Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies
Dramatic changes occur in the sea-surface characteristics (i.e., temperature and salinity) and freshwater input due to the interaction of cold and fresh Labrador Current and warm and salty North Atlantic Current (NAC) on the southeast Grand Banks. As a result, the biological productivity and seasona...
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MDPI AG
2021
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Online Access: | https://doi.org/10.3390/app11083343 https://doaj.org/article/75824698a4514284b034769b6b05c279 |
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ftdoajarticles:oai:doaj.org/article:75824698a4514284b034769b6b05c279 2023-05-15T15:19:09+02:00 Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies Harunur Rashid Qian Qian Lu Min Zeng Yang Wang Zhao Wu Zhang 2021-04-01T00:00:00Z https://doi.org/10.3390/app11083343 https://doaj.org/article/75824698a4514284b034769b6b05c279 EN eng MDPI AG https://www.mdpi.com/2076-3417/11/8/3343 https://doaj.org/toc/2076-3417 doi:10.3390/app11083343 2076-3417 https://doaj.org/article/75824698a4514284b034769b6b05c279 Applied Sciences, Vol 11, Iss 3343, p 3343 (2021) Heinrich events foraminiferal assemblages Labrador Current marine isotope stages Newfoundland Basin Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 article 2021 ftdoajarticles https://doi.org/10.3390/app11083343 2022-12-31T09:26:36Z Dramatic changes occur in the sea-surface characteristics (i.e., temperature and salinity) and freshwater input due to the interaction of cold and fresh Labrador Current and warm and salty North Atlantic Current (NAC) on the southeast Grand Banks. As a result, the biological productivity and seasonal stratification of the upper water masses are intensified. Such changes must have been more dramatic during the glacial times due to the penetration of the Polar and Arctic fronts and southward migration of the Gulf Stream/NAC. However, the extent to which such changes impacted the sea-surface characteristics in the Newfoundland Basin is poorly known. We report changes in the sea-surface characteristics using a piston core (Hu9007-08) collected from the Milne seamount during the last 145,000 years. Heinrich layers H1, H2, H4, and H5 and H11 within the MIS3 and at the penultimate deglaciation were identified by the ice-rafted detritus (IRD) and Neogloboquadrina pachyderma peaks and lighter oxygen isotopes. Rapid turnover by the foraminiferal species with distinct depth habitats and ecological niches in the mixed-layer and thermocline suggests an interplay between the polar and subpolar water masses during the Heinrich and non-Heinrich periods. Only two North Atlantic-wide cooling events, C24 and C21, in which the latter event linked to the minor IRD event during the marine isotope stage (MIS) 5 in Hu90-08, compared to the eight events in the eastern subpolar gyre (e.g., ODP site 984). Millennial-scale N. pachyderma variability in the western subpolar gyre appears to be absent in the eastern subpolar gyre during the MIS3 suggesting the occasional presence of salty and warm water by the NAC inflow, implying a different climate state between the western and eastern subpolar gyre. Although T. quinqueloba data are fragmentary, there are differences between the western and eastern subpolar gyre in addition to the differences within the western subpolar gyre during MIS5 that might imply a variable influence by the subpolar ... Article in Journal/Newspaper Arctic Foraminifera* Neogloboquadrina pachyderma Newfoundland north atlantic current North Atlantic Northwest Atlantic Directory of Open Access Journals: DOAJ Articles Arctic Newfoundland Applied Sciences 11 8 3343 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Heinrich events foraminiferal assemblages Labrador Current marine isotope stages Newfoundland Basin Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
spellingShingle |
Heinrich events foraminiferal assemblages Labrador Current marine isotope stages Newfoundland Basin Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Harunur Rashid Qian Qian Lu Min Zeng Yang Wang Zhao Wu Zhang Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies |
topic_facet |
Heinrich events foraminiferal assemblages Labrador Current marine isotope stages Newfoundland Basin Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 |
description |
Dramatic changes occur in the sea-surface characteristics (i.e., temperature and salinity) and freshwater input due to the interaction of cold and fresh Labrador Current and warm and salty North Atlantic Current (NAC) on the southeast Grand Banks. As a result, the biological productivity and seasonal stratification of the upper water masses are intensified. Such changes must have been more dramatic during the glacial times due to the penetration of the Polar and Arctic fronts and southward migration of the Gulf Stream/NAC. However, the extent to which such changes impacted the sea-surface characteristics in the Newfoundland Basin is poorly known. We report changes in the sea-surface characteristics using a piston core (Hu9007-08) collected from the Milne seamount during the last 145,000 years. Heinrich layers H1, H2, H4, and H5 and H11 within the MIS3 and at the penultimate deglaciation were identified by the ice-rafted detritus (IRD) and Neogloboquadrina pachyderma peaks and lighter oxygen isotopes. Rapid turnover by the foraminiferal species with distinct depth habitats and ecological niches in the mixed-layer and thermocline suggests an interplay between the polar and subpolar water masses during the Heinrich and non-Heinrich periods. Only two North Atlantic-wide cooling events, C24 and C21, in which the latter event linked to the minor IRD event during the marine isotope stage (MIS) 5 in Hu90-08, compared to the eight events in the eastern subpolar gyre (e.g., ODP site 984). Millennial-scale N. pachyderma variability in the western subpolar gyre appears to be absent in the eastern subpolar gyre during the MIS3 suggesting the occasional presence of salty and warm water by the NAC inflow, implying a different climate state between the western and eastern subpolar gyre. Although T. quinqueloba data are fragmentary, there are differences between the western and eastern subpolar gyre in addition to the differences within the western subpolar gyre during MIS5 that might imply a variable influence by the subpolar ... |
format |
Article in Journal/Newspaper |
author |
Harunur Rashid Qian Qian Lu Min Zeng Yang Wang Zhao Wu Zhang |
author_facet |
Harunur Rashid Qian Qian Lu Min Zeng Yang Wang Zhao Wu Zhang |
author_sort |
Harunur Rashid |
title |
Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies |
title_short |
Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies |
title_full |
Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies |
title_fullStr |
Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies |
title_full_unstemmed |
Sea-Surface Characteristics of the Newfoundland Basin of the Northwest Atlantic Ocean during the Last 145,000 Years: A Study Based on the Sedimentological and Paleontological Proxies |
title_sort |
sea-surface characteristics of the newfoundland basin of the northwest atlantic ocean during the last 145,000 years: a study based on the sedimentological and paleontological proxies |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doi.org/10.3390/app11083343 https://doaj.org/article/75824698a4514284b034769b6b05c279 |
geographic |
Arctic Newfoundland |
geographic_facet |
Arctic Newfoundland |
genre |
Arctic Foraminifera* Neogloboquadrina pachyderma Newfoundland north atlantic current North Atlantic Northwest Atlantic |
genre_facet |
Arctic Foraminifera* Neogloboquadrina pachyderma Newfoundland north atlantic current North Atlantic Northwest Atlantic |
op_source |
Applied Sciences, Vol 11, Iss 3343, p 3343 (2021) |
op_relation |
https://www.mdpi.com/2076-3417/11/8/3343 https://doaj.org/toc/2076-3417 doi:10.3390/app11083343 2076-3417 https://doaj.org/article/75824698a4514284b034769b6b05c279 |
op_doi |
https://doi.org/10.3390/app11083343 |
container_title |
Applied Sciences |
container_volume |
11 |
container_issue |
8 |
container_start_page |
3343 |
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1766349337554583552 |