With the Copenhagen global climate change conference as the backdrop, The Two-Way will host a live chat Thursday, Dec. 10, 2009 at 1 pm ET with two U.S. scientists who are presently conducting field work in Antarctica.

We'll discuss global warming from the perspective of Alex Kahl of Rutgers University in New Jersey and Chris Neill of the Marine Biological Laboratory at Woods Hole in Massachusetts.

Kahl studies, among other topics, the processes by which atmospheric carbon dioxide winds up in the sediment on the ocean floor. Neill studies the impact of human activities on ecosystems.

They can both talk about changes they're seeing that they believe are linked to global warming.

They can also discuss what it's like to work in Antarctica. When I talked with them Wednesday, for instance, it was after what should have been a five-minute trip back by small boat back to their Palmer Station quarters took the better part of an hour after "glacier crumbles," pushed by wind and currents, moved in to block their way.

Please join us with your questions or comments. It should be an interesting session.