Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas
An important yet still not well documented aspect of recent changes in the Arctic Ocean is associated with the advection of anomalous sub-Arctic Atlantic- and Pacific-origin waters and biota into the polar basins, a process which we refer to as borealization. Using a 37-year archive of observations...
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2020
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Online Access: | https://doi.org/10.3389/fmars.2020.00491 https://doaj.org/article/8e21d6307a6f41a297b7899934c132b9 |
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ftdoajarticles:oai:doaj.org/article:8e21d6307a6f41a297b7899934c132b9 2023-05-15T14:33:03+02:00 Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas Igor V. Polyakov Matthew B. Alkire Bodil A. Bluhm Kristina A. Brown Eddy C. Carmack Melissa Chierici Seth L. Danielson Ingrid Ellingsen Elizaveta A. Ershova Katarina Gårdfeldt Randi B. Ingvaldsen Andrey V. Pnyushkov Dag Slagstad Paul Wassmann 2020-07-01T00:00:00Z https://doi.org/10.3389/fmars.2020.00491 https://doaj.org/article/8e21d6307a6f41a297b7899934c132b9 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2020.00491/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00491 https://doaj.org/article/8e21d6307a6f41a297b7899934c132b9 Frontiers in Marine Science, Vol 7 (2020) Arctic ocean climate change atlantification and pacification multidisciplinary changes future projections Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.00491 2022-12-31T01:16:03Z An important yet still not well documented aspect of recent changes in the Arctic Ocean is associated with the advection of anomalous sub-Arctic Atlantic- and Pacific-origin waters and biota into the polar basins, a process which we refer to as borealization. Using a 37-year archive of observations (1981–2017) we demonstrate dramatically contrasting regional responses to atlantification (that part of borealization related to progression of anomalies from the Atlantic sector of sub-Arctic seas into the Arctic Ocean) and pacification (the counterpart of atlantification associated with influx of anomalous Pacific waters). Particularly, we show strong salinification of the upper Eurasian Basin since 2000, with attendant reductions in stratification, and potentially altered nutrient fluxes and primary production. These changes are closely related to upstream conditions. In contrast, pacification is strongly manifested in the Amerasian Basin by the anomalous influx of Pacific waters, creating conditions favorable for increased heat and freshwater content in the Beaufort Gyre halocline and expansion of Pacific species into the Arctic interior. Here, changes in the upper (overlying) layers are driven by local Arctic atmospheric processes resulting in stronger wind/ice/ocean coupling, increased convergence within the Beaufort Gyre, a thickening of the fresh surface layer, and a deepening of the nutricline and deep chlorophyll maximum. Thus, a divergent (Eurasian Basin) gyre responds altogether differently than does a convergent (Amerasian Basin) gyre to climate forcing. Available geochemical data indicate a general decrease in nutrient concentrations Arctic-wide, except in the northern portions of the Makarov and Amundsen Basins and northern Chukchi Sea and Canada Basin. Thus, changes in the circulation pathways of specific water masses, as well as the utilization of nutrients in upstream regions, may control the availability of nutrients in the Arctic Ocean. Model-based evaluation of the trajectory of the Arctic climate ... Article in Journal/Newspaper Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Climate change Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Chukchi Sea Canada Pacific Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic ocean climate change atlantification and pacification multidisciplinary changes future projections Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
Arctic ocean climate change atlantification and pacification multidisciplinary changes future projections Science Q General. Including nature conservation geographical distribution QH1-199.5 Igor V. Polyakov Matthew B. Alkire Bodil A. Bluhm Kristina A. Brown Eddy C. Carmack Melissa Chierici Seth L. Danielson Ingrid Ellingsen Elizaveta A. Ershova Katarina Gårdfeldt Randi B. Ingvaldsen Andrey V. Pnyushkov Dag Slagstad Paul Wassmann Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas |
topic_facet |
Arctic ocean climate change atlantification and pacification multidisciplinary changes future projections Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
An important yet still not well documented aspect of recent changes in the Arctic Ocean is associated with the advection of anomalous sub-Arctic Atlantic- and Pacific-origin waters and biota into the polar basins, a process which we refer to as borealization. Using a 37-year archive of observations (1981–2017) we demonstrate dramatically contrasting regional responses to atlantification (that part of borealization related to progression of anomalies from the Atlantic sector of sub-Arctic seas into the Arctic Ocean) and pacification (the counterpart of atlantification associated with influx of anomalous Pacific waters). Particularly, we show strong salinification of the upper Eurasian Basin since 2000, with attendant reductions in stratification, and potentially altered nutrient fluxes and primary production. These changes are closely related to upstream conditions. In contrast, pacification is strongly manifested in the Amerasian Basin by the anomalous influx of Pacific waters, creating conditions favorable for increased heat and freshwater content in the Beaufort Gyre halocline and expansion of Pacific species into the Arctic interior. Here, changes in the upper (overlying) layers are driven by local Arctic atmospheric processes resulting in stronger wind/ice/ocean coupling, increased convergence within the Beaufort Gyre, a thickening of the fresh surface layer, and a deepening of the nutricline and deep chlorophyll maximum. Thus, a divergent (Eurasian Basin) gyre responds altogether differently than does a convergent (Amerasian Basin) gyre to climate forcing. Available geochemical data indicate a general decrease in nutrient concentrations Arctic-wide, except in the northern portions of the Makarov and Amundsen Basins and northern Chukchi Sea and Canada Basin. Thus, changes in the circulation pathways of specific water masses, as well as the utilization of nutrients in upstream regions, may control the availability of nutrients in the Arctic Ocean. Model-based evaluation of the trajectory of the Arctic climate ... |
format |
Article in Journal/Newspaper |
author |
Igor V. Polyakov Matthew B. Alkire Bodil A. Bluhm Kristina A. Brown Eddy C. Carmack Melissa Chierici Seth L. Danielson Ingrid Ellingsen Elizaveta A. Ershova Katarina Gårdfeldt Randi B. Ingvaldsen Andrey V. Pnyushkov Dag Slagstad Paul Wassmann |
author_facet |
Igor V. Polyakov Matthew B. Alkire Bodil A. Bluhm Kristina A. Brown Eddy C. Carmack Melissa Chierici Seth L. Danielson Ingrid Ellingsen Elizaveta A. Ershova Katarina Gårdfeldt Randi B. Ingvaldsen Andrey V. Pnyushkov Dag Slagstad Paul Wassmann |
author_sort |
Igor V. Polyakov |
title |
Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas |
title_short |
Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas |
title_full |
Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas |
title_fullStr |
Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas |
title_full_unstemmed |
Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas |
title_sort |
borealization of the arctic ocean in response to anomalous advection from sub-arctic seas |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00491 https://doaj.org/article/8e21d6307a6f41a297b7899934c132b9 |
geographic |
Arctic Arctic Ocean Chukchi Sea Canada Pacific |
geographic_facet |
Arctic Arctic Ocean Chukchi Sea Canada Pacific |
genre |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Climate change |
genre_facet |
Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Climate change |
op_source |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2020.00491/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00491 https://doaj.org/article/8e21d6307a6f41a297b7899934c132b9 |
op_doi |
https://doi.org/10.3389/fmars.2020.00491 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766306354174099456 |