Inland Sea Spray Aerosol Transport and Incomplete Chloride Depletion: Varying Degrees of Reactive Processing Observed during SOAS
| Autor: | Paul B. Shepson, Alexander Laskin, Manelisi Victor Nhliziyo, Amy L. Bondy, Steven B. Bertman, Andrew P. Ault, Rebecca L. Craig, Bingbing Wang, Kerri A. Pratt |
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| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
chemistry.chemical_element Mineralogy 010501 environmental sciences Mole fraction 01 natural sciences Chloride Halogens Chlorides stomatognathic system medicine Environmental Chemistry Particle Size Air mass 0105 earth and related environmental sciences Aerosols Air Pollutants General Chemistry Sea spray Sulfur Trace gas Aerosol stomatognathic diseases chemistry Environmental chemistry Halogen Alabama medicine.drug |
| Zdroj: | Environmental Science & Technology. 51:9533-9542 |
| ISSN: | 1520-5851 0013-936X |
| Popis: | Multiphase reactions involving sea spray aerosol (SSA) impact trace gas budgets in coastal regions by acting as a reservoir for oxidized nitrogen and sulfur species, as well as being a source of halogen gases (HCl, ClNO2, etc.). Whereas most studies of multiphase reactions on SSA have focused on marine environments, far less is known about SSA transported inland. Herein, single-particle measurements of SSA are reported at a site >320 km from the Gulf of Mexico, with transport times of 7–68 h. Samples were collected during the Southern Oxidant and Aerosol Study (SOAS) in June–July 2013 near Centreville, Alabama. SSA was observed in 93% of 42 time periods analyzed. During two marine air mass periods, SSA represented significant number fractions of particles in the accumulation (0.2–1.0 μm, 11%) and coarse (1.0–10.0 μm, 35%) modes. Chloride content of SSA particles ranged from full to partial depletion, with 24% of SSA particles containing chloride (mole fraction of Cl/Na ≥ 0.1, 90% chloride depletion). Both... |
| Databáze: | OpenAIRE |
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