干旱区研究

干旱区研究 >

2018 , Vol. 35 >Issue 2: 260 - 268

DOI: https://doi.org/10.13866/j.azr.2018.02.02

亚洲中部生态与环境

亚洲中部干旱区干湿时空变化特征

  • 胡增运 ,
  • 胡汝骥 ,
  • 周启鸣 ,
  • 陈曦 ,
  • 殷刚 ,
  • 钱静
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  • 1.中国科学院新疆生态与地理研究所,荒漠与绿洲生态国家重点实验室,新疆 乌鲁木齐 830011;
    2.中国科学院深圳先进技术研究院, 广东 深圳 518055;
    3.香港浸会大学,香港 999077;
    4.新疆大学信息科学与工程学院,新疆 乌鲁木齐 830046
胡增运(1984-),副研究员,博士,研究方向为气候变化,生态环境与生物数学模型.E-mail: huzengyun@ms.xjb.ac.cn
陈曦.E-mail: chenxi@ms.xjb.ac.cn

收稿日期: 2017-11-07

  修回日期: 2017-11-14

  网络出版日期: 2025-11-17

基金资助

国家国际科技合作项目(2010DFA92720); UNDP项目(0076478); 中国科学院西部青年学者项目(2015-XBQN-B20)资助

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Spatiotemporal Variation of Wetting or Drying in the Arid Regions in Central Asia

  • HU Zeng-yun ,
  • HU Ru-ji ,
  • ZHOU Qi-ming ,
  • CHEN Xi ,
  • YIN Gang ,
  • QIAN Jing
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  • 1. State Key Laboratory of Desert and Oasis Ecology,Xinjiang Institute of Ecology and Geography,Chinese Academy of Sciences,Urumqi 830011,Xinjiang,China;
    2. Shenzhen Institutes of Advanced Technologies,Chinese Academy of Sciences,Shenzhen 518055,Guangdong,China;
    3. Department of Geography,Hong Kong Baptist University,Kowloon Tong,Kowloon 999077,Hong Kong,China;
    4. College of Information Science and Engineering,Xinjiang University,Urumqi 830046,Xinjiang,China

Received date: 2017-11-07

  Revised date: 2017-11-14

  Online published: 2025-11-17

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摘要

过去一百年,全球增温已成不争的事实,而降水则表现出明显的区域特征。采用全球干旱指数(palmer drought severity index, PDSI),对亚洲中部干旱区1950—2014年干湿变化事件进行分析。结果表明:该区域呈现出变湿趋势,尤其在20世纪80年代后,这种趋势更加明显。对PDSI指数进行经验模态分解 (ensemble empirical mode decomposition, EEMD)得到PDSI具有多周期的非线性特征,其中3~7 a的变化周期为主要周期,这与降水的变化周期一致。中亚五国为变干趋势,而中国西北地区为变湿趋势,并且这种差异在1979年后更加明显,表明“干旱越干旱,湿润越湿润”在亚洲中部干旱区不成立。上述主要结论对全球干旱区干湿变化研究具有指导意义。

关键词： 干湿变化; PDSI; 时空格局; 中亚干旱区(亚洲中部干旱区)

本文引用格式

胡增运 , 胡汝骥 , 周启鸣 , 陈曦 , 殷刚 , 钱静 . 亚洲中部干旱区干湿时空变化特征[J]. 干旱区研究, 2018 , 35(2) : 260 -268 . DOI: 10.13866/j.azr.2018.02.02

Abstract

In the past 100 years,a global warming with regional difference occurred,which induced the dry regions became drier and wet regions became wetter.As one of the major arid regions in the world,the drying and wetting changes over the arid regions in Central Asia played an important role in ecosystems in these regions.The global monthly Palmer Drought Severity Index (PDSI) was applied to explore the spatiotemporal characteristics of the drying and wetting trends over the arid regions in Central Asia during the period of 1950-2014. The results showed that a weak wetting trend was obtained in these regions,and such trend became more significant after the 1980s.A nonlinear trend with a 3-7 year period was found according to the ensemble empirical mode decomposition (EEMD) method,which was consistent with the multi-periodic precipitation variation in Central Asia.A drying trend occurred in the five countries in Central Asia but a wetting trend in northwest China,which was consistent with the variation trend of precipitation over these regions.In addition,the results revealed that it was not true that the “dry regions become drier,and the wet regions become wetter” in Central Asia. These findings provide the important scientific bases for the water sources utilization and the sustainable development of ecosystem.

Key words： drying or wetting trend; PDSI; spatiotemporal pattern; Arid Region of Central Asia

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