用树木年轮重建天山北坡中西部7～8月379a的降水量  

A 379-Year July^August Precipitation Series Reconstructed from Tree-Ring on the Midwestern Part of the Northern Slopes of Tianshan Mountains

作　　者：喻树龙[1] 袁玉江[1] 金海龙[2] 崔宇[1] 刘斌 林春亮 

机构地区：[1]中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐830002 [2]新疆师范大学生命与环境学院,新疆乌鲁木齐830054 [3]新疆林业局,新疆乌鲁木齐830000 [4]新疆林业局乌苏林场,新疆乌苏833000

出　　处：《冰川冻土》2005年第3期404-410,共7页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金重大项目(90302012);国家自然科学基金项目(40265002);科技部重大基础研究前期研究专项(2002CCA04600)资助

摘　　要：天山北坡中西部的两个树轮年表与该区域7～8月的降水显著相关.考虑到降水对次年和再次年树木年轮生长的影响,较好地重建了该区域7～8月379a的降水序列,经多方面验证,表明其具有较好的可信性.在379a中,以6.6、6.5、5.4a的周期最为显著,有1734年、1759年、1819年、1872年、1963年5个突变年份,且经历了6个偏湿期及6个偏干期,与伊犁地区重建降水有很好的一致性.Single correlation calculation indicated that the correlations were significant among two tree-ring chronologies and precipitation from July to August on the midwestern part of the northern slopes of Tianshan Mountains, with a maximum correlation coefficient of 0.639 ( %α %=0 ^00002). In consideration of that tree-growth variation lags behind precipitation variation, a 379-year precipitation series was well reconstructed, with an explain variance of 56 ^0%. It was verified that the reconstructed precipitation series was reliable. Analyzing the 379 year reconstructed precipitation series found: 1) There were significant change periods of 6 ^6, 6 ^5, 5 ^4 a; 2) There were 5 abrupt changes in 1734, 1759, 1819, 1872, 1963; 3) There were 6 wet periods and 6 dry periods. The change of the reconstructed precipitation series consists well with that of the precipitation series in Yili Prefecture.

关 键 词：天山北坡中西部 树木年轮 降水重建 

分 类 号：P467[天文地球—大气科学及气象学]