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The ultraviolet absorption cross sections were measured for CF3Br, CF2ClBr, CF2Br-CF2Br, CF2Br2, CHF2Br, CHFBr-CF3, CH2Br-CF3, CHClBr-CF3 in the wavelength range 190–320 nm at 295 K. The photolysis is concluded to be the minor atmospheric sink for CHF2Br, CHFBr-CF3, CH2Br-CF3, CHClBr-CF3.
Examination of odd-hydrogen production and loss processes in the lower stratosphere reveals that the large abundances of midlatitude ClO recently measured requires a reassessment of the OH yield from methane oxidation due to a more rapid initiation of the methane oxidation sequence by atomic...
A fully automated system measuring C2–C6 hydrocarbon concentrations and vertical gradients was installed at Harvard Forest in Petersham, Massachusetts, using a gas chromatograph with dual flame ionization detectors and cryogenic sample preconcentration. Measurements were made simultaneously at...
We call attention to the likely importance of the potential reaction OH+ClO→HCl+O2. It may only be a minor channel for the reaction of OH with ClO, which is often ignored in models, but if it occurs it considerably increases the rate of recovery of HCl after an air parcel has encountered a polar...
Henry's law constants K′H (mol kg−1 atm−1) for the reaction HOCl(g)=HOCl(aq) near room temperature, literature data for the associated enthalpy change, and solubilities of HOCl in aqueous H2SO4 (46 to 60 wt%) at temperatures relevant to the stratosphere (200 K≤T≤230 K) are shown to be...
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