气候变化领域集成服务门户(CCPortal): Tree-ring stable isotopes for regional discharge reconstruction in eastern Labrador and teleconnection with the Arctic Oscillation

CCPortal

DOI	10.1007/s00382-019-04731-2
	Tree-ring stable isotopes for regional discharge reconstruction in eastern Labrador and teleconnection with the Arctic Oscillation
	Dinis L.; Bégin C.; Savard M.M.; Marion J.; Brigode P.; Alvarez C.
发表日期	2019
ISSN	0930-7575
起始页码	3625
结束页码	3640
卷号	53 期号:2020-05-06
英文摘要	In northeastern Canada (Labrador), instrumental climatic data cover less than 70 years and long reconstructions from natural archives are non-existent. This study specifically aims at helping filling this gap of knowledge by testing the possibility of reconstructing the regional 1800–2009 discharge of the lower Churchill River from black spruce tree-ring δ13C and δ18O series. The results illustrate direct relationships of summer climatic variables/derived parameter (maximum temperature, total precipitation and vapor pressure deficit) with tree-ring isotope values. Importantly, they show an inverse correlation between combined tree-ring isotope series and regional river discharge due to common climate forcing. To a lesser extent, transpiration also affects the river discharge and tree-ring isotopic compositions. The reconstructed river discharge series agrees with an independent reconstruction based on the ANATEM method (1880–2009 period). The agreement between the two reconstructions validates the two approaches for reconstructing regional hydroclimatic conditions at high latitudes. Moreover, the reconstructions suggest that summer discharge has decreased over the past 200 years in eastern Labrador and more broadly at the Québec-Labrador peninsula scale. This trend correlates with the long-term summer Arctic Oscillation (AO) that influences summer regional climatic conditions. This research contributes with other studies to build up observations linking summer AO and eastern Canada climatic conditions, and calls for research on mechanisms explaining these relationships during summer. © 2019, Crown.
英文关键词	Arctic Oscillation; Carbon isotopes; Labrador; Oxygen isotopes; Past discharge reconstruction; Tree rings
语种	英语
scopus关键词	air-sea interaction; Arctic Oscillation; climate forcing; climate variation; dendroclimatology; oxygen isotope; paleoclimate; reconstruction; regional climate; stable isotope; tree ring; Arctic Ocean; Canada; Labrador; Newfoundland and Labrador; Picea mariana
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146013
作者单位	Geological Survey of Canada, Natural Resources Canada, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada; Université Côte d’Azur, CNRS, OCA, IRD, Géoazur, Nice, France; Centre Eau Terre Environnement, Institut national de la recherche scientifique, 490 rue de la Couronne, Québec, QC G1K 9A9, Canada
推荐引用方式 GB/T 7714	Dinis L.,Bégin C.,Savard M.M.,et al. Tree-ring stable isotopes for regional discharge reconstruction in eastern Labrador and teleconnection with the Arctic Oscillation[J],2019,53(2020-05-06).
APA	Dinis L.,Bégin C.,Savard M.M.,Marion J.,Brigode P.,&Alvarez C..(2019).Tree-ring stable isotopes for regional discharge reconstruction in eastern Labrador and teleconnection with the Arctic Oscillation.Climate Dynamics,53(2020-05-06).
MLA	Dinis L.,et al."Tree-ring stable isotopes for regional discharge reconstruction in eastern Labrador and teleconnection with the Arctic Oscillation".Climate Dynamics 53.2020-05-06(2019).