A5091154591- Oceanographic and Atmospheric Processes
- Marine and fisheries research
- Marine and coastal ecosystems
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Climate variability and models
- Isotope Analysis in Ecology
- Marine Biology and Ecology Research
- Geological formations and processes
- Methane Hydrates and Related Phenomena
- Marine Bivalve and Aquaculture Studies
- Marine and environmental studies
- Marine animal studies overview
- Atmospheric and Environmental Gas Dynamics
- Geophysics and Gravity Measurements
- Coastal and Marine Management
- Marine Invertebrate Physiology and Ecology
- Fish Ecology and Management Studies
- Offshore Engineering and Technologies
- Ocean Acidification Effects and Responses
- Cephalopods and Marine Biology
- Marine and coastal plant biology
- Maritime Navigation and Safety
- 3D Modeling in Geospatial Applications
- Soil and Water Nutrient Dynamics
Norwegian Institute of Marine Research
2012-2024
Bjerknes Centre for Climate Research
2008-2024
Abstract Climate variability in the Norwegian Sea, comprising and Lofoten Basins, was investigated based upon monthly estimates of ocean heat freshwater contents using data from Argo floats during 2002–18. Both local air–sea exchange advective processes were examined quantified for to interannual time scales. In recent years, 2011–18, Sea experienced a decoupling temperature salinity, with simultaneous warming freshening trend. This mainly explained by two different processes; reduced loss...
In this study, we use 22 acoustically tracked RAFOS floats to examine the routes and spreading of warm North Atlantic waters entering Norwegian Sea between Iceland Faroes. The majority crossed Iceland‐Faroe Ridge at eastern end where it is deepest. They joined Front, but rather than continue north with outer branch Current into Nordic seas, most them jumped over inner branch, which continues inflow through Faroe‐Shetland Channel northeast Vøring Plateau toward Lofoten Basin. Indeed, 17...
The trajectories of 61 profiling Argo floats deployed at mid-depth in the Nordic Seas—the Greenland, Lofoten and Norwegian Basins Iceland Plateau—between 2001 2009 are analysed to determine pattern, strength variability regional circulation. circulation is strongly coupled with structure bottom topography four major basins Seas as a whole. It cyclonic, both on large-scale basin scale, weak flow (<1 cm s −1 ) interior somewhat stronger (up 5 their rims. Only few moved from one another,...
A small anticyclonic eddy of extraordinary intensity sits in the center Lofoten Basin near 69°40′N, 3°E. This paper gives a first detailed description its kinematics and lowest‐order dynamic balances. Using 75 kHz vessel‐mounted acoustic Doppler current profiler, hydrography, six RAFOS floats to probe eddy, we document solid body core with 7–8 km radius relative vorticity very close –f, where f is local Coriolis parameter. Maximum orbital velocities 0.8 ms −1 were observed at 18 radius. One...
Abstract The Lofoten Basin is the largest oceanic reservoir of heat in Nordic Seas, and site important fluxes to atmosphere. An intense permanent anticyclone basin impacts regional hydrography, energetics, ecosystem. Repeated sampling this Eddy from dedicated cruises, autonomous profiling gliders, acoustically-tracked subsurface floats enables documentation its dynamics energetics over course 15 months. eddy core, nearly solid-body rotation, exhibits an unusually low vertical vorticity close...
Abstract The flow of warm salty water toward the Nordic Seas is fundamental importance to climate central and northern Europe. In an effort gain improved quantitative assessment these fluxes a program was started in 2008 measure upper‐ocean currents from high‐seas ferry Norröna, which operates out Faroes Iceland Denmark. current measurements were made with acoustic Doppler profiler mounted Norröna's hull. Starting fall 2013 monthly deployments Expendable BathyThermographs give comprehensive...
Abstract The warm and salty Atlantic Water is substantially modified along its poleward transit across the Nordic Seas, where it reaches deeper isopycnals. In particular, Lofoten Basin, exposed to intense air‐sea interactions, plays a crucial role in transformation of Water. Averaged over seasonal cycle, releases approximately 80 W/m 2 heat atmosphere large area, leading winter mixed layer depths up 500 m (locally exceeding 1,000 Basin Eddy, permanent vortex located basin center) substantial...
Abstract High abundance of Northeast Atlantic mackerel (Scomber scombrus L.), combined with limited food resources, may now force to enter new and productive regions in the northern Norwegian Sea. However, it is not known how exploit spatially varying feeding their vertical distribution swimming behaviour are also largely unknown. During an ecosystem survey Sea during summer season, direction, speed schools were recorded high-frequency omnidirectional sonar four different relative currents,...
Abstract In recent years, several studies have identified an area of intense anticyclonic activity about 500 km straight west the Lofoten Islands at 70°N in northern Norwegian Sea. Now recognized as coherent Basin Eddy (LBE), it is maintained by a supply eddies that break away from Atlantic Current. Here we show ship‐based surveys its velocity field quite stable with central core solid body rotation ∼1000 m deep, ∼8 radius, and relative vorticity close to theoretical limit – f . The also LBE...
The ocean climate of the southern Norwegian Sea - Basin is largely set by relative amount Atlantic Water in eastern and Arctic western region. Here we utilized hydrographic data from repeated sections, together with annually gridded survey upper 1000 m, to resolve main changes over period 1995-2019. Based on integrated heat -and freshwater content, divide into three periods. first 1995-2005, denoted Arctic, characterized fresh cold overlaying Intermediate that basically covers whole Basin....
Neutrally buoyant floats, deployed across the northern slope of Iceland‐Faroe Ridge at 800m depth, reveal tight topographic control their movement: a cluster 22 floats drifts southeast to Faroe‐Shetland Channel where it bifurcates such that over upper turn south and eventually exit Norwegian Sea through Faroe Bank Channel, deeper north in Sea. A subset latter group moves quickly along western Vøring Plateau divides with most turning east into Lofoten Basin remainder circulating cyclonically...
Abstract The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere–ocean research program investigating climate processes in the source region of densest waters Atlantic meridional overturning circulation. During February and March 2018, field campaign was executed over southern that utilized range observing platforms to investigate critical region, including vessel, aircraft, moorings, sea gliders, floats, meteorological buoy. A remarkable feature highly deployment platforms,...
Rapid Arctic warming drives profound change in the marine environment that have significant socio-economic impacts within and beyond, including climate weather hazards, food security, transportation, infrastructure planning resource extraction. These concerns drive efforts to understand predict environmental motivate development of an Region Component Global Ocean Observing System (ARCGOOS) capable collecting broad, sustained observations needed support these endeavors. This paper provides a...
North Sea tidal currents are determined by applying harmonic analysis to ship-borne acoustic Doppler current profiler data recorded from 1999 2016, covering large areas of the northern Sea. Direct measurement sets this magnitude rare in otherwise well investigated Sea, and thus it is a valuable asset studying expanding our understanding its circulation general. The applied least squares fit observations at set knot points. Results compare favorably parameters estimated moored instruments....
A three-dimensional, coupled, physical–chemical–biological model (NORWECOM) is validated by means of observed nutrient fields in the North Sea. The observations used this study are aggregated data for period 1980–1989 obtained from ICES. have been grouped winter, early summer and late sets mean values with standard deviations given 0.5° latitude×1.0° longitude boxes covering NORWECOM to produce an set that compared values. Results both model's ability reproduce concentrations spatial...
Abstract The meridional overturning circulation (MOC) in the North Atlantic plays a major role transport of heat from low to high latitudes. In this study, we combine recent measurements currents surface >700 m shipboard acoustic Doppler current profiler with Argo profiles (to 2000 m) estimate poleward volume, heat, and freshwater flux at 59.5°N between Greenland Scotland. This is made possible thanks vessel Nuka Arctica that operates on 3 week schedule Denmark. For period late 2012 early...