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Arid Land Geography >

2019 , Vol. 42 >Issue 6: 1239 - 1252

DOI: https://doi.org/10.12118/j.issn.1000-6060.2019.06.02

Temperature variation characteristics of northwest China based on K-means clustering partition in the past half century

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  • 1 School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021,Ningxia,China; 2 Ningxia Research Center of Technology on Water-saving Irrigation and Water Resources Regulation, Yinchuan 750021, Ningxia,China;3 Engineering Research Center for Efficient Utilization of Water Resources in Modern Agriculture in Arid-Regions, Yinchuan 750021,Ningxia,China

Received date: 2019-04-05

  Revised date: 2019-08-28

  Online published: 2019-11-15

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Abstract

The northwest region in China is vast, with administrative divisions including parts of Shaanxi, Gansu, Ningxia, Qinghai, Xinjiang, and Inner Mongolia. Arid, semi-arid and semi-humid climates coexist in the region. Mountain, Gobi, oasis, desert and other topographical features are intertwined. The northwest region in China is ecologically fragile and sensitive to climate change. It is well known that climate warming and rising temperatures accelerate the water cycle and add up the intensity and frequency of occurrence of extreme weather events such as high temperature and drought and heavy rains. At the same time, it also leads to the uneven distribution of water resources in time and space, and the complexity and difficulty of dealing with floods and droughts. On the contrary, after the temperature stops rising, the water circulation process will slow down; the water cycle elements such as precipitation, evaporation and runoff in the region will inevitably change, which will affect the industrial and agricultural production and the people’ s life in the region. In the new context of climate warming mitigation, this paper analyzes and discusses how the temperature in Northwest China has changed. Is there a warming slowdown? How does temperature respond in different seasons? In this study based on the observations of temperature by 184 meteorological stations in the northwestern region, by using K-means clustering partition, Sen’ s slope estimation and Kendall-Tau nonparametric test methods, the temperature variation characteristics of Northwest China in the past half century (1960—2015) were analyzed. The results show that the temperature in the northwestern region has been increased significantly in the past half century, and the rise rate of annual average minimum temperature is higher than those of the average annual temperature and the highest annual average temperature. From a spatial point of view, the northeastern part of the northern Xinjiang, the northern, western, central and eastern parts of Inner Mongolia, the central and western parts of Gansu Province, the northern and central parts of Qinghai Province, the central and northern parts of Ningxia Province, and the northwestern part of Shaanxi Province are the fastest warming areas. Although the temperature in the northwestern region is generally on the rise, there is a difference in specific areas. Since 1998, the temperature in the northwest region has been slowed down, and some regions have experienced a downward trend. In the past half century, the seasonal temperature and the interannual temperature in the northwestern region are not consistent, and the warming slows down in different seasons in the region. During the period from 1998 to 2015, winter is the season with the smallest increase in temperature. In most sub-regions, the warming trend in winter has been slowed down and even turned into a downward trend. This paper analyzes the trend of temperature change in the northwestern region in the past half century from different spaces and observes the phenomenon of warming mitigation in the northwest region, and this trend is inconsistent in different sub-regions and different seasons. According to the comparison with related researches, the years of warming stagnation found in this paper are consistent with the relevant research conclusions. At the same time, the conclusions of this paper could enrich the understanding of climate temporal and spatial changes in the region and provide assistance for further understanding the temperature variation law in this region.

Key words： cluster analysis; silhouette coefficient; warming mitigation; northwest China

Cite this article

FENG Ke-peng, TIAN Jun-cang, SHEN Hui . Temperature variation characteristics of northwest China based on K-means clustering partition in the past half century[J]. Arid Land Geography, 2019 , 42(6) : 1239 -1252 . DOI: 10.12118/j.issn.1000-6060.2019.06.02

References

［1］赵宗慈,罗勇,王绍武,等.全球变暖中的科学问题［J］.气象与环境学报,2015,(1):1-5.［ZHAO Zongci,LUO Yong,WANG Shaowu,et al.Science issues on global warming［J］.Journal of Meteorology and Environment,2015,(1):1-5.］ ［2］王绍武.气候变暖停滞的再分析［J］.气候变化研究进展,2014,(6):464.［WANG Shaowu.Reanalysis of climate change stagnation［J］.Climate Change Research,2014,(6):464.］ ［3］宋斌,智协飞,胡耀兴.全球变暖停滞的形成机制研究进展［J］.大气科学学报,2015,38(2):145-154.［SONG Bin,ZHI Xiefei,HU Yaoxing.A review of recent studies on global warming hiatus［J］.Transactions of Atmospheric Sciences,2015,38(2):145-154.］ ［4］CARTER B.There is a problem with global warming…It stopped in 1998［N］.The Telegraph,2006-4-9(9). ［5］EASTERLING D R,WEHNER M F.Is the climate warming or cooling?［J］.Geophysical Research Letters,2009,36(8):262-275. ［6］FRANZKE C L E.Warming trends: Nonlinear climate change［J］.Nature Climate Change,2014,4(6):423-424. ［7］FYFE J C,GILLETT N P.Recent observed and simulated warming［J］.Nature Climate Change,2014,4(3):150-151. ［8］LOVEJOY S.Return periods of global climate fluctuations and the pause［J］.Geophysical Research Letters,2014,41(13):4704-4710. ［9］MORELLO L,ABBOTT A,BUTLER D,et al.365 days: 2014 in science［J］.Nature News,2014,516(7531): 300. ［10］葛全胜,王芳,王绍武,等.对全球变暖认识的七个问题的确定与不确定性［J］.中国人口.资源与环境,2014,(1):1-6.［GE Quansheng,WANG Fang,WANG Shaowu,et al.Certainty and uncertainty in global warming studies［J］.China Population,Resources and Environment,2014,(1):1-6.］ ［11］苏京志,温敏,丁一汇,等.全球变暖趋缓研究进展［J］.大气科学,2016,(6):1143-1153.［SU Jingzhi,WEN Min,DING Yihui,et al.Hiatus of global warming: A review［J］.Chinese Journal of Atmospheric Sciences,2016,(6):1143-1153.］ ［12］王绍武,罗勇,赵宗慈,等.对变暖停滞的思考［J］.气候变化研究进展,2014,(4):303-306.［WANG Shaowu,LUO Yong,ZHAO Zongci,et al.Pause for thought［J］.Climate Change Research,2014,(4):303-306.］ ［13］龙爱华,邓铭江,谢蕾，等.气候变化下新疆及咸海流域河川径流演变及适应性对策分析［J］.干旱区地理,2012,35(3):377-387.［LONG Aihua,DENG Mingjiang,XIE Lei,et al.Exploring analysis on the adaptive countermeasures to water resources evolvement under the climate change in Xinjiang and Aral Sea Basin［J］.Arid Land Geography,2012,35(3):377-387.］ ［14］王国亚,沈永平,秦大河.1860—2005年伊塞克湖水位波动与区域气候水文变化的关系［J］.冰川冻土,2006,28(6):854-860.［WANG Guoya,SHEN Yongping,QIN Dahe. Issyk Kul Lake level fluctuation during 1860—2005 and its relation with regional climatic and hydrological changes［J］.Journal of Glaciology and Geocryology,2006,28(6):854-860.］ ［15］ZBIGNIEW W,KUNDZEWICZ.全球变暖导致洪水风险增加——长江洪水前景分析［J］.湖泊科学,2003,15(Z1):155-165.［ZBIGNIEW W.KUNDZEWICZ.Flood risk growth under global change:Yangtze floods in perspective［J］.Journal of Lake Sciences,2003,15(Z1):155-165.］ ［16］施雅风,赵井东.40~30 ka BP中国特殊暖湿气候与环境的发现与研究过程的回顾［J］.冰川冻土,2009,31(1):1-10.［SHI Yafeng,ZHAO Jindong.The special warm-humid climate and environment in china during 40~30 ka BP:Discovery and review［J］.Journal of Glaciology and Geocryology,2009,31(1):1-10.］ ［17］沈永平,王国亚,邵春.塔里木河流域冰川洪水对全球变暖的响应［J］.气候变化研究进展,2007,3(s1):51-56.［SHEN Yongping,WANG Guoya,SHAO Chun.Response of glacier flash flood to global warming in Tarim River Basin［J］.Advances in Climate Change Research,2007,3(s1):51-56.］ ［18］冯克鹏,田军仓.近53 a宁夏地区多尺度干旱特征分析［J］.灌溉排水学报,2016,(2):50-58.［FENG Kepeng,TIAN Juncang.Analysis of multiscale drought characteristics in Ningxia in recent 53 years［J］.Journal of Irrigation and Drainage,2016,(2):50-58.］ ［19］丁一汇.“暖冬”渐行渐远全球变暖暂时停滞了吗［J］.今日科苑,2011,(24):19-22.［DING Yihui.Is global warming stalling as the “warm winter” recedes［J］.Modern Science,2011,(24):19-22.］ ［20］WANG X L,WEN Q H,WU Y.Penalized maximal [WTBX]t[WTBZ] test for detecting undocumented mean change in climate data series［J］.Journal of Applied Meteorology & Climatology,2007,46(6):916-931. ［21］ZHANG X,AGUILAR E,SENSOY S,et al.Trends in Middle East climate extreme indices from 1950 to 2003［J］.Journal of Geophysical Research Atmospheres,2005,110(D22):3159-3172. ［22］[JP2]张高杰,何金海,周自江,等.RHtest方法对我国降水资料的均一性检验试验［J］.气象科技,2012,40(6):914-921.［ZHANG Gaojie,HE Jinmei,ZHOU Zijiang,et al.Homogeneity study of precipitation data over China using RHtest method［J］.Meteorological Science and Technology,2012,40(6):914-921.］ ［23］张高杰，曹丽娟，李亚丽.均一性对西北五省气温变化特征影响分析［J］.农业灾害研究,2013,3(z1):27-32.［ZHANG Gaojie,CAO Lijuan,LI Yali.Analysis of homogeneity impact on the characteristic of the temperature variation in the five provinces of the northwest China［J］.Journal of Agricultural Catastrophology,2013,3(z1):27-32.］ ［24］孙吉贵,刘杰,赵连宇.聚类算法研究［J］.软件学报,2008,(1):48-61.［SUN Jigui,LIU Jie,ZHAO Lianyu.Clustering algorithms research［J］.Journal of Software,2008,(1):48-61.］ ［25］王千,王成,冯振元,等.[WTBX]Kmeans[WTBZ]聚类算法研究综述［J］.电子设计工程,2012,20(7):21-24. ［WANG Qian,WANG Cheng,FENG Zhenyuan,et al.Review of [WTBX]Kmeans[WTBZ] clustering algorithm［J］.Electronic Design Engineering,2012,20(7):21-24.］ ［26］杨善林,李永森,胡笑旋,等.[WTBX]K-means[WTBZ]算法中的[WTBX]K[WTBZ]值优化问题研究［J］.系统工程理论与实践,2006,(2):97-101.［ YANG Shanlin,LI Yongsen,HU Xiaoxuan,et al.Optimization study on K value of K-means algorithm［J］.Systems Engineering Theory & Practice,2006,(2):97-101.］ ［27］谢培,顾艳玲,张玉虎,等.1961—2015年新疆降水及干旱特征分析［J］.干旱区地理,2017,40(2):332-339.［XIE Pei,GU Yanling,ZHANG Yuhu,et al.Precipitation and drought characteristics in Xinjiang during 1961—2015［J］.Arid Land Geography,2017,40(2):332-339.］ ［28］朱连江,马炳先,赵学泉.基于轮廓系数的聚类有效性分析［J］.计算机应用,2010,30(S2):139-141,198.［ZHU Lianjiang,MA Bingxian,ZHAO Xuequan.Clustering validity analysis based on silhouette coefficient［J］.Journal of Computer Applications,2010,30(S2):139-141,198.］ ［29］张应华,宋献方.水文气象序列趋势分析与变异诊断的方法及其对比［J］.干旱区地理,2015,38(4):652-665.［ZHANG Yinghua,SONG Xianfang.Techniques of abrupt change detection and trends analysis in hydroclimatic time-series: Advances and evaluation［J］.Arid Land Geography,2015,38(4):652-665.］ ［30］翟盘茂,潘晓华.中国北方近50年温度和降水极端事件变化［J］.地理学报,2003,(S1):1-10.［ZHAI Panmao,PAN Xiaohua.Change in extreme temperature and precipitation over northern China during the second half of the 20th century［J］.Acta Geographica Sinica,2003,(S1):1-10.］ ［31］李运刚,何大明,胡金明,等.红河流域1960—2007年极端降水事件的时空变化特征［J］.自然资源学报,2012,(11):1908-1917.［LI Yungang,HE Daming,HU Jinming,et al.Spatial and temporal variations of extreme precipitation events in the Red River Basin during 1960—2007［J］.Journal of Natural Resources,2012,(11):1908-1917.］ ［32］梁珑腾,马龙,刘廷玺,等.1951—2014年中国北方地区气温突变与变暖停滞的时空变异性［J］中国环境科学,2018,38(5):1601-1615.［LIANG Longteng,Ma Long,Liu Tingxi,et al.Spatiotemporal variation of the temperature mutation and warming hiatus over northern China during 1951—2014［J］.China Environmental Science,2018,38(5):1601-1615.］ ［33］曲姝霖,仝纪龙,唐睿,等.西北地区极端高温变化及其对气候变暖停滞的响应［J］.气象与环境学报,2017,33(4):78-85.［QU Shulin,TONG Jilong,TANG Rui,et al.Changes in the extremely high temperature in northwest China and its response to the stagnation of global warming［J］.Journal of Meteorology and Environment,2017,33(4):78-85.］ ［34］黄星,马龙,刘廷玺,等.近60年黄河流域典型区域气温突变与变暖停滞研究［J］.中国环境科学,2016,36(11):3253-3262.［HUANG Xing,MA Long,LIU Tingxi,et al.Temperature mutation and globe warming stagnate study in typical area of Yellow River Basin in recently 60 years［J］.China Environmental Science,2016,36(11):3253-3262.］ ［35］丁一汇,柳艳菊,梁苏洁,等.东亚冬季风的年代际变化及其与全球气候变化的可能联系［J］.气象学报,2014,72(5):835-852.［DING Yihui,LIU Yanju,LIANG Sujie,et al.Interdecadal variability of the east Asian winter monsoon and its possible links to global climate change［J］.Acta Meteorologica Sinica,2014,72(5):835-852.］ ［36］唐国利,罗勇,黄建斌,等.气候变暖在继续［J］.气候变化研究进展,2012,8(4):235-242.［TANG Guoli,LUO Yong,HUANG Jianbin,et al.Continuation of the global warming［J］.Climate Change Research,2012,8(4):235-242.］
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