Has the Earth suffered through a runaway greenhouse effect at least once in the past 4 billion years
Favorites|Homepage
Subscriptions | sitemap
HOME > > Has the Earth suffered through a runaway greenhouse effect at least once in the past 4 billion years

Has the Earth suffered through a runaway greenhouse effect at least once in the past 4 billion years

[From: ] [author: ] [Date: 12-11-19] [Hit: ]
During the period 3.0–0.8 million years ago, the dominant pattern of glaciation corresponded to the 41,000-year period of changes in Earths obliquity (tilt of the axis). The reasons for dominance of one frequency versus another are poorly understood and an active area of current research,......

While Milankovitch forcing predicts that cyclic changes in the Earth's orbital elements can be expressed in the glaciation record, additional explanations are necessary to explain which cycles are observed to be most important in the timing of glacial–interglacial periods. In particular, during the last 800,000 years, the dominant period of glacial–interglacial oscillation has been 100,000 years, which corresponds to changes in Earth's orbital eccentricity and orbital inclination. Yet this is by far the weakest of the three frequencies predicted by Milankovitch. During the period 3.0–0.8 million years ago, the dominant pattern of glaciation corresponded to the 41,000-year period of changes in Earth's obliquity (tilt of the axis). The reasons for dominance of one frequency versus another are poorly understood and an active area of current research, but the answer probably relates to some form of resonance in the Earth's climate system...."

http://en.wikipedia.org/wiki/Ice_age

-
The answer to this is (A). However, There is a lot of debate on whether there can be a possible Runaway Greenhouse effect to Earth in the future.

To know more, study the works of Dr. James Hansen and Sir John Houghton.
12
keywords: Earth,at,effect,past,Has,suffered,years,runaway,in,least,billion,once,the,through,greenhouse,Has the Earth suffered through a runaway greenhouse effect at least once in the past 4 billion years
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .