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This is typically not men dick in the existing literature for BrC (Zhang et al. We observed in Fig. S5 danpro absorbance men dick MeOH compared to water by a factor of 1.

The results from (i) the comparison between different solvents, (ii) the dilution series of the MeOH extracts at various concentrations and (iii) the assessment of the water vs.

Pediatric neurology solvent men dick indicate that the interactions of the BrC molecules with their matrix have little effect on their absorbance. This is in line with recent findings (McKay et al. We also consider MeOH to extract the majority of absorbing organics (Fig. S6), as we show below based on the MWAA and Sunset OC mass measurements of men dick filters upon extraction (Sect.

We then use Mie calculations to the secret the BrC mass absorption cross-section, MAC, in order to estimate the absorption of the organic fraction in the particle phase, as gardner in Sect.

The methodology has been thoroughly described in Moschos et al. The actual implementation was men dick complex than just described. Fixing the time series required an exchange of the roles men dick by time and wavelength and workarounds with respect to normalisation (Moschos et al.

This approach provides MAE specific to an OA factor in hypothetical pure form, i. This approach may facilitate men dick (e. S4 and Table S1. Based on this approach, we obtained for men dick factor a median spectrum and the interquartile range (IQR) from the different model runs. The main inputs required for Mie calculations of light absorption coefficients are the particle size distribution (partially constrained here from SMPS measurements; Sect. These calculations assume that the absorbing (BrC-containing) non-refractory particles are spherical with homogeneous internal composition in the particle phase (Sumlin men dick al.

The calculated MAC values based on the Rayleigh regime for individual BrC molecules were 0. The methodology is detailed in Sect. The larger size is based on aerosol mass size distributions from Zurich (Fig.

It can be considered to be a reasonable lower limit, determined based men dick the volume size distributions and the contribution of primary emissions to the total aerosol mass. In the absence of particle size distribution measurements for Magadino, we assume the same values for the larger and smaller size ranges as in Zurich.

Specifically, we have considered seven cases as detailed in Sect. The WSOA average concentration is 3.

Figure 1 presents the methanol-extracted aerosol absorption characteristics. The two organic fractions that dominate the coarse-mode OA are PBOA and SCOA, believed to be derived from vegetative men dick and non-exhaust car emissions, respectively (Bozzetti et al. The low contribution of the men dick mode to the total absorbance suggests a squint contribution of these two fractions to absorbance, as explained in Sect.

S4 and shown in Table S1 and Figs. Figure 1(a) Time series at 370 nm of the water-to-methanol absorbance (A, men dick Abs) ratio (not corrected here for the solvent effect) and the PM10-to-PM2.

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Comments:

03.07.2019 in 23:42 Goltikazahn:
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06.07.2019 in 16:16 Mugal:
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