Konstantinos Dimitriou

  • Laboratory of Meteorology, Department of Physics, University of Ioannina, (null), Greece

Received: March 14, 2015
Revised: May 1, 2015
Accepted: May 1, 2015
Download Citation: ||https://doi.org/10.4209/aaqr.2015.03.0162  

  • Download: PDF


Cite this article:
Dimitriou, K (2015). The Dependence of PM Size Distribution from Meteorology and Local-Regional Contributions, in Valencia (Spain) – A CWT Model Approach. Aerosol Air Qual. Res. 15: 1979-1989. https://doi.org/10.4209/aaqr.2015.03.0162


HIGHLIGHTS

  • Atmospheric stagnation conditions triggered the accumulation of PM2.5 and PM1.
  • Wind blown dust enhanced PMCOARSE concentrations mainly during warm seasons.
  • Vehicular PM emissions were emerged.
  • Extreme PM events of all size fractions matched with South-South West airflows.
  • Saharan dust PMCOARSE intrusions were clearly indicated.

 

ABSTRACT


This paper combines an analysis of hourly air pollution measurements and daily meteorological data with backward air mass trajectories, in order to elucidate local/regional sources and processes (e.g., atmospheric dispersion/stagnation, dust resuspension, etc.) defining PM levels and size distribution in Valencia (Spain). Four size fractions of PM (PM10, PMCOARSE = PM10–PM2.5, PM2.5 and PM1) were independently studied. No chemical/physical interactions among the four different size categories were assumed. Wind dispersion of PM2.5 and PM1 was indicated, whereas atmospheric stagnation conditions triggered the accumulation of fine particles, mainly produced from local combustion. Wind blown dust enhanced PMCOARSE concentrations, particularly throughout warm periods when dry land facilitates dust resuspension. Hourly air mass trajectory points were analyzed by Concentration Weighted Trajectory (CWT) model and Potential Source Contribution Function (PSCF) on a 0.5° × 0.5° resolution grid. The outcome of CWT model and PSCF identified Iberian Peninsula, France, North-West Africa and the Mediterranean as potential exogenous PM source areas. Extreme events of all PM fractions were primarily associated with the prevalence of South-South West airflows, whereas Saharan dust PMCOARSE intrusions also emerged. The availability of hourly meteorological data and the analysis of the chemical species included in PM mass could further clarify the findings of this paper and remove uncertainties.


Keywords: PM10; PM2.5; PM1; Potential source contribution function; Concentration weighted trajectory model


Share this article with your colleagues 

 

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.

7.3
2022CiteScore
 
 
77st percentile
Powered by
Scopus
 
   SCImago Journal & Country Rank

2022 Impact Factor: 4.0
5-Year Impact Factor: 3.4

Aerosol and Air Quality Research partners with Publons

CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit
CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.