地理学报 ›› 1996, Vol. 51 ›› Issue (s1): 92-101.doi: 10.11821/xb1996S1010

• 论文 • 上一篇    下一篇

采用树轮宽度资料分析气候变化对树木生长量影响的尝试

吴祥定1, 邵雪梅2   

  1. 1. 中国科学院国家计划委员会地理研究所,北京100101;
    2. 中国科学院黄土与第四纪地质国家重点实验室,西安710054
  • 收稿日期:1996-08-01 修回日期:1996-11-01 出版日期:1996-12-15 发布日期:1996-12-15
  • 基金资助:
    国家科委全球气候变化国家研究项目,国家自然科学基金

A PRELIMINARY STUDY ON IMPACT OF CLIMATE CHANGE ON TREE GROWTH USING TREE RING-WIDTH DATA

Xu Xiaogding1, Shao Xuemei2   

  1. 1. Institute of Geography, Chines Academy of Sciences, Beijing 100101;
    2. Xi’an Laboratory of Loess and Quaternary Geology, Chines Academy of Science, Xi’an 710054
  • Received:1996-08-01 Revised:1996-11-01 Online:1996-12-15 Published:1996-12-15

摘要: 依据树木径向生长的基本特征,本文采用吉林长白山和四川贡嗄山二个地点的树木年轮宽度资料,建立了差值年表,揭示了它们对气候因子的响应程度,分析了气候变化对树木生长的影响。结果表明,以树木年轮宽度指数为分析对象,有利于提高分辨率,研究逐年气候变化对树木生长的影响。同时,当全球增暖分别为1℃、2℃和3℃时,我国长白山区的树木径向生长量和材积增加量分别为92%与24.4%、15.7%与44.7%和22.3%与66.3%;在贡嘎山区增加量则分别为5.3%与13.9%、10.1与27.3%和14.7%与41.6%.增加量在东北地区高于西南地区。

关键词: 树轮宽度指数, 气候变化, 树木生长量

Abstract: This article describes the preliminary analysis of the possible impact of air temperature increase on treegrowth using dendroclimatic methods. Residual tree ring-width chronologies of Changbai larch from the north slope of Changbai Mountain, Jinn province and of sargent spruce from the east slope of Gongga Mountain,Sichuan province are involved in this study. The relationships between tree groWth represented by ring-widthindex and climate elements including monthly mean air temperatures and monthly total precipitation were studiedby response function and correlation function of dendroclimatology. The results indicate that both species aresensitive to temperature. Based upon the regression equation developed between ring-width index and selectedmonthly mean temperatures, the percentages of increase in radical growth of tree were estimated with airtemperature going up 1℃, 2℃, 3℃, respectively. This estimation is upon the assumption that air temperaturewill go up due to CO2-induced climatic change. Using experiential equation of the two studied species, theincrease percentages in volume of tree were also estimated from changes in diameter of tree. The results show thatwhen air temperature goes up 1℃, 2℃, and 3℃, respectively, Changbai larch will increase by 9.2%, 15.7% and22.3% in diameter and 24.4%, 44.7% and 66.3% in volume. For sargent spruce, the percentages for diameterincrease arc 5.3%, 10. 1% and 14.9% and 13.g%, 27.3%, 41 .6% for volume increase. Obviously, with the samescenario Changbai larch grows more rabid than sargent spruce in the study area.

Key words: ring-width index, climatic change, grow amount of trees

中图分类号: 

  • P49