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Younger Dryas ice margin retreat triggered by ocean surface warming in central-eastern Baffin Bay

Younger Dryas ice margin retreat triggered by ocean surface warming in central-eastern Baffin Bay

Titill: Younger Dryas ice margin retreat triggered by ocean surface warming in central-eastern Baffin Bay
Höfundur: Oksman, Mimmi
Weckström, Kaarina
Miettinen, Arto
Juggins, Stephen
Divine, Dmitry V.
Jackson, Rebecca
Telford, Richard
Korsgaard, Niels Jakup
Kucera, Michal
Útgáfa: 2017-10-18
Tungumál: Enska
Umfang: 1017
Háskóli/Stofnun: Háskóli Íslands
University of Iceland
Svið: Verkfræði- og náttúruvísindasvið (HÍ)
School of Engineering and Natural Sciences (UI)
Deild: Jarðvísindastofnun (HÍ)
Institute of Earth Sciences (UI)
Birtist í: Nature Communications;8(1)
ISSN: 2041-1723
DOI: 10.1038/s41467-017-01155-6
Efnisorð: Palaeoceanography; Palaeoclimate; Haffræði; Loftslagsfræði; Ísöld
URI: https://hdl.handle.net/20.500.11815/528

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Tilvitnun:

Oksman, M., Weckström, K., Miettinen, A., Juggins, S., Divine, D. V., Jackson, R., . . . Kucera, M. (2017). Younger Dryas ice margin retreat triggered by ocean surface warming in central-eastern Baffin Bay. Nature Communications, 8(1), 1017. doi:10.1038/s41467-017-01155-6

Útdráttur:

The transition from the last ice age to the present-day interglacial was interrupted by the Younger Dryas (YD) cold period. While many studies exist on this climate event, only few include high-resolution marine records that span the YD. In order to better understand the interactions between ocean, atmosphere and ice sheet stability during the YD, more high-resolution proxy records from the Arctic, located proximal to ice sheet outlet glaciers, are required. Here we present the first diatom-based high-resolution quantitative reconstruction of sea surface conditions from central-eastern Baffin Bay, covering the period 14.0–10.2 kyr BP. Our record reveals warmer sea surface conditions and strong interactions between the ocean and the West Greenland ice margin during the YD. These warmer conditions were caused by increased Atlantic-sourced water inflow combined with amplified seasonality. Our results emphasize the importance of the ocean for ice sheet stability under the current changing climate.

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