新疆天山北坡经济带持续低温指数变化特征  

The Consecutive Cold Day Index Change Characteristics of the Northern Slope Economic Belt of Tianshan Mountains

作　　者：郑玉萍 宫恒瑞[2] 苗运玲[2] 王毅 崔玉玲 蒲洁[2] ZHENG Yuping;GONG Hengrui;MIAO Yunling;WANG Yi;CUI Yuling;PU Jie(Central-Asia Research Center of Atmospheric Science,Urumqi 830002,China;Urumqi Meteorological Bureau,Urumqi 830002,China)

机构地区：[1]中亚大气科学研究中心,新疆乌鲁木齐830002 [2]乌鲁木齐市气象局,新疆乌鲁木齐830002

出　　处：《沙漠与绿洲气象》2022年第5期8-14,共7页Desert and Oasis Meteorology

基　　金：中亚大气科学研究基金项目(CAAS202018)。

摘　　要：利用新疆天山北坡经济带12个国家气象站逐日最低气温和平均气温资料,研究该区域1965—2019年持续低温指数C_(CDI)的变化规律及其对气温变化的响应,结果表明:研究区的年、季平均气温均呈显著升高趋势,其中冬季升温幅度最大,夏季升温幅度最小;受气候变暖的影响,研究区C_(CDI)呈显著减少趋势,其中冬季减少幅度最大、夏季最小;研究区C_(CDI)和平均气温之间呈显著的反相关,年、季都经历了气温距平由负转正、同时对应C_(CDI)距平由正转负的过程;年、季C_(CDI)对平均气温的敏感系数均为负值,说明C_(CDI)值随着气温的升高而减少,敏感系数绝对值春、夏、秋三季均呈显著减小趋势,即C_(CDI)对气候变暖的响应在减弱,而冬季则呈显著增大趋势,即C_(CDI)对气候变暖的响应在增强。The daily minimum temperature and average temperature data from 12 national meteorological stations in the economic belt on the northern slope of Tianshan Mountains in Xinjiang were used to study the variation rules of the consecutive cold day index(C_(CDI))and its response to temperature change during 1965-2019.The results showed that the annual and seasonal mean temperatures in the study area increased significantly,and the largest warming range in winter and the smallest warming range in summer.Under the influence of climate warming,C_(CDI) decreased significantly,with the largest decrease in winter and the smallest in summer.There was a significant inverse correlation between C_(CDI) and mean temperature in the study area.The annual and seasonal temperature anomalies both changed from negative to positive,and the corresponding C_(CDI) anomalies changed from positive to negative.The sensitivity coefficients of annual and seasonal C_(CDI) to mean temperature were negative,indicating that C_(CDI) decreases with the increase of temperature.The absolute value of sensitivity coefficients showed a significant decreasing trend in spring,summer and autumn.In other words,the response of C_(CDI) to climate warming was weakening.And the C_(CDI) increased significantly in winter,indicating that the response of C_(CDI) to climate warming was increasing.

关 键 词：天山北坡经济带 持续低温指数 变化特征 

分 类 号：P468.021[天文地球—大气科学及气象学]