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Measurement report: Bio-physicochemistry of tropical clouds at Maïdo (Réunion, Indian Ocean): overview of results from the BIO-MAÏDO campaign

Leriche, Maud ; Tulet, Pierre ; Deguillaume, Laurent ; Burnet, Frédéric ; Colomb, Aurélie ; Borbon, Agnès ; Jambert, Corinne ; Duflot, Valentin ; Houdier, Stéphan ; Jaffrezo, Jean-Luc ; Vaïtilingom, Mickaël ; Dominutti, Pamela ; Rocco, Manon ; Mouchel-Vallon, Camille ; Samira El Gdachi ; Brissy, Maxence ; Fathalli, Maroua ; Maury, Nicolas ; Verreyken, Bert ; Crist Amelynck ; Schoon, Niels ; Gros, Valérie ; Pichon, Jean-Marc ; Ribeiro, Mickael ; Pique, Eric ; Leclerc, Emmanuel ; Bourrianne, Thierry ; Roy, Axel ; Moulin, Eric ; Barrie, Joël ; Metzger, Jean-Marc ; Péris, Guillaume ; Guadagno, Christian ; Bhugwant, Chatrapatty ; Jean-Mathieu Tibere ; Tournigand, Arnaud ; Freney, Evelyn ; Sellegri, Karine ; Delort, Anne-Marie ; Amato, Pierre ; Joly, Muriel ; Baray, Jean-Luc ; Renard, Pascal ; Bianco, Angelica ; Réchou, Anne ; Payen, Guillaume

Atmospheric chemistry and physics, 2024-04, Vol.24 (7), p.4129-4155 [Periódico revisado por pares]

Katlenburg-Lindau: Copernicus GmbH

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Título:
Measurement report: Bio-physicochemistry of tropical clouds at Maïdo (Réunion, Indian Ocean): overview of results from the BIO-MAÏDO campaign
Autor: Leriche, Maud ; Tulet, Pierre ; Deguillaume, Laurent ; Burnet, Frédéric ; Colomb, Aurélie ; Borbon, Agnès ; Jambert, Corinne ; Duflot, Valentin ; Houdier, Stéphan ; Jaffrezo, Jean-Luc ; Vaïtilingom, Mickaël ; Dominutti, Pamela ; Rocco, Manon ; Mouchel-Vallon, Camille ; Samira El Gdachi ; Brissy, Maxence ; Fathalli, Maroua ; Maury, Nicolas ; Verreyken, Bert ; Crist Amelynck ; Schoon, Niels ; Gros, Valérie ; Pichon, Jean-Marc ; Ribeiro, Mickael ; Pique, Eric ; Leclerc, Emmanuel ; Bourrianne, Thierry ; Roy, Axel ; Moulin, Eric ; Barrie, Joël ; Metzger, Jean-Marc ; Péris, Guillaume ; Guadagno, Christian ; Bhugwant, Chatrapatty ; Jean-Mathieu Tibere ; Tournigand, Arnaud ; Freney, Evelyn ; Sellegri, Karine ; Delort, Anne-Marie ; Amato, Pierre ; Joly, Muriel ; Baray, Jean-Luc ; Renard, Pascal ; Bianco, Angelica ; Réchou, Anne ; Payen, Guillaume
Assuntos: Aerosols ; Air masses ; Air pollution ; Altitude ; Astronomical instruments ; Atmosphere ; Atmospheric aerosols ; Atmospheric and Oceanic Physics ; Bacteria ; Boundary layers ; Breezes ; Chemical composition ; Chemistry ; Cloud formation ; Cloud water ; Clouds ; Daytime ; Earth Sciences ; Fluxes ; Mass spectrometry ; Mass spectroscopy ; Meteorology ; Mixing ratio ; Observatories ; Organic compounds ; Organic matter ; Outdoor air quality ; Oxalic acid ; Oxidation ; Photochemicals ; Photochemistry ; Physicochemical properties ; Physics ; Receptors ; Sciences of the Universe ; Secondary aerosols ; Tracers ; Trade winds ; Tropical climate ; Tropical clouds ; Tropical environment ; Tropical environments ; Turbulent boundary layer ; Vegetation ; VOCs ; Volatile organic compounds
É parte de: Atmospheric chemistry and physics, 2024-04, Vol.24 (7), p.4129-4155
Descrição: The BIO-MAÏDO (Bio-physicochemistry of tropical clouds at Maïdo: processes and impacts on secondary organic aerosols formation) campaign was conducted from 13 March to 4 April 2019 on the tropical island of Réunion. The main objective of the project was to improve understanding of cloud impacts on the formation of secondary organic aerosols (SOA) from biogenic volatile organic compound (BVOC) precursors in a tropical environment. Instruments were deployed at five sites: a receptor site, Maïdo Observatory (MO) at 2165 m a.s.l. and four sites along the slope of the Maïdo mountain. Observations include measurements of volatile organic compounds (VOCs) and characterization of the physical, chemical and biological (bacterial diversity and culture-based approaches) properties of aerosols and cloud water. Turbulent parameters of the boundary layer, radiative fluxes and emissions fluxes of BVOCs from the surrounding vegetation were measured to help interpret observed chemical concentrations in the different phases. Dynamical analyses showed two preferred trajectory routes for air masses arriving at MO during the daytime. Both trajectories correspond to return branches of the trade winds associated with upslope thermal breezes, where air masses likely encountered cloud processing. The highest mixing ratios of oxygenated VOCs (OVOCs) were measured above the site located in the endemic forest and the highest contribution of OVOCs to total VOCs at MO. Chemical compositions of particles during daytime showed higher concentrations of oxalic acid, a tracer of cloud processing and photochemical aging, and a more oxidized organic aerosol at MO than at other sites. Approximately 20 % of the dissolved organic compounds were analyzed. Additional analyses by ultra-high-resolution mass spectrometry will explore the complexity of the missing cloud organic matter.
Editor: Katlenburg-Lindau: Copernicus GmbH
Idioma: Inglês

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Measurement report: Bio-physicochemistry of tropical clouds at Maïdo (Réunion, Indian Ocean): overview of results from the BIO-MAÏDO campaign

Katlenburg-Lindau: Copernicus GmbH

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