Blar i Geophysical Institute på tittel
Viser treff 1049-1068 av 1287
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Snow-Atmosphere Humidity Exchange at the Ice Sheet Surface Alters Annual Mean Climate Signals in Ice Core Records
(Journal article; Peer reviewed, 2023)Surface processes alter the water stable isotope signal of the surface snow after deposition. However, it remains an open question to which extent surface post-depositional processes should be considered when inferring ... -
Snowfall and Water Stable Isotope Variability in East Antarctica Controlled by Warm Synoptic Events
(Journal article; Peer reviewed, 2020)Understanding climate proxy records that preserve physical characteristics of past climate is a prerequisite to reconstruct long-term climatic conditions. Water stable isotope ratios (δ18O) constitute a widely used proxy ... -
Snowfall in the Himalayas: An uncertain future from a little-known past
(Peer reviewed; Journal article, 2015-06-03)Snow and ice provide large amounts of meltwater to the Indus, Ganges and Brahmaputra rivers. This study combines present-day observations and reanalysis data with climate model projections to estimate the amount of snow ... -
A Solar Absorber Based on Metal Nanoparticles
(Master thesis, 2016-06-01)Metal nanoparticles (MNPs) exhibits unique optical properties often found in the visible spectrum of light. The key point of interest is the so-called Localized Surface Plasmon Resonance (LSPR) effect that arises within ... -
Solar forcing synchronizes decadal North Atlantic climate variability
(Peer reviewed; Journal article, 2015-09-15)Quasi-decadal variability in solar irradiance has been suggested to exert a substantial effect on Earth’s regional climate. In the North Atlantic sector, the 11-year solar signal has been proposed to project onto a pattern ... -
Solar-wind–magnetosphere energy influences the interannual variability of the northern-hemispheric winter climate
(Journal article; Peer reviewed, 2020)Solar irradiance has been universally acknowledged to be dominant by quasi-decadal variability, which has been adopted frequently to investigate its effect on climate decadal variability. As one major terrestrial energy ... -
Solstrøm, kraftnett, energimodeller og World Energy Model - Hvorfor undervurderes utbygging av solstrøm av IEAs WEM-modell?
(Master thesis, 2016-06-01)I denne oppgaven har jeg forsøkt å svare på spørsmålet «Hvorfor undervurderes utbygging av solstrøm i IEAs WEM-modell?». Dette har jeg gjort ved å se på hvilken teori og ny forskning som finnes for solkraft, kraftsystem, ... -
Some aspects of the work of V.W. Ekman
(Journal article, 2006-01)The climatic conditions in theArctic, and observations of the wind-induced drift of ice made in connexion with Fridtjof Nansen’s Fram expedition, led to the discovery 100 years ago by Vilhelm Bjerknes’ pupil, V.W. Ekman, ... -
Sources and upstream pathways of the densest overflow water in the Nordic Seas
(Journal article; Peer reviewed, 2020)Overflow water from the Nordic Seas comprises the deepest limb of the Atlantic Meridional Overturning Circulation, yet questions remain as to where it is ventilated and how it reaches the Greenland-Scotland Ridge. Here we ... -
Southern Ocean Control of 2°C Global Warming in Climate Models
(Journal article; Peer reviewed, 2023)Global warming will soon reach the Paris Agreement targets of 1.5°C/2°C temperature increase above pre-industrial levels. Under a business-as-usual scenario, the time to reach these targets varies widely among climate ... -
Southern Ocean controls of the vertical marine δ13C gradient – a modelling study
(Peer reviewed; Journal article, 2018-12-04)δ 13 C, the standardised 13C/12C ratio expressed in per mille, is a widely used ocean tracer to study changes in ocean circulation, water mass ventilation, atmospheric pCO2, and the biological carbon pump on timescales ... -
Sparse observations induce large biases in estimates of the global ocean CO2 sink: An ocean model subsampling experiment
(Journal article; Peer reviewed, 2023)Estimates of ocean CO2 uptake from global ocean biogeochemistry models and pCO2-based data products differ substantially, especially in high latitudes and in the trend of the CO2 uptake since 2000. Here, we assess the ... -
Spatial Patterns, Mechanisms, and Predictability of Barents Sea Ice Change
(Journal article; Peer reviewed, 2022)Recent Arctic winter sea ice loss has been most pronounced in the Barents Sea. Here we explore the spatial structure of Barents Sea ice change as observed over the last 40 years. The dominant mode of winter sea ice ... -
Spatial variability of nocturnal stability regimes in an operational weather prediction model
(Journal article; Peer reviewed, 2022)Forecast errors in near-surface temperatures are a persistent issue for numerical weather prediction models. A prominent example is warm biases during cloud-free, snow-covered nights. Many studies attribute these biases ... -
Spenningsetting av transformator: Innkoblingsstrøm og koblingsspenninger ved ulike parametere
(Master thesis, 2022-06-01)Tilfeldig innkobling eller spenningssetting av transformatorer uten last, kan føre til redusert levetid på utstyr og leveringskvalitet i kraftnettet. I tillegg til det økonomiske perspektivet og driftssikkerheten, er dette ... -
Springtime nitrogen oxides and tropospheric ozone in Svalbard: results from the measurement station network
(Journal article; Peer reviewed, 2022)Svalbard is a remote and scarcely populated Arctic archipelago and is considered to be mostly influenced by long-range-transported air pollution. However, there are also local emission sources such as coal and diesel power ... -
The stable atmospheric boundary layer over snow-covered sea ice: Model evaluation with fine-scale ISOBAR18 observations
(Journal article; Peer reviewed, 2022)A realistic representation of the stable atmospheric boundary layer in numerical weather prediction (NWP) and climate models is still a challenge. We study the evolution of a stable boundary layer over snow-covered sea ice ... -
Stable Isotope Composition of Surface Vapour and Precipitation at the Southwest Coast of Norway
(Doctoral thesis, 2021-04-16)A better understanding of the water cycle has become even more crucial under the present condition of climate change. The stable isotopes of hydrogen and oxygen have been used for decades as powerful tracers to provide ... -
A standard protocol for describing the evaluation of ecological models
(Journal article; Peer reviewed, 2022)Numerical models of ecological systems are increasingly used to address complex environmental and resource management questions. One challenge for scientists, managers, and stakeholders is to appraise how well suited these ...