地理科学进展 ›› 2021, Vol. 40 ›› Issue (2): 343-356.doi: 10.18306/dlkxjz.2021.02.014

• 研究综述 • 上一篇    

树轮密度对气候的响应及重建研究进展

邓国富1,2, 李明启1,2,*()   

  1. 1. 中国科学院地理科学与资源研究所,中国科学院陆地表层格局与模拟重点实验室,北京 100101
    2. 中国科学院大学,北京 100049
  • 收稿日期:2020-04-20 修回日期:2020-08-21 出版日期:2021-02-28 发布日期:2021-04-28
  • 通讯作者: 李明启
  • 作者简介:邓国富(1996— ),女,湖南株洲人,硕士生,主要研究方向为气候与环境变化。E-mail: dengguofu18@mails.ucas.edu.cn
  • 基金资助:
    国家自然科学基金项目(41977391);国家自然科学基金项目(41630529);国家自然科学基金项目(41571194)

Advances of study on the relationship between tree-ring density and climate and climate reconstruction

DENG Guofu1,2, LI Mingqi1,2,*()   

  1. 1. Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-04-20 Revised:2020-08-21 Online:2021-02-28 Published:2021-04-28
  • Contact: LI Mingqi
  • Supported by:
    National Natural Science Foundation of China, No(41977391);National Natural Science Foundation of China, No(41630529);National Natural Science Foundation of China, No(41571194)

摘要:

树轮密度是重建过去气候变化的重要代用指标。过去几十年,国内外学者针对树轮密度开展了大量的研究工作,取得了丰硕的成果。论文收集了国内外有关树轮密度的研究文献,从树轮密度对气候变化的响应和气候重建等方面进行了概述。尽管树轮密度对气候变化的响应可能受到样点的地理位置、地形(如海拔、坡向等)、树种等因素的影响,但湿冷地区树轮晚材最大密度能较好地反映生长季或生长季末期温度变化;而干旱地区的早材平均密度能揭示生长季早期的降水变化。因此,目前大多数研究以重建生长季或生长季末期温度为主,也有重建降水量、海平面气压变化的案例。此外,重建方程的方差解释量存在空间和树种间的差异,但这些差异需要更多的研究工作加以验证。最长的重建序列来自于欧洲,长达2018 a;国内基于树轮密度重建的最长温度序列来自于西南地区,长达449 a。另外,树轮密度序列在对温度响应的分异性问题以及评估强火山喷发的降温效应方面还存在争议。其争议源于树轮密度与温度关系还受到其他环境变量与人为因素的影响,因此今后研究还需关注树轮密度与降水、光照等其他气候变量的关系,同时也要注重树种、海拔、实验方法等非气候因子的影响。

关键词: 树轮密度, 气候变化, 温度重建, 火山喷发

Abstract:

Tree-ring density is one of the important proxies for climate reconstruction. In the past few decades, international and Chinese scholars have carried out a large number of studies on the relationship between tree-ring density and climate, and many climate series were reconstructed for different regions. In this study, we collected publications about the responses to climate change and climate reconstruction based on tree ring density, and reviewed some progresses in these areas. Although the relationship between tree-ring density and the climate may be affected by tree species, terrain (altitude, slope direction, and so on), and other factors, the maximum latewood density is a well-known proxy of summer or early fall temperature variation in cold and moist areas, while earlywood density can be used to reconstruct precipitation variation in arid areas. Therefore, most of the scholars reconstructed the temperature of the summer or the late fall, and only few precipitation and sea level pressure series were reconstructed based on tree-ring density. In addition, the variance that the reconstruction can explain varies from region to region, and from tree species to species. To date, the reconstruction series spanned 2018 years in Europe, which is the longest in the world, and 449 years in Southwest China, which is the longest series in China. There still exist controversies around the divergence in tree-ring density response to temperature and the cooling effect of volcanic eruptions, because of the unstable relationship between tree-ring density and temperature. Future research should pay more attention to the relationship between tree-ring density and other climate variables such as precipitation and light, and the influence of nonclimatic factors such as altitude, tree species, and experimental methods.

Key words: tree-ring density, climate change, temperature reconstruction, volcanic eruption