段媛 金凤 许明子

摘要[目的]研究太白山树木年轮宽度对气候变化的响应。[方法]以秦岭地区太白山森林公园及太白山自然保护区高山林线附近的太白红杉为研究对象，建立了该地区1822～2013年树轮标准化年表；应用相关性分析、逐步回归等方法对其树轮生长动态及气候因子变化的响应进行了分析。[结果]太白山地区太白红杉树木年轮包含了丰富且敏感的气候信息，适合进行树木年轮学分析，且其标准化年表与当年3、5和6月平均气温呈显著正相关，与当年4、6月平均降水量呈显著负相关；滞后性研究表明其标准化年表与上年4月平均气温呈显著正相关关系，与上年12月气温呈显著负相关关系；与上年月平均降水量均无显著相关。[结论]建立了太白山树木年轮宽度对气候因子变化的响应函数，为研究及解释秦岭地区气候变化对树木生产的影响提供科学依据。

关键词秦岭太白山地区；树轮宽度；气候变化；响应函数

中图分类号S716.3文献标识码A文章编号0517-6611（2016）04-232-03

Response of Tree Ring Width to the Climate Change in Taibai Mountain of Qinling Mountainous Area

DUAN Yuan，JIN Feng，XU Mingzi（College of Urban and Environmental Science， Northwest University， Xian， Shaanxi 710000）

Abstract[Objective] To research the response of tree ring width to the climate change in Taibai Mountain of Qinling Mountainous Area. [Method] With Larix chinensis near the alpine timberline in Taibai Mountain Forest Park and Taibai Mountain Nature Reserve as the research object， standardization chronology of tree ring was established from 1822 to 2013. Dynamic change of tree ring and climate factor changes were researched by stepwise regression and correlation analysis. [Result] Tree ring of L. chinensis in Taibai Mountain included abundant and sensitive climate information， which was suitable for the treering analysis. The standardization chronology had significantly positive correlation with the average temperatures at March， May and July of the current year， and showed significantly negative correlation with the average precipitation at April and June of the current year. Hysteresis research showed that the standardization chronology had significantly positive correlation with the average temperature at April of the previous year， showed significantly negative correlation with the temperature at December of the previous year， and had no significant correlation with the average monthly precipitation of the previous year. [Result] The response function of tree ring width to climate factor change is established， which provides scientific references for the research on the effects of climate change on tree production in Qinling Mountainous Area.

Key wordsTaibai Mountain of Qinling Mountainous Area； Treering width； Climate change； Response function

樹木年轮具有定年准确、连续性强、分辨率高和易于获得复本等特点，成为获取过去气候信息的重要手段之一。因此，在重建过去千年高分辨率及区域甚至全球尺度气候变化研究中，树木年轮已成为极为重要的代用资料[1]。

秦岭地区属暖温带湿润气候区，是我国地理及气候划分上的重要分界线，也是我国气候变化的敏感区域。秦岭山脉以北气候相对干燥，山脉以南气候温暖湿润。许多学者以树木年轮为代用资料对秦岭地区气候变化进行了研究[2-6]，如刘洪滨等[4]利用秦岭地区树轮年表分别重建了镇安和佛坪地区1～4月份温度变化；……