Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020)
Iron can be a growth‐limiting nutrient for phytoplankton, modifying rates of net primary production, nitrogen fixation, and carbon export, highlighting the importance of new iron inputs from the atmosphere. The bioavailable iron fraction depends on the emission source and the dissolution during tran...
Main Authors: | , , , , , , , , , , , , |
---|---|
Format: | Dataset |
Language: | English |
Published: |
2020
|
Subjects: | |
Online Access: | https://hdl.handle.net/1813/67024 https://doi.org/10.7298/fbd6-sg85 |
id |
ftcornelluniv:oai:ecommons.cornell.edu:1813/67024 |
---|---|
record_format |
openpolar |
spelling |
ftcornelluniv:oai:ecommons.cornell.edu:1813/67024 2023-07-30T04:07:02+02:00 Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020) Hamilton, Douglas S Moore, Keith Arneth, Almut Bond, Tami Carslaw, Ken S Hanston, Stijn Ito, Akinori Kaplan, Jed O Lindsay, Keith Nieradzik, Lars P Rathod, Sagar D Scanza, Rachel A Mahowald, Natalie M 2020-02-25 text/plain application/octet-stream https://hdl.handle.net/1813/67024 https://doi.org/10.7298/fbd6-sg85 en_US eng Douglas S. Hamilton, Keith Moore, Almut Arneth, Tami Bond, Ken S. Carslaw, Stijn Hanston, Akinori Ito, Jed O. Kaplan, Keith Lindsay, Lars P. Nieradzik, Sagar D. Rathod, Rachel A. Scanza, and Natalie M. Mahowald. (2020). Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene. Global Biogeochemical Cycles. https://doi.org/10.1029/2019GB006448 https://doi.org/10.1029/2019GB006448 https://hdl.handle.net/1813/67024 https://doi.org/10.7298/fbd6-sg85 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ iron cycle carbon cycle nitrogen cycle marine net primary productivity dataset 2020 ftcornelluniv https://doi.org/10.7298/fbd6-sg8510.1029/2019GB006448 2023-07-15T18:35:28Z Iron can be a growth‐limiting nutrient for phytoplankton, modifying rates of net primary production, nitrogen fixation, and carbon export, highlighting the importance of new iron inputs from the atmosphere. The bioavailable iron fraction depends on the emission source and the dissolution during transport. The impacts of anthropogenic combustion and land use change on emissions from industrial, domestic, shipping, desert, and wildfire sources suggest that Northern Hemisphere soluble iron deposition has likely been enhanced between 2 to 68% over the Industrial Era. If policy and climate follow the intermediate Representative Concentration Pathway 4.5 trajectory then results suggest that Southern Ocean (>30°S) soluble iron deposition would be enhanced between 63 to 95% by 2100. Marine net primary productivity and carbon export within the open ocean are most sensitive to changes in soluble iron deposition in the Southern Hemisphere; this is predominantly driven by fire rather than dust iron sources. Changes in iron deposition cause large perturbations to the marine nitrogen cycle, up to 70% increase in denitrification and 15% increase in nitrogen fixation, but only modestly impacts the carbon cycle and atmospheric CO2 concentrations (1‐3 ppm). Regionally, primary productivity increases due to increased iron deposition are often compensated by offsetting decreases downstream corresponding to equivalent changes in the rate of phytoplankton macronutrient uptake, particularly in the equatorial Pacific. These effects are weaker in the Southern Ocean, suggesting that changes in iron deposition in this region dominates the global carbon cycle and climate response. This work was supported by Department of Energy (DOE) and National Science Foundation (NSF) grants for atmospheric deposition impacts on ocean biogeochemistry (DE-Sc0016362; NSF 1049033; CCF-1522054). DSH was also supported by the Atkinson Center for a Sustainable Future. JKM was also supported by DOE grant DE-SC0016539. AA would like to thank the Helmholtz ... Dataset Southern Ocean Cornell University: eCommons@Cornell Atkinson ENVELOPE(-85.483,-85.483,-78.650,-78.650) Pacific Southern Ocean |
institution |
Open Polar |
collection |
Cornell University: eCommons@Cornell |
op_collection_id |
ftcornelluniv |
language |
English |
topic |
iron cycle carbon cycle nitrogen cycle marine net primary productivity |
spellingShingle |
iron cycle carbon cycle nitrogen cycle marine net primary productivity Hamilton, Douglas S Moore, Keith Arneth, Almut Bond, Tami Carslaw, Ken S Hanston, Stijn Ito, Akinori Kaplan, Jed O Lindsay, Keith Nieradzik, Lars P Rathod, Sagar D Scanza, Rachel A Mahowald, Natalie M Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020) |
topic_facet |
iron cycle carbon cycle nitrogen cycle marine net primary productivity |
description |
Iron can be a growth‐limiting nutrient for phytoplankton, modifying rates of net primary production, nitrogen fixation, and carbon export, highlighting the importance of new iron inputs from the atmosphere. The bioavailable iron fraction depends on the emission source and the dissolution during transport. The impacts of anthropogenic combustion and land use change on emissions from industrial, domestic, shipping, desert, and wildfire sources suggest that Northern Hemisphere soluble iron deposition has likely been enhanced between 2 to 68% over the Industrial Era. If policy and climate follow the intermediate Representative Concentration Pathway 4.5 trajectory then results suggest that Southern Ocean (>30°S) soluble iron deposition would be enhanced between 63 to 95% by 2100. Marine net primary productivity and carbon export within the open ocean are most sensitive to changes in soluble iron deposition in the Southern Hemisphere; this is predominantly driven by fire rather than dust iron sources. Changes in iron deposition cause large perturbations to the marine nitrogen cycle, up to 70% increase in denitrification and 15% increase in nitrogen fixation, but only modestly impacts the carbon cycle and atmospheric CO2 concentrations (1‐3 ppm). Regionally, primary productivity increases due to increased iron deposition are often compensated by offsetting decreases downstream corresponding to equivalent changes in the rate of phytoplankton macronutrient uptake, particularly in the equatorial Pacific. These effects are weaker in the Southern Ocean, suggesting that changes in iron deposition in this region dominates the global carbon cycle and climate response. This work was supported by Department of Energy (DOE) and National Science Foundation (NSF) grants for atmospheric deposition impacts on ocean biogeochemistry (DE-Sc0016362; NSF 1049033; CCF-1522054). DSH was also supported by the Atkinson Center for a Sustainable Future. JKM was also supported by DOE grant DE-SC0016539. AA would like to thank the Helmholtz ... |
format |
Dataset |
author |
Hamilton, Douglas S Moore, Keith Arneth, Almut Bond, Tami Carslaw, Ken S Hanston, Stijn Ito, Akinori Kaplan, Jed O Lindsay, Keith Nieradzik, Lars P Rathod, Sagar D Scanza, Rachel A Mahowald, Natalie M |
author_facet |
Hamilton, Douglas S Moore, Keith Arneth, Almut Bond, Tami Carslaw, Ken S Hanston, Stijn Ito, Akinori Kaplan, Jed O Lindsay, Keith Nieradzik, Lars P Rathod, Sagar D Scanza, Rachel A Mahowald, Natalie M |
author_sort |
Hamilton, Douglas S |
title |
Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020) |
title_short |
Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020) |
title_full |
Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020) |
title_fullStr |
Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020) |
title_full_unstemmed |
Annual mean soluble iron deposition and ocean BGC response for each case in Hamilton et al. (2020) |
title_sort |
annual mean soluble iron deposition and ocean bgc response for each case in hamilton et al. (2020) |
publishDate |
2020 |
url |
https://hdl.handle.net/1813/67024 https://doi.org/10.7298/fbd6-sg85 |
long_lat |
ENVELOPE(-85.483,-85.483,-78.650,-78.650) |
geographic |
Atkinson Pacific Southern Ocean |
geographic_facet |
Atkinson Pacific Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
Douglas S. Hamilton, Keith Moore, Almut Arneth, Tami Bond, Ken S. Carslaw, Stijn Hanston, Akinori Ito, Jed O. Kaplan, Keith Lindsay, Lars P. Nieradzik, Sagar D. Rathod, Rachel A. Scanza, and Natalie M. Mahowald. (2020). Impact of Changes to the Atmospheric Soluble Iron Deposition Flux on Ocean Biogeochemical Cycles in the Anthropocene. Global Biogeochemical Cycles. https://doi.org/10.1029/2019GB006448 https://doi.org/10.1029/2019GB006448 https://hdl.handle.net/1813/67024 https://doi.org/10.7298/fbd6-sg85 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.7298/fbd6-sg8510.1029/2019GB006448 |
_version_ |
1772820104874033152 |