基于黄山松树轮重建华东天目山地区1809—2018年4—7月平均气温

doi:10.13287/j.1001-9332.202209.005

摘要/Abstract

摘要： 利用浙江北部西天目山高海拔黄山松树轮样品,建立了340年的整轮、早材和晚材宽度年表,根据子样本信号强度大于0.8的标准,确定年表的可靠时段为1810—2019年,通过对年表与气候要素进行相关分析,研究了树轮生长对气候的响应。结果表明: 黄山松径向生长对气温的响应远高于对降水的响应。综合考虑原始序列和一阶差序列相关分析结果,发现早材宽度与上年生长季前期平均气温、平均最高气温显著相关,晚材宽度与上年5月和当年9月平均气温、平均最高气温显著相关。整轮响应时段与早材较为一致,但相关性较低。最优相关组合为早材宽度与上年4—7月平均气温。基于这一关系,重建了华东天目山地区1809—2018年4—7月平均气温,方差解释量达61.5%,原始序列和一阶差序列均通过分段检验。重建气温序列中的偏冷时段为1834—1964年,偏暖时段为1809—1833和1965—2018年。20世纪60年代以来,气温进入快速上升阶段,从低频趋势上看,20世纪80年代之后气温达到过去210年来的最高水平。空间相关分析表明,重建序列较好地代表了华东地区气温的变化情况,与华东地区的区域重建序列对比也具有较好的一致性。黄山松在华东地区古气候重建方面具有较大潜力。

关键词: 黄山松, 早材宽度, 晚材宽度, 气温

Abstract: We established 340-year chronologies of total ring width, early wood width, and late wood width with tree-ring samples of Pinus taiwanensis at high altitude collected from the western Tianmu Mountain in northern Zhejiang Province. According to the criterion that subsample signal strength (SSS) should be larger than 0.8, the reliable period was from 1810 to 2019. Through the correlation analysis between chronologies and climatic factors, we examined the responses of tree ring growth to climate. The results showed that radial growth of P. taiwanensis was more sensitive to temperature than to precipitation. Comprehensively considering the correlation analysis results for the raw and first-order difference series, early wood width was significantly correlated with the early growing season mean and maximum temperatures of the prior year, while late wood width with prior May and current September mean and maximum temperatures. The correlation pattern of total ring width was similar to that of early wood width, although at a low level. The optimal correlation was between early wood width and prior April-July mean temperature. Based on this relationship, April-July mean temperature of the Tianmu Mountain, East China was reconstructed for the period of 1809-2018 with an explained variance of 61.5%. Both the raw and first-order difference series passed the split sample calibration-verification test. The warm periods were 1809-1833 and 1965-2018, with a cold period in 1834-1964. Temperature had risen rapidly since the 1960s. From the standpoint of low frequency, it reached an unprecedented level since the 1980s over the past 210 years. Spatial correlation analysis showed that the reconstructed temperature series could represent temperature variations of East China, which had a good agreement with a reconstructed regional temperature series from East China. Our results showed that P. taiwanensis had a great potential for paleoclimate reconstruction in East China.

Key words: Pinus taiwanensis, early wood width, late wood width, air temperature

徐嘉睿, 王慧, 赵明水, 史逝远, 张亚萍, 史江峰. 基于黄山松树轮重建华东天目山地区1809—2018年4—7月平均气温[J]. 应用生态学报, 2022, 33(9): 2347-2355.

XU Jia-rui, WANG Hui, ZHAO Ming-shui, SHI Shi-yuan, ZHANG Ya-ping, SHI Jiang-feng. Reconstructing mean temperature of April-July in 1809-2018 based on tree-ring of Pinus taiwanensis in the Tianmu Mountain, East China[J]. Chinese Journal of Applied Ecology, 2022, 33(9): 2347-2355.

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