Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia
The Sub Antarctic Zone (SAZ) is part of the high nutrient low chlorophyll region of the Southern Ocean where low iron availability limits phytoplankton productivity. In the Tasman Sea, the SAZ displays a unique and large zonal gradient in the surface chlorophyll concentrations. In situ measurements...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Pergamon-Elsevier Science Ltd
2011
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.dsr2.2011.06.001 http://ecite.utas.edu.au/76882 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:76882 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:76882 2023-05-15T14:02:30+02:00 Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia Mongin, M Matear, R Chamberlain, M 2011 application/pdf https://doi.org/10.1016/j.dsr2.2011.06.001 http://ecite.utas.edu.au/76882 en eng Pergamon-Elsevier Science Ltd http://ecite.utas.edu.au/76882/1/Mongin_2011_Deep-Sea-Research-Part-II-Topical-Studies-in-Oceanography.pdf http://dx.doi.org/10.1016/j.dsr2.2011.06.001 Mongin, M and Matear, R and Chamberlain, M, Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia, Deep-Sea Research. Part 2: Topical Studies in Oceanography, 58, (21-22) pp. 2126-2134. ISSN 0967-0645 (2011) [Refereed Article] http://ecite.utas.edu.au/76882 Earth Sciences Oceanography Chemical Oceanography Refereed Article PeerReviewed 2011 ftunivtasecite https://doi.org/10.1016/j.dsr2.2011.06.001 2019-12-13T21:43:10Z The Sub Antarctic Zone (SAZ) is part of the high nutrient low chlorophyll region of the Southern Ocean where low iron availability limits phytoplankton productivity. In the Tasman Sea, the SAZ displays a unique and large zonal gradient in the surface chlorophyll concentrations. In situ measurements show higher dissolved iron in the east than in the west which could explain the zonal chlorophyll gradient. To assess and quantify the major sources of iron in this region, we use an eddy-resolving model to simulate the dissolved Fe distribution arising from both the shelf and the dust supply of iron. The simulation showed that dissolved Fe from the shelf is only transported eastward to about 155E and the shelf source of dissolved iron is unable to supply iron to the entire Tasman Sea SAZ region even when we assume that there no iron losses. The simulation with the atmospheric source of iron showed that through a combination of atmospheric transport and ocean transport, enough dissolved Fe can be supplied to the entire Tasman Sea SAZ region to relieve iron limitation. From the model simulations, we conclude that atmospheric iron supply is essential to generating the observed gradient of the chlorophyll in the SAZ region of the Tasman Sea. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean Deep Sea Research Part II: Topical Studies in Oceanography 58 21-22 2126 2134 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Chemical Oceanography |
spellingShingle |
Earth Sciences Oceanography Chemical Oceanography Mongin, M Matear, R Chamberlain, M Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia |
topic_facet |
Earth Sciences Oceanography Chemical Oceanography |
description |
The Sub Antarctic Zone (SAZ) is part of the high nutrient low chlorophyll region of the Southern Ocean where low iron availability limits phytoplankton productivity. In the Tasman Sea, the SAZ displays a unique and large zonal gradient in the surface chlorophyll concentrations. In situ measurements show higher dissolved iron in the east than in the west which could explain the zonal chlorophyll gradient. To assess and quantify the major sources of iron in this region, we use an eddy-resolving model to simulate the dissolved Fe distribution arising from both the shelf and the dust supply of iron. The simulation showed that dissolved Fe from the shelf is only transported eastward to about 155E and the shelf source of dissolved iron is unable to supply iron to the entire Tasman Sea SAZ region even when we assume that there no iron losses. The simulation with the atmospheric source of iron showed that through a combination of atmospheric transport and ocean transport, enough dissolved Fe can be supplied to the entire Tasman Sea SAZ region to relieve iron limitation. From the model simulations, we conclude that atmospheric iron supply is essential to generating the observed gradient of the chlorophyll in the SAZ region of the Tasman Sea. |
format |
Article in Journal/Newspaper |
author |
Mongin, M Matear, R Chamberlain, M |
author_facet |
Mongin, M Matear, R Chamberlain, M |
author_sort |
Mongin, M |
title |
Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia |
title_short |
Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia |
title_full |
Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia |
title_fullStr |
Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia |
title_full_unstemmed |
Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia |
title_sort |
simulation of chlorophyll and iron supplies in the sub antarctic zone south of australia |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2011 |
url |
https://doi.org/10.1016/j.dsr2.2011.06.001 http://ecite.utas.edu.au/76882 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
http://ecite.utas.edu.au/76882/1/Mongin_2011_Deep-Sea-Research-Part-II-Topical-Studies-in-Oceanography.pdf http://dx.doi.org/10.1016/j.dsr2.2011.06.001 Mongin, M and Matear, R and Chamberlain, M, Simulation of chlorophyll and iron supplies in the Sub Antarctic Zone South of Australia, Deep-Sea Research. Part 2: Topical Studies in Oceanography, 58, (21-22) pp. 2126-2134. ISSN 0967-0645 (2011) [Refereed Article] http://ecite.utas.edu.au/76882 |
op_doi |
https://doi.org/10.1016/j.dsr2.2011.06.001 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
58 |
container_issue |
21-22 |
container_start_page |
2126 |
op_container_end_page |
2134 |
_version_ |
1766272791048355840 |