闽中北柳杉树轮指示的气候信号与季风区不同地域干湿变化关系  

Drought Signals in the Tree-ring Width Record of Cedar( Cryptomeria fortunei)Trees from North Central Fujian: Linkages to the Monsoonal Regions

作　　者：陈峰[1,2] 袁玉江[1] 喻树龙[1] 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所中国气象局树木年轮理化研究重点实验室新疆树轮生态实验室,新疆乌鲁木齐830002 [2]兰州大学西部环境教育部重点实验室资源环境学院,甘肃兰州730000

出　　处：《山地学报》2015年第6期690-695,共6页Mountain Research

基　　金：国家重点基础研究发展规划(2012CB955301);兰州大学西部环境教育部重点实验室开放基金(lzujbky-2011-t02);国家自然科学基金(41405081;U1203281)共同资助~~

摘　　要：利用采自闽中北部柳杉树轮样芯,建立树轮宽度标准化年表,通过树轮气候响应分析,发现柳杉树径向生长主要反映了该地上年7月至当年2月帕尔默干旱指数(PDSI)变化(r=0.6,p<0.001)。进一步研究发现,该年表与山东地区油松树轮年表有着良好相关,他们之间的第一主成分能够准确指示东部沿海季风区干湿变化(r=0.661,p<0.001),并揭示6个偏湿阶段和5个偏干阶段。该第一主成分序列所记录的一些极端干旱事件与中国北方干旱半干旱地区的极端干旱事件有着良好对应,这些极端干旱事件对中国社会有着重要影响。同时也发现该第一主成分序列与东亚夏季风尾闾区的兴隆山降水序列在低频变化上具有很好的一致性,并准确记录了最近30 a东亚夏季风变化趋势。Based on the tree-ring cores of Cryptomeria fortunei collected from north central Fujian,China,the standardized tree-ring width chronology was developed. Growth-climate response analyses showed that the growth of Cryptomeria fortunei is mainly influenced by July- February PDSI variability. There is a reasonable agreement with wet / dry periods previously estimated from tree-ring record in Shandong. Based on the results of principal component analyses,June- February PDSI is the most important forces on the tree growth at the sites（ r = 0. 661,p 0. 001）. Analyzing the first principal component of tree-ring series,we found that： 1） During the last 138 years,6wet periods and 5 dry periods were happen in eastern China; 2） Drought events in the first principal component of tree-ring series are compared to the historical archives and other moisture-sensitive tree-ring width series in northern China. The results reveal common climatic extremes over much of China. Many of these events have had profound impacts on the peoples of China over the past several centuries; 3） The low-frequency change of the first principal component of tree-ring series is correlated positively with the precipitation reconstruction for the Xinglong Mountains of Lanzhou in the monsoonal tail region,and captures the current trend of East Asia summer monsoon.

关 键 词：福建中北部 柳杉 树木年轮 干湿变化 

分 类 号：P461[天文地球—大气科学及气象学] P467