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Aerosol characterisation in the subtropical eastern North Atlantic region using long-term AERONET measurements
Title: Aerosol characterisation in the subtropical eastern North Atlantic region using long-term AERONET measurements
Authors: Barreto Velasco, África ORCID RESEARCHERID SCOPUSID Autor AEMETGarcía Cabrera, Rosa Delia ORCID RESEARCHERID Guirado-Fuentes, Carmen ORCID RESEARCHERID Autor AEMETCuevas Agulló, Emilio ORCID RESEARCHERID SCOPUSID Autor AEMETAlmansa Rodríguez, Antonio FernandoAutor AEMETMilford, Celia RESEARCHERID Toledano, CarlosExpósito González, Francisco JavierDíaz González, Juan PedroLeón-Luis, Sergio FabiánAutor AEMET
Keywords: Atmospheric aerosols; Aerosol Robotic NETwork; Photometric observations; Impact climate
Issue Date: 2022
Publisher: European Geosciences Union; Copernicus Publications
Citation: Atmospheric Chemistry and Physics. 2022, 22, p. 11105–11124
Publisher version:
Abstract: A comprehensive characterisation of atmospheric aerosols in the subtropical eastern North Atlantic has been carried out using long-term ground-based Aerosol Robotic NETwork (AERONET) photometric observations over the period 2005–2020 from a unique network made up of four stations strategically located from sea level to 3555 m on the island of Tenerife. This site can be considered a sentinel for the passage of airmasses going to Europe from Africa, and therefore the aerosol characterisation performed here adds important information for analysing their evolution during their path toward Northern Europe. Two of these stations (Santa Cruz de Tenerife – SCO – at sea level and La Laguna – LLO – at 580 m a.s.l.) are located within the marine atmospheric boundary layer (MABL), and the other two (Izaña – IZO – at 2373 m a.s.l. and Teide Peak – TPO – at 3555 m a.s.l.) are high mountain stations within the free troposphere (FT). Monthly climatology of the aerosol optical depth (AOD), Ångström exponent (AE), aerosol concentration, size distribution and aerosol optical properties has been obtained for the MABL and FT. Measurements that are quite consistent across the four sites have been used to categorise the main atmospheric scenarios, and these measurements confirm an alternation between predominant background conditions and predominant dust-loaded Saharan air mass conditions caused by seasonal dust transport over the subtropical North Atlantic. Background conditions prevail in the MABL and FT for most of the year, while dust-laden conditions dominate in July and August.
Sponsorship : The authors also acknowledge the support from ACTRIS, Ministerio de Ciencia e Innovación, Spain, through the projects SYNERA (PID2020-118793GA-I00) and ePOLAAR (RTI2018-097864-BI00) and from Junta de Castilla y León (grant no. VA227P20).
ISSN: 1680-7316
Appears in Collections:Artículos científicos 2019-2022

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