Greenhouse And Icehouse Earth
Over the geological History of the Earth the planet's climate has been fluctuating between two dominant states: the Greenhouse and the Icehouse. These two climate sets generally last for long periods of time (many millions of years) and should not be confused with glacial and interglacial periods, which only occur during an Icehouse period and tend to last less than 1 million years. The Earth's climate is on a continuing, uneven cycle between the two states, the main factors involved in these changes in paleoclimate are believed to be the concentration of atmospheric carbon dioxide, changes in the Earth's orbit, and oceanic and orogenic changes due to tectonic plate dynamics. Greenhouse and Icehouse periods have profoundly shaped the evolution of life on Earth.
Other articles related to "greenhouse and icehouse earth, icehouse":
... Currently, we are in an icehouse climate state ... About 34 million years ago, we started our icehouse state, as ice sheets began to form in Antarctica the ice sheets in the Arctic didn’t start ... Some processes that may have led to our current icehouse may be connected to the development of the Himalayan Mountains and the opening of the Drake Passage between South America and Antarctica ...
Famous quotes containing the words earth and/or greenhouse:
“I am not aware that any man has ever built on the spot which I occupy. Deliver me from a city built on the site of a more ancient city, whose materials are ruins, whose gardens cemeteries. The soil is blanched and accursed there, and before that becomes necessary the earth itself will be destroyed.”
—Henry David Thoreau (18171862)
“There is not enough exercise in this way of life. I try to make up by active gymnastics before I dress when I get up, by walking rapidly in the lower hall and the greenhouse after each meal for perhaps five to ten minutes, and a good hand rubbing before going to bed. I eat moderately; drink one cup of coffee at breakfast and one cup of tea at lunch and no other stimulant. My health is now, and usually, excellent.”
—Rutherford Birchard Hayes (18221893)