Atlantic Water advection vs. glacier dynamics in northern Spitsbergen since early deglaciation

Bartels, Martin; Titschack, Jürgen; Fahl, Kirsten; Stein, Rüdiger; Seidenkrantz, Marit‐Solveig; Hillaire‐Marcel, Claude; Hebbeln, Dierk

doi:10.5194/cp-13-1717-2017

Cited by 40 publications

(26 citation statements)

References 200 publications

(275 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Archive halves of the sediment core were scanned by a computed tomography (CT) at the hospital Klinikum Bremen-Mitte. The CT-based IRD quantification was performed following the methodology of Bartels et al (2017). Only clast segmentation was optimized by combining threshold segmentation with a surface-volume ratio filter to remove falsely segmented bioturbation traces.…”

Section: Methodsmentioning

confidence: 99%

“…In their 10 Be-based study, Hormes et al (2011) showed that some smaller ice domes covered Nordaustlandet during the late Weichselian, probably coalescing archipelago. The entire region has been directly affected by AWadvection (Lubinski et al 2001;Slubowska et al 2005;Rasmussen et al 2007Rasmussen et al , 2012; Slubowska-Wolden-gen et al 2007;Skirbekk et al 2010;Kubischta et al 2011;Klitgaard Kristensen et al 2013; Ła z cka et al 2015; Bartels et al 2017). The present study investigates the Holocene palaeoenvironmental development within the remote Wahlenbergfjord.…”

mentioning

confidence: 90%

“…Yellow dots mark core location GeoB10831-3 of the present study and further core sites mentioned in the text. a = NP05-71 ); b = Isvika 1 (Kubischta et al 2011);c = NP94-51 (Koc ß et al 2002;Slubowska et al 2005;Slubowska-Woldengen et al 2007;Jernas et al 2013); d = GeoB10817-4 ( Bartels et al 2017); e = NP05-11-21 (Skirbekk et al 2010;Jernas et al 2013;Rasmussen et al 2014b); f = MSM5/ 5-712-1 Werner et al 2011Werner et al , 2013Werner et al , 2014M€ uller et al 2012); g = JM98-845 (Rasmussen et al 2012); h = MD99-2304 (Hald et al 2004); i = MD99-2305 (Hald et al 2004); j = JM02-440 ( Slubowska-Woldengen et al 2007); k = HR3 (Majewski et al 2009); l = JM02-460 (Rasmussen et al 2007;Rasmussen & Thomsen 2014); m = JM09-020 (Ła z cka et al 2015). B. Northeastern Spitsbergen and western Nordaustlandet with main icecaps Vestfonna and Austfonna surrounding Wahlenbergfjord.…”

Section: Wahlenbergfjordlocal Settingmentioning

confidence: 99%

See 2 more Smart Citations

Wahlenbergfjord, eastern Svalbard: a glacier‐surrounded fjord reflecting regional hydrographic variability during the Holocene?

Bartels

Titschack

Fahl

et al. 2018

Boreas

Self Cite

View full text Add to dashboard Cite

Exceptionally high sedimentation rates in Arctic fjords provide the possibility to reconstruct environmental conditions in high temporal resolution during the (pre-)Holocene. The unique geographical location of Svalbard at the intersection of Arctic and Atlantic waters offers the opportunity to estimate local (mainly glacier-related) vs. regional (hydrographic) variabilities. Sedimentological, micropalaeontological and geochemical data from the very remote, glacier-surrounded Wahlenbergfjord in eastern Svalbard provides information on glacier dynamics, palaeoceanographic and sea-ice conditions during the Holocene. The present study illustrates a high meltwater discharge during the summer insolation maximum (c. 11.3-7.7 ka) when the intrusion of upwelled relatively warm Atlantic-derived waters led to an almost open fjord situation with reduced sea ice in summer. Around 7.7 ka, a rapid hydrographic shift occurred: the dominance of inflowing Atlantic-derived waters was replaced by a stronger influence of Arctic Water reflecting regional palaeoceanographic conditions evident in the benthic foraminiferal fauna also at Svalbard's margins. Neoglacial conditions characterized the late Holocene (c. 3.1-0.2 ka), when glaciers probably advanced as cold atmospheric temperatures were decoupled from the advection of relatively warm intermediate waters probably caused by an extending sea-ice coverage. Accordingly, our data show that even a remote, glacier-proximal study site reflects rapid as well as longer-term regional changes.

show abstract

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 90%

Section: Wahlenbergfjordlocal Settingmentioning

confidence: 99%

See 1 more Smart Citation

Wahlenbergfjord, eastern Svalbard: a glacier‐surrounded fjord reflecting regional hydrographic variability during the Holocene?

Bartels

Titschack

Fahl

et al. 2018

Boreas

Self Cite

View full text Add to dashboard Cite

show abstract

“…In modern Greenland and Svalbard shelf and fjord environments, C. neoteretis thrives in relatively cool (À1 to 2°C), saline (34.9 practical salinity unit, psu) bottom water conditions, and C. reniforme prefers colder water (<2°C) and also relatively high salinity (>30 psu) environments (Hald & Korsun, 1997;Jennings et al, 2004;Polyak, Korsun, et al, 2002;Polyak, Levitan, et al, 2002;Steinsund et al, 1994). Thus, in Arctic shelf regions, both species are commonly associated with the advection of chilled subsurface Atlantic waters (Bartels et al, 2017;Hald & Korsun, 1997;Jennings et al, 2004;Lubinski et al, 2001;Mackensen & Hald, 1988;Polyak & Mikhailov, 1996;Polyak, Levitan, et al, 2002;Seidenkrantz et al, 2013). The relatively high abundance of N. pachyderma and the presence of heterotrophic dinocyst species in an area characterized by semiperennial sea ice cover (subdomain II) would further support the advection of Atlantic waters through subsurface currents, as planktic foraminifera likely do not live here and the specimens would all have been carried to the site from the open shelf.…”

Section: Tracing Arctic-atlantic Inflowmentioning

confidence: 99%

Linking the Modern Distribution of Biogenic Proxies in High Arctic Greenland Shelf Sediments to Sea Ice, Primary Production, and Arctic‐Atlantic Inflow

et al. 2018

Self Cite

View full text Add to dashboard Cite

The eastern north coast of Greenland is considered to be highly sensitive to the ongoing Arctic warming, but there is a general lack of data on modern conditions and in particular on the modern distribution of climate and environmental proxies to provide a baseline and context for studies on past variability. Here we present a detailed investigation of 11 biogenic proxies preserved in surface sediments from the remote High Arctic Wandel Sea shelf, the entrance to the Independence, Hagen, and Danmark fjords. The composition of organic matter (organic carbon, C:N ratios, δ13C, δ15N, biogenic silica, and IP25) and microfossil assemblages revealed an overall low primary production dominated by benthic diatoms, especially at the shallow sites. While the benthic and planktic foraminiferal assemblages underline the intrusion of chilled Atlantic waters into the deeper parts of the study area, the distribution of organic‐walled dinoflagellate cysts is controlled by the local bathymetry and sea ice conditions. The distribution of the dinoflagellate cyst Polarella glacialis matches that of seasonal sea ice and the specific biomarker IP25, highlighting the potential of this species for paleo sea ice studies. The information inferred from our multiproxy study has important implications for the interpretation of the biogenic‐proxy signal preserved in sediments from circum‐Arctic fjords and shelf regions and can serve as a baseline for future studies. This is the first study of its kind in this area.

show abstract

“…yr. BP than they are today, based on the presence of Zirfaea crispate. Bartels et al (2017) argues that sea surface temperatures were warmer at the head of Woodfjorden during the early Holocene, with reduced sea ice coverage and open waters. Alkenone-based temperature reconstructions from Amsterdamøya and Mitrahalvøya, Figure 11B, suggests an early Holocene warming of 4.5 • C at 10500 cal.…”

Section: Warm and Wet Early-and Dry Mid-holocenementioning

confidence: 99%

Reconstructing Holocene Glacier and Climate Fluctuations From Lake Sediments in Vårfluesjøen, Northern Spitsbergen

et al. 2018

View full text Add to dashboard Cite

A process-based understanding of lacustrine deposited sediments in Arctic lakes is essential to set the present warming and hydroclimatic shift into perspective. From such a perspective, we can enhance our understanding of the natural climate variability in the Arctic. Here, we present work from the northern coast of Spitsbergen in which we unravel the sediment sequence from a distal glacier-fed lake, Vårfluesjøen. Utilizing recent methodological and technological developments, we base our interpretation on new tools that better visualize and characterize the sediments cores. High-resolution X-ray Computed Tomography (X-ray CT) is used to visualize the lake sediments and quantify the sand-sized particles found in the 210 Pb-and radiocarbon-dated sediments, together with a multi-proxy approach including measurement of their physical, geochemical, and magnetic properties. Our findings suggest that Vårfluesjøen (6 m a.s

show abstract

Atlantic Water advection vs. glacier dynamics in northern Spitsbergen since early deglaciation

Cited by 40 publications

References 200 publications

Wahlenbergfjord, eastern Svalbard: a glacier‐surrounded fjord reflecting regional hydrographic variability during the Holocene?

Wahlenbergfjord, eastern Svalbard: a glacier‐surrounded fjord reflecting regional hydrographic variability during the Holocene?

Linking the Modern Distribution of Biogenic Proxies in High Arctic Greenland Shelf Sediments to Sea Ice, Primary Production, and Arctic‐Atlantic Inflow

Reconstructing Holocene Glacier and Climate Fluctuations From Lake Sediments in Vårfluesjøen, Northern Spitsbergen

Contact Info

Product

Resources

About