Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula
Iron (Fe) is an essential micronutrient for phytoplankton, and is scarce in many regions including the open Southern Ocean. The western Antarctic Peninsula (WAP), an important source region of Fe to the wider Southern Ocean, is also the fastest warming region of the southern hemisphere. The relative...
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ftsouthampton:oai:eprints.soton.ac.uk:378899 2023-07-30T03:58:49+02:00 Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula Annett, Amber L. Skiba, Marta Henley, Sian F. Venables, Hugh J. Meredith, Michael P. Statham, Peter J. Ganeshram, Raja S. 2015-11-20 text https://eprints.soton.ac.uk/378899/ https://eprints.soton.ac.uk/378899/1/Annett_Comparative.pdf https://eprints.soton.ac.uk/378899/2/1-s2.0-S0304420315300025-main.pdf en English eng https://eprints.soton.ac.uk/378899/1/Annett_Comparative.pdf https://eprints.soton.ac.uk/378899/2/1-s2.0-S0304420315300025-main.pdf Annett, Amber L., Skiba, Marta, Henley, Sian F., Venables, Hugh J., Meredith, Michael P., Statham, Peter J. and Ganeshram, Raja S. (2015) Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula. Marine Chemistry, 176, 21-33. (doi:10.1016/j.marchem.2015.06.017 <http://dx.doi.org/10.1016/j.marchem.2015.06.017>). cc_by_4 Article PeerReviewed 2015 ftsouthampton https://doi.org/10.1016/j.marchem.2015.06.017 2023-07-09T22:00:04Z Iron (Fe) is an essential micronutrient for phytoplankton, and is scarce in many regions including the open Southern Ocean. The western Antarctic Peninsula (WAP), an important source region of Fe to the wider Southern Ocean, is also the fastest warming region of the southern hemisphere. The relative importance of glacial versus marine Fe sources is currently poorly constrained, hindering projections of how changing oceanic circulation, productivity, and glacial dynamics may affect the balance of Fe sources in this region. Dissolved and total dissolvable Fe concentrations were measured throughout the summer bloom period at a coastal site on the WAP. Iron inputs to the surface mixed layer in early summer were strongly correlated with meteoric meltwater from glaciers and precipitation. A significant source of Fe from underlying waters was also identified, with dissolved Fe concentrations of up to 9.5 nM at 200 m depth. These two primary Fe sources act on different timescales, with glacial sources supplying Fe during the warm summer growing period, and deep water replenishing Fe over annual periods via deep winter mixing. Iron supply from deep water is sufficient to meet biological demand relative to macronutrient supply, making Fe limitation unlikely in this area even without additional summer Fe inputs from glacial sources. Both glacial and deep-water Fe sources may increase with continued climate warming, potentially enhancing the role of the WAP as an Fe source to offshore waters. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Southern Ocean University of Southampton: e-Prints Soton Antarctic Antarctic Peninsula Ryder ENVELOPE(-68.333,-68.333,-67.566,-67.566) Ryder Bay ENVELOPE(-68.333,-68.333,-67.567,-67.567) Southern Ocean Marine Chemistry 176 21 33 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
Iron (Fe) is an essential micronutrient for phytoplankton, and is scarce in many regions including the open Southern Ocean. The western Antarctic Peninsula (WAP), an important source region of Fe to the wider Southern Ocean, is also the fastest warming region of the southern hemisphere. The relative importance of glacial versus marine Fe sources is currently poorly constrained, hindering projections of how changing oceanic circulation, productivity, and glacial dynamics may affect the balance of Fe sources in this region. Dissolved and total dissolvable Fe concentrations were measured throughout the summer bloom period at a coastal site on the WAP. Iron inputs to the surface mixed layer in early summer were strongly correlated with meteoric meltwater from glaciers and precipitation. A significant source of Fe from underlying waters was also identified, with dissolved Fe concentrations of up to 9.5 nM at 200 m depth. These two primary Fe sources act on different timescales, with glacial sources supplying Fe during the warm summer growing period, and deep water replenishing Fe over annual periods via deep winter mixing. Iron supply from deep water is sufficient to meet biological demand relative to macronutrient supply, making Fe limitation unlikely in this area even without additional summer Fe inputs from glacial sources. Both glacial and deep-water Fe sources may increase with continued climate warming, potentially enhancing the role of the WAP as an Fe source to offshore waters. |
format |
Article in Journal/Newspaper |
author |
Annett, Amber L. Skiba, Marta Henley, Sian F. Venables, Hugh J. Meredith, Michael P. Statham, Peter J. Ganeshram, Raja S. |
spellingShingle |
Annett, Amber L. Skiba, Marta Henley, Sian F. Venables, Hugh J. Meredith, Michael P. Statham, Peter J. Ganeshram, Raja S. Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula |
author_facet |
Annett, Amber L. Skiba, Marta Henley, Sian F. Venables, Hugh J. Meredith, Michael P. Statham, Peter J. Ganeshram, Raja S. |
author_sort |
Annett, Amber L. |
title |
Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula |
title_short |
Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula |
title_full |
Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula |
title_fullStr |
Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula |
title_full_unstemmed |
Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula |
title_sort |
comparative roles of upwelling and glacial iron sources in ryder bay, coastal western antarctic peninsula |
publishDate |
2015 |
url |
https://eprints.soton.ac.uk/378899/ https://eprints.soton.ac.uk/378899/1/Annett_Comparative.pdf https://eprints.soton.ac.uk/378899/2/1-s2.0-S0304420315300025-main.pdf |
long_lat |
ENVELOPE(-68.333,-68.333,-67.566,-67.566) ENVELOPE(-68.333,-68.333,-67.567,-67.567) |
geographic |
Antarctic Antarctic Peninsula Ryder Ryder Bay Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Ryder Ryder Bay Southern Ocean |
genre |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Southern Ocean |
op_relation |
https://eprints.soton.ac.uk/378899/1/Annett_Comparative.pdf https://eprints.soton.ac.uk/378899/2/1-s2.0-S0304420315300025-main.pdf Annett, Amber L., Skiba, Marta, Henley, Sian F., Venables, Hugh J., Meredith, Michael P., Statham, Peter J. and Ganeshram, Raja S. (2015) Comparative roles of upwelling and glacial iron sources in Ryder Bay, coastal western Antarctic Peninsula. Marine Chemistry, 176, 21-33. (doi:10.1016/j.marchem.2015.06.017 <http://dx.doi.org/10.1016/j.marchem.2015.06.017>). |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1016/j.marchem.2015.06.017 |
container_title |
Marine Chemistry |
container_volume |
176 |
container_start_page |
21 |
op_container_end_page |
33 |
_version_ |
1772809544497364992 |