Blar i Geophysical Institute på tittel
Viser treff 198-217 av 1074
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The Determination of the Snow Optical Grain Diameter and Snowmelt Area on the Greenland Ice Sheet Using Spaceborne Optical Observations
(Journal article; Peer reviewed, 2022)The optical diameter of the surface snow grains impacts the amount of energy absorbed by the surface and therefore the onset and magnitude of surface melt. Snow grains respond to surface heating through grain metamorphism ... -
Development and Comparison of Compressor Models for Heat Pump Applications in TRNSYS
(Master thesis, 2018-06-22)Heat pump systems may serve as a replacement for many heating systems using fossil fuels for heating purposes. Heat pumps are widely used in Norway where electric energy is abundant and inexpensive. Research and development ... -
The development and evaluation of an idealized ocean model for the Bergen Dynamic Model
(Master thesis, 2013-11-20)Three idealized ocean model versions are developed for the Bergen Dynamic Model (Bedymo). All three model versions fall into the category of slab ocean models. One version is more or less a standard slab ocean model, while ... -
Development of a new urban climate model based on the model PALM – Project overview, planned work, and first achievements
(Journal article; Peer reviewed, 2019)In this article we outline the model development planned within the joint project Model-based city planning and application in climate change (MOSAIK). The MOSAIK project is funded by the German Federal Ministry of Education ... -
Development of an atmospheric chemistry model coupled to the PALM model system 6.0: implementation and first applications
(Journal article; Peer reviewed, 2021)In this article we describe the implementation of an online-coupled gas-phase chemistry model in the turbulence-resolving PALM model system 6.0 (formerly an abbreviation for Parallelized Large-eddy Simulation Model and now ... -
Development of an automatic thresholding method for wake meandering studies and its application to the data set from scanning wind lidar
(Journal article; Peer reviewed, 2022)Wake meandering studies require knowledge of the instantaneous wake evolution. Scanning lidar data are used to identify the wind flow behind offshore wind turbines but do not immediately reveal the wake edges and centerline. ... -
Development of community, capabilities and understanding through unmanned aircraft-based atmospheric research: The LAPSE-RATE campaign
(Peer reviewed; Journal article, 2020)Because unmanned aircraft systems (UAS) offer new perspectives on the atmosphere, their use in atmospheric science is expanding rapidly. In support of this growth, the International Society for Atmospheric Research Using ... -
Diabatic Heating as a Pathway for Cyclone Clustering Encompassing the Extreme Storm Dagmar
(Journal article, 2020)Contrary to the general notion that extratropical cyclones reduce baroclinicity, the baroclinicity is found to be enhanced in the wake of the extreme winter storm Dagmar. Thus, individual storms can increase baroclinicity, ... -
Diabatic heating governs the seasonality of the Atlantic Niño
(Journal article; Peer reviewed, 2021)The Atlantic Niño is the leading mode of interannual sea-surface temperature (SST) variability in the equatorial Atlantic and assumed to be largely governed by coupled ocean-atmosphere dynamics described by the Bjerknes-feedback ... -
Diagnosing and Understanding the AMOC Biases in NorESM
(Conference object; Peer reviewed, 2014)We investigate the Atlantic Meridional Overturning Circulation (AMOC) in the Norwegian Earth System Model (NorESM) featuring isopycnal ocean component (MICOM). The Coupled Model Intercomparison Phase 5 (CMIP5) NorESM ... -
Diagnosing ocean tracer transport from Sellafield and Dounreay by equivalent diffusion and age
(Peer reviewed; Journal article, 2008-09-27)A simple approach for estimating the equivalent diffusion for diagnosing tracer transport is proposed. Two different expressions are derived; one is based directly on an analytical solution of the two-dimensional ... -
A diagnosis of warm-core and cold-core extratropical cyclone development using the Zwack–Okossi equation
(Peer reviewed; Journal article, 2009)In this study, the development of a warm-core and cold-core extratropical cyclone over North Atlantic is examined. The geostrophic relative vorticity tendency used to diagnose the development is calculated utilizing the ... -
A Diagnostic Diagram to Understand Atmosphere-ocean Dynamics in the Southern North Sea at High Wind Spe
(Peer reviewed; Journal article, 2014)Long time series of offshore meteorological measurements in the lower marine atmospheric boundary layer show dynamical regimes and variability that are forced partly by interaction with the underlying sea surface and partly ... -
A diagram of wind speed versus air-sea temperature difference to understand the marine atmospheric boundary layer
(Peer reviewed; Journal article, 2015-08-28)This contribution reviews the dynamics in the marine atmospheric boundary layer (MABL) with a diagnostic diagram: wind speed versus air-sea temperature difference or U-ΔT. The diagram was first used by Alfred Woodcock in ... -
Differential absorption lidar for water vapor isotopologues in the 1.98 μm spectral region: Sensitivity analysis with respect to regional atmospheric variability
(Journal article; Peer reviewed, 2021)Laser active remote sensing of tropospheric water vapor is a promising technology to complement passive observational means in order to enhance our understanding of processes governing the global hydrological cycle. In ... -
Dimensjonering av asynkronmotor for traktor
(Master thesis, 2022-06-01)Rapporten om asynkronmotor for traktor dekker mesteparten av teoretisk og matematisk arbeid knyttet til oppgavens mål. Metodene knyttet til dimensjonering av maskinen er i samsvar med dagens teknologi og marked. Det har ... -
Direct and Indirect Effects of Surface Fluxes on Moist Baroclinic Development in an Idealized Framework
(Journal article; Peer reviewed, 2020-09)The convoluted role of surface sensible and latent heat fluxes on moist baroclinic development demands a better understanding to disentangle their local and remote effects. Including diabatic effects in the Eady model, the ... -
Direct measurements of the mean flow and eddy kinetic energy structure of the upper ocean circuletion in the NE Atlantic
(Journal article, 2005-07-19)The upper ocean circulation in the sub-polar northeast Atlantic has been a challenge to quantify due to strong and variable wind-forcing, and strong and variable deep currents that lead to large uncertainties in the use ... -
Direct ocean surface velocity measurements from space: Improved quantitative interpretation of Envisat ASAR observations
(Peer reviewed; Journal article, 2008-11-29)Previous analysis of Advanced Synthetic Aperture Radar (ASAR) signals collected by ESA’s Envisat has demonstrated a very valuable source of high-resolution information, namely, the line-of-sight velocity of the moving ocean ... -
Directional wave measurements using an autonomous vessel
(Peer reviewed; Journal article, 2016-08-01)An autonomous vessel, the Offshore Sensing Sailbuoy, was used for wave measurements near the Ekofisk oil platform complex in the North Sea (56.5º N, 3.2º E, operated by ConocoPhillips) from 6 to 20 November 2015. Being 100 ...