Jordi Chias / Weddell seal (Leptonychotes weddellii) hauled out on ice, Antarctic Peninsula, Antarctica.

Jordi Chias / Weddell seal (Leptonychotes weddellii), Antarctic Peninsula, Antarctica.

Jordi Chias / Weddell seal (Leptonychotes weddellii), Antarctic Peninsula, Antarctica.

Jordi Chias / Weddell seal (Leptonychotes weddellii), Antarctic Peninsula, Antarctica.

Stefan Christmann / Weddell seal (Leptonychotes weddellii) female hauled out with pup, Atka Bay, Queen Maud Land, Antarctica. October.

Sue Flood / Emperor penguin (Aptenodytes forsteri) chick flapping wings, Snow Hill Island rookery, Weddell Sea, Antarctica. November.

Sue Flood / Emperor penguin (Aptenodytes forsteri) feeding chick, Weddell Sea, Antarctica.

Ingo Arndt / Shadow from icebreaker research ship, Polarstern, on ice floe. Weddell Sea, Antarctica

Ingo Arndt / "CTD" (instrument for collecting water samples from all water depths) at work 50 km from the ice floe base. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute; Bremerhav...

Ingo Arndt / Researcher Gerhard Dieckmann checking samples from sediment trap. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was...

Ingo Arndt / Crack in ice floe in front of icebreaker ship Polarstern. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was driftin...

Ingo Arndt / Graphic from "ice thickness profile" of the (ISPOL) ice floe. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was dri...