DOI: 10.1002/2017JG003989
Scopus记录号: 2-s2.0-85040190778
论文题名: Past Summer Temperatures Inferred From Dendrochronological Records of Fitzroya cupressoides on the Eastern Slope of the Northern Patagonian Andes
作者: Lavergne A. ; Daux V. ; Pierre M. ; Stievenard M. ; Srur A.M. ; Villalba R.
刊名: Journal of Geophysical Research: Biogeosciences
ISSN: 21698953
出版年: 2018
卷: 123, 期: 1 起始页码: 32
结束页码: 45
语种: 英语
英文关键词: basal area increment
; carbon isotopes
; Fitzroya cupressoides
; southern South America
; summer temperature reconstruction
Scopus关键词: basal area
; carbon isotope
; climate forcing
; climate variation
; coniferous tree
; dendrochronology
; El Nino-Southern Oscillation
; growth
; paleoclimate
; paleotemperature
; reconstruction
; Southern Hemisphere
; summer
; temperature gradient
; tree ring
; Andes
; Patagonia
; South America
; Fitzroya cupressoides
英文摘要: Estimating summer temperature fluctuations over long timescales in southern South America is essential for better understanding the past climate variations in the Southern Hemisphere. Here we developed robust 212 year long basal area increment (BAI) and δ13C chronologies from living temperature-sensitive Fitzroya cupressoides on the eastern slope of the northern Patagonian Andes (41°S). After removing the increasing trend from the growth records likely due to the CO2 fertilization effect, we tested the potential to reconstruct past summer temperature variations using BAI and δ13C as predictors. The reconstruction based on δ13C records has the strongest predictive skills and explains as much as 62% of the total variance in instrumental summer temperature (n = 81, p < 0.001). The temperature signal recorded in tree-ring growth is not substantially different to that present in δ13C and consequently does not provide additional information to improve the regression models. Our δ13C-based reconstruction shows cold summer temperatures in the second part of the 19th century and in the mid-20th century followed by a warmer period. Notably, the 20th and the early 21st centuries were warmer (+0.6°C) than the 19th century. Reconstructed summer temperature variations are modulated by low-latitude (El Niño–Southern Oscillation) and high-latitude (Southern Annular Mode) climate forcings. Our reconstruction based on δ13C agrees well with previous ring width based temperature reconstructions in the region and comparatively enhances the low-frequency variations in the records. The present study provides the first reconstruction of summer temperature in South America south of 40°S for the period 1800–2011 entirely based on isotopic records. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114738
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ, Gif-sur-Yvette, France; Department of Life Science, Imperial College London, Ascot, United Kingdom; Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales, IANIGLA-CONICET, Mendoza, Argentina
Recommended Citation:
Lavergne A.,Daux V.,Pierre M.,et al. Past Summer Temperatures Inferred From Dendrochronological Records of Fitzroya cupressoides on the Eastern Slope of the Northern Patagonian Andes[J]. Journal of Geophysical Research: Biogeosciences,2018-01-01,123(1)