The Glaciers of Svalbard
Svalbard is a high-Arctic archipelago of nearly sixty thousand square kilometres, roughly sixty percent of which is glaciated. From Longyearbyen the contrast is immediate — black mountains, white ice, sea ice in winter, fjord blue in summer. The archipelago is also the most accessible place in the world to see surging Arctic glaciers, and the easiest tidewater coastline outside of Antarctica.
What makes Svalbard special
Cold climate, marine fronts, surge-type behaviour, and an exceptionally well-developed monitoring network. Norwegian and international science has been measuring these glaciers since the early 20th century, so we know how they have changed in unusual detail.
Austfonna
The single largest ice cap in Europe outside the polar ice sheets, covering most of Nordaustlandet. Its eastern Bracebridge front has been advancing rapidly in surges; the fronts elsewhere are mostly in retreat.
Kronebreen and Kongsvegen
A tidewater pair feeding Kongsfjorden, one of the most studied Svalbard systems thanks to the Ny-Alesund research base. Kronebreen calves dramatically; Kongsvegen is slower and surge-prone.
Nathorstbreen
A massive surge-type glacier in southern Spitsbergen. Has had documented surge advances of several kilometres in recent decades.
Monacobreen
In Liefdefjorden, a wide tidewater glacier with a long calving front. Standard photo stop on expedition cruises from Longyearbyen.
Negribreen
On the east coast of Spitsbergen, in a continuous surge advance through the late 2010s. A perfect modern case study of surge mechanics — water reaches the bed, the glacier accelerates by a factor of 10 or more.
Brasvellbreen
The biggest single calving front of Austfonna, around 35 km wide when active. The "river-from-the-cliff" photographs of meltwater torrents pouring off the front are from Brasvellbreen.
How to visit
Expedition cruises from Longyearbyen are the standard. Shorter day trips by zodiac from town reach the inner fjords. Late spring (May) gives ski tours; July-August gives long days and tidewater cruising; winter gives snowmobile access to inland systems for experienced parties.
Surge dynamics
Many Svalbard glaciers are surge-type: they spend decades nearly stagnant, then accelerate to 10-100 times their normal speed for a few years, then quiesce again. The cause is meltwater reaching the bed and lifting the glacier. Svalbard hosts one of the highest concentrations of surge-type glaciers anywhere.
Climate change in the high Arctic
Svalbard has warmed faster than nearly any place on Earth — over 4 C since the early 20th century. Land glaciers are retreating; surge systems still complicate the picture. The next decades will reveal whether tidewater systems can survive warmer fjord water.
Keep exploring
Filter to "surge-type" on the interactive map to see Svalbard's many surge glaciers colour-coded by status (active, quiescent, retreating) — based on Norwegian Polar Institute monitoring.