Journal cover Journal topic
Climate of the Past An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/cp-2017-53
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
27 Mar 2017
Review status
This discussion paper is under review for the journal Climate of the Past (CP).
Atlantic Water advection vs glacier dynamics in northern Spitsbergen since early deglaciation
Martin Bartels1, Jürgen Titschack1,2, Kirsten Fahl3, Rüdiger Stein3, Marit-Solveig Seidenkrantz4, Claude Hillaire-Marcel5, and Dierk Hebbeln1 1MARUM – Center for Marine Environmental Sciences, University of Bremen, 28359 Bremen, Germany
2SaM – Senckenberg am Meer, Abteilung Meeresforschung, 26382 Wilhelmshaven, Germany
3Alfred Wegener Institute for Polar and Marine Research, 27568 Bremerhaven, Germany
4Centre for Past Climate Studies and Arctic Research Centre, Department of Geoscience, Aarhus University, 8000 Aarhus C, Denmark
5GEOTOP – Université du Québec à Montréal, Montreal, H3C 3P8, Canada
Abstract. Atlantic Water (AW) advection plays an important role for climatic, oceanographic and environmental conditions in the eastern Arctic. Situated along the only deep connection between the Atlantic and the Arctic Ocean, the Svalbard Archipelago is an ideal location to reconstruct the past AW advection history and document its linkage with local glacier dynamics, as illustrated in the present study of a sedimentary record from Woodfjorden (northern Spitsbergen) spanning the last ~ 15 500 years. Sedimentological, micropalaeontological and geochemical analyses were used to reconstruct changes in marine environmental conditions, sea-ice cover and glacier activity. Data illustrate a partial breakup of the Svalbard–Barents–Sea Ice Sheet from Heinrich Stadial 1 onwards (until ~ 14.6 ka BP). During the Bølling-Allerød (~ 14.6–12.7 ka BP), AW penetrated as a bottom water mass into the fjord system and contributed significantly to the destabilisation of local glaciers. During the Younger Dryas (~ 12.7–11.7 ka BP), it intruded into intermediate waters while evidence for a glacier advance is lacking. A short-term deepening of the halocline occurred at the very end of this interval. During the early Holocene (~ 11.7–7.8 ka BP), mild conditions led to glacier retreat, a reduced sea-ice cover and increasing sea surface temperatures, with a brief interruption during the Preboreal Oscillation (~ 11.1–10.8 ka BP). During the late Holocene (~ 1.8–0.4 ka BP), a slightly reduced AW inflow and lower sea surface temperatures compared to the early Holocene are reconstructed. Glaciers, which previously retreated to the shallower inner parts of the Woodfjorden system, likely advanced during the late Holocene. In particular, as topographic control in concert with the reduced summer insolation partly decoupled glacier dynamics from AW advection during this recent interval.

Citation: Bartels, M., Titschack, J., Fahl, K., Stein, R., Seidenkrantz, M.-S., Hillaire-Marcel, C., and Hebbeln, D.: Atlantic Water advection vs glacier dynamics in northern Spitsbergen since early deglaciation, Clim. Past Discuss., https://doi.org/10.5194/cp-2017-53, in review, 2017.
Martin Bartels et al.
Martin Bartels et al.
Martin Bartels et al.

Viewed

Total article views: 559 (including HTML, PDF, and XML)

HTML PDF XML Total BibTeX EndNote
409 102 48 559 2 47

Views and downloads (calculated since 27 Mar 2017)

Cumulative views and downloads (calculated since 27 Mar 2017)

Viewed (geographical distribution)

Total article views: 559 (including HTML, PDF, and XML)

Thereof 557 with geography defined and 2 with unknown origin.

Country # Views %
  • 1

Saved

Discussed

Latest update: 25 Jul 2017
Publications Copernicus
Download
Short summary
Multi-proxy analyses (i.a., benthic foraminiferal assemblages and sedimentary properties) of a marine record from Woodfjorden at the northern Svalbard margin (Norwegian Arctic) illustrate a significant contribution of relatively warm Atlantic Water to the destabilisation of tidewater glaciers, especially during the deglaciation and the subsequent early Holocene (until ~ 7800 years ago), whereas its influence on glacier activity is fading during the last two millennia enabling glacier re-advances.
Multi-proxy analyses (i.a., benthic foraminiferal assemblages and sedimentary properties) of a...
Share