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	19602010年甘肃省不同气候区SPI与Z指数的年及春季变化特征
其他题名	Variation characteristics of annual and spring standardized precipitation index and Z index in different climate regions of Gansu Province, Northwest China in 1960-2010
	陈丽丽; 刘普幸; 姚玉龙; 朱晓娟; 赵敏丽
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2013
卷号	32 期号:3 页码:704-711
中文摘要	根据甘肃省19602010年26个气象站点的日降水资料,利用标准化降水指标(SPI)和Z指数,对比分析了51年来甘肃省不同气候区年及春季干旱的变化特征。结果表明:甘肃省年SPI和Z指数总体为河西冷、暖气候区及祁连山区呈增加趋势,其中河西西部暖温带干旱区增加幅度最大,SPI和Z指数变化倾向率均为0.13·(10a)~(-1);陇中南、北气候区及甘南区呈降低趋势,以陇中南部冷温带半湿润区减小幅度最大,SPI为-0.13·(10a)~(-1),Z为-0.14·(10a)~(-1)。初春的干旱等级变化呈降低趋势,陇中南部冷温带半湿润区降低幅度最大,SPI为-0.12·(10a)~(-1),Z为-0.06·(10a)~(-1);春季SPI和Z指数与年变化趋势一致。年代际变化为河西60年代、河东90年代出现严重干旱。不同气候区变化不同,河西冷、暖气候区及祁连山区的干旱指数变化率为正值,干旱程度减小,春季干旱弱于年变化,而陇中南、北气候区及甘南区则为负值,干旱程度增加,春季干旱强于年变化。甘肃省干旱的空间分布差异性显著,表现为自西北向东南递增的趋势。
英文摘要	Based on the 1960 - 2010 daily precipitation data from 26 meteorological stations in Gansu Province of Northwest China,and by using standardized precipitation index (SPI) and Z index,this paper analyzed the variation characteristics of the annual and spring drought in different climate regions of the Province in recent 51 years. Overall,the annual SPI and Z index in the Province presented an increasing trend in the cool and warm climate regions of Hexi and in the Qilian Mountains,with the greatest increment in the arid areas of western warm temperate zone in Hexi,and the change tendency rate of both SPI and Z index being 0. 13·(10a)~(- 1),and a decreasing trend in the semi-humid region of southern cold temperate zone of Longzhong,semiarid region of northern cold temperate zone of Longzhong,and humid region of alpine Gannan, with the greatest decrement in the semi-humid region of southern cold temperate zone of Longzhong, and the change tendency rate of SPI and Z being - 0. 13·(10a)~(- 1) and - 0. 14· (10a)~(- 1),respectively. The drought degree in early spring showed a decreasing trend,with the greatest decrement in the semi-humid region of southern cold temperate zone of Longzhong,and the change tendency rate of SPI and Z being - 0. 12·(10a)~(- 1) and - 0. 06·(10a)~(- 1),respectively. The annual and spring SPI and Z index had the same variation trends. Severe drought occurred in Hexi in the 1960s and in Hedong in the 1990s. In the cool and warm climate regions of Hexi and in the Qilian Mountains,the change rate of drought index was positive,the drought de-gree decreased,and the change degree of spring drought was smaller than that of annual drought; whereas in the semi-humid region of southern cold temperate zone of Longzhong,semi-arid region of northern cold temperate zone of Longzhong,and humid region of alpine Gannan,the change rate of drought index was negative,the drought degree exacerbated,and the change degree of spring drought was greater than that of annual drought. In the Province,there was an obvious difference in the spatial distribution of drought,with an increasing trend from northwest to southeast.
中文关键词	甘肃省 ; 干旱 ; 标准化降水指标 ; Z指数
英文关键词	Gansu Province drought standardized precipitation index (SPI) Z index
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOGRAPHY
WOS研究方向	Geography
CSCD记录号	CSCD:4798367
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230059
作者单位	西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	陈丽丽,刘普幸,姚玉龙,等. 19602010年甘肃省不同气候区SPI与Z指数的年及春季变化特征[J]. 西北师范大学,2013,32(3):704-711.
APA	陈丽丽,刘普幸,姚玉龙,朱晓娟,&赵敏丽.(2013).19602010年甘肃省不同气候区SPI与Z指数的年及春季变化特征.生态学杂志,32(3),704-711.
MLA	陈丽丽,et al."19602010年甘肃省不同气候区SPI与Z指数的年及春季变化特征".生态学杂志 32.3(2013):704-711.