RECENT SECULAR TRENDS OF SURFACE AIR TEMPERATURES IN HIGH LATITUDES OF THE NORTHERN HEMISPHERE

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概要

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• CLINO (Climatological Normals) 1931-1960 and CLINO 1951-1980 compiled by the Japan Meteorological Agency are used to detect seasonal and annual secular trends in the north polar regions. World Weather Record series by U. S. Weather Bureau and NOAA are also used to analyze the interannual variation of surface air temperatures in this region. The results are as follows : 1) There is a prevailing cooling trend in the latter period during 1931-1980. Remarkable negative temperature anomalies are observed especially over Arctic west Siberia near the Kara Sea. 2) A decreasing trend of surface air temperature at Ostrov Dikson near the Kara Sea is remarkable. The temperature has not recovered to the level of the 1940s in recent years. 3) It is important to remove the impact of rapid urbanization from the the temperature record, especially south of 60°N, because we must understand real atmospheric temperature difference between low and high latitudes, and detect the impact on atmospheric circulation of the so-called greenhouse effect.

• 国立極地研究所の論文

著者

• Tsuchiya Iwao

  Faculty of Agriculture, Kagawa University

関連論文

• Unusual retreat and advance of polar air mass over Mt. Chokai based on 8000-hour temperature records beneath the very deep snow cover from two memory-type thermometers during 1986/87
• RECENT SECULAR TRENDS OF SURFACE AIR TEMPERATURES IN HIGH LATITUDES OF THE NORTHERN HEMISPHERE

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