河西走廊近57年来干旱灾害特征时空演化分析

	河西走廊近57年来干旱灾害特征时空演化分析
其他题名	Analysis of Temporal and Spatial Evolution Characteristics of Drought Disasters in the Hexi Corridor in Recent 57 Years
	王春林 1; 司建华 2; 赵春彦 3; 李培都 4; 张经天 5
	2019
发表期刊	高原气象
ISSN	1000-0534
卷号	38 期号:1 页码:196-205
摘要	Drought is one of the most universal meteorological disasters in China. The occurrence of drought will adversely affect agriculture and ecological environment. In the context of global warming,the drought has become a major challenge facing the world. The Hexi Corridor is an important ecological barrier in the northwest of China. Due to its unique geographical and climatic conditions,the Hexi Corridor is a region that drought happens frequently. The frequent occurrence of drought has become an important factor restricting local agricultural and the utilization of water resources. The SPI index can quantify the precipitation deficit for multiple timescales, which can reflect the impacts of drought on different water resources needed by various decision-makers. It has been widely used in practice. Therefore,based on the monthly precipitation data of 15 meteorological stations in Hexi Corridor and its surrounding areas from 1960 to 2016,this paper uses the standardized precipitation index to characterize the annual and seasonal drought grades,analyzing the evolution of drought frequency,the station proportion of drought and drought intensity in Hexi Corridor. Its aim is to reveal the regularity of drought and provide reference for the prevention of drought disaster in Hexi corridor. The results show that: (1) In the past 57 years,the station proportion of drought in annual,spring,summer and winter showed a decreasing trend in Hexi Corridor,the station proportion of drought in autumn showed an insignificant increase. Among them,the biggest drops of the station proportion of drought was in summer. The frequency of large-scale drought in spring and autumn was higher than 29. 8%. (2) The drought intensity of the Hexi Corridor showed a decreasing trend at the annual and seasonal scales,among which the drought intensity in summer had the largest decrease. The drought intensity in the study area was dominated by mild drought and moderate drought. (3) The spatial distribution of drought has obvious regional characteristics,among which the drought of Jiuquan and Yumen were frequently. From the linear trend of the SPI index,66. 7% of the stations in the Hexi Corridor showed a decreasing trend on the annual and seasonal scales. The weakening of the drought is conducive to local agricultural and ecological environment. However,the precipitation and temperature in the Qilian Mountains and Hexi Corridor have both increased in the past few decades,this will lead to a greater possibility of local heavy rains and mountain flood disaster in the Hexi Corridor. Therefore,it is necessary to strengthen the defense of rainstorm and flood disasters at the same time of drought resistance.
其他摘要	根据1960-2016年河西走廊及其周边地区15个气象站点的逐月降水系列数据,采用标准化降水指数表征年、季的干旱等级,分析了河西走廊的15个气象站点的干旱频率、干旱站次比和干旱强度的演化趋势。结果表明:(1)近57年来,河西走廊地区年尺度、春季、夏季和冬季的干旱站次比均呈减小趋势,秋季干旱站次比呈现出不显著的增加趋势,其中春季和秋季全域性干旱发生的频率都高于29. 8%;(2)河西走廊地区年尺度和四季的干旱强度均呈减小趋势,研究区的干旱强度主要以轻度干旱和中度干旱为主;(3)干旱的空间分布具有明显的区域特征,其中酒泉和玉门是干旱频发地区,河西走廊地区有66. 7%的站点在年和季节尺度上都呈干旱减弱的趋势。干旱的减弱有利于当地的农业生产和生态环境,但是在气候变化的背景下,河西走廊地区局地暴雨和山洪灾害发生的可能性变大,要在抗旱的同时加强洪涝灾害的防御。
关键词	河西走廊干旱灾害 SPI指数时空演化 Hexi Corridor drought disaster SPI index spatial and temporal evolution
收录类别	CSCD
语种	中文
WOS关键词	Meteorology & Atmospheric Sciences
WOS研究方向	Science & Technology
WOS类目	METEOROLOGY ATMOSPHERIC SCIENCES
CSCD记录号	CSCD:6437517
引用统计	被引频次：15[CSCD] [CSCD记录]
文献类型	期刊论文
专题	任务一_子任务一循证社会科学证据集成任务一
作者单位	1.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院内陆河流域生态水文重点实验室;;, 兰州;;, 甘肃;;北京 730000;;100049, 中国 2.中国科学院西北生态环境资源研究院, 中国科学院内陆河流域生态水文重点实验室, 兰州, 甘肃 730000, 中国 3.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院内陆河流域生态水文重点实验室;;, 兰州;;, 甘肃;;北京 730000;;100049, 中国 4.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院内陆河流域生态水文重点实验室;;, 兰州;;, 甘肃;;北京 730000;;100049, 中国 5.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院内陆河流域生态水文重点实验室;;, 兰州;;, 甘肃;;北京 730000;;100049, 中国
推荐引用方式 GB/T 7714	王春林,司建华,赵春彦,等. 河西走廊近57年来干旱灾害特征时空演化分析[J]. 高原气象,2019,38(1):196-205.
APA	王春林,司建华,赵春彦,李培都,&张经天.(2019).河西走廊近57年来干旱灾害特征时空演化分析.高原气象,38(1),196-205.
MLA	王春林,et al."河西走廊近57年来干旱灾害特征时空演化分析".高原气象 38.1(2019):196-205.