甘肃省1967-2008年气温和降水时空变化  

Spatiotemporal Variability of Temperature and Precipitation during 1967-2008 in Gansu Province

作　　者：王红桃 包光[1,2] 胡亚飞 WANG Hongtao;BAO Guang;HU Yafei(Shaanxi Key Laboratory of Disaster Monitoring and Mechanism Simulation,School of Geography and Environment,Baoji University of Arts and Sciences,Baoji 721013,China;State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi’an 710061,China)

机构地区：[1]陕西省灾害监测与机理模拟重点实验室,宝鸡文理学院地理与环境学院,陕西宝鸡721013 [2]中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,陕西西安710061

出　　处：《沙漠与绿洲气象》2017年第2期34-42,共9页Desert and Oasis Meteorology

基　　金：陕西省青年科技新星计划项目(2016KJXX-41);陕西省自然科学基础研究计划项目(2014JQ5192);国家自然科学基金项目(41301101);黄土与第四纪地质国家重点实验室开放基金项目(SKLLQG1505,SKLLQG1302)共同资助

摘　　要：利用甘肃省27个气象站1967—2008年的气温和降水资料,采用趋势系数法、反距离权重插值法和小波分析法分析了甘肃省近42 a的气温和降水时空变化,并根据季风区非季风区将甘肃省划分为西北部和东南部两个研究区。研究结果表明:1967—2008年甘肃省气温呈上升趋势,降水呈减少趋势。甘肃省西北部气温较东南部上升显著,尤其是河西走廊中部增温速率最快,并且甘肃省、西北部和东南部气温序列都存在12~15 a、6 a左右的周期,气温的变化与厄尔尼诺和拉尼娜事件密切相关。甘肃省降水量西北部有略微增加的趋势,东南部减少显著,不同的海拔高度降水量差异较大,甘肃省和东南部在时间尺度上都存在14 a、7~8 a和4 a左右的周期,西北部存在12 a、7 a和4 a的周期。甘肃省西北部气候略变暖湿,东南部气候暖干化趋势显著。Based on the data of temperature and precipitation from27meteorological stations in Gansu province,spatiotemporal features of regional climate change during1967-2008were analyzed by the methods of trend coefficient,inverse distance weighted interpolation and wavelet analysis.Study results indicated that temperature exhibited a rising trend and precipitation exhibited an opposite trend over the whole Gansu province during the past42years.Temperature in northwestern Gansu increased faster than that in southeastern region.Particularly,high linear slopes of rising trend in temperature appeared in the central part of Hexi Corridor.The primary oscillation periods of approximately12-15years and6years occurred in the temperature series of the whole Gansu province as well as in northwestern and southeastern regions.The temperature variations over this region displayed closely connections with the events of ENSO and La Nina.Precipitation in northwestern Gansu increased slightly,on the contrary,precipitation in southeastern region decreased obviously.The wavelet analyses exhibited primary oscillation periods of14years,7-8years and4years contained in the precipitation series of the whole Gansu province and southeastern region.Approximately12years,7years and4years periods were found in northwestern precipitation sequence.In general,warm and wet climate conditions appeared in northwestern Gansu and opposite variation trends(warm and dry)appeared in southeastern Gansu during the several decades.

关 键 词：气温 降水 亚洲季风区 西风带气候区 甘肃省 

分 类 号：P423[天文地球—大气科学及气象学] P426.6