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Title: Constraining Present‐Day Anthropogenic Total Iron Emissions Using Model and Observations

Journal Article · · Journal of Geophysical Research. Atmospheres
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  1. Department of Atmospheric Science Colorado State University Fort Collins CO USA, La Follette School of Public Affairs University of Wisconsin‐Madison Madison WI USA
  2. Marine, Earth and Atmospheric Sciences North Carolina State University Raleigh NC USA
  3. Department of Atmospheric Science Colorado State University Fort Collins CO USA, Columbia University New York NY USA
  4. Department of Atmospheric Science Colorado State University Fort Collins CO USA
  5. Department of Earth and Atmospheric Sciences Cornell University Ithaca NY USA
  6. Institute of Environmental Assessment and Water Research (IDAEA‐CSIC) Barcelona Spain
  7. Institute of Marine Sciences University of California Santa Cruz CA USA
  8. Instituto de Fisica Universidade de Sao Paulo Sao Paulo Brazil
  9. Israel Oceanographic &, Limnological Research Haifa Israel
  10. Rosenstiel School of Marine and Atmospheric Science University of Miami Miami FL USA
  11. Department of Civil &, Environmental Engineering Texas A&,M University College Station TX USA
  12. Swiss Federal Laboratories for Materials Science and Technology (EMPA) Duebendorf Switzerland
  13. Dip. Scienze della Terra e del Mare University of Palermo Palermo Italy
  14. Australian Nuclear Science and Technology Organization Lucas Heights NSW Australia
  15. Comisión Nacional de Energía Atómica Universidad de Buenos Aires Buenos Aires Argentina
  16. Geography Institute Pontificia Universidad Católica de Chile Santiago Chile
  17. Saw Science Invercargill New Zealand
  18. Laboratoire Interuniversitaire des Systèmes Atmosphériques Université Paris Cité and University Paris Est Creteil CNRS Paris France
  19. Izaña Atmospheric Research Centre AEMET Joint Research Unit to CSIC Élimate and Composition of the AtmosphereÏ La Marina 20 Santa Cruz de Tenerife Spain, Group of Atmosphere Aerosols and Climate IPNA CSIC Tenerife Spain
  20. Izaña Atmospheric Research Centre AEMET Joint Research Unit to CSIC Élimate and Composition of the AtmosphereÏ La Marina 20 Santa Cruz de Tenerife Spain, Department of R&,D CIMEL Electronique Paris France
  21. Cooperative Institute for Research in the Atmosphere Colorado State University Fort Collins CO USA
  22. Finnish Meteorological Institute Helsinki Finland
  23. Earth &, Planetary Sciences Department Institute of Marine Sciences University of California Santa Cruz CA USA
  24. Institute for a Sustainable Environment Clarkson University Potsdam NY USA
  25. School of Geography Earth and Environmental Sciences University of Birmingham Birmingham UK
  26. Energy Environmental and Chemical Engineering Washington University St. Louis MO USA
  27. Department of Chemistry Ghent University Gent Belgium
  28. Universidad de Navarra Instituto de Biodiversidad y Medioambiente BIOMA Pamplona Spain
  29. National Institute of Environmental Health Sciences National Health Research Institutes Miaoli Taiwan
  30. Department of Mechanical Engineering Colorado State University Fort Collins CO USA

Abstract Iron emissions from human activities, such as oil combustion and smelting, affect the Earth's climate and marine ecosystems. These emissions are difficult to quantify accurately due to a lack of observations, particularly in remote ocean regions. In this study, we used long‐term, near‐source observations in areas with a dominance of anthropogenic iron emissions in various parts of the world to better estimate the total amount of anthropogenic iron emissions. We also used a statistical source apportionment method to identify the anthropogenic components and their sub‐sources from bulk aerosol observations in the United States. We find that the estimates of anthropogenic iron emissions are within a factor of 3 in most regions compared to previous inventory estimates. Under‐ or overestimation varied by region and depended on the number of sites, interannual variability, and the statistical filter choice. Smelting‐related iron emissions are overestimated by a factor of 1.5 in East Asia compared to previous estimates. More long‐term iron observations and the consideration of the influence of dust and wildfires could help reduce the uncertainty in anthropogenic iron emissions estimates.

Research Organization:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC)
Grant/Contract Number:
SC0016362
OSTI ID:
2438398
Journal Information:
Journal of Geophysical Research. Atmospheres, Journal Name: Journal of Geophysical Research. Atmospheres Journal Issue: 17 Vol. 129; ISSN 2169-897X
Publisher:
American Geophysical Union (AGU)Copyright Statement
Country of Publication:
United States
Language:
English

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