A. Huerta-Viso, J. Crespo, N. Galindo, E. Yubero, J.F. Nicolás This email address is being protected from spambots. You need JavaScript enabled to view it.

Atmospheric Pollution Laboratory (LCA), Department of Applied Physics, Miguel Hernández University, Avenida de la Universidad S/N, 03202 Elche, Spain


Received: February 14, 2020
Revised: April 26, 2020
Accepted: June 22, 2020

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.


Download Citation: ||https://doi.org/10.4209/aaqr.2020.01.0038 

  • Download: PDF


Cite this article:

Huerta-Viso, A., Crespo, J., Galindo, N., Yubero, E. and Nicolás, J. F. (2020). Saharan Dust Events over the Valencian Community (Eastern Iberian Peninsula): Synoptic Circulation Patterns and Contribution to PM10 Levels. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.2020.01.0038


HIGHLIGHTS

  • Average dust contribution suppose 23% to the PM10 average value in VC.
  • Greatest Saharan mass contributions take place mainly in summertime.
  • Five types of meteorological scenarios at 850 hPa can trigger SDE into VC.
  • Saharan inputs fit well with Gamma distribution functions.
 

ABSTRACT


A characterization of Saharan Dust Events (SDE) passing over the Valencian Community (Eastern Spain) during the 2014-2017 period has been carried out. The assessment has focused on the following points: a) the study of their occurrence and impact on PM10 mass concentrations, b) the identification of the favorable synoptic patterns at 850 hPa associated with SDE by means of a cluster analysis and c) the application of the Gamma Probability Density Function (PDF) to fit the mass contributions of SDE to PM10 levels. The study has determined that the Valencian Community (VC) is under the influence of this kind of transport on ~26% of the days of the year, contributing 3.3 mg m-3 (~23%) to the PM10 average value. Five circulation scenarios (1-5) were identified. In scenario 1 (17.4%), the transport was produced due to a trough placed over the southwest of the Iberian Peninsula coupled with a high pressure system centred on Western Algeria, Tunisia and Eastern Libya. According to the PDF analysis, SDE characterized by this type of pattern were most likely to have elevated contributions to PM10 mass concentrations. In scenarios 3 (39.2%) and 5 (19.4%), a high pressure system located over North Africa was present. Both types of patterns also contributed to high concentrations of mineral dust in the VC. Scenarios 1, 3 and 5 were more frequent during summer months, specially type 3 (69%). On the other hand, types 2 (16.2%) and 4 (7.2%), both characterized by a deep low located over the West or Northwest of the Iberian Peninsula, were frequent in spring and, to a lesser extent, during the winter season. Scenarios 2 and 4 had a lower probability to contribute to high concentrations of mineral dust over the study area.


Keywords: PM10; Meteorological scenario; Cluster analysis; Saharan dust; Gamma distribution.



Aerosol Air Qual. Res. 20:-. https://doi.org/10.4209/aaqr.2020.01.0038 

Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.