Počet záznamů: 1
Aerosol Particle Shrinkage Event Phenomenology in a South European Suburban Area during 2009-2015.
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SYSNO ASEP 0507109 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Aerosol Particle Shrinkage Event Phenomenology in a South European Suburban Area during 2009-2015. Tvůrce(i) Alonso-Blanco, E. (ES)
Gomez-Moreno, F.J. (ES)
Nunez, L. (ES)
Pujadas, M. (ES)
Cusack, Michael (UCHP-M) ORCID, RID, SAI
Artinano, B. (ES)Zdroj.dok. Atmospheric Environment. - : Elsevier - ISSN 1352-2310
Roč. 160, JUL 2017 (2017), s. 154-164Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova aerosol particle shrinkage events ; aerosol particle size ; aerosol dynamics Vědní obor RIV DI - Znečištění a kontrola vzduchu Obor OECD Environmental sciences (social aspects to be 5.7) Způsob publikování Omezený přístup Institucionální podpora UCHP-M - RVO:67985858 UT WOS 000402349900016 EID SCOPUS 85018768770 DOI 10.1016/j.atmosenv.2017.04.013 Anotace A high number of aerosol particle shrinkage cases (70) have been identified and analyzed from an extensive and representative database of aerosol size distributions obtained between 2009 and 2015 at an urban background site in Madrid (Spain). A descriptive classification based on the process from which the shrinkage began is proposed according which shrinkage events were divided into three groups: (1) NPF + shrinkage (NPF + S) events, (2) aerosol particle growth process + shrinkage (G + S) events, and (3) pure shrinkage (S) events. The largest number of shrinkages corresponded to the S-type followed by NPF + S, while the G + S events were the least frequent group recorded. Duration of shrinkages varied widely from 0.75 to 8.5 h and SR from -1.0 to -11.1 nm h(-1). These processes typically occurred in the afternoon, around 18:00 UTC, caused by two situations: i) a wind speed increase usually associated with a change in the wind direction (over 60% of the observations) and ii) the reduction of photochemical activity at the end of the day. All shrinkages were detected during the warm period, mainly between May and August, when local meteorological conditions (high solar irradiance and temperature and low relative humidity), atmospheric processes (high photochemical activity) and availability of aerosol forming precursors were favorable for their development. As a consequence of these processes, the particles concentration corresponding to the Aitken mode decreased into the nucleation mode. The accumulation mode did not undergo significant changes during these processes. In some cases, a dilution of the particulate content in the ambient air was observed. This work, goes further than others works dealing with aerosol particles shrinkages, as it incorporates as a main novelty a classification methodology for studying these processes. Moreover, compared to other studies, it is supported by a high and representative number of observations. Thus, this study contributes to get a better understanding of this type of atmospheric aerosol transformations and its features. Pracoviště Ústav chemických procesů Kontakt Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Rok sběru 2020 Elektronická adresa http://hdl.handle.net/11104/0298177
Počet záznamů: 1