Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters
To evaluate the deposition and solubility of aerosol iron in the Antarctic seasonal sea ice zone (SSIZ), iron was measured in snow samples collected from three areas in the SSIZ (Prydz Bay, Dumont d'Urville Sea and Ross Sea) and one continental area (Princess Elizabeth Land) of East Antarctica....
Published in: | Geophysical Research Letters |
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ODU Digital Commons
2001
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Online Access: | https://digitalcommons.odu.edu/oeas_fac_pubs/91 https://doi.org/10.1029/2001gl012867 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1104/viewcontent/Edwards_2001_Iron_in_East_Antarctic_snow__Impl.pdf |
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1104 2023-06-11T04:07:05+02:00 Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters Edwards, Ross Sedwick, Peter N. 2001-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/91 https://doi.org/10.1029/2001gl012867 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1104/viewcontent/Edwards_2001_Iron_in_East_Antarctic_snow__Impl.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/91 doi:10.1029/2001gl012867 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1104/viewcontent/Edwards_2001_Iron_in_East_Antarctic_snow__Impl.pdf OES Faculty Publications Aerosol iron Antarctic seasonal sea ice zone SSIZ Southern Ocean Carbon dioxide Ice Metals Variability Greenland Aerosol Blooms Cycle Pole Biogeochemistry Marine Biology Oceanography and Atmospheric Sciences and Meteorology article 2001 ftolddominionuni https://doi.org/10.1029/2001gl012867 2023-05-08T17:59:38Z To evaluate the deposition and solubility of aerosol iron in the Antarctic seasonal sea ice zone (SSIZ), iron was measured in snow samples collected from three areas in the SSIZ (Prydz Bay, Dumont d'Urville Sea and Ross Sea) and one continental area (Princess Elizabeth Land) of East Antarctica. Concentrations of total-dissolvable iron (that soluble at pH ~2) ranged from 20-2950 pg g-1, with the lowest concentrations measured in snow from the Dumont d'Urville Sea. Using estimates of snow accumulation rates, we calculate atmospheric iron deposition fluxes of 0.017-0.11 mg m-2 yr-1(0.30-2.0 μmol m-2 yr-1, which are generally lower than previously published estimates. Measurements of iron in filtered meltwaters of snow samples from Prydz Bay and Princess Elizabeth Land suggest that similar to 10-90% of the total atmospheric iron is readily soluble. Assuming our results to be broadly representative of atmospheric deposition over seasonally ice-covered, high-nutrient Antarctic waters, we use our mean estimates of atmospheric iron deposition (1.1 μmol m-2 yr-1 and solubility (32%) to calculate that atmospheric iron potentially supports annual phytoplankton production of 1.1 X 1012 mole C in the Antarctic SSIZ, which is less than 5% of the estimated total annual primary production in this ocean region. Article in Journal/Newspaper Antarc* Antarctic Antarctica D'Urville Sea Dumont D'Urville Sea East Antarctica Greenland Princess Elizabeth Land Prydz Bay Ross Sea Sea ice Southern Ocean Old Dominion University: ODU Digital Commons Antarctic Southern Ocean The Antarctic East Antarctica Ross Sea Prydz Bay Greenland Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) Princess Elizabeth Land ENVELOPE(80.367,80.367,-68.500,-68.500) D'Urville Sea ENVELOPE(140.000,140.000,-65.000,-65.000) Geophysical Research Letters 28 20 3907 3910 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Aerosol iron Antarctic seasonal sea ice zone SSIZ Southern Ocean Carbon dioxide Ice Metals Variability Greenland Aerosol Blooms Cycle Pole Biogeochemistry Marine Biology Oceanography and Atmospheric Sciences and Meteorology |
spellingShingle |
Aerosol iron Antarctic seasonal sea ice zone SSIZ Southern Ocean Carbon dioxide Ice Metals Variability Greenland Aerosol Blooms Cycle Pole Biogeochemistry Marine Biology Oceanography and Atmospheric Sciences and Meteorology Edwards, Ross Sedwick, Peter N. Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters |
topic_facet |
Aerosol iron Antarctic seasonal sea ice zone SSIZ Southern Ocean Carbon dioxide Ice Metals Variability Greenland Aerosol Blooms Cycle Pole Biogeochemistry Marine Biology Oceanography and Atmospheric Sciences and Meteorology |
description |
To evaluate the deposition and solubility of aerosol iron in the Antarctic seasonal sea ice zone (SSIZ), iron was measured in snow samples collected from three areas in the SSIZ (Prydz Bay, Dumont d'Urville Sea and Ross Sea) and one continental area (Princess Elizabeth Land) of East Antarctica. Concentrations of total-dissolvable iron (that soluble at pH ~2) ranged from 20-2950 pg g-1, with the lowest concentrations measured in snow from the Dumont d'Urville Sea. Using estimates of snow accumulation rates, we calculate atmospheric iron deposition fluxes of 0.017-0.11 mg m-2 yr-1(0.30-2.0 μmol m-2 yr-1, which are generally lower than previously published estimates. Measurements of iron in filtered meltwaters of snow samples from Prydz Bay and Princess Elizabeth Land suggest that similar to 10-90% of the total atmospheric iron is readily soluble. Assuming our results to be broadly representative of atmospheric deposition over seasonally ice-covered, high-nutrient Antarctic waters, we use our mean estimates of atmospheric iron deposition (1.1 μmol m-2 yr-1 and solubility (32%) to calculate that atmospheric iron potentially supports annual phytoplankton production of 1.1 X 1012 mole C in the Antarctic SSIZ, which is less than 5% of the estimated total annual primary production in this ocean region. |
format |
Article in Journal/Newspaper |
author |
Edwards, Ross Sedwick, Peter N. |
author_facet |
Edwards, Ross Sedwick, Peter N. |
author_sort |
Edwards, Ross |
title |
Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters |
title_short |
Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters |
title_full |
Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters |
title_fullStr |
Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters |
title_full_unstemmed |
Iron in East Antarctic Snow: Implications for Atmospheric Iron Deposition and Algal Production in Antarctic Waters |
title_sort |
iron in east antarctic snow: implications for atmospheric iron deposition and algal production in antarctic waters |
publisher |
ODU Digital Commons |
publishDate |
2001 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/91 https://doi.org/10.1029/2001gl012867 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1104/viewcontent/Edwards_2001_Iron_in_East_Antarctic_snow__Impl.pdf |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(140.013,140.013,-66.667,-66.667) ENVELOPE(80.367,80.367,-68.500,-68.500) ENVELOPE(140.000,140.000,-65.000,-65.000) |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica Ross Sea Prydz Bay Greenland Dumont d'Urville Dumont-d'Urville Princess Elizabeth Land D'Urville Sea |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica Ross Sea Prydz Bay Greenland Dumont d'Urville Dumont-d'Urville Princess Elizabeth Land D'Urville Sea |
genre |
Antarc* Antarctic Antarctica D'Urville Sea Dumont D'Urville Sea East Antarctica Greenland Princess Elizabeth Land Prydz Bay Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica D'Urville Sea Dumont D'Urville Sea East Antarctica Greenland Princess Elizabeth Land Prydz Bay Ross Sea Sea ice Southern Ocean |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/91 doi:10.1029/2001gl012867 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1104/viewcontent/Edwards_2001_Iron_in_East_Antarctic_snow__Impl.pdf |
op_doi |
https://doi.org/10.1029/2001gl012867 |
container_title |
Geophysical Research Letters |
container_volume |
28 |
container_issue |
20 |
container_start_page |
3907 |
op_container_end_page |
3910 |
_version_ |
1768379678407524352 |