NDLI: Decadal mass balance of the antarctic ice sheet and its contribution to global sea level rise

Content Provider	IEEE Xplore Digital Library
Author	Davis, C.H. Yonghong Li
Copyright Year	2004
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Missouri Univ., Columbia, MO (Davis, C.H.; Yonghong Li)
Abstract	We analyzed Antarctic ice sheet elevation change (dH/dt) from 1992-2002 using nearly 307 million elevation change measurements from ERS-1 and ERS-2 satellite radar altimeter data covering an area of about 8.5 million $km^{2}.$ Ten-year elevation change time series were constructed for 1,500 local regions, 22 drainage basins, East and West Antarctica, and the continent as a whole (north of 81.6degS). Almost all basins in East Antarctica were found to have long-term dH/dt trends that fell within plusmn3 cm/yr. In West Antarctica the long-term dH/dt trends varied from -9 cm/yr to +22 cm/yr occur over basin scales. Despite these significant spatial variations, both the East and West Antarctic ice sheets, and the continent as a whole are very close to a state of overall mass balance. The average elevation change for the Antarctic continent from 1992-2002 was found to be 1.4plusmn0.2 cm/yr. Considering decadal accumulation variability, this translates to a net sink of fresh water of 42plusmn23 Gt/yr. The Antarctic continent's decadal contribution to global sea level change is estimated to be -0.12plusmn0.07 mm/yr, which is very close to zero. The plusmn0.07 mm/yr error is a three-fold reduction in uncertainty compared to the most recent best estimate for the Antarctic ice sheet
Starting Page	1152
Ending Page	1155
File Size	543398
Page Count	4
File Format	PDF
ISBN	0780387422
DOI	10.1109/IGARSS.2004.1368618
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-20
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ice Sea level Antarctica Continents Area measurement Sea measurements Satellites Radar measurements Spaceborne radar Uncertainty
Content Type	Text
Resource Type	Article

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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
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