Iron regulation of North Atlantic eddy phytoplankton productivity
Cyclonic ocean eddies drive upwelling of deep waters enhanced in nutrients, which can elevate phytoplankton productivity. At mid‐latitudes in the North Atlantic, satellite images show enhanced chlorophyll‐a associated with eddies. However, surface macronutrient concentrations are often not fully dep...
Published in: | Geophysical Research Letters |
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Language: | English |
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AGU (American Geophysical Union)
2021
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Online Access: | https://oceanrep.geomar.de/id/eprint/51752/ https://oceanrep.geomar.de/id/eprint/51752/2/2020gl091403-sup-0001-text https://oceanrep.geomar.de/id/eprint/51752/3/2020gl091403-sup-0002-data https://oceanrep.geomar.de/id/eprint/51752/5/2020GL091403%281%29.pdf https://doi.org/10.1029/2020GL091403 |
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ftoceanrep:oai:oceanrep.geomar.de:51752 2024-02-11T10:05:57+01:00 Iron regulation of North Atlantic eddy phytoplankton productivity Browning, Thomas J. Al-Hashem, Ali A. Hopwood, Mark J. Engel, Anja Belkin, Igor M. Wakefield, Ewan D. Fischer, Tim Achterberg, Eric P. 2021-03-28 other text https://oceanrep.geomar.de/id/eprint/51752/ https://oceanrep.geomar.de/id/eprint/51752/2/2020gl091403-sup-0001-text https://oceanrep.geomar.de/id/eprint/51752/3/2020gl091403-sup-0002-data https://oceanrep.geomar.de/id/eprint/51752/5/2020GL091403%281%29.pdf https://doi.org/10.1029/2020GL091403 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/51752/2/2020gl091403-sup-0001-text https://oceanrep.geomar.de/id/eprint/51752/3/2020gl091403-sup-0002-data https://oceanrep.geomar.de/id/eprint/51752/5/2020GL091403%281%29.pdf Browning, T. J. , Al-Hashem, A. A., Hopwood, M. J. , Engel, A. , Belkin, I. M., Wakefield, E. D., Fischer, T. and Achterberg, E. P. (2021) Iron regulation of North Atlantic eddy phytoplankton productivity. Open Access Geophysical Research Letters, 48 (6). e2020GL091403. DOI 10.1029/2020GL091403 <https://doi.org/10.1029/2020GL091403>. doi:10.1029/2020GL091403 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1029/2020GL091403 2024-01-15T00:22:57Z Cyclonic ocean eddies drive upwelling of deep waters enhanced in nutrients, which can elevate phytoplankton productivity. At mid‐latitudes in the North Atlantic, satellite images show enhanced chlorophyll‐a associated with eddies. However, surface macronutrient concentrations are often not fully depleted in this region, implying enhanced macronutrient supply is not the primary control. We conducted high resolution sampling through two mid‐latitude Atlantic eddies in late spring, located 800 and 350 km east of the Newfoundland Grand Banks. Waters outside of both eddies had unused residual macronutrients, low dissolved iron, and iron‐stressed phytoplankton. Inside both eddies, plankton biomass was higher and macronutrient concentrations lower. However, full macronutrient drawdown and an absence of iron stress were only present in the eddy nearer the continental shelf. From these two examples, iron supply and proximity to shelf iron sources appear to be important factors regulating productivity and macronutrient utilization in mid‐latitude North Atlantic cyclonic eddies. Article in Journal/Newspaper Newfoundland North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 48 6 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Cyclonic ocean eddies drive upwelling of deep waters enhanced in nutrients, which can elevate phytoplankton productivity. At mid‐latitudes in the North Atlantic, satellite images show enhanced chlorophyll‐a associated with eddies. However, surface macronutrient concentrations are often not fully depleted in this region, implying enhanced macronutrient supply is not the primary control. We conducted high resolution sampling through two mid‐latitude Atlantic eddies in late spring, located 800 and 350 km east of the Newfoundland Grand Banks. Waters outside of both eddies had unused residual macronutrients, low dissolved iron, and iron‐stressed phytoplankton. Inside both eddies, plankton biomass was higher and macronutrient concentrations lower. However, full macronutrient drawdown and an absence of iron stress were only present in the eddy nearer the continental shelf. From these two examples, iron supply and proximity to shelf iron sources appear to be important factors regulating productivity and macronutrient utilization in mid‐latitude North Atlantic cyclonic eddies. |
format |
Article in Journal/Newspaper |
author |
Browning, Thomas J. Al-Hashem, Ali A. Hopwood, Mark J. Engel, Anja Belkin, Igor M. Wakefield, Ewan D. Fischer, Tim Achterberg, Eric P. |
spellingShingle |
Browning, Thomas J. Al-Hashem, Ali A. Hopwood, Mark J. Engel, Anja Belkin, Igor M. Wakefield, Ewan D. Fischer, Tim Achterberg, Eric P. Iron regulation of North Atlantic eddy phytoplankton productivity |
author_facet |
Browning, Thomas J. Al-Hashem, Ali A. Hopwood, Mark J. Engel, Anja Belkin, Igor M. Wakefield, Ewan D. Fischer, Tim Achterberg, Eric P. |
author_sort |
Browning, Thomas J. |
title |
Iron regulation of North Atlantic eddy phytoplankton productivity |
title_short |
Iron regulation of North Atlantic eddy phytoplankton productivity |
title_full |
Iron regulation of North Atlantic eddy phytoplankton productivity |
title_fullStr |
Iron regulation of North Atlantic eddy phytoplankton productivity |
title_full_unstemmed |
Iron regulation of North Atlantic eddy phytoplankton productivity |
title_sort |
iron regulation of north atlantic eddy phytoplankton productivity |
publisher |
AGU (American Geophysical Union) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/51752/ https://oceanrep.geomar.de/id/eprint/51752/2/2020gl091403-sup-0001-text https://oceanrep.geomar.de/id/eprint/51752/3/2020gl091403-sup-0002-data https://oceanrep.geomar.de/id/eprint/51752/5/2020GL091403%281%29.pdf https://doi.org/10.1029/2020GL091403 |
genre |
Newfoundland North Atlantic |
genre_facet |
Newfoundland North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/51752/2/2020gl091403-sup-0001-text https://oceanrep.geomar.de/id/eprint/51752/3/2020gl091403-sup-0002-data https://oceanrep.geomar.de/id/eprint/51752/5/2020GL091403%281%29.pdf Browning, T. J. , Al-Hashem, A. A., Hopwood, M. J. , Engel, A. , Belkin, I. M., Wakefield, E. D., Fischer, T. and Achterberg, E. P. (2021) Iron regulation of North Atlantic eddy phytoplankton productivity. Open Access Geophysical Research Letters, 48 (6). e2020GL091403. DOI 10.1029/2020GL091403 <https://doi.org/10.1029/2020GL091403>. doi:10.1029/2020GL091403 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020GL091403 |
container_title |
Geophysical Research Letters |
container_volume |
48 |
container_issue |
6 |
_version_ |
1790603303561723904 |