Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast
A pollen-based quantitative climate reconstruction from a lake-sediment core on the Norwegian Barents Sea coast provides insights about climatic change over the Greenland stadial 1 (GS-1) to early-Holocene transition. GS-1 was characterized by low July mean temperatures (c. 6.0degreesC) and dry cond...
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2002
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ftucl:oai:eprints.ucl.ac.uk.OAI2:155956 2023-05-15T15:09:31+02:00 Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast Seppa, H Birks, HH Birks, HJB 2002-08-01 http://discovery.ucl.ac.uk/155956/ unknown TAYLOR & FRANCIS AS BOREAS , 31 (3) pp. 215-225. (2002) TREE-LINE AREA GLACIAL LAKE AGASSIZ WESTERN NORWAY NORTHERN NORWAY ICE-CORE THERMOHALINE CIRCULATION PREBOREAL OSCILLATION VARANGER-PENINSULA LAST DEGLACIATION NORDIC SEAS Article 2002 ftucl 2016-01-21T23:12:27Z A pollen-based quantitative climate reconstruction from a lake-sediment core on the Norwegian Barents Sea coast provides insights about climatic change over the Greenland stadial 1 (GS-1) to early-Holocene transition. GS-1 was characterized by low July mean temperatures (c. 6.0degreesC) and dry conditions probably resembling modern arctic deserts. The increase in July mean temperatures to the Holocene level (10.0-12.0degreesC) took place in a two-step pattern interrupted by a short cool period with July mean temperatures of c. 8.0degreesC during the early Preboreal at c. 11450-11200 cal. yr BP. The reconstruction also suggests two other early-Holocene coolings of c. 1.5degreesC, dating to 10900-10800 cal. yr BP and 10400-10200 cal. yr BP, synchronously with short-term decreases in delta(18)O values in the Greenland ice cores. These results reflect the highly unstable nature of the early-Holocene climate in northernmost Fennoscandia. Apart from the cooling at 10900-10800 cal. yr BP, the reconstructed cold events correlate with fluxes of fresh water to the North Atlantic and related reductions of North Atlantic deep-water formation, suggesting that the rapid climate changes resulted from the dynamics of the North Atlantic thermohaline circulation and oceanic energy transport during the GS-1 to early-Holocene transition. Article in Journal/Newspaper Arctic Barents Sea Fennoscandia Greenland Greenland ice cores ice core Nordic Seas North Atlantic Deep Water North Atlantic North atlantic Thermohaline circulation Northern Norway Varanger University College London: UCL Discovery Arctic Barents Sea Glacial Lake ENVELOPE(-129.463,-129.463,58.259,58.259) Greenland Norway |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
unknown |
topic |
TREE-LINE AREA GLACIAL LAKE AGASSIZ WESTERN NORWAY NORTHERN NORWAY ICE-CORE THERMOHALINE CIRCULATION PREBOREAL OSCILLATION VARANGER-PENINSULA LAST DEGLACIATION NORDIC SEAS |
spellingShingle |
TREE-LINE AREA GLACIAL LAKE AGASSIZ WESTERN NORWAY NORTHERN NORWAY ICE-CORE THERMOHALINE CIRCULATION PREBOREAL OSCILLATION VARANGER-PENINSULA LAST DEGLACIATION NORDIC SEAS Seppa, H Birks, HH Birks, HJB Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast |
topic_facet |
TREE-LINE AREA GLACIAL LAKE AGASSIZ WESTERN NORWAY NORTHERN NORWAY ICE-CORE THERMOHALINE CIRCULATION PREBOREAL OSCILLATION VARANGER-PENINSULA LAST DEGLACIATION NORDIC SEAS |
description |
A pollen-based quantitative climate reconstruction from a lake-sediment core on the Norwegian Barents Sea coast provides insights about climatic change over the Greenland stadial 1 (GS-1) to early-Holocene transition. GS-1 was characterized by low July mean temperatures (c. 6.0degreesC) and dry conditions probably resembling modern arctic deserts. The increase in July mean temperatures to the Holocene level (10.0-12.0degreesC) took place in a two-step pattern interrupted by a short cool period with July mean temperatures of c. 8.0degreesC during the early Preboreal at c. 11450-11200 cal. yr BP. The reconstruction also suggests two other early-Holocene coolings of c. 1.5degreesC, dating to 10900-10800 cal. yr BP and 10400-10200 cal. yr BP, synchronously with short-term decreases in delta(18)O values in the Greenland ice cores. These results reflect the highly unstable nature of the early-Holocene climate in northernmost Fennoscandia. Apart from the cooling at 10900-10800 cal. yr BP, the reconstructed cold events correlate with fluxes of fresh water to the North Atlantic and related reductions of North Atlantic deep-water formation, suggesting that the rapid climate changes resulted from the dynamics of the North Atlantic thermohaline circulation and oceanic energy transport during the GS-1 to early-Holocene transition. |
format |
Article in Journal/Newspaper |
author |
Seppa, H Birks, HH Birks, HJB |
author_facet |
Seppa, H Birks, HH Birks, HJB |
author_sort |
Seppa, H |
title |
Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast |
title_short |
Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast |
title_full |
Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast |
title_fullStr |
Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast |
title_full_unstemmed |
Rapid climatic changes during the Greenland stadial 1 (Younger Dryas) to early Holocene transition on the Norwegian Barents Sea coast |
title_sort |
rapid climatic changes during the greenland stadial 1 (younger dryas) to early holocene transition on the norwegian barents sea coast |
publisher |
TAYLOR & FRANCIS AS |
publishDate |
2002 |
url |
http://discovery.ucl.ac.uk/155956/ |
long_lat |
ENVELOPE(-129.463,-129.463,58.259,58.259) |
geographic |
Arctic Barents Sea Glacial Lake Greenland Norway |
geographic_facet |
Arctic Barents Sea Glacial Lake Greenland Norway |
genre |
Arctic Barents Sea Fennoscandia Greenland Greenland ice cores ice core Nordic Seas North Atlantic Deep Water North Atlantic North atlantic Thermohaline circulation Northern Norway Varanger |
genre_facet |
Arctic Barents Sea Fennoscandia Greenland Greenland ice cores ice core Nordic Seas North Atlantic Deep Water North Atlantic North atlantic Thermohaline circulation Northern Norway Varanger |
op_source |
BOREAS , 31 (3) pp. 215-225. (2002) |
_version_ |
1766340703299829760 |