基于SPEI指数的内蒙古多时空尺度干旱特征分析

谢 岷; 高聚林; 孙继颖; 于晓芳; 王志刚; 胡树平; 张 璐

引用本文:	谢岷,高聚林,孙继颖,等.基于SPEI指数的内蒙古多时空尺度干旱特征分析[J].灌溉排水学报,2022,41(6):140-146.
	XIE Min,GAO Julin,SUN Jiying,et al.基于SPEI指数的内蒙古多时空尺度干旱特征分析[J].灌溉排水学报,2022,41(6):140-146.

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基于SPEI指数的内蒙古多时空尺度干旱特征分析
谢岷，高聚林，孙继颖，于晓芳，王志刚，胡树平，张璐
1.内蒙古农业大学农学院，呼和浩特 010019；2.内蒙古农业大学图书馆，呼和浩特 010018

摘要:

【目的】分析内蒙古地区1951—2018年的多时空尺度干旱变化特征，为该地区农业生产科学减灾提供理论依据。【方法】基于1951—2018年内蒙古地区50个基准地面气象观测站的连续日值气象数据，采用标准化降水蒸散指数（SPEI）和Mann-Kendall趋势检验分析方法研究了内蒙古不同时空尺度干旱演化特征。【结果】时间上，1979年前后是内蒙古地区气候变化的一个关键突变点，大部分地区干旱有所缓解，逐步进入湿润转变期，但内蒙古西部地区自1996年前后又进入新一轮干旱期。空间上，内蒙古中西部和赤峰、通辽的部分地区干旱形势较为严峻。【结论】SPEI指数可以较好地表征内蒙古长期的干旱变化特征。

关键词: 标准化降水蒸散指数；时空变化；干旱；内蒙古

DOI：10.13522/j.cnki.ggps.2020573

分类号:

基金项目:

Spatiotemporal Variation of Drought in Inner Mongolia Estimated Based on the Standardized Precipitation Evapotranspiration Index

XIE Min, GAO Julin, SUN Jiying, YU Xiaofang, WANG Zhigang, HU Shuping, ZHANG Lu

1. College of Agronomy, Inner Mongolia Agricultural University, Hohhot 010019, China; 2. Library of Inner Mongolia Agricultural University, Hohhot 010018, China

Abstract:

【Objective】Global warming is expected to increase the frequency of extreme weathers such as flooding and drought. Understanding their spatiotemporal variation is important to help mitigate its detrimental impact. The purpose of this paper is to analyze the spatiotemporal variation of drought in Inner Mongolia of China. 【Method】The analysis was based on meteorological data measured from 1951 to 2018 from 50 weather stations across the region. The occurrence and severity of the drought was quantified using the standardized precipitation evapotranspiration index (SPEI). 【Result】An abrupt climate change occurred around 1979. Since then, most areas in the region have seen an ease of drought stress. Since 1996, however, western Inner Mongolian have seen a return of the drought. Spatially, severe droughts occurred mainly in central-western Inner Mongolia, and southern Chifeng and Tongliao. 【Conclusion】SPEI can be used as an index to quantify drought at provincial scale. Its application to Inner Mongolia reveals that the province has undergone alternate drought and humidified climate since 1951. Drought occurred more frequently and severely in the central-western province than in other areas.

Key words: standardized precipitation evapotranspiration index; spatiotemporal variation; drought; Inner Mongolia