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冰川冻土  2005 

中国大陆对全球变暖响应的区域敏感性分析

, PP. 827-832

Keywords: 温度变化,区域响应,敏感性,纬度位置,地形,中国

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Abstract:

依据分辨率为0.5°×0.5°经纬度的网格数据,运用Mann-Kendall法对中国大陆各地在20世纪温度变化进行了分析.结果显示有两次明显的升温事件,分别发生在20年代初到40代中期(第一次升温事件)和70年代中期以来(第二次升温事件);对比各地对全球升温响应的突变时间,发现在中国大陆的响应规律为沿经线方向,大约35°N附近为两次升温事件的分界线,以它为界,第一次升温事件中温度转折时间向低纬度不断提早,在第二次升温事件中,升温突变时间越向高纬度地区越提早;在纬线方向上,中国东部地区对升温响应的时间突变点基本一致,但在青藏高原及其周围地区,由于受特殊的高原气候的影响,升温时间突变迥然不同.青藏高原大大提前了其西部和西北地区对全球升温的响应时间,同时它又推迟了其西南地区对全球升温响应的时间.通过分析发现,升温机制不同,温度变化区域响应的敏感性主要是纬度位置和地形因素综合影响的结果,而纬度位置是制约区域温度变化敏感性的主导性因素.

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