基于红松树轮重建小兴安岭南麓过去140年6月份平均温度变化

基于建立的小兴安岭南麓红松树轮宽度标准年表，分析红松径向生长与该地区温度和降水间的关系以及1982年升温突变对此相关性的影响。结果表明：6月平均温度与树轮宽度年表在变暖前后始终呈极显著负相关，是该地区红松径向生长的主要限制因子。基于此构建的区域1843—1982年6月平均温度重建方程稳定可靠。重建温度序列的偏暖时期和偏冷时期分别持续7年和29年，偏暖时段为1915—1921年，偏冷时段为1880—1891年和1932—1948年。小波分析结果显示6月平均温度存在2—7a周期变化。空间相关分析结果表明重建温度序列能很好的代表小兴安岭南麓及附近区域的温度变化。本研究拓展了研究区现有的气候数据，可为掌握小兴安岭气候变化规律和科学预测未来气候提供数据支撑。

Tree-ring based June mean temperature reconstruction over the past 140 years in the southern Lesser Khingan Mountains, northeastern China

Based on the standard tree-ring width chronology of Pinus koraiensis in the southern Lesser Khingan Mountains, we examined the effects of temperature and precipitation on radial growth and whether these correlations were stable before and after the abrupt warming in 1982. The results showed that the mean temperature in June was extremely significantly negatively correlated with its radial growth throughout the duration of the test. Based on the growth-climate response relationship, the mean temperature in June was reconstructed from 1843 to 1982, which explained 44.3% of the variance in the reconstruction (F=8.730, P<0.005). The warmer and colder periods of the reconstruction sequence lasted 7a (1915-1921) and 29a (1880-1891, 1932-1948), respectively. The reconstructed sequence had an evident 2-7a periodic variation and significantly spatial correlation based on Wavelet analysis and spatial correlation analysis, indicating that it can scientifically represent the temperature change in the southern Lesser Khingan Mountains and their surrounding areas. This study expands the existing regional temperature data, providing a basis for systematical mastery of climate change laws and scientific prediction of the future tendency of climate change in the Lesser Khingan Mountains.