Automatic detection of snow avalanche debris in central Svalbard using C-band SAR data

Dieuwertje S. Wesselink,

Eirik Malnes,

Markus Eckerstorfer,

Roderik C. Lindenbergh

Опубликована Июнь 30, 2017

Snow avalanches pose a threat to people and infrastructure in and around Svalbard’s main settlement Longyearbyen. Since January 2016, publically available regional avalanche warnings are issued daily for Nordenskiöld Land, the area around Longyearbyen. Avalanche warning services rely on information of when and where avalanches occur. Systematic field observations of avalanche activity are not feasible across all of the vast area (ca. 7200 km2) of Nordenskiöld Land. Svalbard also experiences over four months of polar night per year. However, using synthetic aperture radar (SAR), a weather- and light-independent technique, large areas can be monitored at once. We have developed a …

Novel terrestrial haul-out behaviour by ringed seals (Pusa hispida) in Svalbard, in association with harbour seals (Phoca vitulina)

Christian Lydersen,

Kit M. Kovacs,

Jade Vaquie-Garcia,

Espen Lydersen,

Guttorm N. Christensen

Опубликована Окт. 6, 2017

Ringed seals (Pusa hispida) are the most ice-associated of all Arctic pinnipeds. In the Svalbard area, this species has always given birth, moulted and rested on sea ice. In addition, much of their food has been comprised of ice-associated prey. Recently, ringed seals have been reported to be using terrestrial substrates as a haul-out platform in some fjords on the west coast of Spitsbergen. In many cases the seals involved are harbour seals (Phoca vitulina), which are extending their distribution into new areas within the Svalbard Archipelago and which are being misclassified as ringed seals. However, this study reports that …

Academia in Svalbard: an increasingly important role for research and education as tools for Norwegian policy

Ole Arve Misund

Опубликована Апрель 25, 2017

Svalbard, a High-Arctic archipelago over which Norway practises sovereignty in accordance with the terms of the Svalbard Treaty, has become an increasingly important area for Arctic research and higher education. There are four more or less permanent settlements with substantial research infrastructure, and a few manned observatories for special purposes. Several Norwegian and foreign research institutions have established stations and installations in the archipelago. With coal mining activity scaling down because of economic difficulties and lack of political support for subsidies, Norwegian policy will prioritize research and higher education as a way of maintaining Norwegian settlements in Svalbard. I give …

Morphology of seamounts at the Mendeleev Rise, Arctic Ocean

Evgeny Gusev,

Pavel Rekant,

Valery Kaminsky,

Alexey Krylov,

Andrey Morozov,

Sergey Shokalsky,

Sergey Kashubin

Опубликована Апрель 10, 2017

Geological and geophysical studies undertaken during the Russian Arktika-2012 Expedition of 2012 produced evidence of basement outcrops on the steep slopes of the Mendeleev Rise seamounts. Observations of the outcrops from research submarines showed that part of the steep slopes interpreted as basement outcrops based on seismic data were overlain by a light sediment cover. The actual areas of the basement outcrops are therefore much less than indicated by the seismic data alone. The outcrops found are of 5–10 to 100–200 m and are often stretched along some hypsometric level or arranged obliquely, crossing a slope at an angle to …