Physical drivers of biogeochemical variability in the Polar Front Meander
The Southern Ocean plays a vital role in global ocean circulation, and the Polar Front (PF) isone of its most important physical features. The PF meander south of Tasmania, around 153E, 55S, is a verydynamic region which spawns mesoscale eddies, and influences local biogeochemistry and sea-air inter...
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ftunivtasecite:oai:ecite.utas.edu.au:150660 2023-05-15T18:25:36+02:00 Physical drivers of biogeochemical variability in the Polar Front Meander Yang, X Strutton, PG Cyriac, A Phillips, HE Pittman, NA Vives, CR 2022 application/pdf https://doi.org/10.1029/2021JC017863 http://ecite.utas.edu.au/150660 en eng Wiley-Blackwell Publishing Inc. http://ecite.utas.edu.au/150660/1/150660 - Physical drivers of biogeochemical variability in the Polar Front.pdf http://dx.doi.org/10.1029/2021JC017863 http://purl.org/au-research/grants/arc/DP170102162 Yang, X and Strutton, PG and Cyriac, A and Phillips, HE and Pittman, NA and Vives, CR, Physical drivers of biogeochemical variability in the Polar Front Meander, Journal of Geophysical Research: Oceans, 127, (6) Article e2021JC017863. ISSN 2169-9275 (2022) [Refereed Article] http://ecite.utas.edu.au/150660 Earth Sciences Oceanography Biological oceanography Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1029/2021JC017863 2022-11-07T23:17:21Z The Southern Ocean plays a vital role in global ocean circulation, and the Polar Front (PF) isone of its most important physical features. The PF meander south of Tasmania, around 153E, 55S, is a verydynamic region which spawns mesoscale eddies, and influences local biogeochemistry and sea-air interaction.By using voyage and ancillary data, we investigated the unusually strong spring bloom in the vicinity of the PFmeander in 2018. We infer that the upwelling of deep water at the front and in eddies, brings macronutrientsand dissolved iron (dFe) to the surface. Chlorophyll concentration peaked at over 0.6 mg m −3 , which isanomalously high for this area. With reduced iron limitation, the physiological characteristics of phytoplanktonin the northern, downstream part of the study area also changed. The photochemical efficiency was improvedand released this area from its usual high-nutrient low-chlorophyll (HNLC) status. This was mainly indicatedby the increase in the dawn Fv/Fm maximum (indictor of photochemical efficiency) from 0.2 to over 0.5.With the biomass increase and healthier community status, we observed consumption of surface dissolvedinorganic carbon and increased particulate organic carbon production to about 40 μmol L −1 , forming a weaklocal carbon sink. Through the investigation of multiple years, a weak positive correlation between mixed layerdepth shoaling and phytoplankton growth was found, but there was significant interannual variability in thisrelationship, likely caused by variable eddy conditions and dFe delivery. Article in Journal/Newspaper Southern Ocean eCite UTAS (University of Tasmania) Southern Ocean Journal of Geophysical Research: Oceans 127 6 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Biological oceanography |
spellingShingle |
Earth Sciences Oceanography Biological oceanography Yang, X Strutton, PG Cyriac, A Phillips, HE Pittman, NA Vives, CR Physical drivers of biogeochemical variability in the Polar Front Meander |
topic_facet |
Earth Sciences Oceanography Biological oceanography |
description |
The Southern Ocean plays a vital role in global ocean circulation, and the Polar Front (PF) isone of its most important physical features. The PF meander south of Tasmania, around 153E, 55S, is a verydynamic region which spawns mesoscale eddies, and influences local biogeochemistry and sea-air interaction.By using voyage and ancillary data, we investigated the unusually strong spring bloom in the vicinity of the PFmeander in 2018. We infer that the upwelling of deep water at the front and in eddies, brings macronutrientsand dissolved iron (dFe) to the surface. Chlorophyll concentration peaked at over 0.6 mg m −3 , which isanomalously high for this area. With reduced iron limitation, the physiological characteristics of phytoplanktonin the northern, downstream part of the study area also changed. The photochemical efficiency was improvedand released this area from its usual high-nutrient low-chlorophyll (HNLC) status. This was mainly indicatedby the increase in the dawn Fv/Fm maximum (indictor of photochemical efficiency) from 0.2 to over 0.5.With the biomass increase and healthier community status, we observed consumption of surface dissolvedinorganic carbon and increased particulate organic carbon production to about 40 μmol L −1 , forming a weaklocal carbon sink. Through the investigation of multiple years, a weak positive correlation between mixed layerdepth shoaling and phytoplankton growth was found, but there was significant interannual variability in thisrelationship, likely caused by variable eddy conditions and dFe delivery. |
format |
Article in Journal/Newspaper |
author |
Yang, X Strutton, PG Cyriac, A Phillips, HE Pittman, NA Vives, CR |
author_facet |
Yang, X Strutton, PG Cyriac, A Phillips, HE Pittman, NA Vives, CR |
author_sort |
Yang, X |
title |
Physical drivers of biogeochemical variability in the Polar Front Meander |
title_short |
Physical drivers of biogeochemical variability in the Polar Front Meander |
title_full |
Physical drivers of biogeochemical variability in the Polar Front Meander |
title_fullStr |
Physical drivers of biogeochemical variability in the Polar Front Meander |
title_full_unstemmed |
Physical drivers of biogeochemical variability in the Polar Front Meander |
title_sort |
physical drivers of biogeochemical variability in the polar front meander |
publisher |
Wiley-Blackwell Publishing Inc. |
publishDate |
2022 |
url |
https://doi.org/10.1029/2021JC017863 http://ecite.utas.edu.au/150660 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://ecite.utas.edu.au/150660/1/150660 - Physical drivers of biogeochemical variability in the Polar Front.pdf http://dx.doi.org/10.1029/2021JC017863 http://purl.org/au-research/grants/arc/DP170102162 Yang, X and Strutton, PG and Cyriac, A and Phillips, HE and Pittman, NA and Vives, CR, Physical drivers of biogeochemical variability in the Polar Front Meander, Journal of Geophysical Research: Oceans, 127, (6) Article e2021JC017863. ISSN 2169-9275 (2022) [Refereed Article] http://ecite.utas.edu.au/150660 |
op_doi |
https://doi.org/10.1029/2021JC017863 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
127 |
container_issue |
6 |
_version_ |
1766207158566780928 |