AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Impact of Residential Heating to Temporal/Spatial Variability of Size-segregated Aerosol Mass and Number at the Urban Microscale Level
JAN BENDL, Jan Hovorka, Tereza Bartonova, Vlasta Svecova, Cecilia Leoni, Miroslav Klán, Lubos Matejicek, Charles University in Prague
Abstract Number: 575 Working Group: Aerosol Exposure
Abstract Wood and coal combustion in local heating are often a major source of air pollution in villages and small cities. PMx and PAHs health limits are exceeded especially in winter during inversion situations and unfavorable micro-scale geomorphology like closed valleys. Large spatial variability of PM within urban microscale is common phenomenon due to few heavy polluters. Some people burn low quality fuel and despite law even waste and produce toxic emissions. Nevertheless, very few studies on temporal/spatial variability were made although true PM exposure may differ from fixed-site measuring data.
In Švermov, residential district of Kladno city in Czech Republic, there was perambulation of the length 3.5 km conducted 61 times in February 2016. During the perambulations 5 second data of GPS position, photo time-lapse, PM$_(10), PM$_(2.5), PM$_1 by a Dustrak DRX (TSI), submicrometer particle number concentration (PNC) by P-Trak (TSI), NO$_X, O$_3, temperature and relative humidity by LEO (Ateknea) were recorded. The monitors were positioned in the backpack connected to an omnidirectional vertical inlets protruding about 20 cm from the backpack. Perambulations were conducted usually 3-4 a day for capturing diurnal variability at an average speed of 5 km/h.
For instance, on February 11 average PNC and PM$_(10) concentration were during morning perambulation 4722 pt/cc and 15 ug/m$^(-3), at noon 3427 and 15, at afternoon 11523 and 61 and in the evening 5163 pt/cc and 45 ug/m$^(-3). PNC concentration increased up to 10$^5 pt/cc close to the main road and in the plumes from the local heating. Comprehensive data analysis is being process.
Mobile measurements allow us to quantify PM and PNC variability due to local home heating within the microscale urban environment.
The study is supported by the Czech Grant Agency (P503/12/G147) and FP7/ENV-2012-308524-2/CITI-SENSE.