Improvement of isotope-based climate reconstructions in Patagonia through a better understanding of climate influences on isotopic fractionation in tree rings

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• 作者：Alié ; nor Lavergne^a ; ^b ; ^c ; ^{lavergne@cerege.fr} ; ^{alienor.lavergne@gmail.com} ; Valé ; rie Daux^a ; Ricardo Villalba^b ; Monique Pierre^a ; Michel Stievenard^a ; Ana Marina Srur^b
• 关键词：tree-rings ; δ13Cδ13C ; δ18Oδ18O ; isotopic fractionation ; Fitzroya cupressoides ; Nothofagus pumilio
• 刊名：Earth and Planetary Science Letters
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：459
• 期：Complete
• 页码：372-380
• 全文大小：1987 K
• 卷排序：459

文摘

Primary climatic controls on specific δ13Cδ13C chronologies are related to temperature. Tree physiological responses are assessed through dual isotope analyses. iWUE variations are mainly driven by photosynthetic assimilation rate in F. cupressoides and by stomatal conductance in N. pumilio. δ13Cδ13C variations represent a useful proxy for reconstructing past changes in summer temperature.