title: Assessing the Dynamics of Organic Aerosols over the North Atlantic Ocean.
abstract: The influence of aerosols on climate is highly dependent on the particle size distribution, concentration, and composition. In particular, the latter influences their ability to act as cloud condensation nuclei, whereby they impact cloud coverage and precipitation. Here, we simultaneously measured the concentration of aerosols from sea spray over the North Atlantic on board the exhaust-free solar-powered vessel "PlanetSolar", and the sea surface physico-chemical parameters. We identified organic-bearing particles based on individual particle fluorescence spectra. Organic-bearing aerosols display specific spatio-temporal distributions as compared to total aerosols. We propose an empirical parameterization of the organic-bearing particle concentration, with a dependence on water salinity and sea-surface temperature only. We also show that a very rich mixture of organic aerosols is emitted from the sea surface. Such data will certainly contribute to providing further insight into the influence of aerosols on cloud formation, and be used as input for the improved modeling of aerosols and their role in global climate processes.
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.
authors.forename: Jérôme
authors.initials: J
authors.lastname: Kasparian
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.|Université de Genève, Department F.-A. Forel for Environmental and Aquatic Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Christel
authors.initials: C
authors.lastname: Hassler
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.|Université de Genève, Department F.-A. Forel for Environmental and Aquatic Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Bas
authors.initials: B
authors.lastname: Ibelings
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Berti
authors.affiliation: Woods Hole Oceanic Institute, 86 Water St, Woods Hole, MA 02543, USA.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Bigorre
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Violeta
authors.initials: V
authors.lastname: Djambazova
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Elena
authors.initials: E
authors.lastname: Gascon-Diez
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Grégory
authors.initials: G
authors.lastname: Giuliani
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.
authors.forename: Raphaël
authors.initials: R
authors.lastname: Houlmann
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.
authors.forename: Denis
authors.initials: D
authors.lastname: Kiselev
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Pierric
authors.initials: P
authors.lastname: de Laborie
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.|Université de Genève, Department F.-A. Forel for Environmental and Aquatic Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Anh-Dao
authors.initials: AD
authors.lastname: Le
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.
authors.forename: Thibaud
authors.initials: T
authors.lastname: Magouroux
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Tristan
authors.initials: T
authors.lastname: Neri
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.|Université de Genève, Department F.-A. Forel for Environmental and Aquatic Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Daniel
authors.initials: D
authors.lastname: Palomino
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Stéfanie
authors.initials: S
authors.lastname: Pfändler
authors.affiliation: Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Nicolas
authors.initials: N
authors.lastname: Ray
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.
authors.forename: Gustavo
authors.initials: G
authors.lastname: Sousa
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.|TIBIO SagL, via alla Valle I I, 6949, Switzerland.
authors.forename: Davide
authors.initials: D
authors.lastname: Staedler
authors.affiliation: TIBIO SagL, via alla Valle I I, 6949, Switzerland.
authors.forename: Federico
authors.initials: F
authors.lastname: Tettamanti
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Wolf
authors.affiliation: Université de Genève, Group of Applied Physics, Chemin de Pinchat 22, CH1211 Geneva 4, Switzerland.|Université de Genève, Institute for Environmental Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.|Université de Genève, Department F.-A. Forel for Environmental and Aquatic Sciences, 66 Boulevard Carl Vogt, CH 1211 Geneva 4, Switzerland.
authors.forename: Martin
authors.initials: M
authors.lastname: Beniston