Climate change: 'We're making wine in Norway'

Slinde Vineyard, situated next to a fjord in Norway.

Norwegian winemaker Bjørn Bergum talks to his grapevines.

"You have to have a connection with them. When I woke up this morning, there was 3cm of snow. I was saying to them: 'Don't be afraid - it will be nice in the afternoon."

Perhaps Bjørn's plants do need a little extra encouragement; they're growing at 61 degrees north of the equator - far outside the 30-50 degrees latitude traditionally considered optimum for wine production.

But climate change is pushing vineyards further north and south towards the poles.

The trends are absolutely clear, according to Dr Greg Jones, a climatologist who specialises in grape production and wines and is himself the owner of a winery, Abacela, in Oregon in the US.

"A lot of our cool climate limits have changed. They've gone further north in the northern hemisphere, and further south in the southern hemisphere."

Slinde Vineyard, which Bjorn runs with his partner Halldis, is at the furthest reaches of these new limits. Positioned by the Sognefjord, Norway's longest and deepest fjord, the vines grow on slopes which catch the sun while facing snow-capped mountains.