Biomarker records of environmental shifts on the Labrador Shelf during the Holocene
The ultimate demise of the Laurentide Ice Sheet (LIS) and the preceding and succeeding oceanographic changes along the western Labrador Sea offer insights critically important to improve climate predictions of expected future climate warming and further melting of the Greenland ice cap. However, whi...
Published in: | Paleoceanography and Paleoclimatology |
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Language: | English |
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2023
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Online Access: | https://doi.org/10.1029/2022PA004578 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00830-3 https://macau.uni-kiel.de/receive/macau_mods_00004159 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00005319/Paleoceanog%20and%20Paleoclimatol%20-%202023%20-%20Kolling%20-%20Biomarker%20Records%20of%20Environmental%20Shifts%20on%20the%20Labrador%20Shelf%20During%20the.pdf |
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ftunivkiel:oai:macau.uni-kiel.de:macau_mods_00004159 2024-06-23T07:51:30+00:00 Biomarker records of environmental shifts on the Labrador Shelf during the Holocene Kolling, Henriette Marie Schneider, Ralph Gross, Felix Hamann, Christian Kienast, Markus Kienast, Stephanie Doering, Kristin Fahl, Kirsten Stein, Ruediger 2023 https://doi.org/10.1029/2022PA004578 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00830-3 https://macau.uni-kiel.de/receive/macau_mods_00004159 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00005319/Paleoceanog%20and%20Paleoclimatol%20-%202023%20-%20Kolling%20-%20Biomarker%20Records%20of%20Environmental%20Shifts%20on%20the%20Labrador%20Shelf%20During%20the.pdf eng eng Paleoceanography and Paleoclimatology -- 2572-4525 -- 2572-4525 https://doi.org/10.1029/2022PA004578 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00830-3 https://macau.uni-kiel.de/receive/macau_mods_00004159 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00005319/Paleoceanog%20and%20Paleoclimatol%20-%202023%20-%20Kolling%20-%20Biomarker%20Records%20of%20Environmental%20Shifts%20on%20the%20Labrador%20Shelf%20During%20the.pdf https://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess article ScholarlyArticle Published Version ddc:550 sea ice Atlantic Ocean IP25 8.2 event article Text doc-type:Article 2023 ftunivkiel https://doi.org/10.1029/2022PA004578 2024-06-12T14:18:00Z The ultimate demise of the Laurentide Ice Sheet (LIS) and the preceding and succeeding oceanographic changes along the western Labrador Sea offer insights critically important to improve climate predictions of expected future climate warming and further melting of the Greenland ice cap. However, while the final disappearance of the LIS during the Holocene is rather well constrained, the response of sea ice during the resulting meltwater events is not fully understood. Here, we present reconstructions of paleoceanographic changes over the past 9.3 Kyr BP on the northwestern Labrador Shelf, with a special focus on the interaction between the final meltwater event around 8.2 Kyr BP and sea ice and phytoplankton productivity (e.g., IP25, HBI III (Z), brassicasterol, dinosterol, biogenic opal, total organic carbon). Our records indicate low sea-ice cover and high phytoplankton productivity on the Labrador Shelf prior to 8.9 Kyr BP, sea-ice formation was favored by decreased surface salinities due to the meltwater events from Lake Agassiz-Ojibway and the Hudson Bay Ice Saddle from 8.55 Kyr BP onwards. For the past ca. 7.5 Kyr BP sea ice is mainly transported to the study area by local ocean currents such as the inner Labrador and Baffin Current. Our findings provide new insights into the response of sea ice to increased meltwater discharge as well as shifts in atmospheric and oceanic circulation. Article in Journal/Newspaper Baffin Greenland Hudson Bay Ice cap Ice Sheet Labrador Sea Sea ice MACAU: Open Access Repository of Kiel University Hudson Bay Greenland Hudson Labrador Shelf ENVELOPE(-58.000,-58.000,56.000,56.000) Paleoceanography and Paleoclimatology 38 9 |
institution |
Open Polar |
collection |
MACAU: Open Access Repository of Kiel University |
op_collection_id |
ftunivkiel |
language |
English |
topic |
article ScholarlyArticle Published Version ddc:550 sea ice Atlantic Ocean IP25 8.2 event |
spellingShingle |
article ScholarlyArticle Published Version ddc:550 sea ice Atlantic Ocean IP25 8.2 event Kolling, Henriette Marie Schneider, Ralph Gross, Felix Hamann, Christian Kienast, Markus Kienast, Stephanie Doering, Kristin Fahl, Kirsten Stein, Ruediger Biomarker records of environmental shifts on the Labrador Shelf during the Holocene |
topic_facet |
article ScholarlyArticle Published Version ddc:550 sea ice Atlantic Ocean IP25 8.2 event |
description |
The ultimate demise of the Laurentide Ice Sheet (LIS) and the preceding and succeeding oceanographic changes along the western Labrador Sea offer insights critically important to improve climate predictions of expected future climate warming and further melting of the Greenland ice cap. However, while the final disappearance of the LIS during the Holocene is rather well constrained, the response of sea ice during the resulting meltwater events is not fully understood. Here, we present reconstructions of paleoceanographic changes over the past 9.3 Kyr BP on the northwestern Labrador Shelf, with a special focus on the interaction between the final meltwater event around 8.2 Kyr BP and sea ice and phytoplankton productivity (e.g., IP25, HBI III (Z), brassicasterol, dinosterol, biogenic opal, total organic carbon). Our records indicate low sea-ice cover and high phytoplankton productivity on the Labrador Shelf prior to 8.9 Kyr BP, sea-ice formation was favored by decreased surface salinities due to the meltwater events from Lake Agassiz-Ojibway and the Hudson Bay Ice Saddle from 8.55 Kyr BP onwards. For the past ca. 7.5 Kyr BP sea ice is mainly transported to the study area by local ocean currents such as the inner Labrador and Baffin Current. Our findings provide new insights into the response of sea ice to increased meltwater discharge as well as shifts in atmospheric and oceanic circulation. |
format |
Article in Journal/Newspaper |
author |
Kolling, Henriette Marie Schneider, Ralph Gross, Felix Hamann, Christian Kienast, Markus Kienast, Stephanie Doering, Kristin Fahl, Kirsten Stein, Ruediger |
author_facet |
Kolling, Henriette Marie Schneider, Ralph Gross, Felix Hamann, Christian Kienast, Markus Kienast, Stephanie Doering, Kristin Fahl, Kirsten Stein, Ruediger |
author_sort |
Kolling, Henriette Marie |
title |
Biomarker records of environmental shifts on the Labrador Shelf during the Holocene |
title_short |
Biomarker records of environmental shifts on the Labrador Shelf during the Holocene |
title_full |
Biomarker records of environmental shifts on the Labrador Shelf during the Holocene |
title_fullStr |
Biomarker records of environmental shifts on the Labrador Shelf during the Holocene |
title_full_unstemmed |
Biomarker records of environmental shifts on the Labrador Shelf during the Holocene |
title_sort |
biomarker records of environmental shifts on the labrador shelf during the holocene |
publishDate |
2023 |
url |
https://doi.org/10.1029/2022PA004578 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00830-3 https://macau.uni-kiel.de/receive/macau_mods_00004159 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00005319/Paleoceanog%20and%20Paleoclimatol%20-%202023%20-%20Kolling%20-%20Biomarker%20Records%20of%20Environmental%20Shifts%20on%20the%20Labrador%20Shelf%20During%20the.pdf |
long_lat |
ENVELOPE(-58.000,-58.000,56.000,56.000) |
geographic |
Hudson Bay Greenland Hudson Labrador Shelf |
geographic_facet |
Hudson Bay Greenland Hudson Labrador Shelf |
genre |
Baffin Greenland Hudson Bay Ice cap Ice Sheet Labrador Sea Sea ice |
genre_facet |
Baffin Greenland Hudson Bay Ice cap Ice Sheet Labrador Sea Sea ice |
op_relation |
Paleoceanography and Paleoclimatology -- 2572-4525 -- 2572-4525 https://doi.org/10.1029/2022PA004578 https://nbn-resolving.org/urn:nbn:de:gbv:8:3-2023-00830-3 https://macau.uni-kiel.de/receive/macau_mods_00004159 https://macau.uni-kiel.de/servlets/MCRFileNodeServlet/macau_derivate_00005319/Paleoceanog%20and%20Paleoclimatol%20-%202023%20-%20Kolling%20-%20Biomarker%20Records%20of%20Environmental%20Shifts%20on%20the%20Labrador%20Shelf%20During%20the.pdf |
op_rights |
https://creativecommons.org/licenses/by-nc-nd/4.0/ info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2022PA004578 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
38 |
container_issue |
9 |
_version_ |
1802642606069383168 |