Sentences with phrase «snowball earth atmospheric»
Abbot DS, Voigt A, Li D, Le Hir G, Pierrehumbert RT -LCB- \ it et al -RCB- 2013: Robust elements of Snowball Earth atmospheric circulation and oases for life.
http://geosci.uchicago.edu/ Not exact matches
His «we do not know of a time with permanent ice at the poles and CO2 above 1000pmmv» (except, of course, prior to the big thaw in snowball Earth), and the present rate of increase of atmospheric CO2 being c. 10x greater than previous mass extinctions as far as we know (albeit the total mass being less) are deeply worrying.
The Snowball Earth hypothesis maintains that the severe freezing in the late Proterozoic was ended by an increase in CO2 levels in the atmosphere, and some supporters of Snowball Earth argue that it was caused by a reduction in atmospheric CO2.
Finally the conclusion that chemical weathering has a greater impact on the reduction in the atmospheric CO2 during a Earth Snowball event then biologic functions seems slightly humorous to me...; however, if you can support the idea I would entertain looking at the data.
If it weren't for the atmospheric window emitting at higher intensity, this emitting layer would reach the snowball earth temp of about 255K, at which the outgoing IR balances incoming sun light.
The equilibrium response of the control run (1950 atmospheric composition, CO2 approx. 310 ppm) and runs with successive CO2 doublings and halvings reveals that snowball Earth instability occurs just beyond three CO2 halvings.
The fact that the earth appears to have gone through huge changes in atmospheric CO2 concentration over geologic eras, while the estimated temps went from 12degC to 22 deg C regardless of «Snowball Earth» or «Cretaceous Hot House» with both hot and cold periods occurring during both high and low CO2 regimes and both with and without ice caps argues very strongly that we do not understand the climate mechanism atearth appears to have gone through huge changes in atmospheric CO2 concentration over geologic eras, while the estimated temps went from 12degC to 22 deg C regardless of «Snowball Earth» or «Cretaceous Hot House» with both hot and cold periods occurring during both high and low CO2 regimes and both with and without ice caps argues very strongly that we do not understand the climate mechanism atEarth» or «Cretaceous Hot House» with both hot and cold periods occurring during both high and low CO2 regimes and both with and without ice caps argues very strongly that we do not understand the climate mechanism at all.