2010-10-30 09:58:49Polar amplification question
Rob Honeycutt

robhon@mac...
98.207.62.223

 

I'm a little embarrassed that I don't know the answer to this.  What is the basic reasoning behind polar amplification?

I know this is what is predicted but I was just thinking about WV and CO2 and thinking, there is much less WV at the poles, so why would it not be the reverse?  Why wouldn't increased CO2 raise the level of WV and create more warming at the equator and less at the poles? 

2010-10-30 10:24:18
Rob Honeycutt

robhon@mac...
98.207.62.223

 

Ah.  I found a good article about it at Real Climate.

http://www.realclimate.org/index.php/archives/2006/01/polar-amplification/ 

2010-10-30 13:58:58albedo
dana1981
Dana Nuccitelli
dana1981@yahoo...
71.137.148.215
Yeah the short answer is melting ice = decreased reflectivity = amplified warming
2010-10-31 02:49:06
Rob Honeycutt

robhon@mac...
98.207.62.223

 

I was under the false impression before that polar amplification was both poles.  It's primarily the Arctic, with moderate Antarctic warming.  I was also getting stuck on the WV issue.  But, as you say Dana, polar amplification is about ice albedo.

2010-10-31 09:28:06
Riccardo

riccardoreitano@tiscali...
93.147.82.141
It's mainly ice albedo in present climate, you'd get some polar amplification anyways. It was already recognized by Arrhenius and seen in the Antarctic ice cores.
2010-11-04 08:58:41
Riccardo

riccardoreitano@tiscali...
93.147.82.189
An interesting paper on polar amplification I forgot to mention .
2010-11-04 10:18:30A new paper on arctic amplification hot off the presses
John Cook

john@skepticalscience...
124.186.160.198

Ari just tweeted this one yesterday:

Contribution of sea ice loss to Arctic amplification