Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production
There is strong evidence of an increase in primary production (PP) in the Arctic Ocean (AO) over the last two decades. Further increases will depend on the interplay between decreasing light limitation for primary producers, as the sea ice extent and thickness decrease, and the availability of nutri...
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Wiley-Blackwell Publishing, Inc.
2021
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ftunivtasmania:oai:eprints.utas.edu.au:37030 2023-05-15T14:26:52+02:00 Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production Duarte, P Meyer, A Moreau, S 2021 application/pdf https://eprints.utas.edu.au/37030/ https://eprints.utas.edu.au/37030/1/145785%20-%20Nutrients%20in%20water%20masses%20in%20the%20Atlantic%20sector%20of%20the%20Arctic%20Ocean.pdf en eng Wiley-Blackwell Publishing, Inc. https://eprints.utas.edu.au/37030/1/145785%20-%20Nutrients%20in%20water%20masses%20in%20the%20Atlantic%20sector%20of%20the%20Arctic%20Ocean.pdf Duarte, P, Meyer, A orcid:0000-0003-0447-795X and Moreau, S 2021 , 'Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production' , JGR Oceans, vol. 126, no. 8 , pp. 1-23 , doi:10.1029/2021JC017413 <http://dx.doi.org/10.1029/2021JC017413>. nutrients Arctic ocean trend mixing primary production climate change climatology Article PeerReviewed 2021 ftunivtasmania https://doi.org/10.1029/2021JC017413 2021-09-06T22:18:14Z There is strong evidence of an increase in primary production (PP) in the Arctic Ocean (AO) over the last two decades. Further increases will depend on the interplay between decreasing light limitation for primary producers, as the sea ice extent and thickness decrease, and the availability of nutrients, which is controlled by, but not limited to, inputs from the Atlantic and the Pacific Oceans. While these inputs are the major nutrient sources to the AO, ocean vertical mixing is required to bring the nutrients into the photic zone. We analyze data collected in the Western Eurasian Basin (WEB) between 1980 and 2016 and characterize the nutrient climatology of the various water masses. We conclude that there were no significant trends in the concentrations of the two macronutrients that typically limit PP in the AO (nitrate and silicic acid, in the case of diatoms), except a decreasing trend for silicic acid in Polar Surface Water (PSW), which is consistent with the reported increase in PP in the AO. We suggest that the Whalers Bay polynya, located in the northwestern corner of Svalbard, may act as a mixing hotspot, creating patches of nutrient replenished PSW. These patches may then be advected to higher latitudes under the ice pack, later boosting PP upon release from light limitation or else, keeping a nutrient reservoir that may be used in a subsequent growth season. It is likely that this remaining nutrient reservoir will decrease as sea ice cover retreats and light limitation alleviates. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Climate change ice pack Sea ice Svalbard University of Tasmania: UTas ePrints Arctic Arctic Ocean Pacific Svalbard Whalers Bay ENVELOPE(69.917,69.917,-49.100,-49.100) Journal of Geophysical Research: Oceans 126 8 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
nutrients Arctic ocean trend mixing primary production climate change climatology |
spellingShingle |
nutrients Arctic ocean trend mixing primary production climate change climatology Duarte, P Meyer, A Moreau, S Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production |
topic_facet |
nutrients Arctic ocean trend mixing primary production climate change climatology |
description |
There is strong evidence of an increase in primary production (PP) in the Arctic Ocean (AO) over the last two decades. Further increases will depend on the interplay between decreasing light limitation for primary producers, as the sea ice extent and thickness decrease, and the availability of nutrients, which is controlled by, but not limited to, inputs from the Atlantic and the Pacific Oceans. While these inputs are the major nutrient sources to the AO, ocean vertical mixing is required to bring the nutrients into the photic zone. We analyze data collected in the Western Eurasian Basin (WEB) between 1980 and 2016 and characterize the nutrient climatology of the various water masses. We conclude that there were no significant trends in the concentrations of the two macronutrients that typically limit PP in the AO (nitrate and silicic acid, in the case of diatoms), except a decreasing trend for silicic acid in Polar Surface Water (PSW), which is consistent with the reported increase in PP in the AO. We suggest that the Whalers Bay polynya, located in the northwestern corner of Svalbard, may act as a mixing hotspot, creating patches of nutrient replenished PSW. These patches may then be advected to higher latitudes under the ice pack, later boosting PP upon release from light limitation or else, keeping a nutrient reservoir that may be used in a subsequent growth season. It is likely that this remaining nutrient reservoir will decrease as sea ice cover retreats and light limitation alleviates. |
format |
Article in Journal/Newspaper |
author |
Duarte, P Meyer, A Moreau, S |
author_facet |
Duarte, P Meyer, A Moreau, S |
author_sort |
Duarte, P |
title |
Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production |
title_short |
Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production |
title_full |
Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production |
title_fullStr |
Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production |
title_full_unstemmed |
Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production |
title_sort |
nutrients in water masses in the atlantic sector of the arctic ocean: temporal trends, mixing and links with primary production |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2021 |
url |
https://eprints.utas.edu.au/37030/ https://eprints.utas.edu.au/37030/1/145785%20-%20Nutrients%20in%20water%20masses%20in%20the%20Atlantic%20sector%20of%20the%20Arctic%20Ocean.pdf |
long_lat |
ENVELOPE(69.917,69.917,-49.100,-49.100) |
geographic |
Arctic Arctic Ocean Pacific Svalbard Whalers Bay |
geographic_facet |
Arctic Arctic Ocean Pacific Svalbard Whalers Bay |
genre |
Arctic Arctic Arctic Ocean Climate change ice pack Sea ice Svalbard |
genre_facet |
Arctic Arctic Arctic Ocean Climate change ice pack Sea ice Svalbard |
op_relation |
https://eprints.utas.edu.au/37030/1/145785%20-%20Nutrients%20in%20water%20masses%20in%20the%20Atlantic%20sector%20of%20the%20Arctic%20Ocean.pdf Duarte, P, Meyer, A orcid:0000-0003-0447-795X and Moreau, S 2021 , 'Nutrients in water masses in the Atlantic sector of the Arctic Ocean: temporal trends, mixing and links with primary production' , JGR Oceans, vol. 126, no. 8 , pp. 1-23 , doi:10.1029/2021JC017413 <http://dx.doi.org/10.1029/2021JC017413>. |
op_doi |
https://doi.org/10.1029/2021JC017413 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
8 |
_version_ |
1766300313831079936 |