Ingo Arndt / Research icebreaker ship, Polarstern, breaking through ice, Weddell Sea, Antarctica. Editorial use only.

Kathryn Jeffs / 'Golden Fleece' (base ship of the BBC film crew) as it passes through floe ice off the Antarctic Peninsula, Antarctica, January 2009, Taken on location for BBC Frozen Planet series

Sue Flood / Aerial view of sea ice floe breaking up in summer, Admiralty Inlet, Canadian High Arctic, June 2000

Konrad Wothe / Tourists on Russian icebreaker breaking through pack ice, Antarctica

Pete Oxford / Waves breaking over bow in rough seas Southern Indian Ocean (Russian ice breaker ship)

Jordi Chias / Ice breaking up in Paradise Bay, Antarctic Peninsula, Antarctica.

Stefan Christmann / Sea ice breaking up with open ocean beyond, below ice shelf. Atka Bay, Antarctica. February 2017.

Sven Zacek / Ice breaking up in spring melt on Lake Peipsi / Peipus, aerial view. Tartumaa, Eastern Estonia. April 2018.

Nick Upton / Winter ice breaking up, Lake Peipsi, Estonia, April 2018.

Pal Hermansen / Ice breaking up with many ice floes, aerial view. Hornsund, Southern Spitsbergen National Park, Svalbard, Norway. May 2018.

Ingo Arndt / Ice calving from terminal moraine, Perito Moreno Glacier, Los Glaciares National Park, Patagonia, Argentina

Ashley Cooper / Arched Iceberg collapsing into the sea, calved from the Jacobshavn glacier or Sermeq Kujalleq, Greenland, July 2008.