how hot will the earth get by the year 2100

[budweiserlea]

by the year 2100, how much do scientists believe the earth will warm by ?

[brachiopod]

Although impossible to measure directly, and estimates vary greatly, the temperature at the inner-outer core boundary is in the region of 4500 - 5750 �C, whilst at the core-matle boundary, between 2500 and 3500 �C.

It is not expected to get much warmer in the next hundred years.

[jake-the-peg]

Lots of different figures about between 2 and 5 degrees seems likely.

London (Greenwich) has an average July temperature of 17 degrees if it has an average of 22 degrees that would be close the average temperature to what Marseille currently gets.

Marseille would be close to Cairo, Florida will be close to Saudi Arabia.

Of course that's over simplistic but you get the general idea

[jake-the-peg]

Assuming that budweiserlea was referring to climate take my answer - if referring to the earth as a Geological entity see braciopod's reply

[bustergutt]

I saw Time Team CH4 the other night, they were digging in an old gravel pit in Oxfordshire, one of the experts found fossiliszed beetle remains and explained that the species are around today and are found in Spain. He said they were here in England thousands of years ago as the climate then was a lot warmer. Well considering there were no pollutants in the air then, can`t we say that Global Warming is nothing new! Also this weather cycle is not coming fast enough for me, I had to spend a small fortune this year to go to Spain for some decent weather.

[jake-the-peg]

No we can't Buster

There are cycles relating to the Earth's orbit and the sun's output.

The current concern is based on the claim that the most recent cycle of warming is not explained by these and is due to our activity.

If that's the case and we do nothing it will not be a cycle like before but an ever increasing rise.

Regardless of whether or not it's man made it's ceratinly real and there is likely to be a lot more serious consequences than less people taking foreign holidays

[ugly_bob]

but there is no definitve proof that this is happening - scientists disagree.
only around 2% of atmospheric CO2 is from humans - the remainder from natural causes.
And apparently now, it has been suggested that reduction in sunspot activity will counteract any warming caused by 'the greenhouse effect'

[jake-the-peg]

Woah there bob

Nobody that I know seriously disagrees that the Eath is warming.

The disagreement is whether it is caused by human activity

[ugly_bob]

sorry, that is what i meant.
the latest thing i've heard though is that it will be nullified by reduced solar activity.
Not read much about that though, so don't know how valid/likely it is.

[jake-the-peg]

Well that's a bit tough to believe, sunspots follow an 11 year major cycle and have been pretty heavily studied ever since Galileo's time. I'd be surprised if there was something that major that was not already included in the existing climate models.

What we do know for sure is that glaciers are at their smallest for many hundreds of years possibly thousands of years

The 2% human contribution issue is misleading because although it's small it's not in balance.

Every year we put in 6 billion tons but only 3 billion are removed.

In TOTAL green house gasses are up 25% in the last 150 years.

And these are figures from the American Department of Energy not the Guardian

http://www.eia.doe.gov/oiaf/1605/ggccebro/chap ter1.html

So pretty much everybody's agreed the planets going to get warmer the only question is whether or not we're going to seriously try to do something about it or whether we're going to put our trust in sunspots.

[ugly_bob]

sunspots.
even the Americans are admitting gasses are up? they need to condsider signing up to all these global conventions to reduce the output really.
I do quite fancy living a mediteranean lifestyle without moving there though... Just need to work out how to live another hundred years.

[budweiserlea]

thanku

[adonia]

very well said ugly-bob(me too)

swedes are very well up on it though

rather go on their calculations

[Dr. Chaos]

What about Al Gore's documentary "An Inconvenient Truth" were he asserts that we will reach a "point of no return" in the next 10 years ? I think the truth of the matter is we are doing a crazy experiment on a planetary sized system that we neither completely understand nor are capable of mitigating in any reasonable amount of time (i.e. before the warming effects have caused much grief for our planet's inhabitants for many decades) . Another distinct possibility is melting of arctic ice may so dilute the North Atlantic that the sea currents that carry heat from the equator to the northern latitudes may stall out causing a mini ice age of several decades before a bout of global heat and drought ensues. Bottom line- we need to stop with the archaic fossil fuel burning in our circa 1900 machines ( petrol cars and coal power plants) and we need to do it real soon. This is a passion of mine and I welcome comments.

[shri]

i think it won't make any sense to talk about that right now...
its time to discuss about what has to be done inorder to help our dear earth to face 2100...let us form a community and discuss the issue more seriously....