秦巴山区植被快速变化区典型气候指标的演变特征及其海拔依赖性分析  

Analysis on the Variation Characteristics of Typical Climatic Indexes and its Altitude Dependence in the Region of Rapid Vegetation Changes of Qinba Mountain

作　　者：张月悦 程志刚 陈笑笑 宾昕 靳立亚 ZHANG Yueyue;CHENG Zhigang;CHEN Xiaoxiao;BIN Xin;JIN Liya(CGollege of Atmospheric Soiences Plateau Atmosphere and Eavironment Key Laboratory of Sichuan Province,Chengdu University of In-forrmation and Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学大气科学学院/高原大气与环境四川省重点实验室,四川成都610225

出　　处：《成都信息工程大学学报》2020年第4期471-478,共8页Journal of Chengdu University of Information Technology

基　　金：国家科技基础资源调查专项资助项目(2017FY100903);国家自然科学基金资助项目(41971026)。

摘　　要：气候因子对植被生长具有决定性作用,为更好地研究秦巴山区气候因子的变化特征,依据该区域NDVI时空分布特征,选取500~1200 m海拔段35个气象站点1975-2017年的逐日气温、降水数据,分析了植被快速增长区典型气候指标的变化特征及其海拔依赖性。结果表明:35站的温暖指数、寒冷指数,最暖月均温,最冷月均温、10℃积温和积温日数均呈增大趋势,其变化率均与海拔呈正相关,而干湿度指数则呈减小趋势,且指数变化率与海拔呈负相关关系;最高温极大值超过42℃,年代际平均温度保持在12℃~16℃,2005年后最大增温趋势超过1.4℃/10 a;温度极值的变化率与海拔高度呈正相关,最高温的极小值变化率与海拔的正相关性最强,最低温极小值最弱,但均通过95%显著性检验。;The climatic factors are decisive factors of vegetation growth,in order to learn the variation characteristics of climatic factors in the Qinba Mountain,based on the temporal and spatial distribution characteristics,the paper chooses daily air temperature and precipitation data of 35 meteorological stations between 500 m to 1200 m above the sea level from 1975 to 2017 in Qinba Mountain.The typical climatic indexes and elevation dependence of the fast-growing region of vegetation are analyzed.The results showed that;Kira's warmth index,Kira's coldness index,the mean temperature in the warmest month,the mean temperature in the coldest month,the accumulated temperature above 10℃and dura-tion days increased obviously,and there was positive relationship between their rates of change and their altitudes.But the aridity/humidity index has an decreasing trend,and the change rate of exponent has an negative relationship with the altitude.(2)The maximum value of maximum air temperature exceeded 42℃.The perennial mean air temperature re-mained from 12℃to 16℃,and the maximum warming rate is over 1.4℃/10a.(3)The change rate of temperature extreme value is positively corelated with altitude.There was a strong positive correlation between the minimum value of maximum air temperature and the altitude,a weak positive correlation between the minimum value of minimum air tem perature and the altitude,but all the correlations were significant(P<0.05).

关 键 词：大气科学 气候与环境变化 秦巴山区 生物气候指标 温度极值 海拔依赖性 

分 类 号：P461.8[天文地球—大气科学及气象学]