Browsing Geophysical Institute by Title
Now showing items 487-506 of 1097
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Key Role of the Ocean Western Boundary currents in shaping the Northern Hemisphere climate
(Peer reviewed; Journal article, 2019)The individual impact of North Atlantic and Pacific Ocean Western Boundary Currents (OWBCs) on the tropospheric circulation has recently been studied in depth. However, their simultaneous role in shaping the hemisphere-scale ... -
The key role of topography in altering North Atlantic atmospheric circulation during the last glacial period
(Peer reviewed; Journal article, 2011-10-18)The Last Glacial Maximum (LGM; 21 000 yr before present) was a period of low atmospheric greenhouse gas concentrations, when vast ice sheets covered large parts of North America and Europe. Paleoclimate reconstructions and ... -
Klimaeffektar av redusert arktisk sommarisdekke: ein modellstudie
(Master thesis, 2006) -
Konsepsjon, simulering og testing av en elektronisk styrt hydraulisk aktuator for styring av en motorventil
(Master thesis, 2018-08-23)Denne masteroppgaven tar for seg elektrohydraulisk styring av en motorventil i en medium speed motor. Det forsøkes å utnytte en eksisterende kamaksling til å drive en pumpe som skal gi trykk til en aktuator, slik at denne ... -
Korrigering av modellestimert nedbør ved hjelp av historisk data.
(Master thesis, 2010-06-01)I denne oppgåva er det sett på moglegheit for betring av modellestimert nedbør ved å korrigere modellerte nedbørsestimat ved hjelp av fleire ulike korreksjonsfaktorar som tar omsyn til ulike vêrtypar og nedbørsintensiteten. ... -
Laboratory Experiments on Internal Solitary Waves in Ice-Covered Waters
(Peer reviewed; Journal article, 2019)Internal solitary waves (ISWs) propagating in a stably stratified two‐layer fluid in which the upper boundary condition changes from open water to ice are studied for grease, level, and nilas ice. The ISW‐induced current ... -
Laboratory study of frazil ice accumulation under wave conditions
(Peer reviewed; Journal article, 2012-02-09)Ice growth in turbulent seawater is often accompanied by the accumulation of frazil ice crystals at its surface, forming a grease ice layer. The thickness and volume fraction of this ice layer play an important role in ... -
Laboratory study of initial sea-ice growth: properties of grease ice and nilas
(Peer reviewed; Journal article, 2012-07-10)We investigate initial sea-ice growth in an ice-tank study by freezing an NaCl solution of about 29 g kg−1 in three different setups: grease ice grew in experiments with waves and in experiments with a current and wind, ... -
Lagrangian matches between observations from aircraft, lidar and radar in a warm conveyor belt crossing orography
(Journal article; Peer reviewed, 2021)Warm conveyor belts (WCBs) are important airstreams in extratropical cyclones, often leading to the formation of intense precipitation and the amplification of upper-level ridges. This study presents a case study that ... -
Lagrangian Measurement of Waves and Near Surface Turbulence from Acoustic Instruments
(Peer reviewed; Journal article, 2015-12-02)We demonstrate high-resolution measurements of upper ocean flow and turbulence using a Lagrangian drifter. A spherical buoy as a quasi-wave following drifter mitigate the contaminations induced by wave orbital velocities ... -
The Lagrangian particle dispersion model FLEXPART version 10.4
(Peer reviewed; Journal article, 2019-12-02)The Lagrangian particle dispersion model FLEXPART in its original version in the mid-1990s was designed for calculating the long-range and mesoscale dispersion of hazardous substances from point sources, such as those ... -
Land Surface Data Assimilation of Satellite Derived Surface Soil Moisture : Towards an Integrated Representation of the Arctic Hydrological Cycle
(Doctoral thesis, 2019-10-21)The ability to accurately determine soil water content (soil moisture) over large areas of the Earth’s surface has potential implications in meteorology, hydrology, water and natural hazards management. The advent of ... -
Langmuir Turbulence in the HYCOM Ocean Model
(Master thesis, 2017)The impact of parameterising the turbulent mixing induced by surface wave-driven Langmuir turbulence is investigated for a basin-scale configuration of the hybrid-coordinate ocean circulation model HYCOM. Two-year, non-data ... -
Large decadal changes in air-sea CO2 fluxes in the Caribbean Sea
(Peer reviewed; Journal article, 2019)Sixteen years of surface water CO2 data from autonomous systems on cruise ships sailing in the Caribbean Sea and Western North Atlantic show marked changes on interannual timescales. The measured changes in fugacity (≈partial ... -
Large-eddy simulation of radiation fog with comprehensive two-moment bulk microphysics: Impact of different aerosol activation and condensation parameterizations
(Peer reviewed; Journal article, 2019-05-29)In this paper we study the influence of the cloud microphysical parameterization, namely the effect of different methods for calculating the supersaturation and aerosol activation, on the structure and life cycle of radiation ... -
Large-Scale Atmospheric Circulation Variability and its Impacts on the Nordic Seas Ocean Climate - a Review. In: The Nordic Seas: An Integrated Perspective
(Geophysical Monograph Series;158, Chapter, 2005)The large-scale atmospheric circulation and its impacts on the Nordic Seas ocean climate are reviewed. The dominant factors for the atmospheric variability are the Icelandic low and the Azores high, determining the strength ... -
Large‐scale regional model biases in the extra‐tropical North Atlantic storm track and impacts on downstream precipitation
(Peer reviewed; Journal article, 2019)Global climate models have circulation biases that the community aims to reduce, for instance through high‐resolution dynamical downscaling. We used the Weather Research and Forecasting model (WRF) to downscale both ... -
A Last Glacial Maximum forcing dataset for ocean modelling
(Journal article; Peer reviewed, 2020)Model simulations of the Last Glacial Maximum (LGM; ∼ 21 000 years before present) can aid the interpretation of proxy records, can help to gain an improved mechanistic understanding of the LGM climate system, and are ... -
Late winter response to atmospheric and tidal forcing in the Førdefjord, inferred from mooring observations
(Master thesis, 2018-06-20)The Førdefjord is a narrow fjord on the western coast of Norway. A shallow sill is situated at the Ålasund, in the centre part of the fjord. A deep basin, 3 km north of the sill, has been approved as a deposit site for ... -
Lateral Heat Transport in the Lofoten Basin: Near-Surface Pathways and Subsurface Exchange
(Peer reviewed; Journal article, 2019)The Lofoten Basin in the Nordic Seas plays a central role in the Atlantic overturning circulation by acting as a reservoir for the warm and saline Atlantic Water flow toward the Arctic Ocean. The mass and heat exchange ...