rdmcandie wrote:
Quote:
Global Atmospheric Cooling due to Increase in CO2 Content
Increase in CO2 content leads to global cooling of atmosphere. This paradoxical, at ï¬rst
sight, conclusion can be inferred from the adiabatic theory of heat transfer. To compare
the temperature characteristics of a planet at various compositions of its atmosphere, one
can use Eq. (11).
If one assumes that the existing nitrogen–oxygen atmosphere of Earth is replaced
entirely by an imaginary carbon dioxide atmosphere with the same pressure of 1 atm
and adiabatic exponent Ë› D 0:1428, then the value of b
Ë› D 1:597
0:1428 D 1:069 and the
near-surface temperature would decline to 281.6 K. Thus, the atmospheric temperature
would decreases by 6.4
ı
C, instead of increasing according to the traditional theory.
Constructing the distributions of temperature in the carbon dioxide atmosphere, one
should take into consideration the fact that for the same pressure the corresponding
elevation above sea level is lower than that for the nitrogen–oxygen atmosphere of
Earth: h.CO2/ D h.N2 C O2/ 29=44, where h is the elevation, and 29 and 44 are
the molecular weights of nitrogen–oxygen and carbon dioxide atmospheres, respectively.
Such temperature distributions are shown in Figure 1. In this ï¬gure, the graph of temperature distribution for the carbon dioxide troposphere lies below the graph of distribution
for the nitrogen–oxygen atmosphere. Thus, the near-surface temperature for the carbon
dioxide atmosphere is 6.4
ı
C lower than that for the nitrogen–oxygen atmosphere and not
considerably higher as some scientists continue to believe. Therefore, the accumulation
of carbon dioxide in great amounts in atmosphere should lead only to the cooling of
climate, whereas insigniï¬cant changes in the partial pressure of CO2 (few hundreds of
ppm) practically would not influence the average temperature of atmosphere and the
Earth’s surface.
Similarly, if one assumes that the existing carbon dioxide atmosphere of Venus is
entirely replaced by the nitrogen–oxygen atmosphere at the same pressure of 90.9 atm,
then its surface temperature would increase from 735 to 796 K. Thus, increasing the
saturation of atmosphere with carbon dioxide (despite its radiation absorbing capacity),
with all other conditions being equal, results in a decrease and not an increase of
the greenhouse effect and a decrease in average temperature of planet’s atmosphere.
Increase in CO2 content leads to global cooling of atmosphere. This paradoxical, at ï¬rst
sight, conclusion can be inferred from the adiabatic theory of heat transfer. To compare
the temperature characteristics of a planet at various compositions of its atmosphere, one
can use Eq. (11).
If one assumes that the existing nitrogen–oxygen atmosphere of Earth is replaced
entirely by an imaginary carbon dioxide atmosphere with the same pressure of 1 atm
and adiabatic exponent Ë› D 0:1428, then the value of b
Ë› D 1:597
0:1428 D 1:069 and the
near-surface temperature would decline to 281.6 K. Thus, the atmospheric temperature
would decreases by 6.4
ı
C, instead of increasing according to the traditional theory.
Constructing the distributions of temperature in the carbon dioxide atmosphere, one
should take into consideration the fact that for the same pressure the corresponding
elevation above sea level is lower than that for the nitrogen–oxygen atmosphere of
Earth: h.CO2/ D h.N2 C O2/ 29=44, where h is the elevation, and 29 and 44 are
the molecular weights of nitrogen–oxygen and carbon dioxide atmospheres, respectively.
Such temperature distributions are shown in Figure 1. In this ï¬gure, the graph of temperature distribution for the carbon dioxide troposphere lies below the graph of distribution
for the nitrogen–oxygen atmosphere. Thus, the near-surface temperature for the carbon
dioxide atmosphere is 6.4
ı
C lower than that for the nitrogen–oxygen atmosphere and not
considerably higher as some scientists continue to believe. Therefore, the accumulation
of carbon dioxide in great amounts in atmosphere should lead only to the cooling of
climate, whereas insigniï¬cant changes in the partial pressure of CO2 (few hundreds of
ppm) practically would not influence the average temperature of atmosphere and the
Earth’s surface.
Similarly, if one assumes that the existing carbon dioxide atmosphere of Venus is
entirely replaced by the nitrogen–oxygen atmosphere at the same pressure of 90.9 atm,
then its surface temperature would increase from 735 to 796 K. Thus, increasing the
saturation of atmosphere with carbon dioxide (despite its radiation absorbing capacity),
with all other conditions being equal, results in a decrease and not an increase of
the greenhouse effect and a decrease in average temperature of planet’s atmosphere.
As for Venus. its included in the last paragraph.
http://ruby.fgcu.edu/courses/twimberley/EnviroPhilo/CoolingOfAtmosphere.pdf