Sign up & Download
Sign in

The influence of organic compounds on the development of precipitation acidity in maritime clouds

by L. Alfonso, G. B. Raga
Atmospheric Chemistry and Physics ()

Abstract

In order to estimate the anthropogenic influence of gas and aerosol emissions from the Petroleum Industry in maritime zones with clouds of small vertical extent, a nu- merical 1-D Eulerian cloud-chemical model with detailed microphysics (Alfonso and Raga, 2002) is used to simulate the influence of water soluble organic compounds (WSOC) and organic+inorganic gas emissions on cloud development. Following Mircea et al. (2002), we tested the sensitivity of the cloud and precipitation development in the classical inor- ganic case (CIC) and the inorganic+organic case (IOC) with respect to CCN compositions. The results indicate an in- crease in the droplet concentration for the IOC, and a delay in the development of precipitation. The pH spectral evolution was studied during both the de- velopment and precipitation stages. The influence of the dif- fusion of formic acid and its generation by oxidation of hy- drated formaldehyde in the aqueous phase result in a reduc- tion in the pH of precipitation in the range between 0.05 and 0.15pH units (from 1 to 3%) for the high ambient SO2 con- centration (20 ppb) and between 0.2–0.5pH units (from 4 to 10%) for the low ambient SO2 concentration (1 ppb) case.

Cite this document (BETA)

Readership Statistics

2 Readers on Mendeley
by Discipline
 
 
by Academic Status
 
50% Doctoral Student
 
50% Post Doc

Sign up today - FREE

Mendeley saves you time finding and organizing research. Learn more

  • All your research in one place
  • Add and import papers easily
  • Access it anywhere, anytime

Start using Mendeley in seconds!

Already have an account? Sign in