Reconstruction of northeast Asia spring temperature 1784–1990
Reconstruction of northeast Asia spring temperature 1784–1990
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DOI：
10.5194/cp-9-261-2013
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发表时间：
2013-01
影响因子：
4.3
通讯作者：
M. Ohyama;H. Yonenobu;Jongnam Choi;W. Park;M. Hanzawa;Mitsuo Suzuki
中科院分区：
文献类型：
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作者：
M. Ohyama;H. Yonenobu;Jongnam Choi;W. Park;M. Hanzawa;Mitsuo Suzuki
抽象的。我们描述了广域树木气候重建的首次尝试，该尝试基于日本和韩国活树年轮宽度的七个春季温度敏感年表。重建了公元 1784 年至 1990 年期间 35-40° N 和 125-140° E 之间的网格陆地气温数据集 (CRUTEM4) 的 3 月至 5 月平均温度。在这七种年表中，有两种日本年表在校准试验中被淘汰。重建解释了校准期间温度变化的19.4%，并且被认为对于估计年际到年代际变化是有技巧的，而不是对于长期变化。这次重建显示出与日本和韩国的区域树状气候重建非常相似的波动，表明该地区春季气温过去的空间一致性。重建结果已针对其他气候指标进行了验证。根据中国东南部和日本的文献记录估计，与寒冷期有相当好的一致性。从仪器记录中恢复的日本西部温度序列也与重建结果相当吻合。另一方面，拉基火山和坦博拉火山喷发后的重建并没有显示出明显的突然凹陷。这些比较表明，该地区的树木气候空间重建为重建东北亚长期和大规模的过去温度模式提供了良好的潜力。
Abstract. We describe a first attempt of wide-area dendroclimatic reconstruction, based upon seven spring temperature-sensitive chronologies from the ring widths of living trees, in Japan and Korea. Mean March–May temperature derived from a gridded land air temperature dataset (CRUTEM4) between 35–40° N and 125–140° E was reconstructed for the period of AD 1784–1990. Of the seven, two Japanese chronologies were eliminated during the calibration trials. The reconstruction accounted for 19.4% of the temperature variance in the calibration period, and is considered to be skillful for estimating interannual-to-interdecadal variations and not for long-term change. This reconstruction showed remarkably similar fluctuations to regional dendroclimatic reconstructions in Japan and Korea, indicating the past spatial coherency of spring temperatures in the region. The reconstruction was validated against other climate proxies. A fairly good agreement was found with cold periods as estimated from documentary records in southeast China and Japan. The west Japan temperature series recovered from instrumental records also showed a reasonable agreement with the reconstruction. On the other hand, the reconstruction did not show clear abrupt depressions after the Laki and the Tambora eruptions. These comparisons revealed that dendroclimatic spatial reconstruction in this area offers a good potential for reconstructing long-term and large-scale past temperature patterns for northeast Asia.