Scavenging of sea-salt aerosols by rain events over Arabian Sea during ARMEX |
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| Institution: | 2. Institute for Radiological Protection and Nuclear Safety (IRSN), LMRE, Bâtiment 501, Bois des Rames, Orsay 91400, France;3. Institute of Atmospheric Sciences and Climate (ISAC—CNR), Via Gobetti 101, 40129 Bologna, Italy;4. Laboratoire de Météorologie Physique, Observatoire de Physique du Globe de Clermont-Ferrand, Université Blaise Pascal—CNRS, 24 avenue des Landais, 63 177 Aubière cedex, France;1. Aryabhatta Research Institute of Observational Sciences (ARIES), Nainital, India;2. Department of Civil Engineering, Indian Institute of Technology, Kanpur, India;3. Center for Environmental Science and Engineering, Indian Institute of Technology, Kanpur, India;4. Department of Physics, School of Natural Sciences, Shiv Nadar University, India;1. Department of Atmospheric Sciences, Yonsei University, Seoul 120-749, Republic of Korea;2. Environmental and Climate Sciences Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA;3. CMA Key Laboratory for Aerosol-Cloud-Precipitation, Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology (NUIST), Nanjing, Jiangsu, China;1. Distributed and Parallel Systems Group, Institute for Computer Science, University of Innsbruck, Technikerstr. 21a, A-6020 Innsbruck, Austria;2. Faculty of Computer Science and Engineering, Ss. Cyril and Methodius University in Skopje, 1000 Skopje, Macedonia;3. Institute of Information Technology, University of Klagenfurt, Universitätsstr. 65-67, 9020 Klagenfurt, Austria |
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| Abstract: | Scavenging coefficients are obtained for sea-salt particles at rainfall intensity of 5, 10, 15, 20 and 45 mm h?1. Evolutions of size distributions for sea-salt particles by precipitation scavenging are simulated using theoretically estimated scavenging coefficients. Results indicate that below-cloud scavenging affects mainly sea-salt particles in coarse mode. Observed concentrations of Na+ and Cl? in rainwater increased with rainfall intensity and aerosol size. Comparison of predicted concentrations of Na+ and Cl? in rainwater with observed ionic concentrations of short-timed wet-only samples collected during rain events on 2 August 2002 over Arabian Sea (ARMEX-2002) supports the model result. |
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