Blar i Geophysical Institute på tittel
Viser treff 566-585 av 1469
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Identifying quasi-periodic variability using multivariate empirical mode decomposition: a case of the tropical Pacific
(Journal article; Peer reviewed, 2023)A variety of statistical tools have been used in climate science to gain a better understanding of the climate system's variability on various temporal and spatial scales. However, these tools are mostly linear, stationary, ... -
IEA Wind Task 49: Reference Site Conditions for Floating Wind Arrays
(Journal article; Peer reviewed, 2024)The commercial-scale deployment of floating offshore wind (FOW) projects is expected to take place in a diverse range of sites that may differ significantly from existing fixed-bottom projects. FOW farms are particularly ... -
Ignition of high-pressure hydrogen releases – Experimental study of impinging and non-impinging releases through a fast-acting valve, with and without a burst disc downstream of the valve
(Master thesis, 2021-09-14)A wide consensus of climate research indicates that anthropogenic greenhouse gas emissions affect the climate and causes the global mean temperature to rise compared to preindustrial levels. International treaties such as ... -
The Impact of a Reduced High-Wind Charnock Parameter on Wave Growth With Application to the North Sea, the Norwegian Sea, and the Arctic Ocean
(Journal article; Peer reviewed, 2022)As atmospheric models move to higher resolution and resolve smaller scales, the maximum modeled wind speed also tends to increase. Wave models tuned to coarser wind fields tend to overestimate the wave growth under strong ... -
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 ... -
The Impact of Cold-Air Outbreaks and Oceanic Lateral Fluxes on Dense-Water Formation in the Greenland Sea from a 10-Year Moored Record (1999–2009)
(Journal article; Peer reviewed, 2023)The Greenland Sea produces a significant portion of the dense water from the Nordic seas that supplies the lower limb of the Atlantic meridional overturning circulation. Here, we use a continuous 10-yr hydrographic record ... -
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 initialization methods on the predictive skill in NorCPM: an Arctic–Atlantic case study
(Journal article; Peer reviewed, 2022)The skilful prediction of climatic conditions on a forecast horizon of months to decades into the future remains a main scientific challenge of large societal benefit. Here we assess the hindcast skill of the Norwegian ... -
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 sea ice transport on Beaufort Gyre liquid freshwater content
(Journal article; Peer reviewed, 2023)The Arctic Ocean’s Beaufort Gyre (BG) is a wind-driven reservoir of relatively fresh seawater, situated beneath time-mean anticyclonic atmospheric circulation, and is covered by mobile pack ice for most of the year. Liquid ... -
Impact of sea spray-mediated heat fluxes on polar low development
(Journal article; Peer reviewed, 2024)Sea spray, originating from wave breaking under high wind conditions, can significantly affect turbulent heat fluxes at the air–sea interface. Even though polar lows (PLs) can become extreme weather features with gale-force ... -
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 swell waves on atmospheric surface turbulence: wave–turbulence decomposition methods
(Journal article; Peer reviewed, 2024)To study turbulence properties, specifically vertical momentum fluxes under swell wave conditions, I investigate the impact of waves on the power spectrum and spectral coherence of turbulent wind across various spatial and ... -
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 ...