The contribution of wood burning and other pollution sources to wintertime organic aerosol levels in two Greek cities
Other literature type
Papanastasiou, Dimitrios K.
Gkatzelis, Georgios I.
Pandis, Spyros N.
(issn: 1680-7324, eissn: 1680-7324)
The composition of fine particulate matter (PM) in two
major Greek cities (Athens and Patras) was measured during two wintertime
campaigns, one conducted in 2013 and the other in 2012. A major goal of this
study is to quantify the sources of organic aerosol (OA) and especially
residential wood burning, which has dramatically increased due to the Greek
financial crisis. A high-resolution time-of-flight aerosol mass spectrometer
(HR-ToF-AMS) was deployed at both sites. PM with diameter less than 1 µm (PM<sub>1</sub>) consisted mainly of organics (60–75 %), black carbon
(5–20 %), and inorganic salts (around 20 %) in both Patras and Athens. In
Patras, during evening hours, PM<sub>1</sub> concentrations were as high as 100 µg m<sup>−3</sup>, of which 85 % was OA. In Athens, the maximum
hourly value observed during nighttime was 140 µg m<sup>−3</sup>, of which
120 µg m<sup>−3</sup> was OA. Forty to 60 % of the average OA was due to
biomass burning for both cities, while the remaining mass originated from
traffic (12–17 %), cooking (12–16 %), and long-range transport
(18–24 %). The contribution of residential wood burning was even higher
(80–90 %) during the nighttime peak concentration periods, and less than
10 % during daytime. Cooking OA contributed up to 75 % during mealtime
hours in Patras, while traffic-related OA was responsible for 60–70 % of
the OA during the morning rush hour.