利用树轮宽度重建近280a来祁连山东部地区的春季降水  

Spring Precipitation Reconstructed in the East of the Qilian Mountain During the Last 280 a by Tree Ring Width

作　　者：勾晓华[1] 陈发虎[1] 王亚军[1] 邵雪梅[2] 

机构地区：[1]兰州大学西部环境教育部重点实验室和资源环境学院,甘肃兰州730000 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《冰川冻土》2001年第3期292-296,共5页Journal of Glaciology and Geocryology

基　　金：国家重点基础研究发展规划项目 (G2 0 0 0 0 4870 1) ;国家自然科学基金项目 ( 497310 10 ;498710 72 )资助

摘　　要：利用采自祁连山东部的祁连圆柏样芯样本 ,建立标准化年表 ,并将标准年表的树轮指数与附近的乌鞘岭气象站的温度和降水进行相关分析 .结果表明 ,年轮指数与 3～ 4月降水呈显著正相关 ,相关系数为 0 .5 2 5 .利用标准化年表与 3～ 4月降水的线性回归方程重建了研究区近 2 80a来的 3～ 4月降水 ,统计检验表明重建结果是可靠的 .Dendrochronology is studying how to reconstruct the past global change. In virtue of the tree ring easy to be dated, the width of the tree ring able to be measured precisely and closely relating to climate change, the trees dispersing widely and easy to be sample, using tree ring data to reconstruct climate change is developing very quickly in the word. With the consummation of the dendrochronology theory and the development of the analysis method, there are thousands of tree ring chronologies were build in the world, many of which were used to reconstruct the past climate change. Until now the tree ring width and density data not only were used to reconstruct the long period but also the large space scale climate change. The tree ring width standard chronology for the Sabina przewalskii of the east of the Qilian Mountains was build. The relationship between the tree ring index of the standard chronology and the meteorology data of the nearest meteorology station was worked out. It is found that the tree ring index closely relates to the March-April precipitation, with a correlative coefficient of 0.525. The linear regression function was used to reconstruct the March-April precipitation of the researched area. Statistics indicates that the reconstruction is dependable. Although the close relationship between the March-April precipitation and the annual precipitation was not understand very well, it is believed that the March-April precipitation is able to represent annual humidity. Thus, the reconstruction is meaningful.

关 键 词：祁连山 树木年轮 降水重建 春季 标准化年表 温度 线性回归方程 

分 类 号：P467[天文地球—大气科学及气象学]