RT info:eu-repo/semantics/article
T1 Unusual winter Saharan dust intrusions at Northwest Spain: Air quality, radiative and health impacts
A1 Oduber Pérez, Fernanda Isabel
A1 Calvo Gordaliza, Ana Isabel
A1 Blanco Alegre, Carlos del
A1 Castro Izquierdo, Amaya
A1 Nunes, Teresa Filomena Vieira
AD  1958-
A1 Alves, Célia
A1 Sorribas Panero, María Mar
A1 Fernández González, María Delia
A1 Vega Maray, Ana María
A1 Valencia Barrera, Rosa María
A1 Lucarelli, Franco
A1 Nava, Silvia
A1 Calzolai, Giulia
A1 Alonso Blanco, Elisabeth
A1 Fraile Laiz, Benito
A1 Fialho, Paulo Sousa
A1 Coz Diego, Esther
A1 Prév̂ot, André Stephan Henry
A1 Pont, Véronique
A1 Fraile Laiz, Roberto
A2 Fisica Aplicada
K1 Biología
K1 Física
K1 Meteorología
K1 Aerosol optical properties
K1 Bioaerosol
K1 Particle size distribution
K1 Radiative forcing
K1 Respirable fraction
K1 Winter dust intrusion
K1 22 Física
K1 2509.02 Contaminación Atmosférica
AB [EN] Saharan air masses can transport high amounts of mineral dust particles and biological material to the Iberian Peninsula. During winter, this kind of events is not very frequent and usually does not reach the northwest of the Peninsula. However, between 21 and 22 February 2016 and between 22 and 23 February 2017, two exceptional events were registered in León (Spain), which severely affected air quality. An integrative approach including: i) typical synoptic conditions; ii) aerosol chemical composition; iii) particle size distributions; iv) pollen concentration; v) aerosol optical depth (AOD); vi) radiative forcing and vii) estimation of the impact of aerosols in the respiratory tract, was carried out. In the global characterization of these events, the exceedance of the PM10 daily limit value, an increase in the coarse mode and a rise in the iron concentration were observed. On the 2016 event, an AOD and extinction-related Ångström exponent clearly characteristic of desert aerosol (1.1 and 0.05, respectively) were registered. Furthermore, pollen grains not typical of flowering plants in this period were identified. The chemical analysis of the aerosol from the 2017 event allowed us to confirm the presence of the main elements associated with mineral sources (aluminum, calcium, and silica concentrations). An increase in the SO42−, NO3− and Cl− concentrations during the Saharan dust intrusion was also noted. However, in this event, there was no presence of atypical pollen types. The estimated dust radiative forcing traduced a cooling effect for surface and atmosphere during both events, corroborated by trends of radiative flux measurements. The estimated impact on the respiratory tract regions of the high levels of particulate matter during both Saharan dust intrusions showed high levels for the respirable fraction
PB Elsevier
SN 0048-9697
LK https://hdl.handle.net/10612/17930
UL https://hdl.handle.net/10612/17930
NO Oduber, F., Calvo, A. I., Blanco-Alegre, C., Castro, A., Nunes, T., Alves, C., Sorribas, M., Fernández-González, D., Vega-Maray, A. M., Valencia-Barrera, R. M., Lucarelli, F., Nava, S., Calzolai, G., Alonso-Blanco, E., Fraile, B., Fialho, P., Coz, E., Prevot, A. S. H., Pont, V., & Fraile, R. (2019). Unusual winter Saharan dust intrusions at Northwest Spain: Air quality, radiative and health impacts. Science of The Total Environment, 669, 213–228. https://doi.org/10.1016/J.SCITOTENV.2019.02.305
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 30-jun-2024