Evaluation of Local Scale PM Pollution Levels in Typical Street Canyon in Riga
- 1 Faculty of Geography and Earth Sciences, University of Latvia, Riga, Latvia
- 2 Faculty of Geography and Earth Sciences, University of Latvia, Riga, Latvia
- 3 Institute of Solid State Physics, University of Latvia, Riga, Latvia
- 4 Housing and Environment Department, Riga City Council, Riga, Latvia
- 5 Faculty of Engineering, Vidzeme University of Applied Sciences, Valmiera, Latvia
Abstract
The present study describes long term PM 10 and PM 2.5 changes in typical street canyon with particular emphasis on seasonal, diurnal variations in context with meteorological data. In order to understand PM 10 pollution sources during 28 April 2007 - 31 December 2007 , chemical composition measurements were done with particular emphasis on heavy metals (As, Cd, Ni, and Pb), crustal material (Ca, Mg, Na, and K) and anions (sulphates, nitrates, chlorides). Meteorological data used for this evolutional analysis were measured close to traffic related stations and several meteorological parameters were analyzed in relation to particulate measurements. Keep in mind that atmospheric aerosols are generally hydroscopic. Relative humidity which plays very important role in rain/snow and humidity impact are analyzed.
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