phantom power
(1000+ posts)
Send PM |
Profile |
Ignore
|
Tue Feb-03-09 10:02 AM
Original message |
seminar: The Antarctic Conundrum: Sea Ice Expansion in a Warming World |
|
Dr. Xin Qu
Atmospheric & Oceanic Sciences
University of California – Los Angeles
They seem to be doing a series on climate change at UM.
Monday, February 9, 2009 3:30 – 4:30 pm 2246 Space Research Building
The Antarctic Conundrum: Sea Ice Expansion in a Warming World
The Antarctic climate is experiencing a puzzling change: Rapid warming in the Antarctic Peninsular coincides with sea ice expansion in the Southern Ocean. In this talk, I reconcile this apparent paradox. I exploit paleoclimate information preserved in antarctic ice cores and data from climate simulations without anthropogenic forcing to demonstrate that sea ice expansion in the Southern Ocean stems primarily from a strong mode of natural variability in the western Ross Sea. Elsewhere, significant Southern Hemisphere sea ice retreat is clearly seen, especially near the western side of the Antarctic Peninsula and in the southern Bellingshausen Sea. I show that this retreat is closely linked to the recent warming of the Antarctic Peninsula, and that it is at least partly anthropogenic.
Sandee Hicks, Communications University of Michigan Atmospheric, Oceanic and Space Sciences Space Research Building, Room 2517 2455 Hayward Street Ann Arbor, MI 48109-2143 Telephone: 734-764-3282 Fax: 734-763-0437
|
xchrom
(1000+ posts)
Send PM |
Profile |
Ignore
|
Tue Feb-03-09 10:20 AM
Response to Original message |
1. isn't there a theory that following a warming |
|
there can be risk of an ice age?
i'm not suggesting that the warming period is over --
|
pocoloco
(1000+ posts)
Send PM |
Profile |
Ignore
|
Tue Feb-03-09 10:28 AM
Response to Reply #1 |
2. Or an ice age caused by warming? |
|
Heat needed to move large amounts of moisture to the polar regions??
|
xchrom
(1000+ posts)
Send PM |
Profile |
Ignore
|
Tue Feb-03-09 10:34 AM
Response to Reply #2 |
3. it's something like that. |
|
i follow this stuff -- but i don't understand all of it.
now i forget where i read this --national geographic or a science article here -- but the argument was compelling.
|
phantom power
(1000+ posts)
Send PM |
Profile |
Ignore
|
Tue Feb-03-09 10:37 AM
Response to Reply #1 |
4. Yes, there have been several ice-age/warming cycles over the last 100 kiloyears or so. |
|
The worrying thing that is different this time around is that there is currently a huge CO2 forcing underway from human activity. It appears to be pushing earths climate into a regime that hasn't been seen for at least 60 million years. Earth's current ecosystems are not adapted to this new regime, and a mass extinction event has begun.
It's going to suck.
|
xchrom
(1000+ posts)
Send PM |
Profile |
Ignore
|
Tue Feb-03-09 10:48 AM
Response to Reply #4 |
5. yeah -- it's gonna suck. |
|
and it may all be too late.
|
happyslug
(1000+ posts)
Send PM |
Profile |
Ignore
|
Wed Feb-04-09 02:01 AM
Response to Reply #1 |
6. That is what is believed to have happen just before the start of the last Ice Age |
DU
AdBot (1000+ posts) |
Thu Apr 25th 2024, 03:59 PM
Response to Original message |