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题名:
Spatiotemporal variability of temperature and precipitation in Gansu Province (Northwest China) during 1951-2015
作者: Wen, Xiaohu1; Wu, Xiaoqing2; Gao, Meng2
刊名: ATMOSPHERIC RESEARCH
ISSN号: 0169-8095
出版日期: 2017-11-15
卷号: 197, 页码:132-149
关键词: Climate extreme ; Trend ; Spatial pattern ; Periodicity ; Atmospheric circulation
DOI: 10.1016/j.atmosres.2017.07.001
产权排序: 第2完成单位
通讯作者: Gao, Meng(Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China)
英文摘要: Climate change is potentially challenging the sustainable development in many parts of the world, especially the semi-arid and arid regions on the earth. Northwest China (NWC) is one of the most arid areas in East Asia, and Gansu Province is located at the important climate transition zone in NWC. Spatiotemporal variability of both temperature and precipitation were analyzed based on the daily observation dataset at 29 meteorological stations over Gansu during 1951-2015. The Mann - Kendall trend test was utilized to detect monotonic trends in extreme climate indices, mean temperature, and total precipitation. The results revealed that the warming trends were statistically significant at most stations in Gansu, especially at the high altitude stations; however, the change trends in annual and seasonal precipitation over Gansu were not significant as expected. Furthermore, the 29 stations were spatially grouped using hierarchical clustering method. The regional-averaged temperature anomalies also showed a significant warming trend beginning at the end of 1970s. Spatial variations were also observed in the annual and seasonal precipitation over Gansu. In general, precipitation increased in the western part of Gansu while decreased in the eastern part. Additionally, the wavelet analyses revealed that the tele-connection between large scale circulation and summer precipitation varied not only from region to region, but also was different at different time scale and different time periods. Analysis of large-scale atmospheric circulation changes showed that a strengthening anticyclonic circulation, increasing geopotential height and rapid warming over the Eurasian continent were considered to be attributable to climate change in Gansu and even in NWC.
研究领域[WOS]: Meteorology & Atmospheric Sciences
项目资助者: Youth Innovation Promotion Association, CAS(2016195) ; CAS(KZCX2-EW-QN209, QYZDJ-SSW-DQC031) ; S & T Service Network Initiative(KFJ-EW-STS-127-2) ; National Natural Science Foundation of China(31570423)
关键词[WOS]: CIRCUMGLOBAL TELECONNECTION ; EXTREME PRECIPITATION ; SUMMER RAINFALL ; TRENDS ; CLIMATE ; MONSOON ; 20TH-CENTURY ; REGION ; INDEXES ; EVENTS
文章类型: Article
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000412250700011
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内容类型: 期刊论文
URI标识: http://ir.yic.ac.cn/handle/133337/23443
Appears in Collections:海岸带信息集成与综合管理实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Gansu, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China

Recommended Citation:
Wen, Xiaohu,Wu, Xiaoqing,Gao, Meng. Spatiotemporal variability of temperature and precipitation in Gansu Province (Northwest China) during 1951-2015[J]. ATMOSPHERIC RESEARCH,2017,197:132-149.
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