Response of biological productivity to North Atlantic marine front migration during the Holocene
Marine fronts delineate the boundary between distinct water masses and, through the advection of nutrients, are important facilitators of regional productivity and biodiversity. As the modern climate continues to change, the migration of frontal zones is evident, but a lack of information about thei...
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fttriple:oai:gotriple.eu:oai:doaj.org/article:da77deeb2210472c91c3f8abcdebaffa 2023-05-15T14:51:08+02:00 Response of biological productivity to North Atlantic marine front migration during the Holocene D. J. Harning A. E. Jennings D. Köseoğlu S. T. Belt Á. Geirsdóttir J. Sepúlveda 2021-02-01 https://doi.org/10.5194/cp-17-379-2021 https://cp.copernicus.org/articles/17/379/2021/cp-17-379-2021.pdf https://doaj.org/article/da77deeb2210472c91c3f8abcdebaffa en eng Copernicus Publications doi:10.5194/cp-17-379-2021 1814-9324 1814-9332 https://cp.copernicus.org/articles/17/379/2021/cp-17-379-2021.pdf https://doaj.org/article/da77deeb2210472c91c3f8abcdebaffa undefined Climate of the Past, Vol 17, Pp 379-396 (2021) envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.5194/cp-17-379-2021 2023-01-22T17:51:00Z Marine fronts delineate the boundary between distinct water masses and, through the advection of nutrients, are important facilitators of regional productivity and biodiversity. As the modern climate continues to change, the migration of frontal zones is evident, but a lack of information about their status prior to instrumental records hinders future projections. Here, we combine data from lipid biomarkers (archaeal isoprenoid glycerol dibiphytanyl glycerol tetraethers and algal highly branched isoprenoids) with planktic and benthic foraminifera assemblages to detail the biological response of the marine Arctic and polar front migrations on the North Iceland Shelf (NIS) over the last 8 kyr. This multi-proxy approach enables us to quantify the thermal structure relating to Arctic and polar front migration and test how this influences the corresponding changes in local pelagic productivity. Our data show that following an interval of Atlantic water influence, the Arctic front and its associated high pelagic productivity migrated southeastward to the NIS by ∼6.1 ka. Following a subsequent trend in regional cooling, Polar Water from the East Greenland Current and the associated polar front spread onto the NIS by ∼3.8 ka, greatly diminishing local algal productivity through the Little Ice Age. Within the last century, the Arctic and polar fronts have moved northward back to their current positions relative to the NIS and helped stimulate the productivity that partially supports Iceland's economy. Our Holocene records from the NIS provide analogues for how the current frontal configuration and the productivity that it supports may change as global temperatures continue to rise. Article in Journal/Newspaper Arctic East Greenland east greenland current Foraminifera* Greenland Iceland North Atlantic Unknown Arctic Greenland Climate of the Past 17 1 379 396 |
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envir geo D. J. Harning A. E. Jennings D. Köseoğlu S. T. Belt Á. Geirsdóttir J. Sepúlveda Response of biological productivity to North Atlantic marine front migration during the Holocene |
topic_facet |
envir geo |
description |
Marine fronts delineate the boundary between distinct water masses and, through the advection of nutrients, are important facilitators of regional productivity and biodiversity. As the modern climate continues to change, the migration of frontal zones is evident, but a lack of information about their status prior to instrumental records hinders future projections. Here, we combine data from lipid biomarkers (archaeal isoprenoid glycerol dibiphytanyl glycerol tetraethers and algal highly branched isoprenoids) with planktic and benthic foraminifera assemblages to detail the biological response of the marine Arctic and polar front migrations on the North Iceland Shelf (NIS) over the last 8 kyr. This multi-proxy approach enables us to quantify the thermal structure relating to Arctic and polar front migration and test how this influences the corresponding changes in local pelagic productivity. Our data show that following an interval of Atlantic water influence, the Arctic front and its associated high pelagic productivity migrated southeastward to the NIS by ∼6.1 ka. Following a subsequent trend in regional cooling, Polar Water from the East Greenland Current and the associated polar front spread onto the NIS by ∼3.8 ka, greatly diminishing local algal productivity through the Little Ice Age. Within the last century, the Arctic and polar fronts have moved northward back to their current positions relative to the NIS and helped stimulate the productivity that partially supports Iceland's economy. Our Holocene records from the NIS provide analogues for how the current frontal configuration and the productivity that it supports may change as global temperatures continue to rise. |
format |
Article in Journal/Newspaper |
author |
D. J. Harning A. E. Jennings D. Köseoğlu S. T. Belt Á. Geirsdóttir J. Sepúlveda |
author_facet |
D. J. Harning A. E. Jennings D. Köseoğlu S. T. Belt Á. Geirsdóttir J. Sepúlveda |
author_sort |
D. J. Harning |
title |
Response of biological productivity to North Atlantic marine front migration during the Holocene |
title_short |
Response of biological productivity to North Atlantic marine front migration during the Holocene |
title_full |
Response of biological productivity to North Atlantic marine front migration during the Holocene |
title_fullStr |
Response of biological productivity to North Atlantic marine front migration during the Holocene |
title_full_unstemmed |
Response of biological productivity to North Atlantic marine front migration during the Holocene |
title_sort |
response of biological productivity to north atlantic marine front migration during the holocene |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/cp-17-379-2021 https://cp.copernicus.org/articles/17/379/2021/cp-17-379-2021.pdf https://doaj.org/article/da77deeb2210472c91c3f8abcdebaffa |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic East Greenland east greenland current Foraminifera* Greenland Iceland North Atlantic |
genre_facet |
Arctic East Greenland east greenland current Foraminifera* Greenland Iceland North Atlantic |
op_source |
Climate of the Past, Vol 17, Pp 379-396 (2021) |
op_relation |
doi:10.5194/cp-17-379-2021 1814-9324 1814-9332 https://cp.copernicus.org/articles/17/379/2021/cp-17-379-2021.pdf https://doaj.org/article/da77deeb2210472c91c3f8abcdebaffa |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-17-379-2021 |
container_title |
Climate of the Past |
container_volume |
17 |
container_issue |
1 |
container_start_page |
379 |
op_container_end_page |
396 |
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1766322198963814400 |