摘要
树轮气候学研究发现,随着全球气候变暖的加剧,20世纪后半期以来,树木生长对气候变化的响应关系发生了改变,出现了树轮-气候响应关系不稳定、树木生长趋势分异等现象(divergence phe-nomenon).分异现象的发现,对传统树轮重建方法和结果提出了挑战,同时对研究全球碳循环、碳储量估测也有重要影响.分析和总结前人的工作发现,目前关于分异现象的研究主要集中在北半球高纬度地区,中低纬度地区的研究相对较少,尤其是亚洲高海拔地区.对分异现象产生原因的解释还存在较大争议,针对分异现象的解决方案目前主要集中在去趋势方法、气象数据选择、校准期选择以及样本的选择等方面.
With the intensification of global warming in the latter half of the 20th century,tree growth-climate response relationship changing has been found in dendroclimatology research,such as the tree ring-climate relationship is instability and the tree growth trend diverges.Divergence phenomenon poses a challenge to the traditional methods and results of tree-ring reconstruction,and also has important implications on the global carbon cycle and carbon uptake estimation.By analyzing and summarizing the previous works,it is found that the current research on the divergence phenomenon is focused in the Northern Hemisphere high-latitude regions and the low-latitude regions is relatively scarce,especially in Asia high altitude regions.The explanation on the divergence phenomenon is still debated.At present,the solution of the divergence phenomenon mainly focus on the detrending methods,the selection of meteorological data and calibration period,the samples select and so on.
出处
《冰川冻土》
CSCD
北大核心
2011年第2期453-460,共8页
Journal of Glaciology and Geocryology
基金
国家自然科学基金项目(40971119)
国家自然科学基金创新群体项目(40721061)
国家重点基础研究发展计划(973计划)项目(2009CB421306)
中国科学院"百人计划"项目(29O827B11)
高等学校学科创新引智计划项目(B06026)资助
关键词
树轮气候
分异现象
分异问题
生长分异
重建
dendroclimatology
divergence phenomenon
divergence problem
growth divergence
reconstruction
