A statistical investigation of the diurnal temperature variation during the polar night at McMurdo Sound, Antarctica

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Author
Barrigar, Donald B.
Date
1963Advisor
van der Bijl, W.
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Show full item recordAbstract
It Is observed that normally, during the polar night, 24-
hour periods with a clear sky and light to moderate winds have
their lowest temperatures in the middle of the period, and the
highest temperatures occur at the beginning and end. For
cloudy and windy periods, the shape of the temperature curve
is reversed, with the maximum temperature occurring near the
middle of the period. Despite many efforts by various investigators
no physical explanation could be found for this variation. Hisdal discovered that for clear skies and low wind speed,
the same shape of temperature variation curve occurs, whether
the starting time is 0000 hr, 1200 hr, or 1400 hr. Thus, the
abnormal behavior of the temperature variation appears to be
influenced primarily by the statistical bias involved in the
selection criteria. This investigation, using six years of surface data, divides
the diurnal temperature variation for various special
types of days into two parts, the meteorological or diurnal
variation and the superimposed statistical bias. Finally, the
meteorological diurnal temperature variation, based upon all
observations during the six year period, is determined. The writer wishes to express his appreciation for the
advice and guidance given him by Professor W. van der Bijl of
the U. S. Naval Postgraduate School in this investigation.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
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