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A 457-year reconstruction of precipitation in the southeastern Qinghai-Tibet Plateau, China using tree-ring records

ISSN号：1672-0504
期刊名称：《地理与地理信息科学》
时间：0
分类：P942.7[天文地球—自然地理学] P467[天文地球—大气科学及气象学]
作者机构：[1]Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Research School of Arid Environment and Climate Change, Lanzhou Universiry, Lanzhou 730000, China, [2]State Key Laboratory of Cryospheric Sciences Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
相关基金：The authors would like to thank Dr. Zexin Fan for data support and thank Prof. Ruhai Wang of Lamar University （USA）for improving the English. The authors are grateful for the advice and suggestions given by the peer reviewers and editors of the Chinese Science Bulletin. This work was sup- ported by the National Natural Science Foundation of China （41171039 and 40890051）, the Chinese NSFC Innovation Team Project （41021091）, the One Hundred Talents Program of Chinese Academy of Sciences （290827Bll） and the Program of Introducing Talents of Discipline to Universities from China＇s Ministry of Education （B06026）.

作者： GOU XiaoHua[1], YANG Tao[1], GAO LinLin[1], DENG Yang[1], YANG MeiXue[2], CHEN FaHu[1]

关键词：青藏高原东南部, 降水重建, 树木年轮, 中国, 降水量变化, 树轮宽度, 干旱指数, 相关性分析, Abies Mill., Hengduan Mountains, precipitation reconstruction, Qinghai-Tibet Plateau, tree-ring width

中文摘要：

这份报纸用树戒指记录在东南的 Qinghai 西藏高原论述降水的 457 年的重建。树戒指样品在 Qinghai 西藏高原的东南的部分从 Hengduan 山被收集，中国。一张将近 500 年的年表用树戒指宽度记录被开发。关联分析表演潮湿是在这个区域限制树生长的主要因素。戒指宽度断然显著地在许多月内与帕尔默干旱严厉索引(PDSI ) 和降水被相关。最高的关联系数从以前的 9 月在树和猛冲的年度生长之间被发现到当前的 6 月(0.738 ) 。基于这种关系，我们重建了从 1509 ～ 2006 的降水历史。重建解释 54.4%(R 形容词 2 =53.5% ， N=49， F=56.12 ) 实际降水变化在刻度时期(19582006 ) 期间。在重建(15492006 ) 的可靠时期期间，一些低频率的气候信号被包括，显示这个区域最后 20 年一直在变得更湿在里面。重建记录六显然弄干，五个雨的时期和第 17 世纪弄干比任何其它长持续的时期。当与其它相比最近的研究，这研究和这些更早的重建在干旱的变化显示出一个类似的趋势时并且雨。进一步空间的关联分析证实重建的降水足够地代表全部 Hengduan 山区的降雨历史。多逐渐变细方法，一种类型光谱分析，在有的这个区域揭示那猛冲重要(P < 0.01 ) 光谱在 35 点的山峰一， 60 一 and 7985 一。

英文摘要：

This paper presents a 457-year reconstruction of precipitation in the southeastern Qinghai-Tibet Plateau using tree-ring records. Tree-ring samples were collected from the Hengduan Mountains in the southeastern part of the Qinghai-Tibet Plateau, China. A nearly 500-year chronology was developed using tree-ring width records. Correlation analysis shows moisture is the main factor limiting tree growth in this region. Ring-widths were significantly positively correlated with the Palmer Drought Severity Index （PDSI） and precipitation in many months. The highest correlation coefficient was found between the annual growth of trees and precipitation from the previous September to the current June （0.738）. Based on this relationship, we reconstructed the precipita- tion history from 1509 to 2006. The reconstruction explains 54.4% （R2aaj=53.5%, N=49, F=56.12） of the actual precipitation varia- tion during the calibration period （1958-2006）. During the reliable period of the reconstruction （1549-2006）, some low-frequency climate signals are included, indicating this region has been getting wetter in the last 20 years. The reconstruction documents six apparently dry and five pluvial periods and the 17th century dry period lasted longer than any other. When compared with other recent studies, this study and these earlier reconstructions show a similar trend in the variation of drought and pluvial. Further spatial correlation analysis confirms that the reconstructed precipitation adequately represents the rainfall history of the entire Hengduan Mountain area. The Multi-taper method, a type of spectral analysis, reveals that precipitation in this area had significant （P〈0.01） spectral peaks at 3-5 a, 60 a and 79-85 a.

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