February 28, 2007
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A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 7, NUMBER 2, FEBRUARY 1994
- HALOCARBONS: METHYL BROMIDE
Methyl Bromide: Trends and Global Mass Balance," M.A.K.
Khalil (Global Change Res. Ctr., Oregon Grad. Inst., POB 91,000,
Beaverton OR 97006), R.A. Rasmussen, R. Gunawardena, J.
Geophys. Res., 98(D2), 2887-2896, Feb. 20, 1993.
Presents concentration data, including a decadal time series,
latitudinal distributions in air and ocean, and variation with
altitude. Uses the data to construct a global mass balance to
estimate total emissions and apportionment between natural and
Investigation of the Atmospheric Sources and Sinks of Methyl
Bromide," H.B. Singh (NASA-Ames, Moffet Field CA 94035), M.
Kanakidou, Geophys. Res. Lett., 20(2), 133-136,
Jan. 22, 1993.
Estimates that sources are about 35% anthropogenic and 65%
natural. Oceans are the most important natural source. Model
calculations show significant vertical and seasonal variations in
Substitution Rates and Solubilities for Methyl Halides in
Seawater," S. Elliott (Inst. Geophys., Los Alamos Natl.
Lab., Los Alamos NM 87545), F.S. Rowland, ibid., 20(11),
1043-1046, June 7, 1993.
Measured rate constants for attack on CH3Br by chloride ion
and H2O. Results are consistent with classical aqueous-phase
research, adjusted for ionic strength effects.
Temperature Dependent Kinetic Study of the Reaction of the
Hydroxyl Radical with CH3Br," Z. Zhang (Chem. Kinetics Div.,
Natl. Inst. Stand. & Technol., Gaithersburg MD 20899), R.D.
Saini et al., Geophys. Res. Lett., 12(24),
2413-2416, Dec. 24, 1992.
Estimates the tropospheric lifetime at 277 K to be 2.2 years
with respect to OH, and 2.1 years overall.
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