Ranking of tree-ring based hydroclimate reconstructions of the past millennium
Ranking of tree-ring based hydroclimate reconstructions of the past millennium
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DOI：
10.1016/j.quascirev.2019.106074
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发表时间：
2019-04
影响因子：
4
通讯作者：
F. Ljungqvist;Alma Piermattei;A. Seim;P. Krusic;U. Büntgen;M. He;A. Kirdyanov;J. Luterbacher
中科院分区：
文献类型：
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作者：
F. Ljungqvist;Alma Piermattei;A. Seim;P. Krusic;U. Büntgen;M. He;A. Kirdyanov;J. Luterbacher
为了把最近的水文气候变化，包括干旱发生，在一个长期的历史背景下，树木年轮记录作为一个重要的自然档案。在这里，我们评估了46千年长的树木年轮为基础的水文气候重建theirData的同质性，样本复制，增长的连贯性，年表的发展，andClimate Signalbased上发表的标准由Ehrman等人。（2016）评估基于树木年轮的温度重建。汇编46个单独校准的网站重建包括37个不同的树种和干北美（n= 29），亚洲（n= 10），欧洲（n= 5），北方非洲（n= 1）和南美洲南部（n= 1）。对于每个标准，将单个重建分为四组，结果显示，对于所有分析参数，没有重建得分最高或最低。我们发现在总体排名中没有地理差异，但从干旱和半干旱环境中重建往往得分最高。一个强大而稳定的水文气候信号被发现是更重要的比一个长的校准周期。确定的最具挑战性的权衡是高连续的样本重复，以及随着时间的推移，以及良好的内部增长的一致性混合的年龄组分布之间。与温度重建不同，水文气候重建的高比例是使用单独的系列去趋势方法去除百年尺度的变化。通过对所有可用的基于树木年轮的水文气候重建进行定量和客观的评估，我们希望能够促进这些记录的发展，并为这些重建的二级用户提供实用的指导。
To place recent hydroclimate changes, including drought occurrences, in a long-term historical context, tree-ring records serve as an important natural archive. Here, we evaluate 46 millennium-long tree-ring based hydroclimate reconstructions for theirData Homogeneity,Sample Replication,Growth Coherence,Chronology Development, andClimate Signalbased on criteria published by Esper et al. (2016) to assess tree-ring based temperature reconstructions. The compilation of 46 individually calibrated site reconstructions includes 37 different tree species and stem from North America (n= 29), Asia (n= 10); Europe (n= 5), northern Africa (n= 1) and southern South America (n= 1). For each criterion, the individual reconstructions were ranked in four groups, and results showed that no reconstruction scores highest or lowest for all analyzed parameters. We find no geographical differences in the overall ranking, but reconstructions from arid and semi-arid environments tend to score highest. A strong and stable hydroclimate signal is found to be of greater importance than a long calibration period. The most challenging trade-off identified is between high continuous sample replications, as well as a well-mixed age class distribution over time, and a good internal growth coherence. Unlike temperature reconstructions, a high proportion of the hydroclimate reconstructions are produced using individual series detrending methods removing centennial-scale variability. By providing a quantitative and objective evaluation of all available tree-ring based hydroclimate reconstructions we hope to boost future improvements in the development of such records and provide practical guidance to secondary users of these reconstructions.