A5031700876- Atmospheric and Environmental Gas Dynamics
- Spectroscopy and Laser Applications
- Isotope Analysis in Ecology
- Groundwater and Isotope Geochemistry
- Arctic and Antarctic ice dynamics
- Meteorological Phenomena and Simulations
- Marine and coastal ecosystems
- Atmospheric aerosols and clouds
- Methane Hydrates and Related Phenomena
- Climate variability and models
- Nuclear Physics and Applications
- Geology and Paleoclimatology Research
- Oceanographic and Atmospheric Processes
- Fluid Dynamics and Turbulent Flows
- Impact of Light on Environment and Health
- Atmospheric Ozone and Climate
- Cryospheric studies and observations
- Spacecraft and Cryogenic Technologies
- Underwater Vehicles and Communication Systems
- Wind and Air Flow Studies
- Atomic and Subatomic Physics Research
- Hydrocarbon exploration and reservoir analysis
- Quantum, superfluid, helium dynamics
- Geological Studies and Exploration
- Atmospheric chemistry and aerosols
Bjerknes Centre for Climate Research
2018-2024
University of Bergen
2018-2023
The aim of the research project “Innovative Strategies for Observations in Arctic Atmospheric Boundary Layer (ISOBAR)” is to substantially increase understanding stable atmospheric boundary layer (SBL) through a combination well-established and innovative observation methods as well by models different complexity. During three weeks February 2017, first field campaign was carried out over sea ice Bothnian Bay vicinity Finnish island Hailuoto. were based on ground-based eddy-covariance (EC),...
Abstract The Innovative Strategies for Observations in the Arctic Atmospheric Boundary Layer Program (ISOBAR) is a research project investigating stable atmospheric boundary layer (SBL) processes, whose representation still poses significant challenges state-of-the-art numerical weather prediction (NWP) models. In ISOBAR ground-based flux and profile observations are combined with remote sensing methods extensive usage of different unmanned aircraft systems (UAS). During February 2017 2018...
Abstract The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere–ocean research program investigating climate processes in the source region of densest waters Atlantic meridional overturning circulation. During February and March 2018, field campaign was executed over southern that utilized range observing platforms to investigate critical region, including vessel, aircraft, moorings, sea gliders, floats, meteorological buoy. A remarkable feature highly deployment platforms,...
Abstract. Cavity ring-down spectroscopy (CRDS) has allowed for increasingly widespread, in situ observations of trace gases, including the stable isotopic composition water vapor. However, gathering harsh environments still poses challenges, particularly regard to observing small-scale exchanges taking place between surface and atmosphere. It is especially important resolve vertical structure these processes. We have designed ISE-CUBE system as a modular CRDS deployment profiling isotopes...
Abstract. In order to gain understanding on the vertical structure of atmospheric water vapour above mountain lakes and assess its link with isotopic composition lake small-scale dynamics (i.e. valley winds, thermal convection complex terrain), L-WAIVE (Lacustrine-Water vApor Isotope inVentory Experiment) field campaign was conducted in Annecy French Alps during 10 d June 2019. This based an original experimental synergy between a suite ground-based, boat-borne, two ultra-light aircraft...
Abstract. Laser active remote sensing of tropospheric water vapor is a promising technology to complement passive observational means in order enhance our understanding processes governing the global hydrological cycle. In such context, we investigate potential monitoring both H216O and its isotopologue HD16O using differential absorption lidar (DIAL) allowing for ground-based measurements at high spatio-temporal resolution (150 m 10 min) lower troposphere. This paper presents sensitivity...
Abstract. Here we describe a versatile device to produce flow of air-vapour mixture with controlled humidity and water isotope composition based on microdrop dispensing technology. By precisely controlling the contribution from two dispenser heads into carrier gas stream, allows set stream any ratio between end member waters. In addition presenting design several performance characteristics new system, application examples. First, utilize determine common artifact vapour analyzers, known as...
Marine cold-air outbreaks (mCAOs) are a characteristic type of high-impact weather in the European Arctic and characterized by an intense water cycle where polar cloud processes play important role. Model simulations forecasts mCAO events challenging associated with poor predictability. One reason is that related to interact one another on wide range scales. In regional models, some these resolved others fully or partly parameterised. To test improve numerical prediction additional...
Abstract. The ISLAS2020 field campaign during February and March 2020 set out to obtain a unique dataset describing the Arctic water cycle using stable isotope (SWI) observations. Our observation strategy focused on measuring evaporation, deposition, precipitation, all of which are commonly sub-grid scale processes in numerical weather climate models. Uncertain parameterizations for these can lead compensating errors, go unnoticed; however, evaporation precipitation also be investigated with...
Abstract. In order to gain understanding on the vertical structure of atmospheric water vapour above mountain lakes and assess respective influence evaporation advection processes, L-WAIVE (Lacustrine-Water vApor Isotope inVentory Experiment) field campaign was conducted in Annecy valley French Alps June 2019. This based a synergy between suite ground-based, boat-borne, airborne measuring platforms implemented characterise thermodynamic isotopic state lake environment using both in-situ...
Abstract. Here we describe a versatile device to produce gas stream with precisely controlled water vapour mixing ratio and stable isotope composition based on microdrop dispensing technology. To moist airstream, the technology ejects micrometre-size droplets that completely evaporate into of carrier heated 60 ∘C. By controlling contribution standards from two dispenser heads stream, allows one set air–vapour any between endmember waters. We show Allan deviation is 10 ppmv over more...
<p>The vertical structure of the water vapor field in lower troposphere is only sparsely documented mountainous regions and particularly above Alpine lakes. This may part due to complexity system, being intimately linked orography surrounding lakes forcing topography-induced winds. The question arises as how extent evaporation processes over these are influenced by larger scale forcing, with regard dimension.</p><p>In order gain understanding on...
Abstract. Over the last two decades, cavity ring-down spectroscopy (CRDS) has allowed for increasingly widespread, in-situ observations of trace gases in vapor, including stable isotopic composition water vapor. However, observation harsh environments pose a particular challenge, as these CRDS analyzers are designed use conventional laboratory. As such, field deployments typically enclose instrument "quasi-laboratory". These often involve substantial logistical effort, addition to...