天山东部不同海拔西伯利亚落叶松对气候变暖的响应分析

doi:10.7525/j.issn.1673-5102.2018.01.003

植物研究 ›› 2018, Vol. 38 ›› Issue (1): 14-25.doi: 10.7525/j.issn.1673-5102.2018.01.003

天山东部不同海拔西伯利亚落叶松对气候变暖的响应分析

张晴^1,2, 于瑞德¹, 郑宏伟¹, 杨美琳¹, 甘淼¹

1. 中国科学院新疆生态与地理研究所干旱区环境演变实验室, 乌鲁木齐 830011;
2. 中国科学院大学, 北京 100049

收稿日期:2017-06-14 出版日期:2018-01-15 发布日期:2018-01-06
通讯作者: 于瑞德,E-mail:yuruide@sina.com E-mail:yuruide@sina.com
作者简介:张晴(1992—),女,硕士研究生,主要从事气候变化和环境演变研究.
基金资助:
中国科学院千人计划科研项目（Y672141）；中国科学院“西部青年学者”项目（2015-XBQN-B-22）

Response Analysis of Larix sibirica to Climate Warming at Different Elevations in the Eastern Tianshan Mountains

ZHANG Qing^1,2, YU Rui-De¹, ZHENG Hong-Wei¹, YANG Mei-Lin¹, GAN Miao¹

1. Laboratory of Environmental Change in Arid Lands Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences, Urumqi 830011;
2. University of Chinese Academy of Sciences, Beijing 100049

Received:2017-06-14 Online:2018-01-15 Published:2018-01-06
Supported by:
“One thousand plan” from Chinese academy of sciences(Y672141);“Young scholars of western” from Chinese academy of sciences(2015-XBQN-B-22)

摘要/Abstract

摘要： 利用树木年轮气候学方法，探讨了在气候变暖情景下，天山东部上中下限西伯利亚落叶松（Larix sibirica）树木径向生长与气候因子之间的响应关系，并利用冗余分析对其关系进行了验证。结果表明：不同海拔的差值年表（RES）要比标准年表（STD）的特征参数大，具有更高的信噪比和平均敏感度，含有较多的环境信息且更能代表树木总体变化；海拔2160m处的年表（L1）在快速升温（1985年）后，树木年轮宽度与降水和温度的相关性明显减弱；海拔2430m处的年表（L2）在两个时段内与降水和温度的关系均较弱；海拔2700m处的年表（L3）在1985~2013年时段内对降水和气温的正响应均增强。树木径向生长对单月气候因子的响应在前一年11、12月份显著性更高，当年6、7月份气温与树轮宽度指数具有更高的相关性。气候变暖使树木径向生长不断减小的特征在低海拔地区表现更为明显。上中下限西伯利亚落叶松对气温升高的敏感性降低。高海拔地区西伯利亚落叶松的径向生长主要受温度的影响，而中低海拔地区主要受降水与温度的共同影响。

关键词: 树木年轮, 天山东部, 西伯利亚落叶松, 气候变暖, 响应分析

Abstract: Under the background of climate warming, we discussed the response relationship between the radial growth of Larix sibirica and the climatic factors at different elevation of the eastern Tianshan Mountains, and validated this relationship by using the redundant analysis method. Compared with the standard chronology, the residual chronology of different elevation has larger characteristic parameters, higher SNR and mean sensitivity, and more environmental information, which is better to represent the overall change of trees. At 2 160 m(L1), after the rapid warming of the chronology(after 1985), the correlation between the tree-ring width and the temperature was reducing significantly. At 2 430 m(L2), the chronology is less associated with precipitation and temperature in two periods. At 2 700 m(L3), the positive response of the chronology to precipitation and temperature from 1985-2013 was enhanced. The response of radial growth to monthly climatic factors is higher in November and December of the last year, and the correlation between temperature and tree-ring width index is higher in June and July of the current year. Climate warming reduces the radial growth of trees, which is more obvious in low elevation areas. At all elevation, the sensitivity of L.sibirica to climate warming is decreasing. The radial growth of the L.sibirica at high elevation is mainly affected by the temperature, while that at middle and low elevation area is mainly affected by precipitation and temperature.

Key words: tree rings, eastern Tianshan Mountains, Larix sibirica, climate warming, response analysis

中图分类号:

Q948.112

张晴, 于瑞德, 郑宏伟, 杨美琳, 甘淼. 天山东部不同海拔西伯利亚落叶松对气候变暖的响应分析[J]. 植物研究, 2018, 38(1): 14-25.

ZHANG Qing, YU Rui-De, ZHENG Hong-Wei, YANG Mei-Lin, GAN Miao. Response Analysis of Larix sibirica to Climate Warming at Different Elevations in the Eastern Tianshan Mountains[J]. Bulletin of Botanical Research, 2018, 38(1): 14-25.

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天山东部不同海拔西伯利亚落叶松对气候变暖的响应分析

Response Analysis of Larix sibirica to Climate Warming at Different Elevations in the Eastern Tianshan Mountains

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