February 28, 2007
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 7, NUMBER 7, JULY 1994
PROFESSIONAL PUBLICATIONS... ANTHROPOGENIC EMISSIONS
and Nitrous Oxide Emissions and Soil Nitrate Distribution in a
Center-Pivot-Irrigated Cornfield," W.D. Guenzi, G.L.
Hutchinson (USDA ARS, POB E, Ft. Collins CO 80522), W.E. Beard, J.
Environ. Qual., 23(3), 483-487, May-June 1994.
Field data suggest that, when the size and frequency of
irrigations are efficiently managed, use of a low energy
precision application (LEPA) irrigation system results in no
nitrogen loss to groundwater and no significant loss of NO and
N2O to the atmosphere.
and Projected Carbon Dioxide Emissions Due to Energy Utilization
in Turkey," M. Tiris (Tubitak-Marmara Res. Ctr., POB 21,
Gebze 41470, Kocaeli, Turkey), E. Alper, Energy, 19(4),
499-500, Apr. 1994.
Estimates long-term (1950-2010) CO2 emissions due to
fossil-fuel and biomass burning, using energy consumption,
energy-demand projections and emission data.
of Methane Emission to the Atmosphere from Indian Coal
Mining," B.D. Banerjee (Cent. Mining Res. Sta., Barwa Rd.,
Dhanbad-826001, India), A.K. Singh et al., Atmos. Environ., 28(7),
1351-1352, Apr. 1994.
Estimates that emissions from coal production increased from
0.06 to 0.40 million tons between 1951 and 1991, and may increase
to 0.60 million tons by 2000.
Increase of SF6 Observed in the Atmosphere," M. Maiss (Inst.
Umweltphys., Univ. Heidelberg, Neuenheimer Feld 366, D-69120
Heidelberg, Ger.), I. Levin, Geophys. Res. Lett., 21(7),
569-572, Apr. 1, 1994.
The global mean level of the anthropogenic gas SF6 increased
from 0.03 pptv in 1970 to 2.8 pptv in 1992. A modeled atmospheric
budget history leads to an extrapolated SF6 concentration of
about 20 pptv for 2030.
Nitrous Oxide Emissions from Agriculture: A Florida Case
Study," C. Li (Inst. Study Earth, Oceans & Space, Univ.
New Hampshire, Durham NH 03824), S.E. Frolking et al., Chemosphere, 28(7),
Applies the DNDC (denitrification-decomposition) model to
agricultural lands in Florida, a state with significant
agriculture on both organic and mineral soils. Such
process-oriented biogeochemical models will be critical to
developing an integrated framework to assess policies for
reducing N2O emissions.
Gas Emissions from Hydroelectric Reservoirs," L.P. Rosa
(Energy Planning Prog., COPPE, Univ. Fed. Rio de Janeiro, CP
68565, Cidade Univ., Ilha do Fundo, 21945-970 Rio de Janeiro,
Brazil),R. Schaeffer, Ambio, 23(2), 164-165,
Comment on a paper by Rudd et al. (Ambio, 22(4),
1993). Agrees that hydroelectric reservoirs may be significant
sources of greenhouse gases, but for the cases studied
hydroelectricity would be better than thermal power generation
with respect to global warming.
and Variations of Fluoride in Greenland Precipitation," M.
De Angelis (Lab. Glac. & Geophys. l'Environ., CNRS, Domaine
Univ., BP 96, 38402 St.-Martin-d'Heres Cedex, France), M.
Legrand, J. Geophys. Res., 99(D1), 1157-1172, Jan.
A profile of fluoride levels for the last 27,000 years
suggests that anthropogenic sources have dominated the fluoride
budget for the last three decades. CFC degradation has been a
possible source over the last 10 years, and it may be an
increasingly significant part of anthropogenic fluoride input
relative to coal burning.
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