A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory
Atmospheric supply of iron can modulate ocean biogeochemistry, due to its key role in global nitrogen and carbon cycles. Current estimates predict up to 20% of global ocean net primary productivity depends on an atmospheric iron source. Using a technology–based methodology, we revise total and solub...
Published in: | Journal of Geophysical Research: Atmospheres |
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Online Access: | http://www.osti.gov/servlets/purl/1734785 https://www.osti.gov/biblio/1734785 https://doi.org/10.1029/2019jd032114 |
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ftosti:oai:osti.gov:1734785 2023-07-30T04:07:03+02:00 A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory Rathod, Sagar D. Hamilton, Douglas S. Mahowald, Natalie M. Klimont, Zbigniew Corbett, James J. Bond, Tami C. 2021-08-03 application/pdf http://www.osti.gov/servlets/purl/1734785 https://www.osti.gov/biblio/1734785 https://doi.org/10.1029/2019jd032114 unknown http://www.osti.gov/servlets/purl/1734785 https://www.osti.gov/biblio/1734785 https://doi.org/10.1029/2019jd032114 doi:10.1029/2019jd032114 58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES 2021 ftosti https://doi.org/10.1029/2019jd032114 2023-07-11T09:57:03Z Atmospheric supply of iron can modulate ocean biogeochemistry, due to its key role in global nitrogen and carbon cycles. Current estimates predict up to 20% of global ocean net primary productivity depends on an atmospheric iron source. Using a technology–based methodology, we revise total and soluble anthropogenic iron emissions and resolve iron into its mineral components, which allows modeling mineral–specific atmospheric reactions. We compare different methodologies for representing anthropogenic iron solubility: measured in mild and strong leaches and estimated using a mineralogy basis and identify the emissions that are most affected by such assumptions. The inclusion of metal smelting as an iron source increases iron emissions by up to 10 times higher in the fine aerosol fraction (smaller than 1 μm) than most previous inventories. Different solubility assumptions alter anthropogenic soluble iron emissions and deposition by a factor of 20 and 10, respectively. Using solubilities measured in mild leaches and calculated by mineralogy give 20–30 Gg/yr anthropogenic emissions and 40–50 Gg/yr deposition, while those measured in strong leaches give 80–440 Gg/yr emissions and 200–450 Gg/yr deposition. Here, this range of anthropogenic soluble iron deposition leads to global soluble iron deposition of 1,900–2,300 Gg/yr when dust, wildfires, and atmospheric processing are included, indicating such assumptions can affect global soluble iron supply by about 30%. In regions where marine primary productivity is iron limited, anthropogenic combustion–iron contributes up to half of the atmospheric soluble iron flux to the North Pacific Ocean but supplies less than 5% to the Southern Ocean. Other/Unknown Material Southern Ocean SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) Southern Ocean Pacific Journal of Geophysical Research: Atmospheres 125 17 |
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58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES |
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58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES Rathod, Sagar D. Hamilton, Douglas S. Mahowald, Natalie M. Klimont, Zbigniew Corbett, James J. Bond, Tami C. A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory |
topic_facet |
58 GEOSCIENCES 54 ENVIRONMENTAL SCIENCES |
description |
Atmospheric supply of iron can modulate ocean biogeochemistry, due to its key role in global nitrogen and carbon cycles. Current estimates predict up to 20% of global ocean net primary productivity depends on an atmospheric iron source. Using a technology–based methodology, we revise total and soluble anthropogenic iron emissions and resolve iron into its mineral components, which allows modeling mineral–specific atmospheric reactions. We compare different methodologies for representing anthropogenic iron solubility: measured in mild and strong leaches and estimated using a mineralogy basis and identify the emissions that are most affected by such assumptions. The inclusion of metal smelting as an iron source increases iron emissions by up to 10 times higher in the fine aerosol fraction (smaller than 1 μm) than most previous inventories. Different solubility assumptions alter anthropogenic soluble iron emissions and deposition by a factor of 20 and 10, respectively. Using solubilities measured in mild leaches and calculated by mineralogy give 20–30 Gg/yr anthropogenic emissions and 40–50 Gg/yr deposition, while those measured in strong leaches give 80–440 Gg/yr emissions and 200–450 Gg/yr deposition. Here, this range of anthropogenic soluble iron deposition leads to global soluble iron deposition of 1,900–2,300 Gg/yr when dust, wildfires, and atmospheric processing are included, indicating such assumptions can affect global soluble iron supply by about 30%. In regions where marine primary productivity is iron limited, anthropogenic combustion–iron contributes up to half of the atmospheric soluble iron flux to the North Pacific Ocean but supplies less than 5% to the Southern Ocean. |
author |
Rathod, Sagar D. Hamilton, Douglas S. Mahowald, Natalie M. Klimont, Zbigniew Corbett, James J. Bond, Tami C. |
author_facet |
Rathod, Sagar D. Hamilton, Douglas S. Mahowald, Natalie M. Klimont, Zbigniew Corbett, James J. Bond, Tami C. |
author_sort |
Rathod, Sagar D. |
title |
A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory |
title_short |
A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory |
title_full |
A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory |
title_fullStr |
A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory |
title_full_unstemmed |
A Mineralogy–Based Anthropogenic Combustion–Iron Emission Inventory |
title_sort |
mineralogy–based anthropogenic combustion–iron emission inventory |
publishDate |
2021 |
url |
http://www.osti.gov/servlets/purl/1734785 https://www.osti.gov/biblio/1734785 https://doi.org/10.1029/2019jd032114 |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
http://www.osti.gov/servlets/purl/1734785 https://www.osti.gov/biblio/1734785 https://doi.org/10.1029/2019jd032114 doi:10.1029/2019jd032114 |
op_doi |
https://doi.org/10.1029/2019jd032114 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
125 |
container_issue |
17 |
_version_ |
1772820146044272640 |