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Diatom-reconstructed summer sea-surface temperatures and climatic events off North Iceland during the last deglaciation and Holocene

Sha, Longbin ; Knudsen, Karen Luise ; Eiríksson, Jón ; Björck, Svante LU ; Jiang, Hui ; Yang, Xiaodong ; Yu, Xubiao and Li, Dongling (2022) In Palaeogeography, Palaeoclimatology, Palaeoecology 602.
Abstract

Lateglacial and Holocene summer sea-surface temperature (SST) variability in the northern North Atlantic was reconstructed based on diatom records from two sediment cores from the North Icelandic shelf. The temperature changes are discussed in relation to palaeoceanographic circulation patterns and past climatic changes. Modern diatom data from surface sediments from around Iceland and Southeast and West Greenland, with known modern environmental variables, were used as the basis for the quantitative reconstruction of summer SST. The results show that summer SSTs varied during both the Lateglacial and the Holocene, but the amplitude of SST variations during the Lateglacial was greater than that during the Holocene. No pronounced warm or... (More)

Lateglacial and Holocene summer sea-surface temperature (SST) variability in the northern North Atlantic was reconstructed based on diatom records from two sediment cores from the North Icelandic shelf. The temperature changes are discussed in relation to palaeoceanographic circulation patterns and past climatic changes. Modern diatom data from surface sediments from around Iceland and Southeast and West Greenland, with known modern environmental variables, were used as the basis for the quantitative reconstruction of summer SST. The results show that summer SSTs varied during both the Lateglacial and the Holocene, but the amplitude of SST variations during the Lateglacial was greater than that during the Holocene. No pronounced warm or cool events were recorded on the North Icelandic shelf during the GI-1e to GI-1a events (Bølling-Allerød) and the GS-1 event (Younger Dryas). The changes in SST were possibly caused by major changes in the ocean circulation pattern around Iceland, and by minor variations in the interaction between the cold and warm currents in the region. Comparison of the reconstructed summer SSTs with other marine records from the North Atlantic suggests an antiphase relationship between the oceanic climatic responses off North Iceland and in the eastern North Atlantic during the Lateglacial and the earliest part of the Holocene (the Preboreal).

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organization
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Contribution to journal
publication status
published
subject
keywords
Diatoms, Holocene, Lateglacial, North Icelandic shelf, Palaeoceanographic changes, Quantitative reconstruction
in
Palaeogeography, Palaeoclimatology, Palaeoecology
volume
602
article number
111154
publisher
Elsevier
external identifiers
  • scopus:85135033225
ISSN
0031-0182
DOI
10.1016/j.palaeo.2022.111154
language
English
LU publication?
yes
id
83b87069-a7a5-4830-b494-1048c63c530f
date added to LUP
2022-10-07 13:55:18
date last changed
2023-05-10 11:25:33
@article{83b87069-a7a5-4830-b494-1048c63c530f,
  abstract     = {{<p>Lateglacial and Holocene summer sea-surface temperature (SST) variability in the northern North Atlantic was reconstructed based on diatom records from two sediment cores from the North Icelandic shelf. The temperature changes are discussed in relation to palaeoceanographic circulation patterns and past climatic changes. Modern diatom data from surface sediments from around Iceland and Southeast and West Greenland, with known modern environmental variables, were used as the basis for the quantitative reconstruction of summer SST. The results show that summer SSTs varied during both the Lateglacial and the Holocene, but the amplitude of SST variations during the Lateglacial was greater than that during the Holocene. No pronounced warm or cool events were recorded on the North Icelandic shelf during the GI-1e to GI-1a events (Bølling-Allerød) and the GS-1 event (Younger Dryas). The changes in SST were possibly caused by major changes in the ocean circulation pattern around Iceland, and by minor variations in the interaction between the cold and warm currents in the region. Comparison of the reconstructed summer SSTs with other marine records from the North Atlantic suggests an antiphase relationship between the oceanic climatic responses off North Iceland and in the eastern North Atlantic during the Lateglacial and the earliest part of the Holocene (the Preboreal).</p>}},
  author       = {{Sha, Longbin and Knudsen, Karen Luise and Eiríksson, Jón and Björck, Svante and Jiang, Hui and Yang, Xiaodong and Yu, Xubiao and Li, Dongling}},
  issn         = {{0031-0182}},
  keywords     = {{Diatoms; Holocene; Lateglacial; North Icelandic shelf; Palaeoceanographic changes; Quantitative reconstruction}},
  language     = {{eng}},
  publisher    = {{Elsevier}},
  series       = {{Palaeogeography, Palaeoclimatology, Palaeoecology}},
  title        = {{Diatom-reconstructed summer sea-surface temperatures and climatic events off North Iceland during the last deglaciation and Holocene}},
  url          = {{http://dx.doi.org/10.1016/j.palaeo.2022.111154}},
  doi          = {{10.1016/j.palaeo.2022.111154}},
  volume       = {{602}},
  year         = {{2022}},
}