Ice caps melting

[empip]

...Jørgen Peder Steffensen is an Associate Professor at the University of Copenhagen and one of the world’s leading experts on ice cores. Using ice cores from sites in Greenland, he has been able to reconstruct temperatures there for the last 10000 years. So what are his conclusions?
Temperatures in Greenland were about 1.5 C warmer 1000 years ago than now.
It was perhaps 2.5 C warmer 4000 years ago.
The period around 1875, at the lowest point of the Little Ice Age, marked the coldest point in the last 10,000 years.
Other evidence from elsewhere in the Northern Hemisphere confirms this picture.

His final comment :-

I agree totally we have had a global temperature increase in the 20thC – but an increase from what? ..Probably an increase from the lowest point in the last 10,000 years.
We started to observe meteorology at the coldest point in the last 10,000 years...

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[Deleted member 63160]

What's that? Climate change has been happening for millions of years? You mean it didn't start 150 years ago when men made a steam train? Like it happens anyway? Cripes, you mean our taxes aren't really saving the polar bears? We're still in the 5th major ice age? Theres been thousands of times the earth has got colder then warmed up again over billions of years? Wow I wouldn't wanna be one of those hand wringing lefty tossers when this gets out....

 

[Deleted member 63160]

If global warming (oops, sorry, 'climate change') is, in fact, occurring...

"If?"

Are you suggesting that it isn't?

I think everyone knows the weather changes. It's just some pretend man has some kind of power to change it. Then tax you. We are fleas on the camels back mate. Get over it.

 

[Norcon]

When the sun eventually blows the ice will all melt.

 

[JohnD]

I think everyone knows the weather changes.

Ah, I see. You don't know the difference between "weather" and "climate"

 

[Deleted member 63160]

I think everyone knows the weather changes.

Ah, I see. You don't know the difference between "weather" and "climate"

Yeah I do. So you don't see, you were wrong. Man can't change either. It's been going on for a while.

 

[JohnD]

Man can't change either. It's been going on for a while.

That's interesting.

What was the fastest change (in degrees C per century) in the last ten thousand years?

 

[Deleted member 63160]

edit

 

[AronSearle]

Man can't change either. It's been going on for a while.

That's interesting.

What was the fastest change (in degrees C per century) in the last ten thousand years?

Ah the ole "speed" argument.

Temperatures have risen by <1c, please explain how the speed makes a difference?

 

[jeds]

I think everyone knows the weather changes.

Ah, I see. You don't know the difference between "weather" and "climate"

Standard mantra of the global alarmist. When it's freezing your nuts off it's just weather. When it's a tad on the warm side it's global warming.

 

[Deleted member 63160]

Man can't change either. It's been going on for a while.

That's interesting.

What was the fastest change (in degrees C per century) in the last ten thousand years?

Ah the ole "speed" argument.

Temperatures have risen by <1c, please explain how the speed makes a difference?

I read that it's a few degrees cooler than 4000 yrs ago. All this taking stats from the last few thousand years is irrelavant though I think. It's got real hot then real cold many times for millions of years. It ain't new.

 

[Brigadier]

One major problem is if enough ice melts at the North Pole it's capable of stopping the conveyor belt aka the Gulf Stream, this is due to fresh water floating on salt water, the result of which is the UK would become a frozen waste land similar to Canada which is on the same latitude as us but don't get the warmth of the G.S.

Cobblers.

http://en.wikipedia.org/wiki/Vancouver#Climate

Same(ish) latitude as much of UK, and pretty comparable to UK in terms of distance from sea.
Same(ish) climate - not too cold, not too hot, piddles down a lot - sod all to do with "the Gulf Stream".

http://all-geo.org/highlyallochthon...even-scientists-are-afflicted-by-urban-myths/

 

[EFLImpudence]

Isn't that because Vancouver benefits from a similar current and both would be colder without these?

 

[empip]

Science 9 July 1971:
... increase by only a factor of 4 in global aerosol background concentration may be sufficient to reduce the surface
temperature by as much as 3.5 ° K. If sustained over a period of several years, such a temperature decrease over the
whole globe is believed to be sufficient to trigger an ice age...
-------------------------------------------------------------------------------
TIME Magazine Archive Article -- Another Ice Age? -- Jun. 24, 1974
... As they review the bizarre and unpredictable weather pattern of the past several years, a growing number of scientists
are beginning to suspect that many seemingly contradictory meteorological fluctuations are actually part of a global
climatic upheaval. However widely the weather varies from place to place and time to time, when meteorologists take
an average of temperatures around the globe they find that the atmosphere has been growing gradually cooler for the
past three decades. The trend shows no indication of reversing. Climatological Cassandras are becoming increasingly
apprehensive, for the weather aberrations they are studying may be the harbinger of another ice age...
----------------------------------------------------------
NEWSWEEK article (on p.64) April 29, 1975 - "The Cooling World" by Peter Gwynne
http://www.perceptions.couk.com/imgs/cooling1.pdf

Untitled

• empip
• 17 Nov 2014
• 1

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Earth approx' 4.5 bilion yrs old.
Present cycle of ice ages began about 40 million yrs ago.
Thermometer records started about 150 yrs ago.
Satellite atmospheric temperature data 30 yrs ago.

150 / 40,000,000 = 0.000375%
Some perspective on those figures, 12.5 ft out of 631.3 miles.
Most data beyond 150 yrs ago is likely to be iffy, cherry picked tree rings, selective data to enhance a theme / fashion...

Don't forget the hockey schtick ! 'If it looks like a duck and quacks like a duck, then it very likely is a duck.'

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[Norcon]

But ice core data goes back thousands of years and is a well established and accurate science.
Antartic ice cores extend 800,000 years back into time.

Crucially, the ice encloses small bubbles of air that contain a sample of the atmosphere – from these it is possible to measure directly the past concentration of gases (including carbon dioxide and methane) in the atmosphere.

Google wrote..
"Antarctic ice cores show us that the concentration of CO2 was stable over the last millennium until the early 19th century..
It then started to rise, and its concentration is now nearly 40% higher than it was before the industrial revolution"

So what happened in the 19th century?

Again Google writes..

"Other measurements (e.g. isotopic data) confirm that the increase must be due to emissions of CO2 from fossil fuel usage and deforestation."