Abstract
The regional patterns of change of temperature and rainfall that might accompany a global warming due to increased carbon dioxide can be studied by experiments with theoretical models of the climate system, by reconstructing the climates of past warm epochs, and by determining the anomalies of temperature and precipitation that prevailed during years or seasons when the Arctic region was unusually warm. The current study pursues the last course, making use of the northern hemisphere meteorological data record for the period 1931–1978. Hemispheric maps of anomalies of both temperature and precipitation are presented for the 10 warmest Arctic seasons and years, and for differences between the 5 warmest and 5 coldest consecutive Arctic winters. Wintertime anomalies are generally greatest and dominate in determining the annual averages. The hemispheric temperature anomalies for these data sets are similar to those determined earlier by the first author (Williams, 1980) using 1900–1969 data, but the precipitation anomalies (for North America alone) show more variation, partly due to the method of computing the anomalies.
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Work reported here begun while a visitor to the National Center for Atmospheric Research.
The National Center for Atmospheric Research is sponsored by the National Science Foundation.
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Jäger, J., Kellogg, W.W. Anomalies in temperature and rainfall during warm Arctic seasons. Climatic Change 5, 39–60 (1990). https://doi.org/10.1007/BF00144679
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DOI: https://doi.org/10.1007/BF00144679