Blar i Geophysical Institute på tittel
Viser treff 1-20 av 1223
-
100-year waves in the Mozambique Channel
(Master thesis, 2010-06-01)Six-hourly significant wave height (SWH) data covering the period September 1957 to August 2002 is obtained from the ERA-40 reanalysis. This data, generated by ECMWF's own configured global WAM model, stems from the first ... -
The 11 year solar cycle UV irradiance effect and its dependency on the Pacific Decadal Oscillation
(Journal article; Peer reviewed, 2021)The stratospheric, tropospheric and surface impacts from the 11 year ultraviolet solar spectral irradiance (SSI) variability have been extensively studied using climate models and observations. Here, we demonstrate using ... -
2018 International Atmospheric Rivers Conference : Multi‐disciplinary studies and high‐impact applications of atmospheric rivers
(Peer reviewed; Journal article, 2019-07-26)Atmospheric rivers (ARs) play a vital role in shaping the hydroclimate of many regions globally, and can substantially impact water resource management, emergency response planning, and other socioeconomic entities. The ... -
2020/21 record-breaking cold waves in east of China enhanced by the ‘Warm Arctic-Cold Siberia’ pattern
(Journal article; Peer reviewed, 2021)Extreme cold waves frequently occur in east of China that dramatically endanger ecological agriculture, power infrastructure and human life. In this study, we found that the 'Warm Arctic-Cold Siberia' pattern (WACS) ... -
The 2021 Atlantic Niño and Benguela Niño Events: external forcings and air–sea interactions
(Journal article; Peer reviewed, 2023)This paper presents a comprehensive analysis of the extreme Atlantic and Benguela Niño events that occurred during the boreal spring–summer of 2021. We conducted sensitivity experiments with a regional ocean–atmosphere ... -
230Th Normalization: New Insights on an Essential Tool for Quantifying Sedimentary Fluxes in the Modern and Quaternary Ocean
(Journal article; Peer reviewed, 2020-01)230Th normalization is a valuable paleoceanographic tool for reconstructing high‐resolution sediment fluxes during the late Pleistocene (last ~500,000 years). As its application has expanded to ever more diverse marine ... -
3D mechanical and thermal analysis of an Aluminium piston for a high-speed Diesel laboratory engine
(Master thesis, 2018-06-22)A cast aluminium piston of a single cylinder Petter Diesel engine is modelled using the finite element method. The engine is intended to be supercharged, which will increase the thermal loading on the piston, and so the ... -
The 3 km Norwegian reanalysis (NORA3) – a validation of offshore wind resources in the North Sea and the Norwegian Sea
(Journal article; Peer reviewed, 2021)We validate a new high-resolution (3 km) numerical mesoscale weather simulation for offshore wind power purposes for the time period 2004–2016 for the North Sea and the Norwegian Sea. The 3 km Norwegian reanalysis (NORA3) ... -
A 4.5 Year‐Long Record of Svalbard Water Vapor Isotopic Composition Documents Winter Air Mass Origin
(Journal article; Peer reviewed, 2020)From May 2014 to September 2018, a laser spectrometer analyzer provided a 4.5 years continuous record of water vapor isotopic composition at Ny-Ålesund (8 m above sea level, a.s.l.), Svalbard. It corresponds to the longest ... -
A POD-Based Reduced Order Model for Offshore Wind Applications, using LiDAR Measurements and WRF-PALM Simulations
(Master thesis, 2022-06-03)Wind flow fields within a wind farm, including wake dynamics, are a complex system of large degrees of freedom. The wake shape and velocity deficit downstream of a turbine may be calculated using numerical modeling, such ... -
Acidification of the Nordic Seas
(Journal article; Peer reviewed, 2022)Due to low calcium carbonate saturation states, and winter mixing that brings anthropogenic carbon to the deep ocean, the Nordic Seas and their cold-water corals are vulnerable to ocean acidification. Here, we present a ... -
Addressing the observational gap over heterogeneous land surfaces in the lower atmospheric boundary layer by multi-copter temperature and humidity profile measurements
(Master thesis, 2024-06-03)The effects of surface heterogeneity on the atmospheric boundary layer are still poorly understood and thus not appropriately parameterized in numerical weather prediction models. The complexity of types, shapes, and scales ... -
Advances in understanding and parameterization of small-scalephysical processes in the marine Arctic climate system: a review
(Peer reviewed; Journal article, 2014-09-10)The Arctic climate system includes numerous highly interactive small-scale physical processes in the atmosphere, sea ice, and ocean. During and since the International Polar Year 2007–2009, significant advances have been ... -
Advancing the Capabilities of Numerical Weather Prediction - On the Utility of Individual Tendency Output
(Doctoral thesis, 2022-11-18)Parametrisering i numeriske værmodeller representerer finskalaprosesser i atmosfæren på subgridnivå. Disse atmosfæriske prosessene inkluderer turbulens, stråling og dråpeformasjon i skyer. Enhver parametrisering er en ... -
Aerodynamic study of a suspension bridge deck by CFD simulations, wind tunnel tests and full-scale observations
(Journal article; Peer reviewed, 2021)Assessing the aerodynamic characteristics of long-span bridges is fundamental for their design. Depending on the terrain complexity and local wind conditions, episodes of large angles of attack (AoA) of 15° may be observed. ... -
Air-Sea Interaction in Biophysical Modeling: With focus on Northeast Arctic Cod
(Doctoral thesis, 2019-02-15)The focus of this thesis is on upper ocean dynamics and the interactions between the atmosphere and the oceans in relation to early life stages of Northeast Arctic cod. The main spawning sites of Northeast Arctic cod are ... -
Airborne observations of the Eyjafjalla volcano ash cloud over Europe during air space closure in April and May 2010
(Peer reviewed; Journal article, 2011-03-11)Airborne lidar and in-situ measurements of aerosols and trace gases were performed in volcanic ash plumes over Europe between Southern Germany and Iceland with the Falcon aircraft during the eruption period of the Eyjafjalla ... -
Aircraft-based observations and high-resolution simulations of an Icelandic dust storm
(Peer reviewed; Journal article, 2012-11-16)The first aircraft-based observations of an Icelandic dust storm are presented. The measurements were carried out over the ocean near Iceland's south coast in February 2007. This dust event occurred in conjunction with an ... -
Akvakultur og små vindturbinar: Eit moglegheitsstudie av i kva grad små vindturbinar kan dekkje energiforbruket ved norske oppdrettsanlegg
(Master thesis, 2018-06-21)The world’s population is growing rapidly, and it will become necessary, to a greater extent, to use the ocean for harvesting food. Norway is the largest exporter of salmon in the world. Prognosis says that aquaculture in ...