Blar i Geophysical Institute på tittel
Viser treff 1233-1252 av 1296
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Variability in deep water mass properties and mixing in the Norwegian Sea
(Master thesis, 2016-12-19)Decadal variations of the Norwegian Sea Deep Water are presented for the 1990s and 2000s. While salinity values have only slightly increased for the Norwegian Basin, there is a noticeable increase in potential temperature ... -
Variability in hydrochemical properties and composition of the dense water in the Faroese Channels
(Master thesis, 2018-06-21)The temporal variability in deep water properties and composition in both Faroe-Shetland and Faroe Bank Channel were examined in June 2002, July 2009, and April 2015. Differences in the water column structure and property ... -
Variability in the Geostrophic Flow of the Agulhas Current, an Investigation of Sea Surface Height Obtained from Altimetry Data
(Master thesis, 2015-06-15)The distinct and robust structure of the greater Agulhas Current regime southeast of southern Africa was depicted in the spatial pattern of the absolute dynamic topography. As a part of Work Package 3: Environmental driver, ... -
Variable Nordic Seas Inflow Linked to Shifts in North Atlantic Circulation
(Journal article; Peer reviewed, 2021)The inflow across the Iceland-Scotland Ridge determines the amount of heat supplied to the Nordic Seas from the subpolar North Atlantic (SPNA). Consequently, variable inflow properties and volume transport at the ridge ... -
Variations of Mixed Layer Depth and Water Properties in the Norwegian Sea for the period 1949-1999
(Peer reviewed; Journal article, 2006-06-08)The mixed layer of the ocean and the processes therein affect the ocean’s biological production, the exchanges with the atmosphere, and the water modification processes important in a climate change per- spective. To provide ... -
Velocity spectra and coherence estimates in the marine atmospheric boundary layer
(Journal article; Peer reviewed, 2018)Two years of continuous sonic anemometer measurements conducted in 2007 and 2008 at the FINO1 platform are used to investigate the characteristics of the single- and two-point velocity spectra in relation to the atmospheric ... -
Vertical Convergence of Turbulent and Double-Diffusive Heat Flux Drives Warming and Erosion of Antarctic Winter Water in Summer
(Journal article; Peer reviewed, 2023)The seasonal warming of Antarctic Winter Water (WW) is a key process that occurs along the path of deep water transformation to intermediate waters. These intermediate waters then enter the upper branch of the circumpolar ... -
Vertical diffusivity and oxygen concentrations in a fjord basin - A case study of the deep basin in Masfjorden
(Master thesis, 2021-06-01)The basin layer in a sill fjord is isolated from the coast, and may become hypoxic or anoxic if the renewal frequency is low. Deep water renewals and vertical mixing are the physical processes which affects the oxygen ... -
Vertical fluxes of nitrate in the seasonal nitracline of the Atlantic sector of the Arctic Ocean
(Peer reviewed; Journal article, 2016-07)This study compiles colocated oceanic observations of high-resolution vertical profiles of nitrate concentration and turbulent microstructure around the Svalbard shelf slope, covering both the permanently ice-free Fram ... -
Vertical mixing in the Arctic Ocean inferred from eXpendable Current Profilers
(Master thesis, 2011-05-31)Recent and historical data sets from different regions of the Arctic Ocean are analysed using velocity profiles from 127 eXpendable Current Profiler (XCP) deployments from the time period 1993 to 2010. The data sets are ... -
Vertical mixing in the marginal ice zone of the Barents Sea Spatial and temporal variation of oceanic turbulence - observations and numerical model experiments
(Doctoral thesis, 2007-01-12)Vertical mixing affects water mass modification, biological productivity, and chemical fluxes in the ocean, but its response to forcing and variability in time and space in seasonally ice-covered seas is inadequately known. ... -
Vertical structure and seasonal variability of the inflow to the Lofoten Basin inferred from high resolution Lagrangian simulations
(Peer reviewed; Journal article, 2019-11-13)The Lofoten Basin in the eastern Nordic Seas plays a central role in modifying the warm Atlantic Water inflow toward the Arctic Ocean. Here, the Atlantic Water experiences increased residence times, cooling, and substantial ... -
Vertical structure of recent arctic warming from observed data and reanalysis products
(Peer reviewed; Journal article, 2012-03)Spatiotemporal patterns of recent (1979–2008) air temperature trends are evaluated using three reanalysis datasets and radiosonde data. Our analysis demonstrates large discrepancies between the reanalysis datasets, possibly ... -
Vêrskipstasjonen MIKE og modellen MICOM - ei samanlikning av observasjonar og modellresultat over 55 år
(Master thesis, 2006)Observasjonar frå MIKE viser ein varm og salt periode som starta i år 2000, og i 2004 vart dei høgste, observerte temperatur og salt verdiane for den atlantiske kjernen registrert her. Oppvarminga nede i djupet pågår stadig, ... -
A view on possible regime shifts in the North Atlantic subpolar gyre in the mid 1920s and 1990s
(Master thesis, 2014-10-22)There is strong observational support for two significant warming episodes of the North Atlantic Subpolar Gyre (SPG), one starting in the mid 1920s the other in the mid 1990s. Possible mechanisms responsible for the two ... -
Volume transport and mixing of the cold water overflow downstream of the Faroe Bank Channel from one year of moored measurements
(Peer reviewed; Journal article, 2016-03-15)One-year long time series of current velocity and temperature from eight moorings deployed in the Faroe Bank Channel (FBC) are analysed to describe the structure and variability of the dense overflow plume on daily to ... -
Vortex interaction in the wake of a two- and three-bladed wind turbine
(Journal article; Peer reviewed, 2020)The vortex interaction in the wake behind a two- and three-bladed model scale wind turbine is investigated. The two rotors have equal solidity, and produce similar power and thrust at the design tip speed ratio. Phase-averaged ... -
Warm air intrusions reaching the MOSAiC expedition in April 2020- The YOPP targeted observing period (TOP)
(Journal article; Peer reviewed, 2023)In the spring period of the Multidisciplinary drifting Observatory for the Study of Arctic Climate (MOSAiC) expedition, an initiative was in place to increase the radiosounding frequency during warm air intrusions in the ... -
Warm Atlantic water explains observed sea ice melt rates north of Svalbard
(Journal article; Peer reviewed, 2020)Warm Atlantic water (AW) that flows northward along the Svalbard west coast is thought to transport enough heat to melt regional Arctic sea ice effectively. Despite this common assumption, quantitative requirements necessary ... -
Warm Circumpolar Deep Water at the Western Getz Ice Shelf Front, Antarctica
(Peer reviewed; Journal article, 2019-01-04)The Getz Ice Shelf is one of the largest sources of fresh water from ice shelf basal melt in Antarctica. We present new observations from three moorings west of Siple Island 2016–2018. All moorings show a persistent flow ...