Publication Abstracts
Mahowald et al. 2026
Mahowald, N.M., L. Li, M. Gonçalves Ageitos, , C. Pérez García-Pando, P. Ginoux, V. Obiso, P.G. Brodrick, R.N. Clark, K. Desboeufs, R.O. Green, G.S. Okin, D.R. Thompson, S. Rathod, E. Gazel, A. Hornby, E. Journet, M.G. Alaimo, C. Alves, A. Alastuey, P. Artaxo, A.R. Baker, F. Barraza, S. Becagli, C.S. Buck, G. Calzolai, S. Chellam, Y. Chen, P.Y. Chuang, D.D. Cohen, C. Colombi, E. Diapouli, G. Dongarra, K. Eleftheriadis, J.P. Engelbrecht, C. Galy-Lacaux, C. Gaston, D. Gomez, Y. González Ramos, J. Hand, R.M. Harrison, B. Herut, P.K. Hopke, Z. Kertesz, K. Kyllönen, F. Lambert, W.M. Landing, R. Losno, F. Lucarelli, W. Maenhaut, C. Marsay, H. Matsui, R.V. Martin, Y. Morera-Gómez, A. Paytan, J. Prospero, S. Rodríguez, G. Sarthou, R. Shelley, R.L. Siefert, P. Smichowski, and D. Varrica, 2026: Global model estimates of atmospheric Al, Ca, Fe, Si, and Ti from dust and non-dust aerosols informed by EMIT surface mineralogy and evaluated against observations. Glob. Biogeochem. Cycles, 40, no. 5, e2025GB009033, doi:10.1029/2025GB009033.
Atmospheric deposition of micro-nutrients like Fe has been shown to be important for ocean biogeochemistry. The largest source of atmospheric Fe and other elements (e.g., Ca, Al, Si, and Ti) is desert dust, although there are significant non-dust sources in some regions (e.g., combustion, sea salts, volcanoes). However, past estimates of these elements have been substantially uncertain due to limited information about the composition of the desert source regions. Here we use elemental distributions estimated from new Earth Surface Mineral Dust Source Investigation (EMIT) observations, which provide mineralogical composition at the surface of the Earth based on imaging spectroscopy measurements from the International Space Station. We focus on total elemental amounts, not on the soluble fraction. We add in other sources of these elements (anthropogenic and natural) and compare to a compilation of available surface concentration data from stations over land and from shipborne observations. The combined observational and model synthesis provides new information about the distribution and deposition of these elements. Our results suggest that the modeled distribution is similar to available observations, but discrepancies still exist in both natural desert dust regions as well as regions dominated by anthropogenic sources. Comparisons between the model estimated Ca/Al ratios and observations in some dust dominated regions suggest an underestimate of Ca/Al ratios. Global budgets for Ca, Al, Fe, Si, and Ti suggest that desert dust remains the dominant source, although volcanic and anthropogenic contributions are important in some regions. Changes in elemental distributions since preindustrial times were also estimated.
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BibTeX Citation
@article{ma02910k,
author={Mahowald, N. M. and Li, L. and Gonçalves Ageitos, M. and Miller, R. L. and Pérez García-Pando, C. and Ginoux, P. and Obiso, V. and Brodrick, P. G. and Clark, R. N. and Desboeufs, K. and Green, R. O. and Okin, G. S. and Thompson, D. R. and Rathod, S. and Gazel, E. and Hornby, A. and Journet, E. and Alaimo, M. G. and Alves, C. and Alastuey, A. and Artaxo, P. and Baker, A. R. and Barraza, F. and Becagli, S. and Buck, C. S. and Calzolai, G. and Chellam, S. and Chen, Y. and Chuang, P. Y. and Cohen, D. D. and Colombi, C. and Diapouli, E. and Dongarra, G. and Eleftheriadis, K. and Engelbrecht, J. P. and Galy-Lacaux, C. and Gaston, C. and Gomez, D. and González Ramos, Y. and Hand, J. and Harrison, R. M. and Herut, B. and Hopke, P. K. and Kertesz, Z. and Kyllönen, K. and Lambert, F. and Landing, W. M. and Losno, R. and Lucarelli, F. and Maenhaut, W. and Marsay, C. and Matsui, H. and Martin, R. V. and Morera-Gómez, Y. and Paytan, A. and Prospero, J. and Rodríguez, S. and Sarthou, G. and Shelley, R. and Siefert, R. L. and Smichowski, P. and Varrica, D.},
title={Global model estimates of atmospheric Al, Ca, Fe, Si, and Ti from dust and non-dust aerosols informed by EMIT surface mineralogy and evaluated against observations},
year={2026},
journal={Global Biogeochemical Cycles},
volume={40},
number={5},
pages={e2025GB009033},
doi={10.1029/2025GB009033},
}
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RIS Citation
TY - JOUR ID - ma02910k AU - Mahowald, N. M. AU - Li, L. AU - Gonçalves Ageitos, M. AU - Miller, R. L. AU - Pérez García-Pando, C. AU - Ginoux, P. AU - Obiso, V. AU - Brodrick, P. G. AU - Clark, R. N. AU - Desboeufs, K. AU - Green, R. O. AU - Okin, G. S. AU - Thompson, D. R. AU - Rathod, S. AU - Gazel, E. AU - Hornby, A. AU - Journet, E. AU - Alaimo, M. G. AU - Alves, C. AU - Alastuey, A. AU - Artaxo, P. AU - Baker, A. R. AU - Barraza, F. AU - Becagli, S. AU - Buck, C. S. AU - Calzolai, G. AU - Chellam, S. AU - Chen, Y. AU - Chuang, P. Y. AU - Cohen, D. D. AU - Colombi, C. AU - Diapouli, E. AU - Dongarra, G. AU - Eleftheriadis, K. AU - Engelbrecht, J. P. AU - Galy-Lacaux, C. AU - Gaston, C. AU - Gomez, D. AU - González Ramos, Y. AU - Hand, J. AU - Harrison, R. M. AU - Herut, B. AU - Hopke, P. K. AU - Kertesz, Z. AU - Kyllönen, K. AU - Lambert, F. AU - Landing, W. M. AU - Losno, R. AU - Lucarelli, F. AU - Maenhaut, W. AU - Marsay, C. AU - Matsui, H. AU - Martin, R. V. AU - Morera-Gómez, Y. AU - Paytan, A. AU - Prospero, J. AU - Rodríguez, S. AU - Sarthou, G. AU - Shelley, R. AU - Siefert, R. L. AU - Smichowski, P. AU - Varrica, D. PY - 2026 TI - Global model estimates of atmospheric Al, Ca, Fe, Si, and Ti from dust and non-dust aerosols informed by EMIT surface mineralogy and evaluated against observations JA - Glob. Biogeochem. Cycles JO - Global Biogeochemical Cycles VL - 40 IS - 5 SP - e2025GB009033 DO - 10.1029/2025GB009033 ER -
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