中国近50年气温及降水量的变化趋势分析 |
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引用本文: | 左洪超,吕世华,胡隐樵.中国近50年气温及降水量的变化趋势分析[J].高原气象,2004,23(2):238-244. |
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作者姓名: | 左洪超 吕世华 胡隐樵 |
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作者单位: | 中国科学院,寒区旱区环境与工程研究所,甘肃,兰州,730000 |
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基金项目: | 国家重点基础研究发展规划项目(G1999043400),中国科学院知识创新工程方向性项目(KZCX3 SW 329)共同资助 |
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摘 要: | 通过对我同385个站的观测资料序列进行分析研究,得到我国气候变化的一些特征。近25年全国平均温度有明显的上升趋势,只有极少数测站有明显的降温趋势,华北及东北的广大地区是增温最快、范围最大的地区。全国平均降水量没有明显的变化趋势。逐站分析降水量的年际变化后发现,我国降水量的变化存在着明显的区域特征,新疆地区足降水量增加最快的地区;华中华北地区的降水则存在明显的减少趋势;这两个地区的、平均降水量都与全球海表温度距平有很好的相关性。文中还利用同期大气再分析资料(NCEP/NCAR)尝试分析了气候变化与大气环流特征的关系。
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关 键 词: | 气候变化 变化趋势 区域特征 大气环流 |
文章编号: | 1000-0534(2004)02-0238-07 |
Variations Trend of Yearly Mean Air Temperature and Precipitation in China in the Last 50 Years |
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Abstract: | Some characteristics of climate changes are gained by analyzing 385 Chinese Meteorological Stations Data (CMSD).The results show that the variations of annual mean air temperature of CMSDexcept for a few stations are obvious increase warming trend, North and Northeast China is annual mean air temperature rapid increasing and the warmest region. The China-averaged precipitation has no obvious trend. The analysis of variation of CMSD shows that the China precipitation varies with differentregions. The area-averaged precipitation is the increasing trend in most of Xinjiang, while the area-averaged precipitation is obvious decreasing trendin central andnorth China. Both the annual area-averaged precipitations have good correlations with global mean sea surface temperature. Theseclimate change characteristics are explained by general circulationof atmosphere with reanalysis data (NCEP/NCAR)in this paper. |
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Keywords: | Climate change Change trend Regionalcharacteristics General circulationof atmosphere |
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