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Source publication
Continuous measurement of black carbon (BC) concentrations in ambient air was performed using the optical-based instrument called aethalometer. The attenuation of light by BC was measured at 7 different wavelengths. This gives not only the pure concentration of BC in the ambient air but also dependence of attenuation on the wavelength of light, fro...
Contexts in source publication
Context 1
... we have measurements from all 7 wavelengths of light, we can calculate the Angstrom exponent [12]. If we assume that value 1 corresponds to liquid fuel (diesel) and value 2 of Angstrom exponent corresponds to biomass burning, we can estimate the biomass burning percentage in total BC mass ( Figure 5). From Figure 5 we can see that up to 70% of BC comes from burning solid fuels in the winter (domestic heating season), and only around 20% in May, when the majority of BC comes from diesel engines. ...
Context 2
... we assume that value 1 corresponds to liquid fuel (diesel) and value 2 of Angstrom exponent corresponds to biomass burning, we can estimate the biomass burning percentage in total BC mass ( Figure 5). From Figure 5 we can see that up to 70% of BC comes from burning solid fuels in the winter (domestic heating season), and only around 20% in May, when the majority of BC comes from diesel engines. Angstrom exponent based source apportionment Figure 5 also shows significant noise in the results, which should be investigated in more details. ...
Context 3
... Figure 5 we can see that up to 70% of BC comes from burning solid fuels in the winter (domestic heating season), and only around 20% in May, when the majority of BC comes from diesel engines. Angstrom exponent based source apportionment Figure 5 also shows significant noise in the results, which should be investigated in more details. But even though this is a rough estimate, this method is a very promising tool for source apportionment of BC. ...
Context 4
... we have measurements from all 7 wavelengths of light, we can calculate the Angstrom exponent [12]. If we assume that value 1 corresponds to liquid fuel (diesel) and value 2 of Angstrom exponent corresponds to biomass burning, we can estimate the biomass burning percentage in total BC mass ( Figure 5). From Figure 5 we can see that up to 70% of BC comes from burning solid fuels in the winter (domestic heating season), and only around 20% in May, when the majority of BC comes from diesel engines. ...
Context 5
... we assume that value 1 corresponds to liquid fuel (diesel) and value 2 of Angstrom exponent corresponds to biomass burning, we can estimate the biomass burning percentage in total BC mass ( Figure 5). From Figure 5 we can see that up to 70% of BC comes from burning solid fuels in the winter (domestic heating season), and only around 20% in May, when the majority of BC comes from diesel engines. Angstrom exponent based source apportionment Figure 5 also shows significant noise in the results, which should be investigated in more details. ...
Context 6
... Figure 5 we can see that up to 70% of BC comes from burning solid fuels in the winter (domestic heating season), and only around 20% in May, when the majority of BC comes from diesel engines. Angstrom exponent based source apportionment Figure 5 also shows significant noise in the results, which should be investigated in more details. But even though this is a rough estimate, this method is a very promising tool for source apportionment of BC. ...
Citations
... The black carbon facility is one component of a larger project of our research group, where different aspects of air pollution are observed and compared, including toxic gases [13], [14], and particulate matter [15]- [21]. We have used this technique previously [22], but this time, a new location is included: the city of Zenica. Figure 1 shows two measurement locations: one in Sarajevo (Faculty of Mechanical Engineering, N 43° 51' 15'', E 18° 23' 46'') and one in Zenica (Radakovo, N 44° 11' 43'', E 17° 55' 55''). ...
