Maximum Thickness and Subsequent Decay of Lake, River and Fast Sea Ice in Canada and Alaska

Weekly measurements of the thickness of lake, river and fast sea ice made over a period of 10 to 15 years at 66 locations in Canada and Alaska are analyzed, and the portion of the data relating to maximum ice thickness and decay (i.e. the decrease in ice thickness) is examined. Ice thickness curves...

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Bibliographic Details
Main Author: Bilello,Michael A.
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1980
Subjects:
Snow
Ice and Permafrost
*ICE
TEMPERATURE
THICKNESS
CANADA
ALASKA
ATMOSPHERIC TEMPERATURE
SEASONAL VARIATIONS
RIVERS
LAKES
DECAY
SEA ICE
ARCTIC REGIONS
ICE BREAKUP
PE61101A
AS91D
PE62730A
AST42
WU002
Arctic
Canada
Ice
permafrost
Sea ice
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADA084488
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA084488
Description
Summary:Weekly measurements of the thickness of lake, river and fast sea ice made over a period of 10 to 15 years at 66 locations in Canada and Alaska are analyzed, and the portion of the data relating to maximum ice thickness and decay (i.e. the decrease in ice thickness) is examined. Ice thickness curves revealed individual patterns of ice decay, and comparisons between locations disclosed major contrasts in the amount of ice accretion and the times of maximum ice and ice clearance. Although many factors affect the ice decay process, this study investigates in detail the effect of thawing temperatures. Concurrent measurements of the air temperature at each location made it possible to analyze the relationship between accumulated thawing degree-days (ATDD) and ice cover decay. Other factors affecting ice ablation and breakup, such as snow-ice formation, snow cover depth, solar radiation and wind are also discussed. (Author)

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