Climatic implications in earlywood and latewood width indices of Chinese pine in north central China  

作　　者：Kaixuan Yang Junzhou Zhang Haowen Fan Yuan Yan 

机构地区：[1]College of Geographic Sciences,Qinghai Normal University,Xining 810016,People's Republic of China [2]Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation(Ministry of Education),Xining 810016,People's Republic of China [3]Key Laboratory of Western China's Environmental Systems(Ministry of Education),College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730030,People's Republic of China [4]Gansu Liancheng Forest Ecosystem Field Observation and Research Station,Lanzhou University,Lanzhou 730333,People's Republic of China [5]School of Geography and Information Engineering,University of Geoscience,Wuhan 430074,People's Republic of China

出　　处：《Journal of Forestry Research》2024年第3期143-153,共11页林业研究（英文版）

基　　金：supportedbytheNational Natural Science Foundation of China (No.U21A2006 and 42001043).

摘　　要：Latewood width(LWW)indices of trees are considered a reliable proxy of summer precipitation in the Northern Hemisphere.However,the strong coupling and high correlation between earlywood width(EWW)and LWW indices often prevent registration of climate signals of the LWW index.In this study,328-year-long earlywood width and latewood width chronologies were developed from Chinese pine at two sites in the Hasi Mountains,north central China.The climate responses of these chronologies were analyzed and the LWW index used to derive sum-mer precipitation signals.Correlation analyses showed that LWW was particularly influenced by earlywood growth and recorded stronger climate signals of the previous year as EWW,rather than those of the current year with infrequent summer climate signals.However,after removing the effect of earlywood growth using a simple regression model,the adjusted LWW chronology(LWW_(adj))showed a strong relationship with July precipitation in dry years.This suggests that the LWW_(adj) chronology has the potential to be used to investigate long-term variability in summer precipitation in drought-limited regions.

关 键 词：DENDROCLIMATOLOGY Latewood width Climate response Summer precipitation Earlywood effect 

分 类 号：S791.254[农业科学—林木遗传育种]