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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Online Access: | https://doi.org/10.3389/fmars.2020.00491 https://research.chalmers.se/en/publication/77c2216d-0ee4-4876-87ea-36f754d5bb4a |
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ftchalmersuniv:oai:research.chalmers.se:519436 2023-05-15T14:33:03+02:00 Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas Polyakov, Alkire, Matthew B. Bluhm, Bodil A. Brown, Kristina A. Carmack, Eddy C. Chierici, Melissa Danielson, Seth L. Ellingsen, Ingrid Ershova, Elizaveta A. Gårdfeldt, Katarina Ingvaldsen, Randi B. Pnyushkov, Slagstad, Dag Wassmann, Paul 2020 text https://doi.org/10.3389/fmars.2020.00491 https://research.chalmers.se/en/publication/77c2216d-0ee4-4876-87ea-36f754d5bb4a unknown http://dx.doi.org/10.3389/fmars.2020.00491 https://research.chalmers.se/en/publication/77c2216d-0ee4-4876-87ea-36f754d5bb4a Meteorology and Atmospheric Sciences Oceanography Hydrology Water Resources Climate Research multidisciplinary changes climate change Arctic ocean atlantification and pacification future projections 2020 ftchalmersuniv https://doi.org/10.3389/fmars.2020.00491 2022-12-11T07:15:21Z 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 ... Other/Unknown Material Arctic Arctic Ocean canada basin Chukchi Chukchi Sea Climate change Chalmers University of Technology: Chalmers research Arctic Arctic Ocean Canada Chukchi Sea Pacific Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Meteorology and Atmospheric Sciences Oceanography Hydrology Water Resources Climate Research multidisciplinary changes climate change Arctic ocean atlantification and pacification future projections |
spellingShingle |
Meteorology and Atmospheric Sciences Oceanography Hydrology Water Resources Climate Research multidisciplinary changes climate change Arctic ocean atlantification and pacification future projections Polyakov, Alkire, Matthew B. Bluhm, Bodil A. Brown, Kristina A. Carmack, Eddy C. Chierici, Melissa Danielson, Seth L. Ellingsen, Ingrid Ershova, Elizaveta A. Gårdfeldt, Katarina Ingvaldsen, Randi B. Pnyushkov, Slagstad, Dag Wassmann, Paul Borealization of the Arctic Ocean in Response to Anomalous Advection From Sub-Arctic Seas |
topic_facet |
Meteorology and Atmospheric Sciences Oceanography Hydrology Water Resources Climate Research multidisciplinary changes climate change Arctic ocean atlantification and pacification future projections |
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 ... |
author |
Polyakov, Alkire, Matthew B. Bluhm, Bodil A. Brown, Kristina A. Carmack, Eddy C. Chierici, Melissa Danielson, Seth L. Ellingsen, Ingrid Ershova, Elizaveta A. Gårdfeldt, Katarina Ingvaldsen, Randi B. Pnyushkov, Slagstad, Dag Wassmann, Paul |
author_facet |
Polyakov, Alkire, Matthew B. Bluhm, Bodil A. Brown, Kristina A. Carmack, Eddy C. Chierici, Melissa Danielson, Seth L. Ellingsen, Ingrid Ershova, Elizaveta A. Gårdfeldt, Katarina Ingvaldsen, Randi B. Pnyushkov, Slagstad, Dag Wassmann, Paul |
author_sort |
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 |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00491 https://research.chalmers.se/en/publication/77c2216d-0ee4-4876-87ea-36f754d5bb4a |
geographic |
Arctic Arctic Ocean Canada Chukchi Sea Pacific |
geographic_facet |
Arctic Arctic Ocean Canada Chukchi Sea 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_relation |
http://dx.doi.org/10.3389/fmars.2020.00491 https://research.chalmers.se/en/publication/77c2216d-0ee4-4876-87ea-36f754d5bb4a |
op_doi |
https://doi.org/10.3389/fmars.2020.00491 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766306356561707008 |