figure 1
Atmospheric
concentration of from a) 1977-1988 and b) the last 200 years. Houghton, J.T., G.J. Jenkins, J.J. Ephraums, eds,
1990: 1990 Intergovernment Panel on Climate Change, Cambridge
University Press.
figure 2
Estimated sources and sinks of nitrous oxide. Adapted from table
1.4, p 26, of Houghton, J.T., G.J. Jenkins, J.J. Ephraums, eds, 1990:
1990 Intergovernment Panel on Climate Change, Cambridge University
Press.
figure 3
Nitrogen
fertilizer consumption. EPA.
figure 4
Annual emissions of
and
from 1900-1980. EPA.
figure 5
Estimated sources of Nitrogen Oxides.
Adapted from IPCC, 1992. EPA.
figure 6
Nitrogen cycle.
J. D. Butler, Air Pollution Chemistry, 1979
figure 7
Biogeochemical Processes. U.S. Global Change Research Program.
figure 8
Estimated annual global sulfur emissions from
1860-1980. Source unknown.
figure 9
Estimated sources of
short-lived sulfur gases. Adapted from IPCC, 1992.
figure 10
The sulfur cycle in the biosphere. J. D. Butler, Air Pollution Chemistry,
1979 .
figure 11
Simulated concentrations
of sulfate at 900hPa. IPCC, 1990
figure 12
Formation/destruction of tropospheric ozone. Mckee, David J. 1994: Tropospheric
Ozone: Human Health and Agricultural Impacts. Lewis Publications, Boca Raton. 333 pp.
figure 13
Impact of high levels of ozone. Mckee, David J. 1994:
Tropospheric Ozone: Human Health and Agricultural Impacts. Lewis Publications, Boca
Raton. 333 pp.
figure 14
Plant yield loss due to tropospheric ozone. Adapted from McKee,
D. J., Tropospheric Ozone: Lewis Publications, 1994.
figure 15
Summary of ozone concentrations
predicted to cause 10 - 30% yield losses and summary of yield losses
predicted to occur at 7-h seasonal mean ozone concentrations of 0.04 and
0.06 ppm. Adapted from McKee, David J., 1994: Tropospheric Ozone.
figure 16
Predicted relative soybean yield
loss for 1987. McKee, David J., 1994: Tropospheric Ozone.
Figure 7, p 193. Reprinted with permission from CRC Press, Inc.
figure 17
Predicted
relative wheat yield
loss for 1987. McKee, David J., 1994: Tropospheric Ozone.
Figure 7, p 193. Reprinted with permission from CRC Press, Inc.
Nitrous Oxide
Sources of Nitrous Oxide
Other Oxides of Nitrogen
Nitrogen Cycle
Sulfur Emissions
Sulfur Cycle
Phosphorus
Tropospheric Ozone
