Temperature variations recorded in Pinus tabulaeformis tree rings from the southern and northern slopes of the central Qinling Mountains, central China
Temperature variations recorded in Pinus tabulaeformis tree rings from the southern and northern slopes of the central Qinling Mountains, central China
复制标题
秦岭中部南坡和北坡油松年轮记录的温度变化
DOI：
10.1111/j.1502-3885.2008.00065.x
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发表时间：
2009-01-01
期刊：
影响因子：
2.2
通讯作者：
An, Zhisheng
中科院分区：
文献类型：
--
作者：
Liu, Yu;Linderholm, Hans W.;An, Zhisheng
秦岭山脉是中国大陆中东部气候和植被分布的重要分界线。本文利用秦岭南坡（MW站）和北方（NWT站）的88棵油松（Pinus tabulaeformis）柱样重建了温度的季节变化。在校正期内，南坡年轮宽度与前9月至当年4月的平均气温呈显著正相关，相关系数为0.76;北方坡年轮宽度与前9月至当年4月的平均气温呈显著正相关，相关系数为0.67。随后的温度重建跨度为1760-2005年的北方网站和1837-2006年的南部网站。在世纪中期之前，一般来说，9月至4月的气温较低，随后是5月至7月的高温，这可能反映了冬季和夏季季风的变化。然而，自世纪中期以来，两个记录都显示南坡9月至4月温度有更明显的上升趋势。这些结果为解释最近的变暖在自然界中是不寻常的提供了独立的支持，与观测记录相吻合。结果与周围地区基于树木年轮的重建结果进行了比较，表明秦岭重建中存在区域信号。
The Qinling Mountain range constitutes a critical boundary for climate and vegetation distribution in eastern central mainland China owing to its importance as a geographic demarcation line. In this article, cores from 88 Chinese pines (Pinus tabulaeformis) from the southern (MW site) and northern (NWT site) slopes of the Qinling Mountains were used to reconstruct seasonal temperature variations. During the calibration period, significant correlations were found between ring width and the mean temperature from prior September to current April of 0.76 at the southern slope, and between ring width and the mean May–July temperature of 0.67 at the northern slope. The subsequent temperature reconstructions span 1760–2005 for the northern site and 1837–2006 for the southern site. Prior to the mid‐20th century, low September–April temperatures were, in general, followed by high May–July temperatures, probably reflecting variations in the winter and summer monsoon. However, since the mid‐20th century, both records show trends of a more pronounced increase in September–April temperature on the southern slope. The results provide independent support for the interpretation that recent warming is unusual in nature, coinciding with the observed record. The results compare well with tree‐ring based reconstructions from the surrounding regions, suggesting regional signals in the Qinling Mountain reconstructions.