Blar i Geophysical Institute på tittel
Viser treff 458-477 av 1194
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Impact of the Agulhas Current on Southern Africa Precipitation: A Modeling Study
(Journal article; Peer reviewed, 2021)The Agulhas Current (AC) creates a sharp temperature gradient with the surrounding ocean, leading to a large turbulent flux of moisture from ocean to atmosphere. We use two simulations of the Weather Research and Forecasting ... -
The impact of the wind stress curl in the North Atlantic on the Atlantic inflow to the Norwegian Sea toward the Arctic
(Peer reviewed; Journal article, 2003-09-04)The Norwegian Atlantic Current (NwAC) through the Norwegian Sea serves as a conduit of warm and saline Atlantic water from the North Atlantic to the Arctic Ocean, an important factor for climate and ecology. In this study, ... -
The impact of turbulence modelling on large offshore wind turbine response
(Doctoral thesis, 2022-10-28)In order to reduce climate change, a large up-scaling of renewable energy capacity is necessary in the near future. Offshore wind is expected to play a key role in this green shift. The wind conditions offshore are in ... -
Impacts of Atlantic multi-decadal variability on the Indo-Pacific and Northern Hemisphere climate
(Doctoral thesis, 2016-06-03)Earlier studies have shown that Atlantic multi-decadal variability (AMY) can impact climate variability globally. However the instrumental records are short compared to the timescale of AMY, and mechanisms for these impacts ... -
Impacts of climate change on Blue Nile flows using bias-corrected GCM scenarios
(Peer reviewed; Journal article, 2009)This study analyses the output of 17 general circulation models (GCMs) included in the 4th IPCC assessment report. Downscaled precipitation and potential (reference crop) evapotranspiration (PET) scenarios for the 2081– ... -
Impacts of Greenland Block Location on Clouds and Surface Energy Fluxes over the Greenland Ice Sheet
(Journal article; Peer reviewed, 2020)Clouds and blocking activity have been implicated as causes of increased Greenland Ice Sheet (GrIS) melt in the 21st century. Although Greenland blocks (i.e., long-lasting, mostly stationary anticyclones) generally reduce ... -
Impacts of the autumn Arctic sea ice on the intraseasonal reversal of the winter Siberian high
(Peer reviewed; Journal article, 2019-02)During 1979–2015, the intensity of the Siberian high (SH) in November and December–January (DJ) is frequently shown to have an out-of-phase relationship, which is accompanied by opposite surface air temperature and circulation ... -
Impacts of the extratropical North Pacific on boreal summer Arctic circulation
(Journal article; Peer reviewed, 2023)A distinct characteristic of the Arctic summer atmospheric circulation is the anomalous anticyclonic circulation centered over the Arctic Ocean associated with significant Arctic warming. Previous studies have related the ... -
Impacts of UV Irradiance and Medium-Energy Electron Precipitation on the North Atlantic Oscillation during the 11-Year Solar Cycle
(Journal article; Peer reviewed, 2021)Observational studies suggest that part of the North Atlantic Oscillation (NAO) variability may be attributed to the spectral ultra-violet (UV) irradiance variations associated to the 11-year solar cycle. The observed ... -
Implementation of slope irradiance in Mesoscale Model version 5 and its effect on temperature and wind fields during the breakup of a temperature inversion
(Peer reviewed; Journal article, 2003-01-24)The atmospheric mesoscale model MM5 has been used at high horizontal resolution to simulate the breakup of a temperature inversion in complex topography. To improve the surface parameterizations during daytime, slope and ... -
Implementation of the sectional aerosol module SALSA2.0 into the PALM model system 6.0: model development and first evaluation
(Peer reviewed; Journal article, 2019-04-11)Urban pedestrian-level air quality is a result of an interplay between turbulent dispersion conditions, background concentrations, and heterogeneous local emissions of air pollutants and their transformation processes. ... -
Implementering av indikeringssystem på dieselmotor og tester av dieseloljer
(Master thesis, 2016-05-31)This report shows the implementation of indication systems and the setup of the lab for a single cylinder diesel engine located at Bergen Univercity College. Further on a study of alternative fuels was carried out, basing ... -
Importance of radiative transfer processes in urban climate models: A study based on the PALM 6.0 model system
(Journal article; Peer reviewed, 2022)Including radiative transfer processes within the urban canopy layer into microscale urban climate models (UCMs) is essential to obtain realistic model results. These processes include the interaction of buildings and ... -
The importance of wind forcing in fjord wave modelling
(Peer reviewed; Journal article, 2019-12-03)Accurate predictions of surface ocean waves in coastal areas are important for a number of marine activities. In complex coastlines with islands and fjords, the quality of wind forcing significantly affects the results. ... -
An Improved Estimate of the Coupled Arctic Energy Budget
(Peer reviewed; Journal article, 2019)This study combines state-of-the-art reanalyses such as the fifth-generation European Re-Analysis (ERA5) and the Ocean Reanalysis System 5 (ORAS5) with novel observational products to present an updated estimate of the ... -
Improved long-span bridge modeling using data-driven identification of vehicle-induced vibrations
(Journal article; Peer reviewed, 2020)The paper introduces a procedure to automatically identify key vehicle characteristics from vibrations data collected on a suspension bridge. The primary goal is to apply a model of the dynamic displacement response of a ... -
An Improved Surface Boundary Condition for Large-Eddy Simulations Based on Monin–Obukhov Similarity Theory: Evaluation and Consequences for Grid Convergence in Neutral and Stable Conditions
(Peer reviewed; Journal article, 2020)Monin–Obukhov similarity theory is used in large-eddy simulation (LES) models as a surface boundary condition to predict the surface shear stress and scalar fluxes based on the gradients between the surface and the first ... -
Improvement of aquaculture management practice by integration of hydrodynamic modelling
(Journal article; Peer reviewed, 2021)Aquaculture has grown to become an important export industry in Norway. The Norwegian Food Safety Authorithy (NFSA) is responsible for the management of the production zones designated to aquaculture. Fish diseases and ... -
Improving Radar-Based Precipitation Nowcasts with Machine Learning Using an Approach Based on Random Forest
(Journal article; Peer reviewed, 2020)A binary classification model is trained by random forest using data from 41 stations in Norway to predict the precipitation in a given hour. The predictors consist of results from radar nowcasts and numerical weather ... -
Improving weather and climate predictions by training of supermodels
(Peer reviewed; Journal article, 2019-11-28)Recent studies demonstrate that weather and climate predictions potentially improve by dynamically combining different models into a so-called “supermodel”. Here, we focus on the weighted supermodel – the supermodel's time ...