Other
Scientific paper
Aug 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.7295e&link_type=abstract
Journal of Geophysical Research, vol. 87, Aug. 20, 1982, p. 7295-7302. NASA-supported research
Other
23
Climatology, Continents, Greenhouse Effect, Long Term Effects, Solar Terrestrial Interactions, Air Water Interactions, Atmospheric Heat Budget, Carbon Dioxide, Ice, Secular Variations, Stellar Luminosity
Scientific paper
We examine the various mechanisms which have been proposed to compensate for the climatic effects of a 30% increase in the solar luminosity over the past 4 1/2 billion years. Although atmospheric greenhouse effects have received most attention, other mechanisms may have played a role of comparable importance. In particular, we note that the development of continents during the past 2 1/2 billion years could have had a significant secular effect on the atmosphere-ocean heat transport system. As a result, past climates may have been less susceptible to complete freeze-over. A simple energy balance model is used to demonstrate the magnitude of this effect. Because the CO2 greenhouse effect is not the only means of compensating for solar evolution, the faint-young-sun problem should not be used to infer past levels of atmospheric CO2.
Endal Andrew S.
Schatten Kenneth H.
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