陕西太白山树轮气候学研究  

Dendroclimatic investigation of Chinese Pine in Taibai Mountain,Shaanxi Province

作　　者：蔡秋芳[1] 刘禹[1,2] 王艳超[1,3] 

机构地区：[1]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,西安710075 [2]西安交通大学人居环境与建筑工程学院环境科学与技术系,西安710049 [3]西安交通大学机械工程学院,西安710049

出　　处：《地球环境学报》2012年第3期874-880,共7页Journal of Earth Environment

基　　金：国家自然科学基金(41171170;40701196;40890051);黄土与第四纪地质国家重点实验室开放基金

摘　　要：长时间序列的树轮气候记录在我国秦岭地区还非常缺乏。本文在陕西太白山地区建立了一条长113年(1898—2010)的油松树轮宽度年表。相关分析表明,树轮宽度除了与生长季前期4月份的平均(最低)气温和月降水量都显著相关,还与1、2月份的平均(最低)气温显著正相关。最终分析表明生长季前期1-3月平均最低气温是太白山地区树木生长的气候限制因子,因此树轮宽度年表可用来反映研究区过去一百多年来冬春季的最低气温变化历史。树轮宽度年表揭示了2次较暖时期(1906—1914,1933—1947)和2次较冷时期(1920—1929,1950—1970),可与周边其他地区冬半年温度重建序列进行对比。不同的是1960年代初期以来,太白山1-3月平均最低气温在波动中缓慢上升,至今似乎仍处于增温状态。Long-term tree-ring climatic records are scarce in the Qinling Mountain range, central China. Here we report al 13-year tree-ring width chronology of Chinese pine （Pinus tabulaeformis Cart. ） from the Taibai Mountain, coving the time span from 1898 to 2010. Correlation analysis revealed that the tree-ring width correlated significantly with both the monthly precipitation and monthly mean （minimum） temperature of April, in addition to this, the ring width also significantly positively correlated with the monthly mean （minimum） temperature of January and February, indicating that the mean minimum temperature from January to March （JM） was the limiting climatic factor controlling tree growth in the Taibai Mountains. The ring-width chronology demonstrated two warmer periods including 1906--1914 and 1933--1947, and two colder periods including 1920--1929 and 1950--1970, which were also recorded by surrounding tree-ring based temperature series. However, the warming trend since the 1960s in the Taibai Moutains is obvious, yet much gentle than other places.

关 键 词：陕西太白山 油松 树轮宽度 1-3月平均最低气温 

分 类 号：P467[天文地球—大气科学及气象学]