A European aerosol phenomenology -4: Harmonized concentrations of carbonaceous aerosol at 10 regional background sites across Europe

Research output: Contribution to journalArticle

Abstract

Although particulate organic and elemental carbon (OC and EC) are important constituents of the suspended atmospheric particulate matter (PM), measurements of OC and EC are much less common and more uncertain than measurements of e.g. the ionic components of PM. In the framework of atmospheric research infrastructures supported by the European Union, actions have been undertaken to determine and mitigate sampling artefacts, and assess the comparability of OC and EC data obtained in a network of 10 atmospheric observatories across Europe. Positive sampling artefacts (from 0.4 to 2.8 μg C/m3) and analytical discrepancies (between −50% and +40% for the EC/TC ratio) have been taken into account to generate a robust data set, from which we established the phenomenology of carbonaceous aerosols at regional background sites in Europe. Across the network, TC and EC annual average concentrations range from 0.4 to 9 μg C/m3, and from 0.1 to 2 μg C/m3, respectively. TC/PM10 annual mean ratios range from 0.11 at a Mediterranean site to 0.34 at the most polluted continental site, and TC/PM2.5 ratios are slightly greater at all sites (0.15–0.42). EC/TC annual mean ratios range from 0.10 to 0.22, and do not depend much on PM concentration levels, especially in winter. Seasonal variations in PM and TC concentrations, and in TC/PM and EC/TC ratios, differ across the network, which can be explained by seasonal changes in PM source contributions at some sites.

Details

Authors
  • F. Cavalli
  • A. Alastuey
  • H. Areskoug
  • D. Ceburnis
  • J. Čech
  • J. Genberg
  • R. M. Harrison
  • J. L. Jaffrezo
  • G. Kiss
  • P. Laj
  • N. Mihalopoulos
  • N. Perez
  • P. Quincey
  • J. Schwarz
  • K. Sellegri
  • G. Spindler
  • C. Theodosi
  • K. E. Yttri
  • W. Aas
  • J. P. Putaud
Organisations
External organisations
  • European Commission Joint Research Centre, Ispra
  • National University of Ireland Galway
  • Czech Hydrometeorological Institute
  • King Abdulaziz University
  • University Grenoble Alpes
  • University of Crete
  • National Physical Laboratory, UK
  • Institute of Chemical Process Fundamentals, Academy of Sciences of the Czech Republic
  • Blaise Pascal University
  • Leibniz Institute for Tropospheric Research (TROPOS)
  • Norwegian Institute for Air Research
  • CSIC Institute of Environmental Assessment and Water Research (IDAEA)
  • Stockholm University
  • University of Birmingham
  • University of Pannonia
  • University of Helsinki
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Meteorology and Atmospheric Sciences

Keywords

  • Aerosol, Carbonaceous, Europe, Phenomenology, PM
Original languageEnglish
Pages (from-to)133-145
Number of pages13
JournalAtmospheric Environment
Volume144
Publication statusPublished - 2016 Nov 1
Publication categoryResearch
Peer-reviewedYes