Blar i Geophysical Institute på tittel
Viser treff 370-389 av 1010
-
Impact of Arctic sea ice variations on winter temperature anomalies in northern hemispheric land areas
(Peer reviewed; Journal article, 2018-07-30)Coordinated numerical ensemble experiments with six different state-of-the-art atmosphere models have been used in order to evaluate the respective impact of the observed Arctic sea ice and sea surface temperature (SST) ... -
The impact of assimilating data from a remotely piloted aircraft on simulations of weak-wind orographic flow
(Journal article; Peer reviewed, 2014)Orographic winds near a 914 m high mountain in Southwest-Iceland are explored using unique observations made aloft with a small remotely piloted aircraft, as well as with traditional observations and high-resolution ... -
Impact of Assimilation of Radiosonde and UAV Observations from the Southern Ocean in the Polar WRF Model
(Journal article; Peer reviewed, 2020)Weather forecasting in the Southern Ocean and Antarctica is a challenge above all due to the rarity of observations to be assimilated in numerical weather prediction (NWP) models. As observations are expensive and logistically ... -
Impact of data assimilation on Eulerian versus Lagrangian estimates of upper ocean transport
(Peer reviewed; Journal article, 2017)Using four-dimensional variational analysis, we produce an estimate of the state of a coastal region in Northern Norway during the late winter and spring in 1984. We use satellite sea surface temperature and in situ ... -
Impact of late spring Siberian snow on summer rainfall in South-Central China
(Journal article; Peer reviewed, 2020)Located in the Yangtze River Valley and surrounded by mountains, South-Central China (SCC) frequently suffered from natural disasters such as torrential precipitation, landslide and debris flow. Here we provide corroborative ... -
The impact of mean state errors on equatorial Atlantic interannual variability in a climate model
(Peer reviewed; Journal article, 2015-02-23)Observations show that the Equatorial Atlantic Zonal Mode (ZM) obeys similar physics to the El Niño Southern Oscillation (ENSO): positive Bjerknes and delayed negative feedbacks. This implies the ZM may be predictable on ... -
Impact of ocean and sea ice initialisation on seasonal prediction skill in the Arctic
(Peer reviewed; Journal article, 2019)There is a growing demand for skillful prediction systems in the Arctic. Using the Norwegian Climate Prediction Model (NorCPM) that combines the fully-coupled Norwegian Earth System Model and the Ensemble Kalman filter, ... -
Impact of Snow Initialization in Subseasonal‐to‐Seasonal Winter Forecasts With the Norwegian Climate Prediction Model
(Peer reviewed; Journal article, 2019)Snow initialization has been previously investigated as a potential source of predictability atthe subseasonal‐to‐seasonal (S2S) timescale in winter and spring, through its local radiative,thermodynamical, and hydrological ... -
Impact of springtime Himalayan-Tibetan Plateau snowpack on the onset of the Indian summer monsoon in coupled seasonal forecasts
(Peer reviewed; Journal article, 2016-02-20)The springtime snowpack over the Himalayan–Tibetan Plateau (HTP) region and Eurasia has long been suggested to be an influential factor on the onset of the Indian summer monsoon. To assess the impact of realistic initialization ... -
The impact of surface currents on the wave climate in narrow fjords
(Journal article; Peer reviewed, 2021)This study investigates the effect of surface currents on wind-generated waves in a complex coastal system with narrow fjords. The simulations are based on a phase-averaged wave model forced with surface currents from a ... -
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, ... -
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 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 ...