Phenomenology and geographical gradients of atmospheric deposition in southwestern Europe: Results from a multi-site monitoring network

Pey, Jorge; Larrasoaña, Juan C.; Pérez, Noemí; Cerro, José Carlos; Castillo, Sonia; Tobar, María Luisa; Vergara, A.; Vázquez, Icíar; Reyes, Jesús; Mata, Pilar; Mochales, Tania; Orellana, Jose; Causapé, J.

doi:10.1016/j.scitotenv.2020.140745

Cited by 13 publications

(17 citation statements)

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“…When these scenarios take place, large amounts of mineral dust particles are usually deposited over the Pyrenees. As discussed in [29], the significance of this phenomenon decreases in parallel toward the west side of the Pyrenees, but their impact toward the East part is still unclear, and their impact northwards (French side) is expected to be lessened.…”

Section: Discussionmentioning

confidence: 99%

“…Atmospheric deposition samples were collected uninterruptedly at the Ordesa and Monte Perdido National Park (ORD), at an elevation of 1200 m a.s.l. Details about site characteristics, sample collection and laboratory processes are given in [29]. Snow measurements were conducted in the nearby Izas experimental catchment, at an elevation of 2050 m a.s.l., which is located 35 km to the NW of ORD.…”

Section: Study Area and Periodmentioning

confidence: 99%

“…Aliquots from each sample were obtained and subsequently analyzed. Methodological details and results from these analyses are given in [29]. By taking into account the accumulated volume, the collection surface and the concentration of soluble-inorganic species, the related deposition flux of soluble inorganic species was obtained for each monitoring period.…”

Section: Sample Collectionmentioning

confidence: 99%

“…In contrast, aerosol fluxes were much higher during 2016-2017 and 2017-2018 cold seasons, rising to 11.7 to 13.0 g m −2 for the insoluble fraction, and 10.0 to 10.3 g m −2 to the soluble fraction, whereas they were significantly lower in 2018-2019 cold season. High aerosol fluxes observed during the cold season were driven by the impact of severe African dust episodes (see [29] for further details). In our case, a single event occurred in April 2018 transferred 10.6 g m −2 of insoluble particles.…”

Section: Aerosol Fluxes and Seasonal Variations: Impact Of African Dustmentioning

confidence: 99%

“…mainly located in their central part. African dust air masses reach this mountain barrier around 10% of the annual days [23], but dust deposition is strongly magnified in this region with respect to other areas located hundreds of kilometers southwards [29]. In this article we discuss about the relevance of aerosol inputs in the Central Pyrenees, their chemical-mineralogical composition, the role of desert dust in the observed fluxes, and their inter-annual variations.…”

Section: Introductionmentioning

confidence: 99%

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Snow Impurities in the Central Pyrenees: From Their Geochemical and Mineralogical Composition towards Their Impacts on Snow Albedo

et al. 2020

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The aim of this work is to understand aerosol transfers to the snowpack in the Spanish Pyrenees (Southern Europe) by determining their episodic mass-loading and composition, and to retrieve their regional impacts regarding optical properties and modification of snow melting. Regular aerosol monitoring has been performed during three consecutive years. Complementarily, short campaigns have been carried out to collect dust-rich snow samples. Atmospheric samples have been chemically characterized in terms of elemental composition and, in some cases, regarding their mineralogy. Snow albedo has been determined in different seasons along the campaign, and temporal variations of snow-depth from different observatories have been related to concentration of impurities in the snow surface. Our results noticed that aerosol flux in the Central Pyrenees during cold seasons (from November to May, up to 12–13 g m−2 of insoluble particles overall accumulated) is much higher than the observed during the warm period (from June to October, typically around 2.1–3.3 g m−2). Such high values observed during cold seasons were driven by the impact of severe African dust episodes. In absence of such extreme episodes, aerosol loadings in cold and warm season appeared comparable. Our study reveals that mineral dust particles from North Africa are a major driver of the aerosol loading in the snowpack in the southern side of the Central Pyrenees. Field data revealed that the heterogeneous spatial distribution of impurities on the snow surface led to differences close to 0.2 on the measured snow albedo within very short distances. Such impacts have clear implications for modelling distributed energy balance of snow and predicting snow melting from mountain headwaters.

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Section: Discussionmentioning

confidence: 99%

Section: Study Area and Periodmentioning

confidence: 99%

Section: Sample Collectionmentioning

confidence: 99%

Section: Aerosol Fluxes and Seasonal Variations: Impact Of African Dustmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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