Anthropogenic perturbations to the atmospheric molybdenum cycle

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dc.contributor.authorWong, MYen_AU
dc.contributor.authorRathod, SDen_AU
dc.contributor.authorMarino, Ren_AU
dc.contributor.authorLi, LLen_AU
dc.contributor.authorHowarth, RWen_AU
dc.contributor.authorAlastuey, Aen_AU
dc.contributor.authorAlaimo, MGen_AU
dc.contributor.authorBarraza, Fen_AU
dc.contributor.authorCarneiro, MCen_AU
dc.contributor.authorChellam, Sen_AU
dc.contributor.authorChen, YCen_AU
dc.contributor.authorCohen, DDen_AU
dc.contributor.authorConnelly, Den_AU
dc.contributor.authorDongarra, Gen_AU
dc.contributor.authorGómez, Den_AU
dc.contributor.authorHand, JLen_AU
dc.contributor.authorHarrison, RMen_AU
dc.contributor.authorHopke, PKen_AU
dc.contributor.authorHueglin, cen_AU
dc.contributor.authorKuang, KWen_AU
dc.contributor.authorLambert, Fen_AU
dc.contributor.authorLiang, Jen_AU
dc.contributor.authorLosno, Ren_AU
dc.contributor.authorMaenhaut, Wen_AU
dc.contributor.authorMilando, Cen_AU
dc.contributor.authorMonteiro, MICen_AU
dc.contributor.authorMorera-Gómez, Yen_AU
dc.contributor.authorRodríguez, Sen_AU
dc.contributor.authorQuerol, Xen_AU
dc.contributor.authorSmichowski, Pen_AU
dc.contributor.authorVarrica, Den_AU
dc.contributor.authorXiao, YHen_AU
dc.contributor.authorXu, YJen_AU
dc.contributor.authorMahowald, NMen_AU
dc.date.accessioned2022-02-24T05:32:09Zen_AU
dc.date.available2022-02-24T05:32:09Zen_AU
dc.date.issued2021-01-28en_AU
dc.date.statistics2022-02-03en_AU
dc.descriptionData from: Anthropogenic Perturbations to the Atmospheric Molybdenum Cycle is available from Open Scholarship at Cornell at this URL: https://ecommons.cornell.edu/handle/1813/70169. Accessibility is under Creative Commons.en_AU
dc.description.abstractMolybdenum (Mo) is a key cofactor in enzymes used for nitrogen (N) fixation and nitrate reduction, and the low availability of Mo can constrain N inputs, affecting ecosystem productivity. Natural atmospheric Mo aerosolization and deposition from sources such as desert dust, sea-salt spray, and volcanoes can affect ecosystem function across long timescales, but anthropogenic activities such as combustion, motor vehicles, and agricultural dust have accelerated the natural Mo cycle. Here we combined a synthesis of global atmospheric concentration observations and modeling to identify and estimate anthropogenic sources of atmospheric Mo. To project the impact of atmospheric Mo on terrestrial ecosystems, we synthesized soil Mo data and estimated the global distribution of soil Mo using two approaches to calculate turnover times. We estimated global emissions of atmospheric Mo in aerosols (<10 μm in diameter) to be 23 Gg Mo yr−1, with 40%–75% from anthropogenic sources. We approximated that for the top meter of soil, Mo turnover times range between 1,000 and 1,000,000 years. In some industrialized regions, anthropogenic inputs have enhanced Mo deposition 100-fold, lowering the soil Mo turnover time considerably. Our synthesis of global observational data, modeling, and a mass balance comparison with riverine Mo exports suggest that anthropogenic activity has greatly accelerated the Mo cycle, with potential to influence N-limited ecosystems. © 2022 American Geophysical Unionen_AU
dc.description.sponsorshipWe acknowledge the Atkinson Center for funding for this project, and NSF CCF-1522054.en_AU
dc.identifier.articlenumbere2020GB006787en_AU
dc.identifier.citationWong, M. Y., Rathod, S. D., Marino, R., Li, L., Howarth, R. W., Alastuey, A., Alaimo, M, G., Barraza, F., Carneiro, M. C., Chellam, S., Chen, Y.-C., Cohen, D. D., Connelly, D., Dongarra, G., Gómez, D., Hand, J., Harrison, R. M., Hopke, P. K., Hueglin, C., Kuang, Y.-W., Lambert, F., Liang, J., Losno, R., Maenhaut, W., Milando, C., Monteiro, M, I. C., Morera-Gómez, Y., Querol, X., Rodríguez, S., Smichowski, P., Varrica, D., Xiao, Y.-H., Xu, Y., & Mahowald, N. M. (2021). Anthropogenic perturbations to the atmospheric molybdenum cycle. Global Biogeochemical Cycles, 35(2), e2020GB006787. doi:10.1029/2020GB006787en_AU
dc.identifier.issn0886-6236en_AU
dc.identifier.issue2en_AU
dc.identifier.journaltitleGlobal Biogeochemical Cyclesen_AU
dc.identifier.urihttps://doi.org/10.1029/2020GB006787en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12860en_AU
dc.identifier.volume35en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Unionen_AU
dc.subjectMolybdenumen_AU
dc.subjectAtmospheresen_AU
dc.subjectEnzymesen_AU
dc.subjectNitrogenen_AU
dc.subjectEcosystemsen_AU
dc.subjectNitratesen_AU
dc.subjectDustsen_AU
dc.subjectSaltsen_AU
dc.subjectVolcanoesen_AU
dc.subjectCombustionen_AU
dc.subjectDataen_AU
dc.titleAnthropogenic perturbations to the atmospheric molybdenum cycleen_AU
dc.typeJournal Articleen_AU
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