Most arctic ice at North Pole has vanished, warns polar explorer

photo: explorer Robert SwanMost of the ice around the North Pole has vanished, warns leading polar explorer

Robert Swan on an expedition (2041 Foundation)

Robert Swan, the first person to walk to both the North and South poles, tells i about the dramatic changes he has seen to the polar icescape in the past three decades

Thirty years ago the explorer Robert Swan walked 700 kilometres (435 miles) across Arctic sea ice in a 56-day springtime trek to the North Pole. Today, that ice is mostly water, … [more…]

Warmer, saltier polar water could change global ocean currents

Warmer, saltier polar water could change global ocean currents

When ice shelves melt, they dump freshwater into the sea which lightens the salty water. Credit: Flickr/NASA ICE, licensed under CC BY 2.0

Melting ice shelves are changing the ocean’s chemistry at the South Pole and the result could be a change in global currents and increased glacial melt, according to scientists who are creating maps to feed into climate change models.

At the North and South Poles, cold dense … [more…]