气候变化领域集成服务门户(CCPortal): 亚洲中部干旱区在20世纪两次暖期的表现

CCPortal

	亚洲中部干旱区在20世纪两次暖期的表现
其他题名	The Response to Two Global Warming Periods in the 20th Century over the Arid Central Asia
	王劲松; 陈发虎; 靳立亚; 魏锋
发表日期	2008
ISSN	1000-0240
卷号	30 期号:2 页码:224-233
中文摘要	利用亚洲中部干旱区1901-2002年近100 a气温及北半球海平面气压、冬季西伯利亚高压强度指数、西风指数资料,分析了20世纪全球变暖的两个较明显时期在该干旱区的响应特征,以及大气环流变化和太阳活动对干旱区气温异常的影响.结果表明:亚洲中部干旱区对20世纪全球发生的两次暖期的响应特征是有显著差异的.对1920-1940年代全球发生的第一次暖期,亚洲中部干旱区整体并没有响应,仅在其东部的季风影响边缘区有响应;而对1970年代以后发生的第二次暖期,亚洲中部干旱区整体都作出了响应.冰岛低压的异常加深、同时北大西洋亚速尔高压的显著增强,西伯利亚高压强度指数的异常减弱,以及西风指数的异常增强是导致亚洲中部干旱区气温偏高的可能原因,可以初步解释研究区整体对20世纪全球两次暖期响应不同的原因.太阳活动作为外部影响因子之一,对干旱区气温的影响是阶段性的,且在百年时间尺度上,二者并没有显著的相关性.
英文摘要	Based on the data of temperature in the arid Central Asia, the North Hemispheric sea level pressure （SLP）, the winter index of Siberian high and the westerly （zonal） index （ZIM） from 1901 to 2002, the response to global warming in this area in the 20th century and the main meteorological factors resulting in temperature anomaly are analyzed. The analyses show that there are significant discrepancies of the response character between the two global warming periods in the 20th century over the arid Central Asia. For the first warming period from the 1920s to the 1940s, there was no single response in the whole arid area, except for the eastern marginal area, where monsoon is dominant. However, for the second warming period after 1970s, the whole arid area has an overall re-sponse. The abnormally deepened Icelandic depression, the substantially intensified high in the North Atlantic Azores, the anomalously reinforced Ural high＇s ridge, the obviously weakened index of the Siberian high and the singularly strengthened Z/M are the factors causing the higher temperature in the arid Central Asia. The above-mentioned factors can be used to explain the difference in the impacts of global warming on the arid central Asia between the 1920s-1940s and the 1970s-1990s. As one of the influencing non-atmosphere factors, the sun activity has periodic impact on the temperature over the arid Central Asia. But, there is no pronounced correlation between the sun activity and the temperature over the arid Central Asia in a century time scale.
关键词	亚洲中部干旱区 20世纪两次暖期响应影响因子
英文关键词	arid Central Asia;two warm periods of 20th century;response;influencing factors
语种	中文
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
CSCD记录号	CSCD:3244566
来源期刊	冰川冻土
来源机构	兰州大学 ; 中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/1683
推荐引用方式 GB/T 7714	王劲松,陈发虎,靳立亚,等. 亚洲中部干旱区在20世纪两次暖期的表现[J]. 兰州大学, 中国科学院青藏高原研究所,2008,30(2):224-233.
APA	王劲松,陈发虎,靳立亚,&魏锋.(2008).亚洲中部干旱区在20世纪两次暖期的表现.冰川冻土,30(2),224-233.
MLA	王劲松,et al."亚洲中部干旱区在20世纪两次暖期的表现".冰川冻土 30.2(2008):224-233.