"There is quite a lot of suppression and non-discussion of issues that are difficult, and one of those is in fact methane, " he said, recalling a reluctance on the part of at least one senior scientists involved in the Arctic Climate Impact Assessment to discuss the impact that a methane release might have.

BBC: Climate 'tech fixes' urged for Arctic methane

The parents of a schoolboy injured in an attack by a polar bear in the Arctic which left one other pupil dead, are at his hospital bedside.

BBC: Scott Bennell-Smith

One reason is oil development in other parts of the Arctic.

NPR: ANWR Community Split on Oil Exploration

For a very large part of the energy requirement of such centres (other than one Facebook one which was deliberately placed in near Arctic conditions) is that necessary cooling, rather than the electricity demands of the computing itself.

FORBES: How Do You Cool a Computer Server: Fry It In Oil!

One of two Shell ships that drilled last year in the Arctic Ocean, it has a 160-foot derrick rising from its center and no propulsion system of its own.

NPR: Grounded Shell Oil-Drilling Ship Refloated

The term describes the moment at which the planet shifts from one environmental state to another: in this case, from an Arctic with summer sea ice to one without it.

ECONOMIST: Global warming