The 1500 year climate cycle

[bioblitzkrieg]

1500-year climate cycle
From Wikipedia, the free encyclopedia


Some climatologists and climate modelers argue for a 1500-year climate cycle in the North Atlantic region.[1] In their view, many if not most of the Dansgaard-Oeschger events of the last ice age, conform to a 1500-year pattern, as do some climate events of later eras, like the Little Ice Age, the 8.2 kiloyear event, and the start of the Younger Dryas.

The hypothesis holds that the 1500-year cycle displays nonlinear behavior and stochastic resonance; not every instance of the pattern is a significant climate event, though some rise to major prominence in environmental history.[2] Causes and determining factors of the cycle are under study; researchers have focused attention on patterns of tides, variations in solar output, and "reorganizations of atmospheric circulation."[3]

Looking backward from the present, the following events appear to conform to a general 1500-year pattern. (Evidence is more problematic, and certainty weaker, farther back in time.)

700 years before the present (BP), or 1300 AD — the start of the Little Ice Age (by some calculations); the Great Famine of 1315–1317
2200 BP, or 200 BCE — ?
3700 BP, or 1700 BCE — ?
5200 BP, or 3200 BCE — the Piora Oscillation
6700 BP, or 4700 BCE — ?
8200 BP, or 6200 BCE — the 8.2 kiloyear event
9700 BP, or 7700 BCE — ?
11,200 BP, or 9200 BCE — ?
12,700 BP, or 10,700 BCE — the start of the Younger Dryas
14,200 BP, or 12,200 BCE — the Older Dryas.

Global warming skeptics have used the 1500-year climate cycle to argue against anthropogenic global warming[4] but the hypothesis itself exists independent of political considerations. One leading researcher in this area has been Dr. Gerard C. Bond of the Lamont-Doherty Earth Observatory at Columbia University.[5]

[Heretik]

This theory has little or no evidence. Scientist agree that ice ages do return in cycles but this is really weird.

Since we talk about ice age, do you maybe think that global warming is some kind of a start of another ice age? A symbol, let's say...

[bioblitzkrieg]

well things oscillate back and forth, from cold to warm and back again, like a pendulum in an old clock. I believe global warming trends occur naturally, just as global cooling trends occur naturally, however the speed and intensity that our current warming period is occuring at leads me to believe human industry has artificially sped up this process. So what might have taken centuries or millenia to take place may happen in under a century or two because of human activity. So might an unnaturally fast warming period lead to an unnaturally fast cooling period down the road? very possible, but the future is very hard to predict and im not a climatologist

[Heretik]

Well, it's more than likely we have speeded up the process but these moanings about global climate change that actually might be a part of a perfectly natural process are getting on my nerves.
Of course we should pay more attention to nature and it's preservation but moaning should stop and people should do something if they are so concerned.
My advice is: buy warm clothes!