【摘要】 以内蒙古东南部白音罕山落叶松样芯为研究对象,建立研究区124年(1895—2018年)树木年轮晚材蓝光强度差值年表。通过选取年表(1895—1998年)与气象因子的响应分析发现:落叶松晚材蓝光强度年表与6—8月的温度(r=0.42,P<0.01)存在显著的正相关,与6—8月的降水(r=-0.39,P<0.05)和7—10月的SPEI (r=-0.55,P<0.01)存在显著的负相关。经过一阶差分检验,年表与气象要素的相关性仍然稳定,说明研究区树木生长季的温度和水分均是限制树木木质素积累的因素。综合相关分析、滑动相关分析以及空间相关结果表明,落叶松晚材蓝光强度具有进行过去夏季温度变化重建的潜力。更多还原

【Abstract】 A 124 years latewood blue intensity chronology( 1895—2018) was established by using the tree-ring cores of Larix gmelinii in Baiyinhan Mountain,southeast Inner Mongolia. Through analysis of the response patterns between the selected chronology and climatic factors,it was found that the treering latewood blue intensity was significantly positively correlated with temperature from June to August( r = 0. 42,P<0. 01),was significantly negatively correlated with precipitation from June to August( r=-0. 39,P<0. 05) and SPEI from July to October( r =-0. 55,P<0. 01). After the first order difference test,the correlation between chronology and climatic factors is still stable,which indicates that the temperature and moisture of tree growth season in the study area are the factors limiting the accumulation of lignin in trees. Combination of the results of correlation analysis,moving correlation analysis and spatial correlation analysis shows that the latewood blue intensity chronology of Larix gmelinii has the potential as an indicator of past summer temperature change.更多还原