A5089337617- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Climate change and permafrost
- Winter Sports Injuries and Performance
- Polar Research and Ecology
- Climate variability and models
Bjerknes Centre for Climate Research
2022-2024
University of Bergen
2022-2024
Abstract The transport of oceanic heat towards the Antarctic continental margin is central to mass balance Ice Sheet. Recent modeling efforts challenge our view on where and how on-shelf flux occurs, suggesting that it largest dense shelf waters cascade down slope. Here we provide observational evidence supporting this claim. Using records from moored instruments, link downslope flow water Filchner overflow upslope warm water.
Abstract. The southern Weddell Sea and the Filchner Ice Shelf cavity are locations of dense bottom water production thus connected to global climate system. However, it has been suggested that increased heat transport from deep ocean onto continental shelf towards ice cavities would disrupt increase melt rates. Processes affect southward are, therefore, important understand. Sudden strong westward surface stress events – "storms" drive enhanced modified Warm Deep Water across in Trough...
Abstract. Around most of Antarctica, the Circumpolar Deep Water (CDW) shows a warming trend. At same time, thermocline is shoaling, thereby increasing potential for CDW to enter shallow continental shelves and ultimately increase basal melt in ice shelf cavities that line coast. Similar trends, on order 0.05 ∘C 3 m per decade, have been observed Warm (WDW), slightly cooled derivative found at depth Weddell Sea. Here, we report sudden, local temperature maximum WDW above slope north Filchner...
Abstract Sudden peaks in south‐westward wind strength (storms) have been observed to drive pulses of enhanced southward currents on the continental shelf east Filchner Trough. However, link between and flow is not persistent, it uncertain which conditions favor wind‐driven that typically bring modified Warm Deep Water toward front Ice Shelf. We run a set experiments an idealized numerical model setup find storms induce net “warm” (Θ > −1.5°C) volume transport trough region throughout...
Abstract. Ice shelves in the Amundsen Sea are thinning rapidly as ocean currents bring warm water into cavities beneath floating ice. Although reported melt rates for Getz Shelf comparatively low region, its size makes it one of largest freshwater sources around Antarctica, with potential consequences for, bottom formation downstream, example. Here, we use a 2-year-long novel mooring record (2016–2018) and 16-year-long regional model simulations to describe, first time, hydrography...
Abstract. Ice shelves in the Amundsen Sea are thinning rapidly as ocean currents bring warm water into cavities beneath floating ice. While reported melt rates for Getz ice shelf comparatively low region, its size makes it one of largest freshwater sources around Antarctica, with potential consequences e.g. bottom formation downstream. Here, we use two year long mooring records (2016–2018) and 16 regional model simulations to describe, first time, hydrography circulation vicinity front...
<p>As the melt rates of Getz Ice Shelf (GIS) increase, its grounding line is retreating, possibly destabilizing GIS. Detailed oceanographic observations from all GIS frontal regions are needed to describe drivers basal and obtain an accurate projection rates. We present first mooring bathymetrically sheltered trough between Siple Carney Islands - one remaining fronts be described in detail. Although ocean colder this central compared what observed adjacent troughs, temperatures...
Abstract. Around most of Antarctica, the Circumpolar Deep Water (CDW) shows a warming trend. At same time, thermocline is shoaling, thereby increasing potential for CDW to enter shallow continental shelves and ultimately increase basal melt in ice shelf cavities that line coast. Similar trends, on order 0.05 °C 30 m per decade, have been observed Warm (WDW), slightly cooled derivative found at depth Weddell Sea. Here we report sudden, local temperature maximum WDW above slope north Filchner...