Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica
We present high-accuracy isotope dilution mass spectrometry data on dissolved Fe (DFe), total dissolvable Fe (TD-Fe) and refractory particulate Fe (REF-Fe) concentrations in snow, land-fast ice and under-ice seawater, sampled at six sites from 14 to 22 January 2003 in Erebus Bay, McMurdo Sound. We a...
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ftunivbruxelles:oai:dipot.ulb.ac.be:2013/156297 2023-08-27T04:05:58+02:00 Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica de Jong, Jeroen Schoemann, Véronique Maricq, Nathalie Mattielli, Nadine Langhorne, Pat Haskell, T.G. Tison, Jean-Louis 2013 1 full-text file(s): application/pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156297 https://dipot.ulb.ac.be/dspace/bitstream/2013/156297/1/Elsevier_141233.pdf en eng uri/info:doi/10.1016/j.marchem.2013.07.001 uri/info:pii/S0304420313001400 uri/info:scp/84883363408 https://dipot.ulb.ac.be/dspace/bitstream/2013/156297/1/Elsevier_141233.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156297 1 full-text file(s): info:eu-repo/semantics/restrictedAccess Marine chemistry, 157 Glaciologie Atmospheric particulates Iron Primary production Resuspension Sea ice Sediments Suspended particulate matter info:eu-repo/semantics/article info:ulb-repo/semantics/articlePeerReview info:ulb-repo/semantics/openurl/article 2013 ftunivbruxelles 2023-08-09T22:23:08Z We present high-accuracy isotope dilution mass spectrometry data on dissolved Fe (DFe), total dissolvable Fe (TD-Fe) and refractory particulate Fe (REF-Fe) concentrations in snow, land-fast ice and under-ice seawater, sampled at six sites from 14 to 22 January 2003 in Erebus Bay, McMurdo Sound. We also report refractory particulate Fe/Al ratios to help identify Fe sources. Iron concentrations in land-fast ice and snow were two to three orders of magnitude higher than the underlying seawater. Seawater Fe increased in all fractions over the sampling period (8. days), likely caused by sediment resuspension induced by spring tides, which occur twice a month. We propose that entrainment of wind-blown material and sediment-derived Fe is the most important pathway for high Fe concentrations in land-fast ice in McMurdo Sound. Iron fluxes from the sediment were estimated and could fully account for the Fe inventory of the land-fast ice. Wind-blown lithogenic material in the snow on the land-fast ice makes up for 14-68% of the total Fe inventory of the sea ice. It does not appear to penetrate into the sea ice proper as snow-ice forming conditions were not present. The sources of these wind-blown particles are, in decreasing order of strength, the McMurdo Ice Shelf, the Dry Valleys, Ross Island and Erebus volcanic emissions. The data suggest that the usual spring breakup of sediment-laden land-fast ice to the Ross Sea may have a significant potential fertilizing effect on the waters of the Ross Sea Polynya. This is illustrated by the strong diminution of primary production in the Ross Sea Polynya due to the blockade of the annual sea ice breakout by the giant icebergs B-15 and C-19 during the austral summer of 2003. © 2013 Elsevier B.V. SCOPUS: ar.j info:eu-repo/semantics/published Article in Journal/Newspaper Antarc* Antarctica Ice Shelf McMurdo Ice Shelf McMurdo Sound Ross Island Ross Sea Sea ice DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) Austral Ross Sea McMurdo Sound Ross Island McMurdo Ice Shelf ENVELOPE(166.500,166.500,-78.000,-78.000) Erebus Bay ENVELOPE(166.517,166.517,-77.733,-77.733) |
institution |
Open Polar |
collection |
DI-fusion : dépôt institutionnel de l'Université libre de Bruxelles (ULB) |
op_collection_id |
ftunivbruxelles |
language |
English |
topic |
Glaciologie Atmospheric particulates Iron Primary production Resuspension Sea ice Sediments Suspended particulate matter |
spellingShingle |
Glaciologie Atmospheric particulates Iron Primary production Resuspension Sea ice Sediments Suspended particulate matter de Jong, Jeroen Schoemann, Véronique Maricq, Nathalie Mattielli, Nadine Langhorne, Pat Haskell, T.G. Tison, Jean-Louis Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica |
topic_facet |
Glaciologie Atmospheric particulates Iron Primary production Resuspension Sea ice Sediments Suspended particulate matter |
description |
We present high-accuracy isotope dilution mass spectrometry data on dissolved Fe (DFe), total dissolvable Fe (TD-Fe) and refractory particulate Fe (REF-Fe) concentrations in snow, land-fast ice and under-ice seawater, sampled at six sites from 14 to 22 January 2003 in Erebus Bay, McMurdo Sound. We also report refractory particulate Fe/Al ratios to help identify Fe sources. Iron concentrations in land-fast ice and snow were two to three orders of magnitude higher than the underlying seawater. Seawater Fe increased in all fractions over the sampling period (8. days), likely caused by sediment resuspension induced by spring tides, which occur twice a month. We propose that entrainment of wind-blown material and sediment-derived Fe is the most important pathway for high Fe concentrations in land-fast ice in McMurdo Sound. Iron fluxes from the sediment were estimated and could fully account for the Fe inventory of the land-fast ice. Wind-blown lithogenic material in the snow on the land-fast ice makes up for 14-68% of the total Fe inventory of the sea ice. It does not appear to penetrate into the sea ice proper as snow-ice forming conditions were not present. The sources of these wind-blown particles are, in decreasing order of strength, the McMurdo Ice Shelf, the Dry Valleys, Ross Island and Erebus volcanic emissions. The data suggest that the usual spring breakup of sediment-laden land-fast ice to the Ross Sea may have a significant potential fertilizing effect on the waters of the Ross Sea Polynya. This is illustrated by the strong diminution of primary production in the Ross Sea Polynya due to the blockade of the annual sea ice breakout by the giant icebergs B-15 and C-19 during the austral summer of 2003. © 2013 Elsevier B.V. SCOPUS: ar.j info:eu-repo/semantics/published |
format |
Article in Journal/Newspaper |
author |
de Jong, Jeroen Schoemann, Véronique Maricq, Nathalie Mattielli, Nadine Langhorne, Pat Haskell, T.G. Tison, Jean-Louis |
author_facet |
de Jong, Jeroen Schoemann, Véronique Maricq, Nathalie Mattielli, Nadine Langhorne, Pat Haskell, T.G. Tison, Jean-Louis |
author_sort |
de Jong, Jeroen |
title |
Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica |
title_short |
Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica |
title_full |
Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica |
title_fullStr |
Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica |
title_full_unstemmed |
Iron in land-fast sea ice of McMurdo Sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the Ross Sea, Antarctica |
title_sort |
iron in land-fast sea ice of mcmurdo sound derived from sediment resuspension and wind-blown dust attributes to primary productivity in the ross sea, antarctica |
publishDate |
2013 |
url |
http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156297 https://dipot.ulb.ac.be/dspace/bitstream/2013/156297/1/Elsevier_141233.pdf |
long_lat |
ENVELOPE(166.500,166.500,-78.000,-78.000) ENVELOPE(166.517,166.517,-77.733,-77.733) |
geographic |
Austral Ross Sea McMurdo Sound Ross Island McMurdo Ice Shelf Erebus Bay |
geographic_facet |
Austral Ross Sea McMurdo Sound Ross Island McMurdo Ice Shelf Erebus Bay |
genre |
Antarc* Antarctica Ice Shelf McMurdo Ice Shelf McMurdo Sound Ross Island Ross Sea Sea ice |
genre_facet |
Antarc* Antarctica Ice Shelf McMurdo Ice Shelf McMurdo Sound Ross Island Ross Sea Sea ice |
op_source |
Marine chemistry, 157 |
op_relation |
uri/info:doi/10.1016/j.marchem.2013.07.001 uri/info:pii/S0304420313001400 uri/info:scp/84883363408 https://dipot.ulb.ac.be/dspace/bitstream/2013/156297/1/Elsevier_141233.pdf http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/156297 |
op_rights |
1 full-text file(s): info:eu-repo/semantics/restrictedAccess |
_version_ |
1775346692083679232 |