Call number:
ZSP-202-319
In:
Research report
Description / Table of Contents:
CONTENTS: Preface. - Introduction. - Previous studies. - The central Alaska region. - Suitability of selected study area. - Data availability. - General winter climatic conditions. - Winter air masses and fronts. - Northern Hemisphere sources. - Air masses affecting Alaska. - Air mass modifications and resulting weather. - Winter fronts. - Frequency and movement of fronts. - Effects of locations of fronts. - Results of fronts. - Climatic data. - Source material. - Precipitation types and descriptions. - Data reduction procedures. - Data analysis. - Precipitation frequency. - Number of storms and their duration. - Concurrent climatic conditions. - Air masses, fronts and climatic relationships. - Snow and snow showers. - Rain and freezing rain. - Water droplet fog and ice fog. - Drifting and blowing snow. - Conclusions and discussion. - Literature cited. - Abstract.
Description / Table of Contents:
The physical, meteorological and climatological aspects of freezing precipitation in the Tanana River Basin of central Alaska are examined. Periods of inclement weather are evaluated with respect to frequency and duration, and concurrent temperature, wind, atmospheric pressure and visibility conditions. Although relatively dry polar continental air masses dominate the area in winter, massive intrusions of maritime air occasionally produce a major snow storm and, in rare instances, rain or freezing rain. Because of the surrounding mountain ranges, snow occurs most often when the atmospheric pressure is rising and the winds are from the west. Ice fogs are observed at temperatures below -21 F, and very few water-droplet fogs are reported at temperatures below -31°F. The relationships between air masses, fronts and local climatic influences may be used in forecasting winter precipitation in central Alaska. The statistical survey presented also contributes new information on winter weather conditions in this region.
Type of Medium:
Series available for loan
Pages:
v, 51 Seiten
,
Illustrationen
Series Statement:
Research report / Cold Regions Research and Engineering Laboratory, CRREL, US Army Material Command 319
URL:
http://www.worldcat.org/oclc/1014532
Branch Library:
AWI Library
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