干旱区生态环境知识资源中心(Arid): 1961-2008年中国西北东部旱涝异常分布及干旱变化特征

Arid

	1961-2008年中国西北东部旱涝异常分布及干旱变化特征
其他题名	Anomaly distribution of drought-flood and changing characteristics of arid over eastern northwest China during 1961-2008
	赵红岩 1; 王有恒 2; 王兴 2; 谭丹 3
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2012
卷号	35 期号:4 页码:552-558
中文摘要	应用主成分分析和旋转主成分分析方法,利用陕、甘、宁、青四省(区)170个测站,对1961-2008年大气干旱指数S=DeltaT/deltaT-DeltaR/deltaR的地域相关和年际变化特征进行了分析。结果表明:西北地区东部旱涝异常在空间上表现为较高的整体一致性,其次表现为东西相反和南北相反的变化趋势。西北地区东部旱涝异常存在三个基本相关的区域:甘肃东南部及陕西、河西走廊及河套地区、青海区。50 a来,各区在1974-1977年间和1982-1985年间湿润多雨,1994年以后相对少雨干旱。进一步分析发现,研究区域中西部尽管降水是增加的,但干旱指数变化不明显,而区域东部地区干旱指数变化很明显,说明区域中西部地区变湿不明显,而区域东部暖干化趋势明显。
英文摘要	Based on the data of 170 stations in the area of Shaanxi,Gansu,Ningxia and Qinghai Provinces of northwest China from 1961 to 2008,the regional interconnection and the inter-annual variability of the atmospheric aridity index were analyzed in this paper.The change trend of regional interconnection and inter-annual variability was analyzed with method of principal component and rotated principal component.The results show that the large value zone of spatial distribution of annual-aridity index in northwest China is consistent with areas from Ningxia to central Gansu,from Dingxi to Longxi,Wushan,Lixian,Wudu and Wenxian,as well as in the dry tongue of the northeast Qinghai-Tibet Plateau.The uniformity of drought and flood abnormities is high in spatial distribution and the first principal component of variance accounts for about 64.6% of the total variance.According to the distribution of loading vector of rotated principal component and their interconnection,three correlative regions of drought and flood abnormities might be approximately divided in the east part of northwest China: the southeast of Gansu and Shaanxi,Gansu corridor and Hetao area,and Qinghai area.In recently 50 years,all region reflected wet and rainy situation during 1974 to 1977 and 1982 to 1985,but dry situation since 1994.The further analysis found that the trend of the climate change shows that the aridity in the east part of northwest China is not an isolated phenomenon.The precipitation is increasing,but the change of the aridity index is unobvious in the Midwest region,which shows the trend of turning wet is unobvious.On the other hand,the change of the aridity index is obvious in the east part,which shows that the trend of turning warming and drying is obvious.
中文关键词	中国西北东部 ; 正交旋转主成分分析 ; 干旱指数 ; 地域相关 ; 年际变化
英文关键词	northwest area of China EOF REOF aridity index regional teleconnection annual variation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:4638030
来源机构	中国气象局兰州干旱气象研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228000
作者单位	1.中国气象局兰州干旱气象研究所, 甘肃省干旱气候变化与减灾重点试验室;;中国气象局干旱气候变化与减灾重点开放实验室, 兰州, 甘肃 730020, 中国; 2.西北区域气候中心, 兰州, 甘肃 730020, 中国; 3.兰州中心气象台, 兰州, 甘肃 730020, 中国
推荐引用方式 GB/T 7714	赵红岩,王有恒,王兴,等. 1961-2008年中国西北东部旱涝异常分布及干旱变化特征[J]. 中国气象局兰州干旱气象研究所,2012,35(4):552-558.
APA	赵红岩,王有恒,王兴,&谭丹.(2012).1961-2008年中国西北东部旱涝异常分布及干旱变化特征.干旱区地理,35(4),552-558.
MLA	赵红岩,et al."1961-2008年中国西北东部旱涝异常分布及干旱变化特征".干旱区地理 35.4(2012):552-558.