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A global analysis of climate-relevant aerosol properties retrieved from the network of Global Atmosphere Watch (GAW) near-surface observatories

Paolo Laj 1, 2, 3, * Alessandro Bigi 4 Clémence Rose 5 Elisabeth Andrews 6, 7 Cathrine Lund Myhre 8 Martine Coen 9 Yong Lin 8 Alfred Wiedensohler 10 Michael Schulz 11 John Ogren Markus Fiebig 8 Jonas Gliß Augustin Mortier 11 Marco Pandolfi 12 Tuukka Petäjä 13 Sang-Woo Kim 14 Wenche Aas 8 Jean-Philippe Putaud 15 Olga Mayol-Bracero Melita Keywood Lorenzo Labrador Pasi Aalto Erik Ahlberg Lucas Arboledas Andrés Alastuey Marcos Andrade 16 Begona Artinano 17 Stina Ausmeel Todor Arsov Eija Asmi 18 John Backman Urs Baltensperger 19 Susanne Bastian Olaf Bath Johan Beukes Benjamin Brem Nicolas Bukowiecki 20 Sébastien Conil 21 Cedric Couret Derek Day Wan Dayantolis Anna Degorska 22 Konstantinos Eleftheriadis 23 Prodromos Fetfatzis 24 Olivier Favez 25 Harald Flentje 26 Maria Gini 27 Asta Gregorič Martin Gysel-Beer A Hallar Jenny Hand Andras Hoffer Christoph Hueglin 28 Rakesh Hooda Antti Hyvärinen 29 Ivo Kalapov 30 Nikos Kalivitis 31 Anne Kasper-Giebl 32 Jeong Kim Giorgos Kouvarakis 33 Irena Kranjc Radovan Krejci 34 Markku Kulmala Casper Labuschagne 35 Hae-Jung Lee Heikki Lihavainen 18 Neng-Huei Lin Gunter Löschau Krista Luoma Angela Marinoni Sebastiao Martins 36 Dos Santos Frank Meinhardt Maik Merkel Jean-Marc Metzger 37 Nikolaos Mihalopoulos 38 Nhat Nguyen Jakub Ondracek Noemi Pérez Maria Perrone Jean-Eudes Petit 39 David Picard 5 Jean-Marc Pichon 5 Véronique Pont 40 Natalia Prats Anthony Prenni Fabienne Reisen Salvatore Romano Karine Sellegri Sangeeta Sharma 41 Gerhard Schauer Patrick Sheridan James Sherman Maik Schütze Andreas Schwerin Ralf Sohmer Martin Steinbacher 28 Junying Sun Gloria Titos Barbara Toczko Thomas Tuch Pierre Tulet 42 Peter Tunved 43 Ville Vakkari Fernando Velarde 16 Patricio Velasquez Paolo Villani Sterios Vratolis 23 Sheng-Hsiang Wang Kay Weinhold Rolf Weller 44 Margarita Yela 45 Jesus Yus-Diez Vladimir Zdimal Paul Zieger 46 Nadezda Zikova
* Corresponding author
Abstract : Aerosol particles are essential constituents of the Earth's atmosphere, impacting the earth radiation balance directly by scattering and absorbing solar radiation, and indirectly by acting as cloud condensation nuclei. In contrast to most greenhouse gases, aerosol particles have short atmospheric residence times, resulting in a highly heterogeneous distribution in space and time. There is a clear need to document this variability at regional scale through observations involving, in particular, the in situ near-surface segment of the atmospheric observation system. This paper will provide the widest effort so far to document variability of climate-relevant in situ aerosol properties (namely wavelength dependent particle light scattering and absorption coefficients, particle number concentration and particle number size distribution) from all sites connected to the Global Atmosphere Watch network. High-quality data from almost 90 stations worldwide have been collected and controlled for quality and are reported for a reference year in 2017, providing a very extended and robust view of the variability of these variables worldwide. The range of variability observed worldwide for light scattering and absorption coefficients, single-scattering albedo, and particle number concentration are presented together with preliminary information on their long-term trends and comparison with model simulation for the different stations. The scope of the present paper is also to provide the necessary suite of information, including data provision procedures, quality control and analysis, data policy, and usage of the ground-based aerosol measurement network. It delivers to users of the World Data Centre on Aerosol, the required confidence in data products in the form of a fully characterized value chain, including uncertainty estimation and requirements for contributing to the global climate monitoring system.
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Paolo Laj, Alessandro Bigi, Clémence Rose, Elisabeth Andrews, Cathrine Lund Myhre, et al.. A global analysis of climate-relevant aerosol properties retrieved from the network of Global Atmosphere Watch (GAW) near-surface observatories. Atmospheric Measurement Techniques, European Geosciences Union, 2020, 13, pp.4353 - 4392. ⟨10.5194/amt-13-4353-2020⟩. ⟨hal-02923802⟩

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