Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf
Marine iodine speciation has emerged as a potential tracer of primary productivity, sedimentary inputs, and ocean oxygenation. The reaction of iodide with ozone at the sea surface has also been identified as the largest deposition sink for tropospheric ozone and the dominant source of iodine to the...
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ftfrontimediafig:oai:figshare.com:article/12895472 2023-05-15T18:25:03+02:00 Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf Rosie Chance Liselotte Tinel Amit Sarkar Alok K. Sinha Anoop S. Mahajan Racheal Chacko P. Sabu Rajdeep Roy Tim D. Jickells David P. Stevens Martin Wadley Lucy J. Carpenter 2020-08-31T05:49:39Z https://doi.org/10.3389/fmars.2020.00621.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Surface_Inorganic_Iodine_Speciation_in_the_Indian_and_Southern_Oceans_From_12_N_to_70_S_pdf/12895472 unknown doi:10.3389/fmars.2020.00621.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Surface_Inorganic_Iodine_Speciation_in_the_Indian_and_Southern_Oceans_From_12_N_to_70_S_pdf/12895472 Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering iodine iodide iodate seawater Indian Ocean Southern Ocean Dataset 2020 ftfrontimediafig https://doi.org/10.3389/fmars.2020.00621.s001 2020-09-02T22:55:24Z Marine iodine speciation has emerged as a potential tracer of primary productivity, sedimentary inputs, and ocean oxygenation. The reaction of iodide with ozone at the sea surface has also been identified as the largest deposition sink for tropospheric ozone and the dominant source of iodine to the atmosphere. Accurate incorporation of these processes into atmospheric models requires improved understanding of iodide concentrations at the air-sea interface. Observations of sea surface iodide are relatively sparse and are particularly lacking in the Indian Ocean basin. Here we examine 127 new sea surface (≤10 m depth) iodide and iodate observations made during three cruises in the Indian Ocean and the Indian sector of the Southern Ocean. The observations span latitudes from ∼12°N to ∼70°S, and include three distinct hydrographic regimes: the South Indian subtropical gyre, the Southern Ocean and the northern Indian Ocean including the southern Bay of Bengal. Concentrations and spatial distribution of sea surface iodide follow the same general trends as in other ocean basins, with iodide concentrations tending to decrease with increasing latitude (and decreasing sea surface temperature). However, the gradient of this relationship was steeper in subtropical waters of the Indian Ocean than in the Atlantic or Pacific, suggesting that it might not be accurately represented by widely used parameterizations based on sea surface temperature. This difference in gradients between basins may arise from differences in phytoplankton community composition and/or iodide production rates. Iodide concentrations in the tropical northern Indian Ocean were higher and more variable than elsewhere. Two extremely high iodide concentrations (1241 and 949 nM) were encountered in the Bay of Bengal and are thought to be associated with sedimentary inputs under low oxygen conditions. Excluding these outliers, sea surface iodide concentrations ranged from 20 to 250 nM, with a median of 61 nM. Controls on sea surface iodide concentrations in ... Dataset Southern Ocean Frontiers: Figshare Southern Ocean Pacific Indian |
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Open Polar |
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Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering iodine iodide iodate seawater Indian Ocean Southern Ocean |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering iodine iodide iodate seawater Indian Ocean Southern Ocean Rosie Chance Liselotte Tinel Amit Sarkar Alok K. Sinha Anoop S. Mahajan Racheal Chacko P. Sabu Rajdeep Roy Tim D. Jickells David P. Stevens Martin Wadley Lucy J. Carpenter Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering iodine iodide iodate seawater Indian Ocean Southern Ocean |
description |
Marine iodine speciation has emerged as a potential tracer of primary productivity, sedimentary inputs, and ocean oxygenation. The reaction of iodide with ozone at the sea surface has also been identified as the largest deposition sink for tropospheric ozone and the dominant source of iodine to the atmosphere. Accurate incorporation of these processes into atmospheric models requires improved understanding of iodide concentrations at the air-sea interface. Observations of sea surface iodide are relatively sparse and are particularly lacking in the Indian Ocean basin. Here we examine 127 new sea surface (≤10 m depth) iodide and iodate observations made during three cruises in the Indian Ocean and the Indian sector of the Southern Ocean. The observations span latitudes from ∼12°N to ∼70°S, and include three distinct hydrographic regimes: the South Indian subtropical gyre, the Southern Ocean and the northern Indian Ocean including the southern Bay of Bengal. Concentrations and spatial distribution of sea surface iodide follow the same general trends as in other ocean basins, with iodide concentrations tending to decrease with increasing latitude (and decreasing sea surface temperature). However, the gradient of this relationship was steeper in subtropical waters of the Indian Ocean than in the Atlantic or Pacific, suggesting that it might not be accurately represented by widely used parameterizations based on sea surface temperature. This difference in gradients between basins may arise from differences in phytoplankton community composition and/or iodide production rates. Iodide concentrations in the tropical northern Indian Ocean were higher and more variable than elsewhere. Two extremely high iodide concentrations (1241 and 949 nM) were encountered in the Bay of Bengal and are thought to be associated with sedimentary inputs under low oxygen conditions. Excluding these outliers, sea surface iodide concentrations ranged from 20 to 250 nM, with a median of 61 nM. Controls on sea surface iodide concentrations in ... |
format |
Dataset |
author |
Rosie Chance Liselotte Tinel Amit Sarkar Alok K. Sinha Anoop S. Mahajan Racheal Chacko P. Sabu Rajdeep Roy Tim D. Jickells David P. Stevens Martin Wadley Lucy J. Carpenter |
author_facet |
Rosie Chance Liselotte Tinel Amit Sarkar Alok K. Sinha Anoop S. Mahajan Racheal Chacko P. Sabu Rajdeep Roy Tim D. Jickells David P. Stevens Martin Wadley Lucy J. Carpenter |
author_sort |
Rosie Chance |
title |
Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf |
title_short |
Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf |
title_full |
Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf |
title_fullStr |
Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf |
title_full_unstemmed |
Data_Sheet_1_Surface Inorganic Iodine Speciation in the Indian and Southern Oceans From 12°N to 70°S.pdf |
title_sort |
data_sheet_1_surface inorganic iodine speciation in the indian and southern oceans from 12°n to 70°s.pdf |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00621.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Surface_Inorganic_Iodine_Speciation_in_the_Indian_and_Southern_Oceans_From_12_N_to_70_S_pdf/12895472 |
geographic |
Southern Ocean Pacific Indian |
geographic_facet |
Southern Ocean Pacific Indian |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
doi:10.3389/fmars.2020.00621.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Surface_Inorganic_Iodine_Speciation_in_the_Indian_and_Southern_Oceans_From_12_N_to_70_S_pdf/12895472 |
op_doi |
https://doi.org/10.3389/fmars.2020.00621.s001 |
_version_ |
1766206215114719232 |