Timber Logging in Central Siberia is the Main Source for Recent Arctic Driftwood

Hellmann, Lena; Tegel, Willy; Kirdyanov, Alexander V.; Eggertsson, Ólafur; Esper, Jan; Агафонов, Л. И.; Николаев, А. Н.; Knorre, Anastasia A.; Myglan, Vladimir S.; Churakova, Olga V.; Schweingruber, Fritz Hans; Nievergelt, Daniel; Verstege, Anne; Büntgen, Ulf

doi:10.1657/aaar0014-063

Cited by 27 publications

(18 citation statements)

References 131 publications

(137 reference statements)

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“…Ten site chronologies had a significant temperature signal against all seasons for which we calculated correlations, that is JJ, JJA, June, and July monthly means. Correlations with precipitation would likely have been higher for some sites when calculating against earlier summer totals at the onset of the growing period (Helama and Lindholm 2003, Helama et al 2005, Hellmann et al 2015. Calculations using mean March-May precipitation totals, however, did not reveal better results.…”

Section: Discussionmentioning

confidence: 98%

Diverse growth trends and climate responses across Eurasia’s boreal forest

Hellmann

Агафонов

Ljungqvist

et al. 2016

Environ. Res. Lett.

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Section: Discussionmentioning

confidence: 98%

Diverse growth trends and climate responses across Eurasia’s boreal forest

Hellmann

Агафонов

Ljungqvist

et al. 2016

Environ. Res. Lett.

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“…highlight the potential biases in this most recent section of the driftwood record possibly resulting from (a) greater preservation of wood, though this is countered by great abundance of much older wood in other sampled regions and (b) influence from the development of Siberian logging activities ∼70 cal year B.P. Pinus Sylvestris from the Yenisei is the dominant logged species in Siberia in this time [ Hellmann et al ., ] and the CAA driftwood record includes only two incidences of Pinus ≤1 ka B.P. This may be an underestimate due to 22 samples from this period being of unknown species, and so without further insight into the provenance of these samples it cannot be definitively said if this increase is due to human influence and preservation factors or indicative of greater supply and incursion from favorable climatic conditions and AO mode.…”

Section: Discussionmentioning

confidence: 99%

Out of the woods: Driftwood insights into Holocene pan‐Arctic sea ice dynamics

Hole

Macias‐Fauria

2017

JGR Oceans

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The collation of 913 driftwood samples from across the western Arctic, with spatiotemporal distribution and available provenance data, enabled the production of a high‐resolution proxy‐based reconstruction of Holocene Arctic Ocean surface current and sea ice dynamics. Regionally bounded, driftwood‐based sea ice reconstructions studies suggest spatiotemporally complex past Arctic sea ice extent and movement; however, a large‐scale compilation of Holocene Arctic driftwood has not previously been developed. Sparse driftwood in the early Holocene (≥8.2 cal ka B.P.) deglacial period was followed by increased driftwood deposition in the warmer mid‐Holocene (8.2–4.2 cal ka B.P.); characterized by an enhanced Transpolar Drift (TPD) ∼7 cal ka B.P., leading to sea ice loss through the Fram Strait. Driftwood incursion peaks show spatial E‐W progression from the Eurasian Archipelagos to Greenland and the Canadian Arctic Archipelago, suggesting a progressive shift in the orientation of the TPD on centennial‐millennial time scales and intermediate phases in the Arctic Oscillation. Late Holocene cooling (≤4.2 cal ka B.P.) is indicated by increased influx of probably North American Picea via a strengthened Beaufort Gyre (BG) which enhanced sea ice recirculation, starting in the western Arctic and progressing eastward. In recent millennia (<2 cal ka B.P.), a more variable driftwood record alternates between BG and TPD dominance on centennial time scales. To further constrain a spatiotemporal reconstruction of variations in Holocene ocean current and sea ice dynamics, a more definitive determination of driftwood provenance is recommended to build upon the current framework, such as through radiogenic isotope tracing and aDNA analysis.

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“…Driftwood was collected in Svalbard in 1996, in eastern Greenland in 2010, 2011 and 2012 and in Iceland in 2012 (Figure 1) [18,31]. Samples were taken as discs from driftwood stems and all wood was classified as logged or natural material (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

“…and Picea sp. were measured, combined to floating chronologies and, if possible, cross-dated against reference chronologies from the boreal forest zone (for further details see [31,32]). Successful cross-dating not only reveals the age but also the boreal origin of the wood samples, and is hence referred to as "dendro-provenancing", i.e., the comparison of sample and reference ring-width series based on statistical criteria and visual control [33,34].…”

Section: Methodsmentioning

confidence: 99%

“…Sampling sites in the northern Arctic are characterized by a high probability of finding millennial-old wood samples due to minor human impact [25]. Recent Arctic driftwood, mainly collected at sea-level and more southern sites, additionally reflects forest management and logging activities in its source regions, the boreal forest zone [18,31]. A systematic, circumpolar assessment, that not only investigates age and composition of Arctic driftwood, but also the link to forest management activities in the origin areas, is, however, still missing.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Boreal Timber Rafting on the Composition of Arctic Driftwood

Hellmann

Kirdyanov

Büntgen

2016

Forests

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Abstract:Wood from the boreal forest represents an important resource for paper production and sawmill processing. Due to poor infrastructure and high transportation costs on land, timbers are often transported over long distances along large river systems. Industrial river rafting activities started at the end of the 19th century and were intensified in western Russia and central Siberia from the 1920s to the 1980s. After initial single stem rafting, timber is today mostly floated in ship-guided rafts. Lost wood can be transported further to the Arctic Ocean, where it may drift within sea ice over several years and thousands of kilometers before being deposited along (sub-)Arctic coastlines. Here, we introduce dendro-dated tree-ring width series of 383 driftwood samples from logged timber that were collected along different driftwood-recipient coastlines in Greenland, Iceland and Svalbard. The majority of driftwood is Pinus sylvestris from the southern Yenisei region in central Siberia, whereas Larix sp. and Picea sp. from western Russia and eastern Siberia are rare. Although our results are based on a small sample collection, they clearly show the importance of timber rafting on species, age and origin of Arctic driftwood and indicate the immense loss of material during wood industrial river floating.

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Timber Logging in Central Siberia is the Main Source for Recent Arctic Driftwood

Cited by 27 publications

References 131 publications

Diverse growth trends and climate responses across Eurasia’s boreal forest

Diverse growth trends and climate responses across Eurasia’s boreal forest

Out of the woods: Driftwood insights into Holocene pan‐Arctic sea ice dynamics

Effects of Boreal Timber Rafting on the Composition of Arctic Driftwood

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