冰川质量平衡的多代理树环重建:从生长在西尔弗莱塔冰川(瑞士阿尔卑斯山)附近的塞姆布拉松树中获得的启示

IF 3.8 2区 地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY
Jérôme Lopez-Saez, Christophe Corona, Lenka Slamova, Matthias Huss, Valérie Daux, Kurt Nicolussi, Markus Stoffel
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引用次数: 0

摘要

摘要。冰川质量平衡重建为将相对较短的观测记录置于较长期的背景下提供了一种方法。在这里,我们利用来自神达塔曼古尔(God da Tamangur)的塞姆布拉松(Pinus cembra)树的多种代用指标,结合树环解剖学和稳定同位素年代学,重建了附近西尔维雷塔冰川在过去两个世纪中的季节性冰川质量平衡(即冬季、夏季和年度质量平衡)。将树环宽度、早期木质部胞腔径向直径和晚期木质部径向胞壁厚度结合在一起,可以非常显著地重建夏季质量平衡,而对于冬季质量平衡,将径向胞腔与δ18O记录结合在一起时,相关性不那么显著,但仍然很强。将重建的冬季和夏季质量平衡结合起来,可以量化西尔瓦雷塔冰川的年度质量平衡,对该冰川的现场测量可以追溯到 1919 年。我们的重建结果表明,19 世纪上半叶冰川质量大幅增加,小冰河时期结束后这一阶段突然终止。自 19 世纪 60 年代以来,冰川质量负平衡一直占主导地位,随着阿尔卑斯山人为变暖的加剧,质量损失也在加速。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Multiproxy tree ring reconstruction of glacier mass balance: insights from Pinus cembra trees growing near Silvretta Glacier (Swiss Alps)
Abstract. Glacier mass balance reconstructions provide a means of placing relatively short observational records into a longer-term context. Here, we use multiple proxies from Pinus cembra trees from God da Tamangur, combining tree ring anatomy and stable isotope chronologies to reconstruct seasonal glacier mass balance (i.e., winter, summer, and annual mass balance) for the nearby Silvretta Glacier over the last 2 centuries. The combination of tree ring width, radial diameter of earlywood cell lumina, and latewood radial cell wall thickness provides a highly significant reconstruction for summer mass balance, whereas for the winter mass balance, the correlation was less significant but still robust when radial cell lumina were combined with δ18O records. A combination of the reconstructed winter and summer mass balances allows the quantification of the annual mass balance of the Silvretta Glacier for which in situ measurements date back to 1919. Our reconstruction indicates a substantial increase in glacier mass during the first half of the 19th century and an abrupt termination of this phase after the end of the Little Ice Age. Since the 1860s, negative glacier mass balances have been dominant and mass losses accelerate as anthropogenic warming picks up in the Alps.
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来源期刊
Climate of The Past
Climate of The Past 地学-气象与大气科学
CiteScore
7.40
自引率
14.00%
发文量
120
审稿时长
4-8 weeks
期刊介绍: Climate of the Past (CP) is a not-for-profit international scientific journal dedicated to the publication and discussion of research articles, short communications, and review papers on the climate history of the Earth. CP covers all temporal scales of climate change and variability, from geological time through to multidecadal studies of the last century. Studies focusing mainly on present and future climate are not within scope. The main subject areas are the following: reconstructions of past climate based on instrumental and historical data as well as proxy data from marine and terrestrial (including ice) archives; development and validation of new proxies, improvements of the precision and accuracy of proxy data; theoretical and empirical studies of processes in and feedback mechanisms between all climate system components in relation to past climate change on all space scales and timescales; simulation of past climate and model-based interpretation of palaeoclimate data for a better understanding of present and future climate variability and climate change.
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