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首页> 美国政府科技报告 >Impact of CO sub 2 on the Climate Change in North America During the 20th Century. Final Report, August 1, 1984-July 31, 1985
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Impact of CO sub 2 on the Climate Change in North America During the 20th Century. Final Report, August 1, 1984-July 31, 1985

机译：二氧化碳对二十世纪北美气候变化的影响。最终报告，1984年8月1日至1985年7月31日

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The geographic and seasonal pattern of changes in the mean maximum, minimum and average surface air temperature, as well as precipitation over North America between 1941 and 1980 was examined. An analysis of the data revealed a statistically significant decrease in the temperature range, particularly in summer and early autumn. The decrease in the range appears to be associated with increasing precipitation at many stations. However, further statistical tests have shown that increased precipitation, and by inference, atmospheric water vapor and cloud cover can not fully account for the large number of stations with a decreased range. Using climate division data over the United States, a recent increase in spring and summer temperature of approx.1 deg C and decrease in precipitation by 20 to 40% was found for the Central and Northern Great Plains. Comparisons of urban/rural station pairs in North America revealed an annual mean relative warming of the urban sites of between 0.12 and 0.15 deg C/decade. 9 refs. (ERA citation 11:017225)

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