The Naked Scientists

The Naked Scientists Forum

Author Topic: new ice age  (Read 8690 times)

Offline tnjed123

  • First timers
  • *
  • Posts: 1
    • View Profile
new ice age
« on: 16/07/2006 13:37:34 »
I have read several articles postulating that if the saline concentration of the Gulf stream current continues to drop Europe and North America may experience another ice age. What information can you provide on this hypothesis and what is the latest information on this phenomenon?[8D]


 

Offline jysk

  • Jr. Member
  • **
  • Posts: 41
    • View Profile
Re: new ice age
« Reply #1 on: 18/07/2006 03:38:16 »
I remember reading something about a fellow who thought we should construct a dam across the Straight of Gibraltar to prevent another ice-up episode. I'm sure other forum members have heard this one.

I think the theory was that super-salty Mediterranean seawater would spill into the Atlantic Ocean somehow and because it is more dense, plunge right down to the bottom. This will force very cold water from the bottom of the Atlantic, up. The consequence is that precipitation that normally forms and falls on England as rain will form further west and fall on Northern Canada as snow. The problem is that the old snow won't melt before new snow falls. There is more to it then that, but those are the key points that I can recall. A clever thought really.

Your original post is asking for opinions of something completely different but it reminded me of this idea.

Mike
 

Offline VAlibrarian

  • Sr. Member
  • ****
  • Posts: 173
    • View Profile
Re: new ice age
« Reply #2 on: 26/07/2006 01:55:27 »
Tim Flannery in his book the Weather MAkers seemed to feel that a collapse of the Gulf Stream is not that likely as a result of global warming. Other results of global warming such as coral deaths, floods, extinctions of polar bears, increased hurricane activity, seemed more likely to him.

chris wiegard
 

Offline ukmicky

  • Neilep Level Member
  • ******
  • Posts: 3011
    • View Profile
    • http://www.space-talk.com/
Re: new ice age
« Reply #3 on: 26/07/2006 23:07:08 »
I read once but cant think where that the possibility does exist that if it wernt for us pumping all that crap into the atmosphere we could be on our way now towards another ice age.

Michael
 

Offline jysk

  • Jr. Member
  • **
  • Posts: 41
    • View Profile
Re: new ice age
« Reply #4 on: 27/07/2006 00:02:47 »
Ya, I remember that too. It had something to do with "dimming". I don't recall the mechanics of it though.

Mike
 

another_someone

  • Guest
Re: new ice age
« Reply #5 on: 27/07/2006 00:48:20 »
Global dimming (caused by particulate matter we used to throw up into the atmosphere) did certainly cool down the global temperature slightly, and by cleaning up some of the pollution, we actually have caused an increase in temperature.

There have been lots of extrapolations looking at historic cycles of warm and cold periods (incidentally, technically we are still in an ice age, but simply not in the deepest depths of it) that indicated that enough time has elapsed that any time soon the temperature should start cooling again.  So far, none of the indicators seem to indicate that, with or without human activity, the Earth is ready to start cooling quite yet – but who can tell in another 10, or 50, or 100, or 500 years?



George
 

Offline crandles

  • Full Member
  • ***
  • Posts: 54
    • View Profile
Re: new ice age
« Reply #6 on: 29/07/2006 19:17:04 »
Try

http://www.realclimate.org/index.php?p=225

and

http://www.realclimate.org/index.php/archives/2006/01/atlantic-circulation-changes/

quote:

Everyone quoted is however agreed on one thing: "the notion that [a future change in the themohaline circulation] may trigger a mini ice age is a myth”.
 

Offline ukmicky

  • Neilep Level Member
  • ******
  • Posts: 3011
    • View Profile
    • http://www.space-talk.com/
Re: new ice age
« Reply #7 on: 26/07/2006 23:07:08 »
I read once but cant think where that the possibility does exist that if it wernt for us pumping all that crap into the atmosphere we could be on our way now towards another ice age.

Michael
 

Offline jysk

  • Jr. Member
  • **
  • Posts: 41
    • View Profile
Re: new ice age
« Reply #8 on: 27/07/2006 00:02:47 »
Ya, I remember that too. It had something to do with "dimming". I don't recall the mechanics of it though.

Mike
 

another_someone

  • Guest
Re: new ice age
« Reply #9 on: 27/07/2006 00:48:20 »
Global dimming (caused by particulate matter we used to throw up into the atmosphere) did certainly cool down the global temperature slightly, and by cleaning up some of the pollution, we actually have caused an increase in temperature.

There have been lots of extrapolations looking at historic cycles of warm and cold periods (incidentally, technically we are still in an ice age, but simply not in the deepest depths of it) that indicated that enough time has elapsed that any time soon the temperature should start cooling again.  So far, none of the indicators seem to indicate that, with or without human activity, the Earth is ready to start cooling quite yet – but who can tell in another 10, or 50, or 100, or 500 years?



George
 

Offline crandles

  • Full Member
  • ***
  • Posts: 54
    • View Profile
Re: new ice age
« Reply #10 on: 29/07/2006 19:17:04 »
Try

http://www.realclimate.org/index.php?p=225

and

http://www.realclimate.org/index.php/archives/2006/01/atlantic-circulation-changes/

quote:

Everyone quoted is however agreed on one thing: "the notion that [a future change in the themohaline circulation] may trigger a mini ice age is a myth”.
 

Offline mark71

  • Jr. Member
  • **
  • Posts: 17
    • View Profile
new ice age
« Reply #11 on: 02/06/2007 02:51:33 »
try...

eurl=
 

The Naked Scientists Forum

new ice age
« Reply #11 on: 02/06/2007 02:51:33 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums