A major combustion aerosol event had a negligible impact on the atmospheric ice‐nucleating particle population
| العنوان: | A major combustion aerosol event had a negligible impact on the atmospheric ice‐nucleating particle population |
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| المؤلفون: | Jung-uk Shim, James B. McQuaid, Alexander D. Harrison, Mark D. Tarn, Michael P. Adams, Sebastien N. F. Sikora, Ian T. Burke, Martin I. Daily, Mark A. Holden, Federico Carotenuto, Jesus Vergara-Temprado, Benjamin J. Murray, Daniel O'Sullivan, Thomas F. Whale, Alberto Sanchez-Marroquin, Zhiqiang Cui, Grace C. E. Porter |
| المصدر: | BASE-Bielefeld Academic Search Engine Journal of Geophysical Research: Atmospheres, 125 (22) Journal of Geophysical Research: Atmospheres |
| بيانات النشر: | AGU, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Atmospheric Science, 010504 meteorology & atmospheric sciences, Population, F764, Combustion, Atmospheric sciences, medicine.disease_cause, 01 natural sciences, Earth and Planetary Sciences (miscellaneous), medicine, Mass concentration (chemistry), education, 0105 earth and related environmental sciences, education.field_of_study, F331, F750, Radiative forcing, Soot, Aerosol, Geophysics, 13. Climate action, Space and Planetary Science, Ice nucleus, Particle, Environmental science, F170 |
| الوصف: | Clouds containing supercooled water are important for both climate and weather, but our knowledge of which aerosol particle types nucleate ice in these clouds is far from complete. Combustion aerosols have strong anthropogenic sources, and if these aerosol types were to nucleate ice in clouds, they might exert a climate forcing. Here, we quantified the atmospheric ice‐nucleating particle (INP) concentrations during the United Kingdom's annual Bonfire Night celebrations, which are characterized by large amounts of combustion aerosol from bonfires and fireworks. We used three immersion mode techniques covering more than 6 orders of magnitude in INP concentration over the temperature range from −10°C to homogeneous freezing. We found no observable systematic change in the INP concentration on three separate nights, despite more than a factor of 10 increase in aerosol number concentrations, up to a factor of 10 increase in PM10 concentration, and more than a factor of 100 increase in black carbon (BC) mass concentration relative to pre‐event levels. This implies that BC and other combustion aerosol such as ash did not compete with the INPs present in the background air. Furthermore, the upper limit of the ice‐active site surface density, ns(T), of BC generated in these events was shown to be consistent with several other recent laboratory studies, showing a very low ice‐nucleating activity of BC. We conclude that combustion aerosol particles similar to those emitted on Bonfire Night are at most of secondary importance for the INP population relevant for mixed‐phase clouds in typical midlatitude terrestrial locations. © 2020 American Geophysical Union. ISSN:0148-0227 ISSN:2169-897X |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0148-0227 2169-897X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9d1b1f24b05ee2bad4fba87240bc0a3Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c9d1b1f24b05ee2bad4fba87240bc0a3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 01480227 2169897X |
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