Sea-level evolution of the Laptev Sea and the East Siberian Sea since the last glacial maximum

Klemann, Volker; Heim, Birgit; Bauch, Henning A.; Wetterich, Sebastian; Opel, Thomas

doi:10.1007/s41063-015-0004-x

Cited by 32 publications

(26 citation statements)

References 32 publications

(40 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Most of the area is shallower than 120 m, implying that it was exposed during the sea level low stand of the Last Glacial Maximum (LGM) and the larger glaciations following the mid-Pleistocene transition (Lambeck et al, 2014;Rohling et al, 2014), even considering glacial isostatic adjustments (Klemann et al, 2015) ( Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

et al. 2017

View full text Add to dashboard Cite

Abstract. Ice sheets extending over parts of the East Siberian continental shelf have been proposed for the last glacial period and during the larger Pleistocene glaciations. The sparse data available over this sector of the Arctic Ocean have left the timing, extent and even existence of these ice sheets largely unresolved. Here we present new geophysical mapping and sediment coring data from the East Siberian shelf and slope collected during the 2014 SWERUS-C3 expedition (SWERUS-C3: Swedish -Russian -US Arctic Ocean Investigation of Climate-Cryosphere-Carbon Interactions). The multibeam bathymetry and chirp sub-bottom profiles reveal a set of glacial landforms that include grounding zone formations along the outer continental shelf, seaward of which lies a > 65 m thick sequence of glacio-genic debris flows. The glacial landforms are interpreted to lie at the seaward end of a glacial trough -the first to be reported on the East Siberian margin, here referred to as the De Long Trough because of its location due north of the De Long Islands. Stratigraphy and dating of sediment cores show that a drape of acoustically laminated sediments covering the glacial deposits is older than ∼ 50 cal kyr BP. This provides direct evidence for extensive glacial activity on the Siberian shelf that predates the Last Glacial Maximum and most likely occurred during the Saalian (Marine Isotope Stage (MIS) 6).

show abstract

Section: Introductionmentioning

confidence: 99%

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

et al. 2017

View full text Add to dashboard Cite

show abstract

“…; Klemann et al . ). The maximum possible altitude of this ingression was ~40 m a.s.l., as only freshwater sediments were deposited during the Holocene in the Tvyordoe Lake basin, which is located 41 m a.s.l.…”

Section: Resultsmentioning

confidence: 97%

Lateglacial and Holocene palaeoenvironments on Bolshevik Island (Severnaya Zemlya), Russian High Arctic

Cherezova

Fedorov

Raschke

et al. 2020

Boreas

View full text Add to dashboard Cite

The late Quaternary climatic and environmental history of the Severnaya Zemlya Archipelago in the Russian High Arctic has been the focus of many palaeoenvironmental studies since the 1970s. However, the existing data are highly fragmentary and sometimes contradictory. New information concerning the archipelago's environmental history was derived from a 2.46‐m‐long sediment core from Lake Tvyordoe, located in the northwestern part of Bolshevik Island. The core was investigated by a multi‐proxy approach that comprises radiocarbon dating as well as lithological, granulometrical, palynological and geochemical analyses. The results provide new insights into the vegetation history as well as changes in lake level, lake‐ice cover, and water and sediment input since the Last Glacial Maximum (LGM). Fine‐grained, laminated sediments at the core base, which were dated to c. 24.2 cal. ka BP, suggest lacustrine sedimentation under a permanent ice cover with low meltwater supply. This, along with a lack of glacial and glacial‐lacustrine deposits, supports earlier assumptions that Bolshevik Island was not covered by the Barents‐Kara Ice Sheet during the LGM. Furthermore, even the Mushketov Ice Cap, the closest ice mass to Lake Tvyordoe, did not expand from the denudation plateau to the lake. During the terminal Pleistocene, starting c. 14.5 cal. ka BP, warmer and wetter climate conditions resulted in higher sediment loads. The most favourable environmental conditions prevailed on Bolshevik Island throughout the Early and Middle Holocene (c. 11.7–6.5 cal. ka BP), when low shrub tundra associations with dwarf birch, willow and alder dominated the vegetation. After c. 10.0 cal. ka BP, a shift to climate drying occurred, which, after 6.5 cal. ka BP, was accompanied by a climate cooling. The Late Holocene climate, according to pollen data (suggesting sparse lichen–moss–grass cover) and relatively low total organic carbon (TOC) contents, was rather similar to that during the Lateglacial.

show abstract

“…For cores 4-PC1 and 20-GC1, the modeled depths for a minimum age of ∼ 11.7 ka are respectively 47 and 42 m deeper than the estimates based on microfaunal depth zonation and the chronological constraints described above. While a fraction of this offset might be explained by hydro-isostasy (e.g., Klemann et al, 2015), this discrepancy might also be reconciled by (1) the presence of East Siberian Sea ice cover, perhaps on the continental shelf, (2) a forebulge along the ice periphery, and (3) a subsequent collapse following deglaciation. At present little evidence for LGM ice has been found in the East Siberian Sea or the Chukchi Sea, and previous suggestions for circum-Arctic glaciation (Grosswald and Hughes, 2002) conflict with apparent "icefree" LGM conditions on Wrangel Island (71 • N, 179 • W) and elsewhere in Eastern Siberia (e.g., Gualtieri et al, 2003 and references therein).…”

Section: Regional Sea Level Datums: Deglacial Sea Level In the Westermentioning

confidence: 99%

“…These would include areas like the mid-Atlantic region of eastern North America and Europe (Lambeck et al, 2011;Steffen and Wu, 2011) that were isostatically uplifted during peak glaciation and subsequently subsided in a collapsing forebulge. However, the western Arctic Ocean and the adjacent Siberian margin are relatively poorly known in terms of both regional sea level and glacial history (Klemann et al, 2015). It is especially important to investigate the SLR history of this region in light of recent submarine geophysical and sediment core evidence for extensive ice shelf and iceberg scouring during glacial periods in Marine Isotope Stage (MIS) 6, 4, and 2.…”

Section: Introductionmentioning

confidence: 99%

“…One exception is the study by Thomsen (2014, see also Hald et al, 2004) of Storfjorden, Svalbard that demonstrates the sensitivity of foraminiferal species to rapid deglacial and Holocene climate changes in a previously glaciated area. Unlike the Svalbard region, the East Siberian margin did not host a large LGM ice sheet (Svendsen et al, 2004;Jakobsson et al, 2014), but instead was located some distance from the Fennoscandian Ice Sheet and North American ice sheets (Peltier et al, 2015;Klemann et al, 2015). Thus, at least for much of the Younger Dryas and post-Younger Dryas intervals (12.8-10.7 ka), results presented here provide insight not only into Arctic sea level and glacial history and GIA models, but also extra-Arctic sea level records used to estimate global sea level patterns.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins

et al. 2017

View full text Add to dashboard Cite

Abstract. ka) sea level history on the East Siberian continental shelf and upper continental slope was reconstructed using new geophysical records and sediment cores taken during Leg 2 of the 2014 SWERUS-C3 expedition. The focus of this study is two cores from Herald Canyon, piston core SWERUS-L2-4-PC1 (4-PC1) and multicore SWERUS-L2-4-MC1 (4-MC1), and a gravity core from an East Siberian Sea transect, SWERUS-L2-20-GC1 (20-GC1). Cores 4-PC1 and 20-GC were taken at 120 and 115 m of modern water depth, respectively, only a few meters above the global last glacial maximum (LGM; ∼ 24 kiloannum or ka) minimum sea level of ∼ 125-130 meters below sea level (m b.s.l.). Using calibrated radiocarbon ages mainly on molluscs for chronology and the ecology of benthic foraminifera and ostracode species to estimate paleodepths, the data reveal a dominance of river-proximal species during the early part of the Younger Dryas event (YD, Greenland Stadial GS-1) followed by a rise in river-intermediate species in the late Younger Dryas or the early Holocene (Preboreal) period. A rapid relative sea level rise beginning at roughly 11.4 to 10.8 ka (∼ 400 cm of core depth) is indicated by a sharp faunal change and unconformity or condensed zone of sedimentation. Regional sea level at this time was about 108 m b.s.l. at the 4-PC1 site and 102 m b.s.l. at 20-GC1. Regional sea level near the end of the YD was up to 42-47 m lower than predicted by geophysical models corrected for glacio-isostatic adjustment. This discrepancy could be explained by delayed isostatic adjustment caused by a greater volume and/or geographical extent of glacial-age land ice and/or ice shelves in the western Arctic Ocean and adjacent Siberian land areas.

show abstract

Sea-level evolution of the Laptev Sea and the East Siberian Sea since the last glacial maximum

Cited by 32 publications

References 32 publications

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

The De Long Trough: a newly discovered glacial trough on the East Siberian continental margin

Lateglacial and Holocene palaeoenvironments on Bolshevik Island (Severnaya Zemlya), Russian High Arctic

Deglacial sea level history of the East Siberian Sea and Chukchi Sea margins

Contact Info

Product

Resources

About