Reevaluation of the reconstruction of summer temperatures from melt features in Belukha ice cores, Siberian Altai
Reevaluation of the reconstruction of summer temperatures from melt features in Belukha ice cores, Siberian Altai
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DOI：
10.1029/2010jd013977
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发表时间：
2011-01
影响因子：
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通讯作者：
S. Okamoto;K. Fujita;H. Narita;J. Uetake;N. Takeuchi;T. Miyake;F. Nakazawa;V. Aizen;S. Nikitin-S.-N
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文献类型：
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作者：
S. Okamoto;K. Fujita;H. Narita;J. Uetake;N. Takeuchi;T. Miyake;F. Nakazawa;V. Aizen;S. Nikitin-S.-N
[1]在以前的一项研究中，过去的夏季温度是从西伯利亚阿尔泰的Belukha冰芯的融化特征重建的。我们评估了净积累和融化特征的气候代表性，通过比较两个Belukha冰芯检索在相邻的网站由不同的机构和日期由不同的方法。两个岩芯的熔融特征表现出显著的相关性，但净积累趋势不同。融化的功能对应于在邻近的山脉冰川终点的撤退率。这些发现表明了冰芯中融化特征的空间代表性。我们重新评估了一个公式，制定重建夏季温度，在以前的研究中使用，并发现它低估了温度。我们提出了一个替代方程，以获得更可靠的夏季温度融化功能和净积累记录期间，1914年至2003年。
[1] In a previous study, past summer temperatures were reconstructed from melt features in the Belukha ice core, Siberian Altai. We evaluated the climatic representativeness of net accumulation and melt features by comparing two Belukha ice cores retrieved at neighboring sites by different institutions and dated by different methods. Melt features in both cores showed a significant correlation, but the trends of net accumulation were different between the cores. Melt features corresponded to the retreat rate of a glacier terminus in a neighboring mountain range. These findings demonstrate the spatial representativeness of melt features in the ice cores. We reevaluated an equation formulated for reconstructions of summer temperature, as used in a previous study, and found that it underestimates temperature. We propose an alternative equation to obtain more reliable summer temperatures from melt features and net accumulation records for the period from 1914 to 2003.