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View Full Version : Break Up of Antarctic Ice Shelf



Fraser
2008-Mar-28, 02:50 PM
If anyone is denial about climate change possibly occuring on Earth, please take a look at this. This animation highlights the rapid loss of ice recently on the Wilkins Ice Shelf in Antarctica. Between February 28 and 29, 2008 an area of about 400 sq km disintegrated into large and small icebergs within [...]

More... (http://www.universetoday.com/2008/03/28/break-up-of-antarctic-ice-shelf/)

Sean Clayden
2008-Mar-28, 03:11 PM
The earth is warming up regardless of human intervention. Human intervention has only accelerated it. Would happen anyway whether we were here or not.

GOURDHEAD
2008-Mar-29, 02:39 AM
There are a number of currents active in each of the Earth's oceans which can transfer heat and provide erosion of ice from the dynamics of the water currents even if the global average temperature of the Earth did not change. My guess is that the average global temperature is increasing but I have not seen a credible presentation of the upper and lower bounds on the rate of increase. There's a difference between questioning what the rate of change of the global average temperature is and what are the various causes and effects of ice accumulation in various places on the Earth's surface. The problem is of such significance that we really need to understand its size, cause, and most likely corrective action before we launch solutions.

Jerry
2008-Mar-30, 02:23 AM
The problem is of such significance that we really need to understand its size, cause, and most likely corrective action before we launch solutions.
Should we have taken this approach with ozone depletion? We had a theory that chloro-flourocarbons would deplete the ozone, and that the depletion would happen first in the polar regions, even thought most of the chloro-flourocarbons were generated in the temperate zones. Holes developed and spread in the southern hemisphere, the world acted, limiting flouro-chlorocarbon producting, and hole growth was mitigated.

The theory behind greenhouse gasses if very similar; and the polar regions are recording the greatest temperature changes. Worse still, diminishing the annual snowpack is a positive feedback mechanism: The lower the albedo, the less energy reflected into space. We are at least twenty years late addressing this painfully obvious, even if inconvenient, truth.

dirty_g
2008-Mar-30, 08:32 AM
Thats mankind for you. Too little too late.

aurora
2008-Mar-31, 05:12 PM
The earth is warming up regardless of human intervention. Human intervention has only accelerated it. Would happen anyway whether we were here or not.


Well, no. We're already past where we were in all of the recent interglacial periods.

So unless you have some way to predict that this current interglacial would have been warmer than the previous four (or so), I don't see how you could make such a statement.

JustAFriend
2008-Apr-01, 01:30 AM
If anyone is denial about climate change possibly occuring on Earth....


And it's really inconvenient if your in denial that the Antarctic ice may actually be INCREASING....

http://www.nasa.gov/lb/vision/earth/environment/sea_ice.html

http://www.space.com/scienceastronomy/antarctic_020822.html

http://rds.yahoo.com/_ylt=A0geu5uuj_FHwjYA4CtXNyoA;_ylu=X3oDMTEzaWo5b3F iBHNlYwNzcgRwb3MDNARjb2xvA2FjMgR2dGlkA0gxMDNfMTIy/SIG=12e3qflqi/EXP=1207099694/**http%3a//www.gsfc.nasa.gov/topstory/20020820southseaice.html


:whistle:

Jerry
2008-Apr-01, 01:45 AM
Old articles, always always dragged out (yes five, seven and three years is old in global thermal data), just as the 'satellite temperature' data was for a decade before the authors admitted to calibration errors.

We now know that when polar ice shelfs melt; the oceans rise near the equator, and may even become slightly more shallow near the poles as the gravimetric centroid shifts toward a fatter belly.

Nothing is as simple as 'feel good about doing nothing' political spin artists would like to see it painted. This is our only planet to live on. We need to be more careful with it.