Evaluation of Tree Growth Relevant Atmospheric Circulation Patterns for Geopotential Height Field Reconstructions for Asia
Evaluation of Tree Growth Relevant Atmospheric Circulation Patterns for Geopotential Height Field Reconstructions for Asia
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DOI：
10.1175/jcli-d-17-0164.1
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发表时间：
2018-05
影响因子：
4.9
通讯作者：
A. Seim;Johannes A. Schultz;C. Beck;A. Bräuning;P. Krusic;C. Leland;O. Byambasuren;E. Liang;Xiaochun Wang;Jee-Hoon Jeong;H. Linderholm
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文献类型：
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作者：
A. Seim;Johannes A. Schultz;C. Beck;A. Bräuning;P. Krusic;C. Leland;O. Byambasuren;E. Liang;Xiaochun Wang;Jee-Hoon Jeong;H. Linderholm
大气环流影响当地和区域的天气状况，从而影响树木的生长。为了识别与树木生长相关的夏季天气类型及其相关的天气尺度环流模式，创建了一个大气环流树轮指数（ACTI）数据集，该数据集来自1871-2010年期间亚洲414个树木年轮站点。在ACTI数据集的常见变异模式进行了比较，夏季观测到的500百帕位势高度的领先模式。前四个ACTI模式（解释总方差的88%）与欧亚大陆，热带和太平洋的压力中心。从树木年轮和500百帕高度场得到的主导环流模式之间的时空相似性很高，表明从亚洲树木年轮重建大尺度环流模式具有很强的潜力。这将有助于在人为气候变化之前对自然大气环流变异进行调查，并提供一种手段来验证气候预测的模型模拟。
Atmospheric circulations influence local and regional weather conditions and, thus, tree growth. To identify summer weather types relevant for tree growth, and their associated synoptic-scale circulation patterns, an atmospheric circulation tree ring index (ACTI) dataset, derived from 414 tree-ring sites across Asia spanning the period 1871–2010, was created. Modes of common variability in the ACTI dataset were compared with leading modes of observed summertime 500-hPa geopotential height. The first four ACTI modes (explaining 88% of the total variance) were associated with pressure centers over Eurasia, the tropics, and the Pacific Ocean. The high spatiotemporal resemblance between the leading circulation modes, derived from both tree rings and 500-hPa geopotential height fields, indicates a strong potential for reconstructing large-scale circulation patterns from tree rings in Asia. This would allow investigations of natural atmospheric circulation variability prior to anthropogenic climate change and provide a means to validate model simulations of climate predictions.