| 20世纪两次全球增暖事件的比较 |
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| 引用本文： | 曾昭美,严中伟,叶笃正.20世纪两次全球增暖事件的比较[J].气候与环境研究,2003,8(3):319-330. |
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| 作者姓名： | 曾昭美 严中伟 叶笃正 |
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| 作者单位： | 中国科学院东亚区域气候-环境重点实验室,中国科学院大气物理研究所全球变化东亚中心,北京,100029 |
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| 基金项目： | 国家科技部973项目G999043400 |
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| 摘 要： | 20世纪20年代和70年代全球出现了两次突变增暖,本文分析比较了这两次全球增暖的起源地,空间分布特点,影响范围,以及北半球增温和降温最大地区的气温变化与其相对应的大气环流变化的联系等.发现,第一次全球增暖始于北半球新地岛西北、冰岛及以北的极地地区,主要增暖区在北大西洋、格陵兰岛、冰岛和北半球中、高纬大陆地区,主要增暖季节是夏季.第二次全球增暖最早可能始于南半球南印度洋海盆及南极大陆地区,增暖中心有明显向北半球方向移动的倾向并广泛影响到全球热带、副热带海洋,没有明显的区域和季节增暖差异;北半球第二次增暖比南半球约晚10年,主要增温区在东亚大陆和北美西部,主要增暖季节在冬季.分析还发现,20世纪北半球增暖最强的东亚大陆、北美西北部和降温显著的冰岛、格陵兰岛、北大西洋以及中北太平洋等地的气温变化与其相应的大气环流系统的异常变化关系密切.
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| 关 键 词： | 全球增暖 大气环流 增暖源地 增暖过程 |
| 修稿时间： | 2002年7月11日 |
Two Global Warming Events in the 20th Century |
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| Zeng Zhaomei,Yan Zhongwei and Ye Duzheng.Two Global Warming Events in the 20th Century[J].Climatic and Environmental Research,2003,8(3):319-330. |
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| Authors: | Zeng Zhaomei Yan Zhongwei and Ye Duzheng |
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| Abstract: | In the last century, two rapid warmingevents of the globe occurred around the 1920s and the 1970s, respectively. This paper analysis their geographic origins, spatial distribution character, areas of influence and possible relations between the temperature changes in the typical regions and the related changes in the atmospheric circulation. Results show that (1) the first rapid warming was originated from northern high-latitudes, especially the zone from Novaya Zemlya Archipelago to Iceland; and warming mainly occurred in the North Atlantic and northern continents; and (2) the second warming developed from southern high\|latitudes, especially the southern Indian Ocean and Antarctic; and tended to propagate northwards to the subtropics and tropics. Analyses also show that in the 20th century the prominent warming in East Asia and western North America and the cooling in the northern North Atlantic and northern central Pacific are closely related to the changes in atmospheric circulation systems. |
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| Keywords: | global warming atmospheric circulation geographic origin of warming warming process |
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