生态与农村环境学报2024，Vol.40Issue(7)：919-926,8.DOI:10.19741/j.issn.1673-4831.2023.0536
关帝山青扦径向生长对厄尔尼诺-南方涛动(ENSO)事件的响应
Response to ENSO Events in the Radial Growth of Picea wilsonii in Guandi Mountains,China
摘要
Abstract
Guandi Mountains are situated in the climate transition zone(CTZ)of North China,which is strongly influ-enced by ENSO events.Analyzing the relationship between radial growth of Picea wilsonii in this mountain and ENSO e-vents can enhance our understanding of the impact of climate change on tree growth in montane forests within the CTZ.Re-sidual tree-ring width chronologies(RES)were established for P.wilsonii at an altitude of 2 000-2 200 m using collected tree-ring samples from Guandi Mountains.Pearson correlation analysis was employed to examine the correlation between tree-ring width index(RWI)and monthly mean temperature(MMT),monthly precipitation(MTP),as well as the multi-variate ENSO index(MEI).Cross-wavelet transform analysis(XWT)was utilized to determine the temporal frequency of ENSO events within the residual chronology of P.wilsonii.Paired t-tests were conducted to compare the difference in spruce response to ENSO events between wide and narrow tree-rings.Superimposed epoch analysis(SEA)was applied to identify changes in radial growth pattern of P.wilsonii following typical ENSO events.The main findings are as follows:(1)Radial growth of spruce trees was primarily influenced by MMT during the previous pre-growing season(p3-p5),as well as the current growing season(c7,c9).Additionally,it showed a positive response to MTP at both the start(pp5)and the end(pp9)stages of the two previous years'growing seasons.(2)The RES chronology of P.wilsonii exhibited a significantly negative correlation with the MEI from previous May to current March(p5-c3)(P＜0.05),indicating a co-periodic oscillation lasting 2-5.5-years.(3)The wide-rings predominantly occurred during La Nina events while the nar-row-rings with El Nino events,moreover,significant slowdowns in radial growth were observed during both El Nino event years(P＜0.01)and three subsequent years after such an event occurred(P＜0.01)for P.wilsonii in Guandi Mountains.关键词
多元ENSO指数(MEI)/宽轮与窄轮/交叉小波变换分析/气候过渡区/青扦Key words
multivariate ENSO index(MEI)/wide and narrow tree-rings/cross-wavelet transform analysis(XWT)/cli-mate transition zone(CTZ)/Picea wilsonii分类
资源环境引用本文复制引用
黄晓霞,王李乐,莫旭昱,江源..关帝山青扦径向生长对厄尔尼诺-南方涛动(ENSO)事件的响应[J].生态与农村环境学报,2024,40(7):919-926,8.基金项目
国家自然科学基金(42171049) （42171049）
云南省科技厅科技计划项目(202203AC100006) （202203AC100006）
