution of (1.75±0.57) mm/a from 2003 to 2010 is found. Such a value represented 75% of the altimetry-based rate of sea-level rise over that period. The contributions to steric sea-level (i.e., ocean thermal expansion plus salinity effects) are estimated from: (1) the difference between altimetry-based sea-level and ocean mass change and (2) the latest Ishii data. The inferred steric sea-level rate from(1) (1.41 mm/a from 2003 to 2010) did not agree well with the Ishii-based value also estimated here (0.44 mm/a from 2003 to 2010), but phase. The cause for such a discrepancy is not yet known but may be related to inadequate sampling of in situ ocean temperature and salinity measurements.
Starting Page	16
Ending Page	23
Page Count	8
File Format	PDF
ISSN	0253505X
Journal	Acta Oceanologica Sinica
Volume Number	32
Issue Number	10
e-ISSN	18691099
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-10-24
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	sea-level ice sheetmelt terrestrial water steric sea-level Oceanography Climatology Ecology Engineering Fluid Dynamics Marine & Freshwater Sciences Environmental Chemistry
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Oceanography

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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