Interactive comment on “On the volatility and production mechanisms of newly formed nitrate and water soluble organic aerosol in Mexico City” by C. J. Hennigan et al
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چکیده
Comment 1: 8220;8230;Entrained air presumably has low hydrocarbon concentrations which should drive semivolatiles from the aerosol to gas phase. Thus the authors conclusion appears reasonable. However, I’m not sure that it is justified by the data; I don’t think that the fact that there is a very good correlation between WSOC and NH4NO3 automatically rules in favor of a 1/3 2/3 split for both species. Part of the correlation is generated in the growth phase. Part is due to dilution which (may) act on both compounds similarly. Additional correla-
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On the volatility and production mechanisms of newly formed nitrate and water soluble organic aerosol in Mexico City
Measurements of atmospheric gases and fine particle chemistry were made in the Mexico City Metropolitan Area (MCMA) at a site ∼30 km down wind of the city center. Ammonium nitrate (NH4NO3) dominated the inorganic aerosol fraction and showed a distinct diurnal signature characterized by rapid morning production and a rapid mid-day concentration decrease. Between the hours of 08:00–12:45, particu...
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