Deglacial-Holocene Svalbard paleoceanography and evidence of meltwater pulse 1B

QUATERNARY SCIENCE REVIEWS

卷:233

Article

Tian, Skye Yunshu^1,2  Yasuhara, Moriaki^1,2  Hong, Yuanyuan^1,2  Huang, Huai-Hsuan M.^1,2,3  Iwatani, Hokuto^1,2,4  Chiu, Wing-Tung Ruby^1,2  Mamo, Briony^1,2  Okahashi, Hisayo^1,2  Rasmussen, Tine L.⁵ 

[1] Univ Hong Kong, Sch Biol Sci, Kadoorie Biol Sci Bldg,Pokfulam Rd, Hong Kong, Peoples R China

[2] Univ Hong Kong, Swire Inst Marine Sci, Kadoorie Biol Sci Bldg,Pokfulam Rd, Hong Kong, Peoples R China

[3] Univ Erlangen Nurnberg, GeoZentrum Nordbayern, Loewenichstr 28, D-91054 Erlangen, Germany

[4] Yamaguchi Univ, Grad Sch Sci & Technol Innovat, Div Earth Sci, Yoshida 1677-1, Yamaguchi 7538511, Japan

[5] UiT Arctic Univ Norway, CAGE Ctr Arctic Gas Hydrate Environm & Climate, Dept Geol, Dramsveien 201, N-9037 Tromso, Norway

关键词: The last deglaciation;    Holocene;    Sea level change;    Neoglaciation;    Paleoceanography;    Arctic ocean;    Micropaleontology;    Ostracoda;   

DOI  :  10.1016/j.quascirev.2020.106237

来源: Elsevier

【 摘 要 】

Better understanding of deglacial meltwater pulses (MWPs) is imperative for future predictions of human-induced warming and abrupt sea-level change because of their potential for catastrophic damage. However, our knowledge of the second largest meltwater pulse MWP-1B that occurred shortly after the start of the Holocene interglacial remains very limited. Here, we studied fossil ostracods as paleo-environmental indicators of water depth, salinity, and temperature in two marine sediment cores from Storfjorden, Svalbard margin (the Arctic Ocean), to investigate near-field (i.e. areas located beneath continental ice sheets at the Last Glacial Maximum) evidence of MWP-1B. The depositional environment changed from a cold bathyal environment to a warmer bathyal environment at similar to 11,300 yr BP indicating incursion of warm Atlantic water into the Nordic seas, and eventually to a cold neritic environment by -11,000 yr BP because of melting of the Svalbard-Barents Sea ice sheet and resultant isostatic rebound. This process corresponds to rapid relative sea-level fall of 40-80 m of MWP-1B from similar to 11,300 to 11,000 yr BP. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

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