Browsing by Author "Rathod, Sagar D."

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    Anthropogenic Perturbations to the Atmospheric Molybdenum Cycle
    (2021) Wong, Michelle Y.; Rathod, Sagar D.; Marino, Roxanne; Li, Longlei; Lambert, Fabrice; Howarth, Robert W.; Alastuey, Andres; Alaimo,Maria Grazia; Barraza, Francisco; Castro Carneiro, Manuel
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    Constraining Present-Day Anthropogenic Total Iron Emissions Using Model and Observations
    (2024) Rathod, Sagar D.; Hamilton, Douglas S.; Nino, Lance; Kreidenweis, Sonia M.; Bian, Qijing; Mahowald, Natalie M.; Alastuey, Andres; Querol, Xavier; Paytan, Adina; Artaxo, Paulo; Herut, Barak; Gaston, Cassandra; Prospero, Joseph; Chellam, Shankararaman; Hueglin, Christoph; Varrica, Daniela; Dongarra, Gaetano; Cohen, David D.; Smichowski, Patricia; Gomez, Dario; Lambert, Fabrice; Barraza, Francisco; Bergametti, Gilles; Rodriguez, Sergio; Gonzalez-Ramos, Yenny; Hand, Jenny; Kyllonen, Katriina; Hakola, Hannele; Chuang, Patrick; Hopke, Philip K.; Harrison, Roy M.; Martin, Randall V.; Walsh, Brenna; Weagle, Crystal; Maenhaut, Willy; Morera-Gomez, Yasser; Chen, Yu-Cheng; Pierce, Jeffrey R.; Bond, Tami C.
    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.