lp21why, on 10 March 2011 - 10:49 AM, said:
Those numbers are completely off, we actually go through climate change on a regular basis - it's only been roughly 14kyrs since the last glacial maximum, after that there was rapid warming called the Windermere Interstadial followed by rapid cooling in the Loch Lomond readvance. Before the last glacial period we had another interglacial (around 115kyrs ago), and another glacial before that, etc. This goes back about 2.6 million years.
The difference between the rapid warming 14k and 11kyrs ago and today is we aren't coming out of glacial conditions - ergo something is likely different.
This article is about a generic geological period of temperature reduction. For the prehistoric era commonly referred to as the Ice Age, see Pleistocene
Pleistocene
The Pleistocene is the epoch from 2.588 million to 12,000 years BP covering the world's recent period of repeated glaciations. The name pleistocene is derived from the Greek and ....
(geology) or PaleolithicPaleolithicThe Paleolithic Age, Era or Period, is a prehistoric era distinguished by the development of the first stone tools, and covers roughly 99% of human technological history...
(archaeology).
An "ice age" or, more precisely, "glacial age" is a generic geological period of long-term reduction in the temperatureTemperatureTemperature is a physical property that quantitatively expresses the common notions of hot and cold. Objects of low temperature are cold, while various degrees of higher temperatures are referred to as warm or hot....
of the EarthEarthEarth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
's surface and atmosphere, resulting in the presence or expansion of continental ice sheetIce sheetAn ice sheet is a mass of glacier ice that covers surrounding terrain and is greater than 50,000 km² , thus also known as continental glacier...
s, polar ice sheets and alpine glacierGlacierA glacier is a large persistent body of ice. Originating on land, a glacier flows slowly due to stresses induced by its weight. The crevasses and other distinguishing features of a glacier are due to its flow. Another consequence of glacier flow is the transport of rock and debris abraded from its...
s.
http://www.absolutea.../topics/Ice_age
(last time i checked there were still ice sheets on antarctica, greenland and parts of north america. i am sure there are some on asia and europe. lets not count the mountain ones. in the lower 48 or in the alps or in india.
http://schools-wikip...2/13241.png.htm
this is a table dont know how to get it here so go look.
you will see that we are at the peak of the current warm period. nore is the co2 lvls any higher today than they have been in the past at those peaks. well higher than some and the same with others.
i have failed at everything, but i keep trying.