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Science 22 December 1989:
Vol. 246. no. 4937, pp. 1587 - 1589
DOI: 10.1126/science.246.4937.1587
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Articles

Growth of Greenland Ice Sheet: Measurement

H. JAY ZWALLY 1, ROBERT A. BINDSCHADLER 1, ANITA C. BRENNER 2, JUDY A. MAJOR 2, and JAMES G. MARSH 3

1 Oceans and Ice Branch, Code 671, National Aeronautics and Space Administration (NASA), Goddard Space Flight Center, Greenbelt, MD 20771.
2 ST Systems Corporation, 4400 Forbes Way, Lanham, MD 20706.
3 Space Geodesy Branch, Code 626, NASA, Goddard Space Flight Center, Greenbelt, MD 20771.

Measurements of ice-sheet elevation change by satellite altimetry show that the Greenland surface elevation south of 72° north latitude is increasing. The vertical velocity of the surface is 0.20 ± 0.06 meters per year from measured changes in surface elevations at 5906 intersections between Geosat paths in 1985 and Seasat in 1978, and 0.28 ± 0.02 meters per year from 256,694 intersections of Geosat paths during a 548-day period of 1985 to 1986.

Submitted on June 29, 1989
Accepted on October 13, 1989


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