Sentences with phrase «faint young sun»

Richard Lindzen, on page 19 of his new new paper titled «Can thin cirrus clouds in the tropics provide a solution to the Faint Young Sun paradox?»

I did recently read Lindzen's paper on the Faint Young Sun paradox, and a possible resolution involving cirrus clouds.

The solution to this «faint young Sun paradox» appears to lie in the presence of unusually high concentrations of greenhouse gases at the time, particularly methane and carbon dioxide.

Three areas of particular interest and debate are the «faint young Sun paradox,» the role of organisms in shaping Earth's atmosphere, and the possibility that Earth went through one or more «snowball» phases of global glaciation.

Solutions to the «faint young sun» paradox almost always involve the longer term changes in CO2 and CH4.

Or that with your estimate the faint young sun paradoxon would be a real paradoxon.

Dear Nir Shaviv, I would be glad to receive your comment about the recent paper from Andrew C. Overholt et al 2009 ApJ 705 L101 - L103 doi: 10.1088 / 0004 - 637X / 705 / 2 / L101 TESTING THE LINK BETWEEN TERRESTRIAL CLIMATE CHANGE AND GALA Does it mean - the spiral arm mechanism you suggest does nt fit - can some other mechanism explain your measurements and hypothesis - does this have an impact on the cosmic ray climate theory or not If we talk about the paradox of the faint young sun, imho its still an issue that any mechanism solving the problem of the major ice ages occuring each 140 million years in the last billion, does nt work for the first 3 billion years.

[Note: readers, see this recent story on WUWT from Stanford that shows Greenhouse theory isn't needed in the faint young sun paradox at all — Anthony]

The original proposition to resolve the Faint Young Sun Paradox by WeiJia Zhang of Peking University concerned the relevance of Hubble expansion flow in affecting the mean distance between the Sun and the Earth over geological time.

Can you please check, in «Six degrees» the question that asks to explain the faint young sun paradox?

Then, you still insist on resolution of the Faint Young Sun paradox withing the paradigm of greenhouse gases.

The Faint Young Sun paradox can not be resolved without the warming effect of greenhouse gases.

I mentioned that, and the Faint Young Sun, only to show that you are wrong in your assertion that the geological data shows that the Earth can only change in narrow ranges.

(For that matter, ever heard of the Faint Young Sun problem?)

Lindzen says that the Faint Young sun paradox can be resolved by adding clouds to the Earth and that this is evidence of a negative feedback.

Within that range of atmospheric density, even higher concentrations of carbon dioxide wouldn't have been adequate to counteract the faint young sun, suggesting that methane, ethane or other strong greenhouse gases kept Earth from freezing.

Climate models suggest that our planet should have been frozen over at the time, yet there is geological evidence for liquid water aplenty — a disparity that planetary scientists have dubbed the faint young sun paradox.

«The «faint young sun» paradox remains,» says Som.

Wet Earth Erin Wayman's article «Faint young sun» (SN: 5/4/13, p. 30), about how the early Earth stayed warm enough for liquid water, made me wonder about the effect of the temperature of the planet itself.

They weren't, and this «faint young sun paradox» has puzzled scientists for decades.

«Earth's hydrosphere, if it even existed at the Hadean time, may have been frozen all the way down, which would have all but eliminated tidal dissipation or friction,» Zhong said, adding that a weaker, fainter young Sun could have made such conditions possible in theory.

Similar ideas have also addressed the possibility of a fainter young Sun, but direct observational evidence in the geological record is currently lacking, making it the subject of debate among scientists.