The Naked Scientists

The Naked Scientists Forum

Author Topic: Global Warming  (Read 4258 times)

Offline simeonie

  • Sr. Member
  • ****
  • Posts: 351
    • View Profile
    • http://www.simeonie.co.uk
Global Warming
« on: 09/06/2005 21:17:26 »
Ye I was wondering about global warming...... I don't really know much about it but is the danger of it that the world could flood because of the ice burgs melting?

If so then I was thinking........ because virtually all of an ice burg is below the water wouldnt u think that the water level would decrease because ice expands when it....... well becomes ice.

So if/when all the ice melts it will all turn to water and take up less space. The ice that was on top of the water would fall into the water as water but because there was soooo much ice underwater that decreased in size it wouldnt make a difference.

Right please tell me if you don't have a clue what I am on about because it is SOOO much easier to explain when I am talking face to face with someone and drawin pictures. But I can't do that for you lot. I just wanted to know an expert opinion really. THANKS!

----------------------
-__- my website!!!!
http://www.simeonie.co.uk
has forums too!
Think about it! lolz


 

Offline rosy

  • Neilep Level Member
  • ******
  • Posts: 1018
  • Chemistry
    • View Profile
Re: Global Warming
« Reply #1 on: 09/06/2005 22:28:37 »
The reason why melting ice will cause an increase in sea levels is that a lot of the ice isn't currently floating. The arctic melting won't (I think? someone?) cause increased sea level, as the polar ice there is just floating... but antarctica is actually a continent (like, with land under it) and so if the ice melts and the water runs off into the sea (or even if the ice just falls off and starts floating) then that will cause an increase in sea level.
The flooding issue isn't the only danger with global warming, climate change is expected to have profound effects on the climate in areas around the world, with increases in rain fall in some places, much dryer weather in others, having devastating effects on agriculture and/or biodiversity.
 

Offline simeonie

  • Sr. Member
  • ****
  • Posts: 351
    • View Profile
    • http://www.simeonie.co.uk
Re: Global Warming
« Reply #2 on: 10/06/2005 08:06:35 »
Oh right! Thanks for that Rosy...... So is global warming a big threat? Because global cooling is happening at the same time. I do not know much about global cooling but it is affected/caused by aeroplanes leaving there traily things behind and the suns rays get relected back out into space. If anyone knows much about global cooling then please say. TA!

----------------------
-__- my website!!!!
http://www.simeonie.co.uk
has forums too!
Think about it! lolz
 

Offline chris

  • Neilep Level Member
  • ******
  • Posts: 5339
  • Thanked: 65 times
  • The Naked Scientist
    • View Profile
    • The Naked Scientists
Re: Global Warming
« Reply #3 on: 10/06/2005 09:36:34 »
This should be in the science section really, not the chill out / chat section. I'll move it shortly.

Chris

"I never forget a face, but in your case I'll make an exception"
 - Groucho Marx
 

Offline simeonie

  • Sr. Member
  • ****
  • Posts: 351
    • View Profile
    • http://www.simeonie.co.uk
Re: Global Warming
« Reply #4 on: 10/06/2005 21:35:54 »
Oh right soz bout that. I was just really curious bout it. So does anybody know anything about global cooling?

----------------------
-__- my website!!!!
http://www.simeonie.co.uk
has forums too!
Think about it! lolz
 

Offline daveshorts

  • Moderator
  • Neilep Level Member
  • *****
  • Posts: 2583
  • Physics, Experiments
    • View Profile
    • http://www.chaosscience.org.uk
Re: Global Warming
« Reply #5 on: 11/06/2005 09:55:47 »
quote:
Oh right! Thanks for that Rosy...... So is global warming a big threat? Because global cooling is happening at the same time.


That is a seperate question,
because a floating thing displaces its own weight of water a 1 tonne iceberg will displace 1tonne of water - so if it melts into 1 tonne of water it will still displace 1 tonne of water -> no sea level rise.

if the ice is sitting above sea level in an ice sheet and this melts, it will run down the hill and effectively add more water to the sea => increasing the sea level.

The other way that global warming increases sea level is that if you heat up water itself it will expand, so if you heat up a sea it will take up more space => sea level rise.

The big problem with global warming isn't really what sort of world we will end up with but the change itself. We could probably live perfectly happyly in a world 2-3 degrees warmer, however the good places to live will be different to where people are living at the moment, as wet places will get dry, cold places hot, comfortable places far too hot, seashores become underwater etc. However moving the several billion people to the new fertile places would be extreemly interesting....

 

The Naked Scientists Forum

Re: Global Warming
« Reply #5 on: 11/06/2005 09:55:47 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums
 
Login
Login with username, password and session length