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Ice processes and growth history on Arctic and sub-Arctic lakes using ERS-1 SAR data

Published online by Cambridge University Press:  27 October 2009

K. Morris ,
M. O. Jeffries  and
W. F. Weeks
K. Morris
Affiliation:
Geophysical Institute, University of Alaska, PO Box 757320, Fairbanks, AK 99775-7320, USA
M. O. Jeffries
Affiliation:
Geophysical Institute, University of Alaska, PO Box 757320, Fairbanks, AK 99775-7320, USA
W. F. Weeks
Affiliation:
Geophysical Institute, University of Alaska, PO Box 757320, Fairbanks, AK 99775-7320, USA
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Abstract

A survey of ice growth and decay processes on a selection of shallow and deep sub-Arctic and Arctic lakes was conducted using radiometrically calibrated ERS-1 SAR images. Time series of radar backscatter data were compiled for selected sites on the lakes during the period of ice cover (September to June) for the years 1991–92 and 1992–93. A variety of lake-ice processes could be observed, and significant changes in backscatter occurred from the time of initial ice formation in autumn until the onset of the spring thaw. Backscatter also varied according to the location and depth of the lakes. The spatial and temporal changes in backscatter were most constant and predictable at the shallow lakes on the North Slope of Alaska. As a consequence, they represent the most promising sites for long-term monitoring and the detection of changes related to global warming and its effects on the polar regions.

Type
Articles
Information
Polar Record , Volume 31 , Issue 177 , April 1995 , pp. 115 - 128
Copyright
Copyright © Cambridge University Press 1995

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