| 首都圈典型沙区近40余年气候变化特征简析——以张北、怀来、丰宁3县为例 |
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| 引用本文： | 刘林山,张镱锂,郑度.首都圈典型沙区近40余年气候变化特征简析——以张北、怀来、丰宁3县为例[J].地理科学进展,2002,21(4):318-326. |
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| 作者姓名： | 刘林山 张镱锂 郑度 |
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| 作者单位： | 中国科学院地理科学与资源研究所,北京,100101 |
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| 基金项目： | “十五”国家科技攻关计划重大项目 (2 0 0 2 BA51 7A- 1 1 - 4 ) |
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| 摘 要： | 采用张北、丰宁、怀来建站以来气象资料 (气温、地表温度、降水、风速 ) ,分析了研究区 40余年的气候变化特征。结果表明 :2 0世纪 70年代以来研究区温度上升的速度持续增加 ;其中 1 985年是研究区气候变化的一个转折点 ,1 985年以前气候变化幅度较大 ,1 985年以后变化趋于稳定。
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| 关 键 词： | 首都圈 气候变化 张北 怀来 丰宁 |
| 文章编号： | 1007-6301(2002)04-0318-09 |
| 收稿时间： | 2002-06-01 |
| 修稿时间： | 2002-06-01 |
Climate Change Character in the Special Sand Area of the Areas Encircling Beijing: A Case Study on the Counties of Zhangbei,Huailai and Fengning |
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| LIU Lin shan,ZHANG Yi li,ZHENG Du.Climate Change Character in the Special Sand Area of the Areas Encircling Beijing: A Case Study on the Counties of Zhangbei,Huailai and Fengning[J].Progress in Geography,2002,21(4):318-326. |
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| Authors: | LIU Lin shan ZHANG Yi li ZHENG Du |
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| Institution: | Institute of Geographical Sciences and Natural Resources Research,CAS, Beijing 100101 China |
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| Abstract: | People pay much attention to the desertification since sandstorms frequently happened in north China recent years. It is well known that desertification is mainly caused by human activities and natural factors, especially the climate changes. Based on daily climatic data of the metrological stations since the establishment of them, the climate changes of the Zhangbei, Fengning and Huailai were analyzed in this study. Slip average of five years was taken to analyze the change of the climate elements and a regression equation was made to see the speed of temperature increasing in last 40 years. The average temperature in different seasons by decades was also calculated and maps of evolution of the monthly mean temperature anomaly were made by Arcview software. Main conclusion can be drawn: (1) The air temperature keep increasing with the average velocity of 0.04 degree per year in last 40 years. And the speed of temperature increase keeps increasing after 1970s. It shows that the temperature increasing is mainly happened in the winters and the temperature change in winter is much larger then other seasons. The change of land surface temperature is similar to air temperature but with larger changes between years, especially in summer. (2) 1985 is a special year, before it the climate change is much more fluctuate (the extent of change rate of average temperature precipitation and wind speed is -29%~13%, -50%~48% and -16%~37%), after it the change is stable (the extent of change rate of average temperature precipitation and wind speed is 22%~28%, -43%~46% and -23%~-1%), the temperature of air and land surface keep increasing continuously. (3) The precipitation in year is mainly control by summer. It decreased before 1985, after that it increased a little but still less then before. The precipitation in summer keep decreasing before 1990s, but the speed of decrease keeps decrease and after 1990s the precipitation increased. The change rate of precipitation is most obviously in winter. The precipitation in April, March and November in the last decade is much less then the average, while it is reversed in December. (4) The wind speed has a negative correlation to the temperature. The speed of wind decreased while the temperature increased, which impact the desertification in opposite way. |
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| Keywords: | areas encircling Beijing climate change Zhangbei Huailai Fengning |
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