Dendro-provenancing of Arctic driftwood

QUATERNARY SCIENCE REVIEWS

卷:162

Article

Hellmann, Lena^1,2  Tegel, Willy³  Geyer, Jan³  Kirdyanov, Alexander V.^4,5  Nikolaev, Anatoly N.^6,7  Eggertsson, Olafur⁸  Altman, Jan⁹  Reinig, Frederick²  Morganti, Sandro²  Wacker, Lukas^10,11  Buntgen, Ulf^2,12,13 

[1] CCT CONICET, Inst Argentino Nivol Glaciol & Ciencias Ambiental, Mendoza, Argentina

[2] WSL, Swiss Fed Res Inst, Birmensdorf, Switzerland

[3] Univ Freiburg, Inst Forest Sci, Freiburg, Germany

[4] VN Sukachev Inst Forest SB RAS, Krasnoyarsk, Russia

[5] Siberian Fed Univ, Krasnoyarsk, Russia

[6] North Eastern Fed Univ, Yakutsk, Russia

[7] Melnikov Permafrost Inst, Yakutsk, Russia

[8] Iceland Forest Serv Mogilsa, Reykjavik, Iceland

[9] Czech Acad Sci, Inst Bot, Pruhonice, Czech Republic

[10] ETH, Dept Phys, Ion Beam Phys, Zurich, Switzerland

[11] Univ Cambridge, Dept Geog, Cambridge, England

[12] Global Change Res Inst CAS, CzechGlobe, Brno, Czech Republic

[13] Masaryk Univ, Brno, Czech Republic

关键词: Driftwood;    Arctic ocean;    Boreal forest;    Dendro-provenancing;    Larix sp.;   

DOI  :  10.1016/j.quascirev.2017.02.025

来源: Elsevier

【 摘 要 】

Arctic driftwood may represent a cross-disciplinary proxy archive at the interface of marine and terrestrial environments, which will likely gain in importance under future global climate change. Circumpolar network analyses that systematically consider species-specific boreal origin areas, transport routes and deposition characteristics of Arctic driftwood, are, however, missing. Here, we present tree ring width (TRW) measurements of 2412 pine, larch and spruce driftwood samples from Greenland, Iceland, Svalbard, the Faroe Islands, and the Lena Delta in northeastern Siberia. Representing the largest Arctic driftwood TRW compilation, these data are compared against 495 TRW reference chronologies from the boreal forests of Eurasia and North America. The southern Yenisei region is the main source for recent pine driftwood at all Arctic sampling sites, whereas spruce mainly originates in western Russia and central Siberia, as well as in northern North America. Larch driftwood is, for the first time, dendroprovenanced to central and eastern Siberia. A new larch driftwood chronology extends the middle Lena River reference chronology back to 1203 CE. Annually resolved radiocarbon measurements further date six larch driftwood chronologies between 1294 and 2013 CE. Although being highly replicated, our study emphasizes the importance of interdisciplinary research efforts including radiocarbon dating, isotopic tracing and aDNA processing for improving Arctic driftwood provenancing in space and time. If successful, Arctic driftwood studies will contribute to the reconstruction of past boreal summer temperature variations and ocean current dynamics, as well as changes in sea ice extent and relative sea level over the last centuries to millennia. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free