The role of the atmospheric electric field in the dust‐lifting process
| Autor: | Gian Gabriele Ori, Kamal Taj-Eddine, Francesca Esposito, Simone Silvestro, R. Molinaro, G. Di Achille, Laurent Marty, Cesare Molfese, Gabriele Franzese, Ciprian Ionut Popa, Fabio Cozzolino |
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| Přispěvatelé: | ITA, MAR |
| Rok vydání: | 2016 |
| Předmět: |
010504 meteorology & atmospheric sciences
Meteorology Humidity Climate change Astrophysics::Cosmology and Extragalactic Astrophysics Radiative forcing Mineral dust Atmospheric sciences 01 natural sciences Aerosol Geophysics Electric field 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics General Earth and Planetary Sciences Environmental science Aeolian processes Relative humidity Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Physics::Atmospheric and Oceanic Physics 0105 earth and related environmental sciences |
| Zdroj: | Geophysical Research Letters. 43:5501-5508 |
| ISSN: | 1944-8007 0094-8276 |
| DOI: | 10.1002/2016gl068463 |
| Popis: | Mineral dust particles represent the most abundant component of atmospheric aerosol in terms of dry mass. They play a key role in climate and climate change, so the study of their emission processes is of utmost importance. Measurements of dust emission into the atmosphere are scarce, so that the dust load is generally estimated using models. It is known that the emission process can generate strong atmospheric electric fields. Starting from the data we acquired in the Sahara desert, here, we show for the first time that depending on the relative humidity conditions, electric fields contribute to increase up to a factor of 10 the amount of particles emitted into the atmosphere. This means that electrical forces and humidity are critical quantities in the dust emission process and should be taken into account in climate and circulation models to obtain more realistic estimations of the dust load in the atmosphere. |
| Databáze: | OpenAIRE |
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