Tectonics of the Laptev Shelf, Siberian Arctic

Gymnocolea borealis is reported for the first time for Asia from Russia based on the morphological and subsequent molecular-genetic comparison of rbcL cpDNA sequence of the specimen from the Gydansky Peninsula, West Siberian Arctic. An extended morphological description, generalizing the species characters throughout its range, and data on its variation, differentiation and ecology, and photomicrographs are provided. The occurrence of G. borealis growing as separate shoots among dense mire vegetation makes it easy to overlook. Presently known isolated records of G. borealis support its disjunctive circumpolar distribution.

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Human and Dog Consumption of Fish on the Lower Ob River of Siberia: Evidence for a Major Freshwater Reservoir Effect at the Ust’-Polui Site

Radiocarbon ◽

10.1017/rdc.2017.77 ◽

2017 ◽

Vol 60 (1) ◽

pp. 239-260 ◽

Cited By ~ 11

Author(s):

Robert J Losey ◽

Lacey S Fleming ◽

Tatiana Nomokonova ◽

Andrei V Gusev ◽

Natalia V Fedorova ◽

...

Keyword(s):

Stable Isotope ◽

Age Differences ◽

Dietary Patterns ◽

Fish Bone ◽

Archaeological Sites ◽

Faunal Remains ◽

Siberian Arctic ◽

Freshwater Reservoir ◽

Age Range ◽

Stable Isotope Data

AbstractUst’-Polui is one of the most extensively studied archaeological sites in the western Siberian Arctic. New radiocarbon (14C) dates for charcoal, faunal remains, bark, hide, and human bone from this site are presented. When modeled, the charcoal dates span from ~260 BC to 140 AD, overlapping with the dendrochronology dates from the site. These dates also overlap with the expected age of the site based on artefact typology. 14C dates on reindeer bone have a slightly younger modeled age range, from ~110 BC to 350 AD. In contrast, dates on the site’s numerous dog remains, and on human and fish bone, all predate these modeled age ranges by over 500 years, despite being from the same deposits. Several sets of paired dates demonstrate significant age differences. Bone dates with lower δ13C values tend to be over 500 years older than those with higher δ13C values. Stable isotope data for the humans, dogs, and other faunal remains are also presented. These data suggest the dogs and the humans were regularly consuming freshwater fish. The dogs were probably fed fish by their human counterparts. Overall, the dog and human dietary patterns at Ust’-Polui created 14C dates biased with major freshwater reservoir effects.

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The impact of a thermodynamic sea-ice module in the COSMO numerical weather prediction model on simulations for the Laptev Sea, Siberian Arctic

Polar Research ◽

10.3402/polar.v30i0.6334 ◽

2011 ◽

Vol 30 (1) ◽

pp. 6334 ◽

Cited By ~ 18

Author(s):

David Schröder ◽

Günther Heinemann ◽

Sascha Willmes

Keyword(s):

Sea Ice ◽

Prediction Model ◽

Numerical Weather Prediction ◽

Weather Prediction ◽

Numerical Weather Prediction Model ◽

Laptev Sea ◽

Numerical Weather ◽

Siberian Arctic ◽

The Impact ◽

The Laptev Sea

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Comment on “The origin of methane in the East Siberian Arctic Shelf unraveled with triple isotope analysis” by Sapart et al. (2017)

Biogeosciences ◽

10.5194/bg-15-4777-2018 ◽

2018 ◽

Vol 15 (15) ◽

pp. 4777-4779

Author(s):

Katy J. Sparrow ◽

John D. Kessler

Keyword(s):

Natural Environment ◽

Isotope Analysis ◽

Critical Evaluation ◽

Arctic Shelf ◽

Anthropogenic Contamination ◽

Sample Collection ◽

Quality Of Data ◽

Siberian Arctic ◽

Systematic Methodology

Abstract. In this comment, we outline two major concerns regarding some of the key data presented in this paper. Both of these concerns are associated with the natural abundance radiocarbon-methane (14C-CH4) data. First, no systematic methodology is presented, nor previous peer-reviewed publication referenced, for how these samples were collected, prepared, and ultimately analyzed for 14C-CH4. Not only are these procedural details missing, but the critical evaluation of them using gaseous and aqueous blanks and standards was omitted although these details are essential for any reader to evaluate the quality of data and subsequent interpretations. Second, due to the lack of methodological details, the source of the sporadic anthropogenic contamination cannot be determined and thus it is premature for the authors to suggest it was in the natural environment prior to sample collection. As the natural 14C-CH4 data are necessary for the authors' stated scientific objectives of understanding the origin of methane in the East Siberian Arctic Shelf, our comment serves to highlight that the study's objectives have not been met.

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Supplementary material to "Organic matter across subsea permafrost thaw horizons on the East Siberian Arctic Shelf"

10.5194/tc-2018-229-supplement ◽

2018 ◽

Author(s):

Birgit Wild ◽

Natalia Shakhova ◽

Oleg Dudarev ◽

Alexey Ruban ◽

Denis Kosmach ◽

...

Keyword(s):

Organic Matter ◽

Arctic Shelf ◽

Permafrost Thaw ◽

Siberian Arctic ◽

Supplementary Material ◽

Subsea Permafrost

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Ground-ice stable isotopes and cryostratigraphy reflect late Quaternary palaeoclimate in the Northeast Siberian Arctic (Oyogos Yar coast, Dmitry Laptev Strait)

10.5194/cp-2017-1 ◽

2017 ◽

Cited By ~ 1

Author(s):

Thomas Opel ◽

Sebastian Wetterich ◽

Hanno Meyer ◽

Alexander Yu. Dereviagin ◽

Margret C. Fuchs ◽

...

Keyword(s):

Stable Isotopes ◽

Stable Isotope ◽

Late Quaternary ◽

Cold Winter ◽

Winter Climate ◽

Climate Conditions ◽

Winter Conditions ◽

Winter Temperatures ◽

Siberian Arctic ◽

Ice Wedge

Abstract. To reconstruct palaeoclimate and palaeonvironmental conditions in the Northeast Siberian Arctic, we studied late Quaternary permafrost deposits at the Oyogos Yar coast (Dmitry Laptev Strait). New infrared stimulated luminescence ages for distinctive floodplain deposits of the Kuchchugui Suite (112.5 ± 9.6 kyr) and thermokarst lake deposits of the Krest Yuryakh Suite (102.4 ± 9.7 kyr), respectively, provide new substantial geochronological data and shed light on the landscape history of the Dmitry Laptev Strait region during the Marine Isotope Stage (MIS) 5. Ground ice stable-isotope data are presented together with cryolithological information for eight cryostratigraphic units and are complemented by data from nearby Bol'shoy Lyakhovsky Island. Our combined record of ice-wedge stable isotopes as proxy for past winter climate conditions covers the last about 200 thousand years and is supplemented by texture-ice stable isotopes which contain annual climate conditions overprinted by freezing processes. Our ice wedge stable-water isotope data indicate substantial variations in Northeast Siberian Arctic winter climate conditions during the late Quaternary, in particular between Glacial and Interglacial but also over the last millennia to decades. Stable isotope values of Ice Complex ice wedges indicate cold to very cold winter temperatures about 200 kyr ago (MIS7), very cold winter conditions about 100 kyr ago (MIS5), very cold to moderate winter conditions between about 60 and 30 kyr ago, and extremely cold winter temperatures during the Last Glacial Maximum (MIS2). Much warmer winter conditions are reflected by extensive thermokarst development during the MIS5c and by Holocene ice-wedge stable-isotopes. Modern ice-wedge stable isotopes are most enriched and testify the recent winter warming in the Arctic. Hence, ice-wedge based reconstructions of changes in winter climate conditions add substantial information to those derived from paleoecological proxies stored in permafrost and allow for distinguishing between seasonal trends of past climate dynamics. Future progress in ice-wedge dating and an improved temporal resolution of ice-wedge derived climate information may help to fully explore the palaeoclimatic potential of ice wedges.

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