David Woodfall / Sunrise over offshore wind turbine farm, Essex, England, UK, December.

Andy Rouse / Polar ice cap at sunset. Austfonna Polar Ice Cap, Svalbard, Norway, August 2011.

Ole Jorgen Liodden / Iceberg in calm arctic seas at 80 degrees north. Svalbard, September.

Kathryn Jeffs / The 'Golden Fleece' (base ship for BBC film crew) passing up the coast of the Antarctic Peninsula, Antarctica, January 2009, Taken on location for BBC Frozen Planet series

Eric Baccega / Melting ice at Floe Edge, Arctic Bay, Baffin Island, Nunavut, Canada, April 2009.

Billy Black / Gull (Larinae) sitting on mooring ball in calm waters on misty day. Robinhood, Maine, USA, July 2010.

Ross Hoddinott / Porthcothan Bay, evening light and sunset at low tide. Near St Eval, Cornwall, England, UK. April 2010.

Sebastian Kennerknecht / Coastline at dusk, Shark Fin Cove, Davenport, California

Andy Rouse / Rays of light shining through storm clouds over Drake Passage, Antarctica, February 2006

Tim Fitzharris / Sunset over Leo Carillo State Beach, Malibu, California

Tim Fitzharris / Enderts Beach at sunset, Redwood National Park, California

Tim Fitzharris / Sea arch and full moon over El Matador State Beach, Malibu, California