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	青藏高原各拉丹冬冰芯记录的季节气温变化
其他题名	Seasonal Air Temperature Variations Retrieved from a Geladaindong Ice Core, Tibetan Plateau
	张拥军; 康世昌; 秦大河; 任贾文; 张玉兰
发表日期	2007
ISSN	0375-5444
卷号	62 期号:5 页码:501-509
中文摘要	2005年10-11月中美联合考察队在各拉丹冬峰北部果曲冰川平坦的粒雪盆(33°34′37.8N,91°10′35.3E,5720 m a.l.)钻取了一支冰芯,通过对该冰芯进行多参数定年,恢复了青藏高原中部各拉丹冬地区近70年来降水中delta_(18O)的变化历史.根据冰芯中季风期和非季风期delta_(18O)值与临近气象台站气温的正相关性,重建了该地区70年来的春季和夏季的气温变化.结果表明,各拉丹冬冰芯中delta_(18O)记录的春季和夏季升温趋势非常明显;根据回归分析,冰芯中非季风期的delta_(18O)每增大(或减小)1相当于春季气温升高(或降低)1.3℃;季风期的delta_(18O)每增大(或减小)1相当于夏季气温升高(或降低)0.4℃;各拉丹冬冰芯中delta_(18O)记录恢复的春季和夏季气温与北半球春季和夏季的气温变化具有一致的趋势,但各拉丹冬地区的增温幅度比北半球要大,同时春季的增温幅度也高于夏季.
英文摘要	A 70-year history of precipitation delta_(18O) record has been retrieved using an ice core drilled from a plat portion of the firn area in the Guoqu Glacier (33o34'37.8"N,91o10'35.3"E,5720 m a.s.l.) on Mt. Geladaindong (the source region of the Yangtze River) during October and November,2005. Based on the seasonality of delta18O records and the significant positive relationships between monsoon/non-monsoon delta_(18O) values and summer/spring air temperature from the nearby meteorological stations,the history of summer and spring air temperature have been reconstructed for the last 70 years. The results show that both summer and spring air temperature variations present similar trends during the last 70 years. Regression analysis indicates that the slope of the temperature-delta_(18O) relationship is 1.3 oC/ for non-monsoon delta_(18O) values and spring air temperature,and 0.4 oC/ for monsoon delta_(18O) values and summer air temperature. Variation of air temperature recorded in the ice core is consistent with that in the Northern Hemisphere (NH),however,the warming trend in the Geladaindong region is more intense than that in the NH,reflecting a higher sensitivity to global warming in the high elevation regions. In addition,warming trend is greater in spring than in summer.
关键词	冰芯delta~(18)O 春季夏季气温变化各拉丹冬峰青藏高原
英文关键词	ice core delta~(18)O;summer;spring;air temperature variations;Mt. Geladaindong;Tibetan Plateau
语种	中文
来源期刊	地理学报
来源机构	中国科学院西北资源环境生态研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/89721
推荐引用方式 GB/T 7714	张拥军,康世昌,秦大河,等. 青藏高原各拉丹冬冰芯记录的季节气温变化[J]. 中国科学院西北资源环境生态研究院,2007,62(5):501-509.
APA	张拥军,康世昌,秦大河,任贾文,&张玉兰.(2007).青藏高原各拉丹冬冰芯记录的季节气温变化.地理学报,62(5),501-509.
MLA	张拥军,et al."青藏高原各拉丹冬冰芯记录的季节气温变化".地理学报 62.5(2007):501-509.