Global warming, true or false? Do these scientist' look at history when they make claims of Global Warming?

Question

Rewind the clock about 1500 years. What was the world doing then? Waters where rising and lands where being flooded. Causing mass migrations of people in to higher grounds. Or in Englands case across the Chanel. The people where the Algles, creating what we know today as Alglo-Saxon England.
This is documented in history, we have archaelogical evadence showing us this. Was the flooding due to Global Warming? There where fewer people in the world, yet the world was going through the same process of warming and extreem weather as it is right now.
I want to know if modern scientist take history into account or if they even bother with it.

Answer 1

Over the last 10000 years, climate hasn't changes much at all. It's only when you narrow the data to the last 100 years, you see a very small increase of just 1 deg over the last 100 years.

Narrow the data even further, say sample just the last 20 years, and yes, there is a slight warming trend.

But 20 years in the history of the Earth is nothing. This is selective science at its worst.

Answer 2

They absolutely take it into account.

But the data shows that the warming of the last 100 years or so is very different. This is a good simple picture:

http://www.globalwarmingart.com/wiki/Image:2000_Year_Temperature_Comparison_png

Another factor is that, in the past warming started for other reasons and CO2 followed after a lag of hundreds of years. This time, there is no lag because CO2 is (mostly) causing the warming.

More stuff about history and the present, (and further proof that this has not been overlooked):

http://environment.newscientist.com/channel/earth/climate-change/dn11645

So the data shows that this time is different, in those and other ways. That's why there's such a fuss about this now.

Good websites for more info:

http://profend.com/global-warming/
http://environment.newscientist.com/channel/earth/dn11462

Vladoviking - It's true that we don't compare much past 2000 years. One reason is that the data is uncertain. But that's far enough to show something unusual is going on. In the distant past of course, the Earth was much warmer. But we're not nomads who can just relocate in response to climate.

"We humans have built a remarkable socioeconomic system during perhaps the only time when it could be built, when climate was sufficiently stable to allow us to develop the agricultural infrastructure required to maintain an advanced society."

EDIT - Larry - The graph I cited clearly shows the Medieval Warm Period.

Answer 3

Yes, they do look at history. If you look at books on geology or climatology or weather written 50 years ago, you will find that the authors were writing about global warming back then. I was reading George Gamow's book (written in 1946) on the History of the Earth, and there was a chapter on global warming. It's only recently since Gore made his film that politicians and the media are making such a big deal out of it. THEY should read the books on the scientific explanation of global warming, but no, they are promoting themselves, as usual.

Answer 4

Yes Global warming must be responsible for melting ice caps on mars and saturn also

Global warming is due to the sun

not due to co2, mt st helens which exploded with the power of 500 hiroshima's put out more co2 in 10 minutes than man has put out in 150 years

scientist work for the governments

Goverments want to take away your freedoms and reduce your life style and make you feel guilty for living a normal life

think

Answer 5

Yes they do , even if their retoric doesn't show in it. This world has been going through countless global warming cycles. The time it takes to get into, through, and out of the cycle is also taken into account. The one we are experiencing is happening quickly and may take some time to get out of. I doubt I'll need to be worried about it.LOL.

Answer 6

Climatologists use historical data and evidence to the best of their ability. This data is highly incomplete though, so most predictions focus on our more complete data from the last century.

They are very aware of natural climate cycles. There argument isn't just: "it's gotten a bit warmer, there's some extra C02, we must've done it!" There have been extensive studies on the role of greenhouse gases and how they can force climate change.

Answer 7

yes, the scientists look at history when they make claims of Global Warming....Global Warming is real, so you need to do anything you can to reduce it, but we are all going to die anyway, so i think that as along as we do whatever we can to stop it, then it's out of our control.....so just pray hard and hope for the best, also, do your part!

Answer 8

The Paleoclimate data going back thousands of years is rather interesting, makes the 100 year hockey stick chart the AGW proponents keep refering to look like a rather normal "day in the life of" planet climate.
AGWers seem to shy away from anything over a thousand years.

Who said I'm not a Nomad stayin in one place to long sucks

Answer 9

Yes, they looked at the historical record and they said, “we have to get rid of the Medieval Warming Period”. Enter the "Hockey Stick".

Answer 10

Let's hope "these scientists" DON'T look at history. We've seen what happens when the look at science.