Journal ArticleDOI
The photochemistry of a remote marine stratiform cloud
Reads0
Chats0
TLDR
In this article, coupled gas and aqueous-phase photochemistry of a stratiform cloud in a remote region of the marine atmosphere is investigated with a time-dependent box model.Abstract:
The coupled gas- and aqueous-phase photochemistry of a stratiform cloud in a remote region of the marine atmosphere is investigated with a time-dependent box model. Both scavenging of ambient acidic aerosols and gases as well as aqueous-phase chemical reactions within droplets are found to be important sources of acidity to cloud water and can lead to pH levels in cloud water in the remote marine atmosphere well below 5.6. The major sources of acidity via aqueous-phase chemical reactions are the generation of sulfuric acid from dissolved SO2 and the generation of formic acid from dissolved formaldehyde. In both cases, aqueous-phase free radicals can play a significant role either directly by oxidizing dissolved SO2 and HCHO or indirectly by producing the aqueous-phase oxidant H2O2. The rate of SO2 conversion to sulfuric acid is sensitive to a variety of parameters including the accommodation or sticking coefficient for SO2, H2O2, HO2, and OH, the liquid water content, and the ambient levels of SO2, HNO3, and other acidic or basic gases. Because high levels of SO2 tend to deplete cloud water of H2O3, the possibility exists that the pH of precipitation in polluted regions will respond nonlinearly to reduced SO2 emissions.read more
Citations
More filters
Journal ArticleDOI
Measurements of H2O2, aldehydes and organic acids in Los Angeles rainwater: Their sources and deposition rates☆
TL;DR: In this paper, the authors collected rainwater samples during 1985-1991 to determine concentration levels, sources and deposition rates of atmospheric H2O2, aldehydes and organic acids, in addition to major cations, anions and pH.
Journal ArticleDOI
Heterogeneous uptake of ozone on reactive components of mineral dust aerosol: an environmental aerosol reaction chamber study.
TL;DR: At the pressures used, alpha-Fe2O3 shows clear evidence for catalytic decomposition of ozone while alpha-Al3 appears to saturate at a finite ozone coverage and the measured uptake for both minerals decreases markedly as the RH is increased.
Journal ArticleDOI
Net ozone photochemical production over the eastern and central North Pacific as inferred from GTE/CITE 1 observations during fall 1983
William L. Chameides,Douglas D. Davis,Michael O. Rodgers,John D. Bradshaw,Scott T. Sandholm,G. W. Sachse,G. F. Hill,Gerald L. Gregory,R. A. Rasmussen +8 more
TL;DR: In this paper, the role of photochemistry in the budget of tropospheric ozone is studied and a photochemical model is utilized to calculate the net rate of ozone production by photochemical reactions.
Journal ArticleDOI
Kinetics and spectroscopy of the SO4− radical in aqueous solution
TL;DR: In this paper, the authors used laser flash photolysis of S2O82− at 248 nm and 266 nm to investigate the kinetics and spectroscopy of the SO4− radical in aqueous solution.
Posted ContentDOI
Compilation of Henry's law constants, version 3.99
TL;DR: In this article, the authors present a survey of the literature in this area: https://www.referred.org.au/blog/blogging-and-blogging/
References
More filters
Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
Chemical kinetics and photochemical data for use in stratospheric modeling
W. B. Demore,J. J. Margitan,Mario J. Molina,R. T. Watson,D. M. Golden,R. F. Hampson,Michael J. Kurylo,Carleton J. Howard,A. R. Ravishankara +8 more
TL;DR: As part of a series of evaluated sets, rate constants and photochemical cross sections compiled by the NASA Panel for Data Evaluation are provided in this article, with particular emphasis on the ozone layer and its possible perturbation by anthropogenic and natural phenomena.
Journal ArticleDOI
Tropospheric chemistry: A global perspective
TL;DR: A model for the photochemistry of the global troposphere constrained by observed concentrations of H2O, O3, CO, CH4, NO, NO2, and HNO3 is presented in this paper.
Book
Selected values of chemical thermodynamic properties
TL;DR: The Selected Values of Chemical Thermodynamic Properties as mentioned in this paper, published by the National Bureau of Standards (NBS) in 1952, is a seminal work in the field of thermodynamics.