Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ?
SSCI-VIDE+ATARI+VGE:BNO:LFI International audience Clouds are essential components of the Earth’s hydrological system and the main cooling factor of the climate budget. But some aspects of their formation are still not completely understood, in particular the role of surfactants (Boucher et al., 201...
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fttriple:oai:gotriple.eu:10670/1.ypfg57 2023-05-15T17:42:24+02:00 Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ? Gerard, V. Noziere, B. Asmi, E. Lihavainen, H. Kivekäs, N. Aurela, M. Brus, D. Fine, L. Frossard, A.A. Cohen, R. C. IRCELYON-Approches thermodynamiques, analytiques et réactionnelles intégrées (ATARI) Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC) Tours , France 2016-09-04 https://hal.archives-ouvertes.fr/hal-01364529 en eng HAL CCSD hal-01364529 10670/1.ypfg57 https://hal.archives-ouvertes.fr/hal-01364529 undefined Hyper Article en Ligne - Sciences de l'Homme et de la Société European Aerosol Conference, EAC 2016 European Aerosol Conference, EAC 2016, Sep 2016, Tours France geo envir Conference Output https://vocabularies.coar-repositories.org/resource_types/c_c94f/ 2016 fttriple 2023-01-22T16:35:09Z SSCI-VIDE+ATARI+VGE:BNO:LFI International audience Clouds are essential components of the Earth’s hydrological system and the main cooling factor of the climate budget. But some aspects of their formation are still not completely understood, in particular the role of surfactants (Boucher et al., 2013). Although Köhler theory predicts that surfactants should enhance cloud droplet activation, current models consider their role to be negligible (Farmer et al., 2015), and the surface tension of growing droplets is systematically assumed to be that of pure water.Recent studies are starting to bring the evidence of the contrary, especially in laboratory experiments (Asa-Awuku et al., 2008; Ruehl et al., 2012; Giordano et al., 2013: Ruehl et al., 2014; 2016). In addition, the presence of strong surfactants, corresponding to surface tensions below 40 mN m-1, has been evidenced in atmospheric aerosols from many different regions (Ekström et al., 2010; Baduel et al., 2012). In a recent study, the concentration of surfactants in PM2.5 aerosols from a coastal region was found to be large enough to decrease the surface tension of the droplets until they reach activation (Gérard et al., 2016).It is thus now important to look for evidence of the role of surfactants on cloud droplet formation directly in the atmosphere (Nozière, 2016). For this, the surfactants present in PM1 aerosols at the GAW station Sammaltunturi, in Northern Finland (67°58'N 24°07'E, 565 m asl), a site directly impacted by the formation of orographic clouds (Lihavainen et al., 2008; Anttila et al., 2012), were extracted and analyzed from April to November 2015. The PM1 aerosols were collected with a frequency of 24 hours on quartz-filters. The total surfactant fraction was extracted with a double extraction method (Gérard et al. 2016): a water extraction followed by a Solid Phase Extraction (SPE) removing interferents and concentrating the surfactants. The surface tension curves of the aerosol surfactants were determined with the pendant drop technique ... Other/Unknown Material Northern Finland Unknown Anttila ENVELOPE(26.374,26.374,69.849,69.849) Sammaltunturi ENVELOPE(24.119,24.119,67.967,67.967) |
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geo envir Gerard, V. Noziere, B. Asmi, E. Lihavainen, H. Kivekäs, N. Aurela, M. Brus, D. Fine, L. Frossard, A.A. Cohen, R. C. Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ? |
topic_facet |
geo envir |
description |
SSCI-VIDE+ATARI+VGE:BNO:LFI International audience Clouds are essential components of the Earth’s hydrological system and the main cooling factor of the climate budget. But some aspects of their formation are still not completely understood, in particular the role of surfactants (Boucher et al., 2013). Although Köhler theory predicts that surfactants should enhance cloud droplet activation, current models consider their role to be negligible (Farmer et al., 2015), and the surface tension of growing droplets is systematically assumed to be that of pure water.Recent studies are starting to bring the evidence of the contrary, especially in laboratory experiments (Asa-Awuku et al., 2008; Ruehl et al., 2012; Giordano et al., 2013: Ruehl et al., 2014; 2016). In addition, the presence of strong surfactants, corresponding to surface tensions below 40 mN m-1, has been evidenced in atmospheric aerosols from many different regions (Ekström et al., 2010; Baduel et al., 2012). In a recent study, the concentration of surfactants in PM2.5 aerosols from a coastal region was found to be large enough to decrease the surface tension of the droplets until they reach activation (Gérard et al., 2016).It is thus now important to look for evidence of the role of surfactants on cloud droplet formation directly in the atmosphere (Nozière, 2016). For this, the surfactants present in PM1 aerosols at the GAW station Sammaltunturi, in Northern Finland (67°58'N 24°07'E, 565 m asl), a site directly impacted by the formation of orographic clouds (Lihavainen et al., 2008; Anttila et al., 2012), were extracted and analyzed from April to November 2015. The PM1 aerosols were collected with a frequency of 24 hours on quartz-filters. The total surfactant fraction was extracted with a double extraction method (Gérard et al. 2016): a water extraction followed by a Solid Phase Extraction (SPE) removing interferents and concentrating the surfactants. The surface tension curves of the aerosol surfactants were determined with the pendant drop technique ... |
author2 |
IRCELYON-Approches thermodynamiques, analytiques et réactionnelles intégrées (ATARI) Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON) Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL) Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC) |
format |
Other/Unknown Material |
author |
Gerard, V. Noziere, B. Asmi, E. Lihavainen, H. Kivekäs, N. Aurela, M. Brus, D. Fine, L. Frossard, A.A. Cohen, R. C. |
author_facet |
Gerard, V. Noziere, B. Asmi, E. Lihavainen, H. Kivekäs, N. Aurela, M. Brus, D. Fine, L. Frossard, A.A. Cohen, R. C. |
author_sort |
Gerard, V. |
title |
Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ? |
title_short |
Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ? |
title_full |
Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ? |
title_fullStr |
Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ? |
title_full_unstemmed |
Surfactants in PM1 aerosols from boreal Northern Finland: importance for cloud droplet formation ? |
title_sort |
surfactants in pm1 aerosols from boreal northern finland: importance for cloud droplet formation ? |
publisher |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-01364529 |
op_coverage |
Tours , France |
long_lat |
ENVELOPE(26.374,26.374,69.849,69.849) ENVELOPE(24.119,24.119,67.967,67.967) |
geographic |
Anttila Sammaltunturi |
geographic_facet |
Anttila Sammaltunturi |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Hyper Article en Ligne - Sciences de l'Homme et de la Société European Aerosol Conference, EAC 2016 European Aerosol Conference, EAC 2016, Sep 2016, Tours France |
op_relation |
hal-01364529 10670/1.ypfg57 https://hal.archives-ouvertes.fr/hal-01364529 |
op_rights |
undefined |
_version_ |
1766144261914361856 |