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CR 17:45-53 (2001)
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Abstract
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Nature of observed temperature changes across the United States during the 20th century
Paul C. Knappenberger1,*, Patrick J. Michaels2, Robert E. Davis2
1New Hope Environmental Services, Charlottesville, Virginia 22903, USA
2Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia 22903, USA
*E-mail: pck4s@nhes.com
ABSTRACT: The annual temperature history of the United States during the 20th century shows 3 distinct periods of change: warming from 1900 until about 1940, cooling from 1940 to 1969, and warming from 1970 to the present. The characteristics of daily
temperature change during these 3 periods are very different. The first 2 periods are marked by a tendency toward more temperature extremes--higher extreme maxima during the first period, and lower extreme minima during the second. In contrast, the warming
during the most recent period, often used as evidence of human-induced climate change, is characterized by temperature moderation--the pattern of temperature rise exhibits a strong, preferential warming of the coldest days of the year.
KEY WORDS: Climate change · Daily temperature trends · United States
Full text in pdf format
Published in CR Vol.
17, No. 1
(2001) on July 4
Print ISSN: 0936-577X; Online ISSN: 1616-1572.
Copyright © Inter-Research, Oldendorf/Luhe, 2001
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