Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland
Diatom assemblages from Holsteinsborg Dyb on the West Greenland shelf were analysed with high temporal resolution for the last 1200 years. A high degree of consistency between changes in frequency of selected diatom species and instrumental data from the same area during the last 70 years confirms t...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.783985 2023-05-15T16:26:54+02:00 Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland Sha, Longbin Jiang, Hui Knudsen, Karen Luise LATITUDE: 66.744700 * LONGITUDE: -53.940300 * DATE/TIME START: 2006-08-01T00:00:00 * DATE/TIME END: 2007-04-01T00:00:00 2012-06-13 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.783985 https://doi.org/10.1594/PANGAEA.783985 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.783985 https://doi.org/10.1594/PANGAEA.783985 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Sha, Longbin; Jiang, Hui; Knudsen, Karen Luise (2012): Diatom evidence of climatic change in Holsteinsborg Dyb, west of Greenland, during the last 1200 years. The Holocene, 22(3), 347-358, https://doi.org/10.1177/0959683611423684 BC Box corer GA306-BC4 GA306-GC4 Galathea 3 GC Gravity corer Greenland Sea HDMS Vaedderen Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.783985 https://doi.org/10.1177/0959683611423684 2023-01-20T07:32:34Z Diatom assemblages from Holsteinsborg Dyb on the West Greenland shelf were analysed with high temporal resolution for the last 1200 years. A high degree of consistency between changes in frequency of selected diatom species and instrumental data from the same area during the last 70 years confirms the reliability of diatoms (particularly sea-ice species and warm-water species) for the study of palaeoceanographic changes in this area. A general cooling trend with some fluctuations is marked by an increase in sea-ice species throughout the last 1200 years. A relatively warm period with increased influence of Atlantic water masses of the Irminger Current (IC) is found at AD 750-1330, although with some oceanographic variability after AD 1000. A pronounced oceanographic shift occurred at AD 1330, corresponding in time to the transition from the so-called 'Medieval Warm Period' (MWP) to the 'Little Ice Age' (LIA). The LIA cold episode is characterized by three intervals with particularly cold sea-surface conditions at AD 1330-1350, AD 1400-1575 and AD 1660-1710 as a result of variable influence of Polar waters in the area. During the last 70 years, two relatively warm periods and one cold period (the early 1960s to mid-1990s) are indicated by changes in the diatom components. Our study demonstrates that sedimentary records on the West Greenland shelf provide valuable palaeoenvironment data that confirm a linkage between local and large-scale North Atlantic oceanographic and atmospheric oscillations. Dataset Greenland Greenland Sea North Atlantic Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Greenland ENVELOPE(-53.940300,-53.940300,66.744700,66.744700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
BC Box corer GA306-BC4 GA306-GC4 Galathea 3 GC Gravity corer Greenland Sea HDMS Vaedderen |
spellingShingle |
BC Box corer GA306-BC4 GA306-GC4 Galathea 3 GC Gravity corer Greenland Sea HDMS Vaedderen Sha, Longbin Jiang, Hui Knudsen, Karen Luise Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland |
topic_facet |
BC Box corer GA306-BC4 GA306-GC4 Galathea 3 GC Gravity corer Greenland Sea HDMS Vaedderen |
description |
Diatom assemblages from Holsteinsborg Dyb on the West Greenland shelf were analysed with high temporal resolution for the last 1200 years. A high degree of consistency between changes in frequency of selected diatom species and instrumental data from the same area during the last 70 years confirms the reliability of diatoms (particularly sea-ice species and warm-water species) for the study of palaeoceanographic changes in this area. A general cooling trend with some fluctuations is marked by an increase in sea-ice species throughout the last 1200 years. A relatively warm period with increased influence of Atlantic water masses of the Irminger Current (IC) is found at AD 750-1330, although with some oceanographic variability after AD 1000. A pronounced oceanographic shift occurred at AD 1330, corresponding in time to the transition from the so-called 'Medieval Warm Period' (MWP) to the 'Little Ice Age' (LIA). The LIA cold episode is characterized by three intervals with particularly cold sea-surface conditions at AD 1330-1350, AD 1400-1575 and AD 1660-1710 as a result of variable influence of Polar waters in the area. During the last 70 years, two relatively warm periods and one cold period (the early 1960s to mid-1990s) are indicated by changes in the diatom components. Our study demonstrates that sedimentary records on the West Greenland shelf provide valuable palaeoenvironment data that confirm a linkage between local and large-scale North Atlantic oceanographic and atmospheric oscillations. |
format |
Dataset |
author |
Sha, Longbin Jiang, Hui Knudsen, Karen Luise |
author_facet |
Sha, Longbin Jiang, Hui Knudsen, Karen Luise |
author_sort |
Sha, Longbin |
title |
Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland |
title_short |
Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland |
title_full |
Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland |
title_fullStr |
Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland |
title_full_unstemmed |
Radiocarbon ages and diatom abundance in cores GA306-BC4 and GA306-GC4 obtained during Galathea 3 cruise, West Greenland |
title_sort |
radiocarbon ages and diatom abundance in cores ga306-bc4 and ga306-gc4 obtained during galathea 3 cruise, west greenland |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.783985 https://doi.org/10.1594/PANGAEA.783985 |
op_coverage |
LATITUDE: 66.744700 * LONGITUDE: -53.940300 * DATE/TIME START: 2006-08-01T00:00:00 * DATE/TIME END: 2007-04-01T00:00:00 |
long_lat |
ENVELOPE(-53.940300,-53.940300,66.744700,66.744700) |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Sea North Atlantic Sea ice |
genre_facet |
Greenland Greenland Sea North Atlantic Sea ice |
op_source |
Supplement to: Sha, Longbin; Jiang, Hui; Knudsen, Karen Luise (2012): Diatom evidence of climatic change in Holsteinsborg Dyb, west of Greenland, during the last 1200 years. The Holocene, 22(3), 347-358, https://doi.org/10.1177/0959683611423684 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.783985 https://doi.org/10.1594/PANGAEA.783985 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.783985 https://doi.org/10.1177/0959683611423684 |
_version_ |
1766015920512172032 |