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题名: Spatiotemporal variability of drought in the northern part of northeast China
作者: Zhang, XW; Liu, XH; Wang, WZ; Zhang, TJ; Zeng, XM; Xu, GB; Wu, GJ; Kang, HH
收录类别: SCIE
出版日期: 2018-05-15
刊名: HYDROLOGICAL PROCESSES
卷号: 32, 期号:8, 页码:1449-1460
出版者: WILEY
出版地: HOBOKEN
英文摘要: The thermal and moisture balance of permafrost regions has been altered by global warming, profoundly influencing vegetation dynamics and forest carbon cycling. To understand the spatial and temporal characteristics and driving forces responsible for changes in moisture conditions in the permafrost region of the Greater and Lesser Hinggan Mountains, northeastern China, we assessed long-term trends for temperature, precipitation, and the standardized precipitation-evapotranspiration index. From 1951 to 2014, annual mean temperature had a significant increase trend and the annual precipitation was not with significant trend. Since 1951, the annual standardized precipitation-evapotranspiration index has decreased significantly at the boundary between regions with seasonal soil freezing and permafrost, suggesting that conspicuous permafrost degradation and moisture loss has occurred. The study area can be divided into 4 parts with a different balance between thermal and moisture conditions: the northern Songnen Plains, the Hulun Buir Sand Land, the middle reaches of the Heilongjiang River, and the Mohe region. However, only the middle reaches of the Heilongjiang River showed an obvious long-term drying trend. The 4 areas showed quasi-periodic oscillation and sea surface temperature during the winter half-year affected drought intensity in the northern of Songnen Plains. When El Nino strengthened, moisture conditions increased in the northern of Songnen Plains, whereas stronger La Nina events decreased water availability. The result of this study will be beneficial for regional water resource management and prepare for potential drought hazards in the northeastern China.
关键词: drought ; global warming ; northeastern China ; permafrost region ; spatial variation ; temporal variation
作者部门: [Zhang, Xuanwen ; Liu, Xiaohong ; Zeng, Xiaomin ; Xu, Guobao ; Wu, Guoju ; Kang, Huhu] Chinese Acad Sci, Northwest Inst Eco Environm & Resources, State Key Lab Cryosphere Sci, Lanzhou 730000, Gansu, Peoples R China ; [Liu, Xiaohong ; Zeng, Xiaomin] Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China ; [Wang, Wenzhi] Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China ; [Zhang, Tingjun] Lanzhou Univ, Coll Earth Environm Sci, Lanzhou 730000, Gansu, Peoples R China
通讯作者: Liu, XH (reprint author), Shaanxi Normal Univ, Sch Geog & Tourism, Xian 710119, Shaanxi, Peoples R China.
学科分类: Water Resources
文章类型: Article
所属项目编号: National Natural Science Foundation of China [41421061, 41571196] ; State Key Laboratory of Cryospheric Sciences [SKLCS-ZZ-2017]
所属项目名称: 国家自然科学基金项目
项目资助者: NSFC
语种: 英语
DOI: 10.1002/hyp.11503
ISSN号: 0885-6087
WOS记录号: WOS:000434115000011
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/196033
Appears in Collections:资源环境学院_期刊论文

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Recommended Citation:
Zhang, XW,Liu, XH,Wang, WZ,et al. Spatiotemporal variability of drought in the northern part of northeast China[J]. HYDROLOGICAL PROCESSES,2018,32(8):1449-1460.
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