Regional difference of the start time of the recent warming in Eastern China: prompted by a 165-year temperature record deduced from tree rings in the Dabie Mountains
Regional difference of the start time of the recent warming in Eastern China: prompted by a 165-year temperature record deduced from tree rings in the Dabie Mountains
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中国东部近期变暖开始时间的区域差异：由大别山树木年轮推算的165年气温记录引发
DOI：
10.1007/s00382-017-3741-7
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发表时间：
2018-03-01
期刊：
影响因子：
4.6
通讯作者：
Sun, Changfeng
中科院分区：
文献类型：
--
作者：
Cai, Qiufang;Liu, Yu;Sun, Changfeng
从热带到亚热带地区的年轮研究比温带地区的年轮研究少，这极大地限制了我们对一些关键气候变化问题的理解。利用大别山样品的树轮宽度年代学，重建了该地区4 - 6月的平均气温，解释方差为46.8%。在重建中确定了五个寒冷时期（1861-1869、1889-1899、1913-1920、1936-1942和1952-1990）和三个温暖时期（1870-1888、1922-1934和2000-2005）。重建结果不仅与研究区内及周边地区的仪器记录吻合较好，而且与附近地区的温度重建结果具有较好的相似性，表明其对中国东部中部地区温度变化具有一定的时空代表性。大别山地区虽然没有长期增温趋势，但1970年以来的增温趋势是明确的（0.064°C/年）。进一步的温度比较表明，中国东部近期增温开始时间存在区域差异。它从北向南逐渐延迟，北部至少在1940年左右开始，中部在1970年左右开始，南部在1980年左右开始。这项工作丰富了中国东部地区的高分辨率温度重建。我们预计未来气候变暖将促进中国亚热带高寒台湾松林的径向生长，从而促进台湾松林的碳捕获和碳储存。这也有助于厘清中国东部近期变暖的区域特征。
Tree-ring studies from tropical to subtropical regions are rarer than that from extratropical regions, which greatly limit our understanding of some critical climate change issues. Based on the tree-ring-width chronology of samples collected from the Dabie Mountains, we reconstructed the April–June mean temperature for this region with an explained variance of 46.8%. Five cold (1861–1869, 1889–1899, 1913–1920, 1936–1942 and 1952–1990) and three warm (1870–1888, 1922–1934 and 2000–2005) periods were identified in the reconstruction. The reconstruction not only agreed well with the instrumental records in and around the study area, but also showed good resemblance to previous temperature reconstructions from nearby regions, indicating its spatial and temporal representativeness of the temperature variation in the central part of eastern China. Although no secular warming trend was found, the warming trend since 1970 was unambiguous in the Dabie Mountains (0.064 °C/year). Further temperature comparison indicated that the start time of the recent warming in eastern China was regional different. It delayed gradually from north to south, starting at least around 1940 AD in the north part, around 1970 AD in the central part and around 1980s in the south part. This work enriches the high-resolution temperature reconstructions in eastern China. We expect that climate warming in the future would promote the radial growth of alpinePinus taiwanensisin the subtropical areas of China, therefore promote the carbon capture and carbon storage in thePinus taiwanensisforest. It also helps to clarify the regional characteristic of recent warming in eastern China.