Browsing Geophysical Institute by Title
Now showing items 145-164 of 1423
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Calibration and assessment of electrochemical low-cost sensors in remote alpine harsh environments
(Journal article; Peer reviewed, 2021)This work presents results from an original open-source low-cost sensor (LCS) system developed to measure tropospheric O3 in a remote high altitude alpine site. Our study was conducted at the Col Margherita Observatory ... -
CALOTRITON: a convective boundary layer height estimation algorithm from ultra-high-frequency (UHF) wind profiler data
(Journal article; Peer reviewed, 2024)Long time series of observations of atmospheric dynamics and composition are collected at the French Pyrenean Platform for Observation of the Atmosphere (P2OA). Planetary boundary layer depth is a key variable of the climate ... -
Calving rates at tidewater glaciers vary strongly with ocean temperature
(Peer reviewed; Journal article, 2015-10-09)Rates of ice mass loss at the calving margins of tidewater glaciers (frontal ablation rates) are a key uncertainty in sea level rise projections. Measurements are difficult because mass lost is replaced by ice flow at ... -
Can a dual pulsed lidar system measure the lateral coherence of turbulence?
(Master thesis, 2023-08-10)Characterizing the coherence of turbulence in the marine boundary layer faces a significant challenge due to the limited availability of offshore measurements within the relevant altitude ranges, particularly up to 250 m. ... -
Can Areawide Building Retrofitting Affect the Urban Microclimate? An LES Study for Berlin, Germany
(Journal article; Peer reviewed, 2022)In this work, we investigate the effect of areawide building retrofitting on summertime, street-level outdoor temperatures in an urban district in Berlin, Germany. We perform two building-resolving, weeklong large-eddy ... -
Cancellation of the precessional cycle in δ18O records during the Early Pleistocene
(Journal article; Peer reviewed, 2021)The dominant pacing of glacial‐interglacial cycles in deep‐ocean δ18O records changed substantially during the Mid‐Pleistocene Transition. The precessional cycle (∼23 ky) is absent during the Early Pleistocene, which we ... -
Carbon and oxygen fluxes in the Barents and Norwegian Seas : production, air-sea exchange and budget calculations
(Doctoral thesis, 2007-08-17)This thesis focus on the carbon and oxygen fluxes in the Barents and Norwegian Seas and presents four studies where the main topics are variability of biological production, air-sea exchange and budget calculations. The ... -
Carbon to nutrient ratios in marine systems: understanding natural variability Studies of seasonal, inter-annual and regional variability
(Doctoral thesis, 2012-06-29)Ecological stoichiometry deals with the coupling of the carbon (C), nitrogen (N) and phosphorus (P) cycles at the base of the aquatic food webs. Variation in C:N:P stoichiometry is driven by a multitude of factors, and the ... -
Causes of the large warm bias in the Angola–Benguela Frontal Zone in the Norwegian Earth System Model
(Journal article; Peer reviewed, 2018)We have investigated the causes of the sea surface temperature (SST) bias in the Angola–Benguela Frontal Zone (ABFZ) of the southeastern Atlantic Ocean simulated by the Norwegian Earth System Model (NorESM). Similar to ... -
Certain aspects of high latitude climate variability
(Doctoral thesis, 2014-06-13) -
CFD Analysis of a Microturbine Combustor using an LES Turbulence Model
(Master thesis, 2020-07-04) -
Challenges in seismic hazard assessment: Analyses of ground motion modelling and seismotectonic sources
(Doctoral thesis, 2006-06-21)Seismic hazard assessment has an important societal impact in describing levels of ground motions to be expected in a given region in the future. Challenges in seismic hazard assessment are closely associated with the fact ... -
Changes in atmospheric variability in a glacial climate and the impacts on proxy data: a model intercomparison
(Peer reviewed; Journal article, 2009-09-11)Using four different climate models, we investigate sea level pressure variability in the extratropical North Atlantic in the preindustrial climate (1750 AD) and at the Last Glacial Maximum (LGM, 21 kyrs before present) ... -
Changes in the properties and distribution of the intermediate and deep waters in the Fram Strait
(Peer reviewed; Journal article, 2012-04)The Fram Strait is the only deep connection between the Arctic Ocean and the Nordic Seas (Greenland, Iceland, and Norwegian Seas), with a sill depth of approximately 2600 m. Consequently, observations from this area reflect ... -
Characterisation of Single Wind Turbine Wakes with Static and Scanning WINTWEX-W LiDAR Data
(Peer reviewed; Journal article, 2015)With further development of LiDAR technology wake measurements by use of LiDAR became of common interest in the wind energy community. To study new measurement strategies of scanning and nacelle LiDARs, in combination with ... -
Characterising the local and intense water cycle during a cold air outbreak in the Nordic Seas
(Journal article; Peer reviewed, 2018)Air masses in marine cold air outbreaks (CAOs) at high latitudes undergo a remarkable diabatic transformation because of the uptake of heat and moisture from the ocean surface, and the formation of precipitation. In this ... -
Characteristics and Transformation of Pacific Winter Water on the Chukchi Sea Shelf in Late Spring
(Peer reviewed; Journal article, 2019)Data from a late spring survey of the northeast Chukchi Sea are used to investigate various aspects of newly ventilated winter water (NVWW). More than 96% of the water sampled on the shelf was NVWW, the saltiest (densest) ... -
Characteristics of Cold-Air Outbreak Events and Associated Polar Mesoscale Cyclogenesis over the North Atlantic Region
(Journal article; Peer reviewed, 2021)Equatorward excursions of cold polar air masses into ice-free regions, so-called Cold Air Outbreaks (CAO), are frequently accompanied by the development of severe mesoscale weather features. Focusing on two key regions, ... -
Characteristics of cyclones following different pathways in the Gulf Stream region
(Journal article; Peer reviewed, 2021)The Northwest Atlantic is a region of strong temperature gradients and hence is a favourable location for wintertime cyclone intensification co-located with the storm track. The temperature gradient is associated with both ... -
Characterization of a Geothermal Field using Multiscale Travel Time Tomography - A study of the Miravalles Geothermal Field in Costa Rica
(Master thesis, 2019-06-15)The objective of this thesis is to investigate how travel time tomography and earthquake relocations can improve the understanding of the Miravalles geothermal field in Costa Rica. Finding the answer to this research ...