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Blar i Geophysical Institute på tittel 
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Viser treff 179-198 av 1005

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    • Development of a new urban climate model based on the model PALM – Project overview, planned work, and first achievements 

      Maronga, Bjørn; Gross, Günter; Raasch, Siegfried; Banzhaf, Sabine; Forkel, Renate; Heldens, Wieke; Kanani-Sühring, Farah; Matzarakis, Andreas; Mauder, Matthias; Pavlik, Dirk; Pfafferott, Jens; Schubert, Sebastian; Seckmeyer, Gunther; Sieker, Heiko; Winderlich, Kristina (Journal article; Peer reviewed, 2019)
      In this article we outline the model development planned within the joint project Model-based city planning and application in climate change (MOSAIK). The MOSAIK project is funded by the German Federal Ministry of Education ...
    • Development of an atmospheric chemistry model coupled to the PALM model system 6.0: implementation and first applications 

      Khan, Basit; Banzhaf, Sabine; Chan, Edward C.; Forkel, Renate; Kanani-Sühring, Farah; Ketelsen, Klaus; Kurppa, Mona; Maronga, Bjørn; Mauder, Matthias; Raasch, Siegfried; Russo, Emmanuele; Schaap, Martijn; Sühring, Matthias (Journal article; Peer reviewed, 2021)
      In this article we describe the implementation of an online-coupled gas-phase chemistry model in the turbulence-resolving PALM model system 6.0 (formerly an abbreviation for Parallelized Large-eddy Simulation Model and now ...
    • Development of an automatic thresholding method for wake meandering studies and its application to the data set from scanning wind lidar 

      Krutova, Maria; Paskyabi, Mostafa Bakhoday; Reuder, Joachim; Nielsen, Finn Gunnar (Journal article; Peer reviewed, 2022)
      Wake meandering studies require knowledge of the instantaneous wake evolution. Scanning lidar data are used to identify the wind flow behind offshore wind turbines but do not immediately reveal the wake edges and centerline. ...
    • Development of community, capabilities and understanding through unmanned aircraft-based atmospheric research: The LAPSE-RATE campaign 

      De Boer, Gijs; Diehl, Constantin; Jacob, Jamey; Houston, Adam; Smith, Suzanne; Chilson, Phillip B.; Schmale, David; Intrieri, Janet; Pinto, James; Elston, Jack; Brus, David; Kemppinen, Osku; Clark, Alex; Lawrence, Dale; Bailey, Sean; Sama, Michael; Frazier, Amy; Crick, Christopher; Natalie, Victoria; Pillar-Little, Elizabeth; Klein, Petra; Waugh, Sean; Lundquist, Julie K.; Barbieri, Lindsay; Kral, Stephan; Jensen, Anders; Dixon, Cory; Borenstein, Steven; Hesselius, Daniel; Human, Kathleen; Hall, Philip; Argrow, Brian; Thronberry, Troy; Wright, Randy; Kelly, Jason (Peer reviewed; Journal article, 2020)
      Because unmanned aircraft systems (UAS) offer new perspectives on the atmosphere, their use in atmospheric science is expanding rapidly. In support of this growth, the International Society for Atmospheric Research Using ...
    • Diabatic Heating as a Pathway for Cyclone Clustering Encompassing the Extreme Storm Dagmar 

      Weijenborg, Christian; Spengler, Thomas (Journal article, 2020)
      Contrary to the general notion that extratropical cyclones reduce baroclinicity, the baroclinicity is found to be enhanced in the wake of the extreme winter storm Dagmar. Thus, individual storms can increase baroclinicity, ...
    • Diabatic heating governs the seasonality of the Atlantic Niño 

      Nnamchi, Hyacinth C; Latif, Mojib; Keenlyside, Noel; Kjellsson, Joakim; Richter, Ingo (Journal article; Peer reviewed, 2021)
      The Atlantic Niño is the leading mode of interannual sea-surface temperature (SST) variability in the equatorial Atlantic and assumed to be largely governed by coupled ocean-atmosphere dynamics described by the Bjerknes-feedback ...
    • Diagnosing and Understanding the AMOC Biases in NorESM 

      Ivanova, Detelina; Bentsen, Mats; Ilicak, Mehmet; Gao, Chuncheng; Drange, Helge (Conference object; Peer reviewed, 2014)
      We investigate the Atlantic Meridional Overturning Circulation (AMOC) in the Norwegian Earth System Model (NorESM) featuring isopycnal ocean component (MICOM). The Coupled Model Intercomparison Phase 5 (CMIP5) NorESM ...
    • Diagnosing ocean tracer transport from Sellafield and Dounreay by equivalent diffusion and age 

      Orre, Steinar; Gao, Yongqi; Drange, Helge; Deleersnijder, Eric (Peer reviewed; Journal article, 2008-09-27)
      A simple approach for estimating the equivalent diffusion for diagnosing tracer transport is proposed. Two different expressions are derived; one is based directly on an analytical solution of the two-dimensional ...
    • A diagnosis of warm-core and cold-core extratropical cyclone development using the Zwack–Okossi equation 

      Azad, Roohollah; Sorteberg, Asgeir (Peer reviewed; Journal article, 2009)
      In this study, the development of a warm-core and cold-core extratropical cyclone over North Atlantic is examined. The geostrophic relative vorticity tendency used to diagnose the development is calculated utilizing the ...
    • A Diagnostic Diagram to Understand Atmosphere-ocean Dynamics in the Southern North Sea at High Wind Spe 

      Kettle, Anthony (Peer reviewed; Journal article, 2014)
      Long time series of offshore meteorological measurements in the lower marine atmospheric boundary layer show dynamical regimes and variability that are forced partly by interaction with the underlying sea surface and partly ...
    • A diagram of wind speed versus air-sea temperature difference to understand the marine atmospheric boundary layer 

      Kettle, Anthony (Peer reviewed; Journal article, 2015-08-28)
      This contribution reviews the dynamics in the marine atmospheric boundary layer (MABL) with a diagnostic diagram: wind speed versus air-sea temperature difference or U-ΔT. The diagram was first used by Alfred Woodcock in ...
    • Differential absorption lidar for water vapor isotopologues in the 1.98 μm spectral region: Sensitivity analysis with respect to regional atmospheric variability 

      Hamperl, Jonas; Capitaine, Clément; Dherbecourt, Jean-Baptiste; Raybaut, Myriam; Chazette, Patrick; Totems, Julien; Grouiez, Bruno; Régalia, Laurence; Santagata, Rosa; Evesque, Corinne; Melkonian, Jean-Michel; Godard, Antoine; Seidl, Andrew; Sodemann, Harald; Flamant, Cyrille (Journal article; Peer reviewed, 2021)
      Laser active remote sensing of tropospheric water vapor is a promising technology to complement passive observational means in order to enhance our understanding of processes governing the global hydrological cycle. In ...
    • Direct and Indirect Effects of Surface Fluxes on Moist Baroclinic Development in an Idealized Framework 

      Haualand, Kristine Flacké; Spengler, Thomas (Journal article; Peer reviewed, 2020-09)
      The convoluted role of surface sensible and latent heat fluxes on moist baroclinic development demands a better understanding to disentangle their local and remote effects. Including diabatic effects in the Eady model, the ...
    • Direct measurements of the mean flow and eddy kinetic energy structure of the upper ocean circuletion in the NE Atlantic 

      Knutsen, Øyvind; Svendsen, Harald; Østerhus, Svein; Rossby, Tom; Hansen, Bogi (Journal article, 2005-07-19)
      The upper ocean circulation in the sub-polar northeast Atlantic has been a challenge to quantify due to strong and variable wind-forcing, and strong and variable deep currents that lead to large uncertainties in the use ...
    • Direct ocean surface velocity measurements from space: Improved quantitative interpretation of Envisat ASAR observations 

      Johannessen, Johnny A.; Chapron, B.; Collard, F.; Kudryavtsev, Vladimir; Mouchet, A.; Akimov, D.; Dagestad, Knut-Frode (Peer reviewed; Journal article, 2008-11-29)
      Previous analysis of Advanced Synthetic Aperture Radar (ASAR) signals collected by ESA’s Envisat has demonstrated a very valuable source of high-resolution information, namely, the line-of-sight velocity of the moving ocean ...
    • Directional wave measurements using an autonomous vessel 

      Hole, L. R.; Fer, Ilker; Peddie, David (Peer reviewed; Journal article, 2016-08-01)
      An autonomous vessel, the Offshore Sensing Sailbuoy, was used for wave measurements near the Ekofisk oil platform complex in the North Sea (56.5º N, 3.2º E, operated by ConocoPhillips) from 6 to 20 November 2015. Being 100 ...
    • Directly measured currents and estimated transport pathways of Atlantic Water between 59.58N and the Iceland-Faroes-Scotland Ridge 

      Childers, Katelin; Flagg, Charles; Rossby, Thomas; Schrum, Corinna (Peer reviewed; Journal article, 2015-11-24)
      Using vessel-mounted acoustic Doppler current profiler data from four different routes between Scotland, Iceland and Greenland, we map out the mean flow of water in the top 400 m of the northeastern North Atlantic. The ...
    • Disappearance of Pacific Water in the northwestern Fram Strait 

      Falck, Eva; Kattner, Gerhard; Budéus, Gereon (Journal article, 2005-07-28)
      Water of Pacific origin, entering the Arctic Ocean through the Bering Strait, exits the Arctic Ocean through the Canadian Archipelago and the Fram Strait. The amount and timing of Pacific Water export through these gates ...
    • Dispersion and abundance of salmon lice (Lepeophtheirus salmonis) in a Norwegian fjord system 

      Johnsen, Ingrid Askeland (Master thesis, 2011-11-20)
      Based on numerical results of currents from a high resolution fjord model, dispersion of salmon lice (Lepeophtheirus salmonis) in the Hardangerfjord has been modelled. The results show that salmon lice abundance in the ...
    • Dissipation measurements using temperature microstructure from an underwater glider 

      Peterson, Algot Kristoffer; Fer, Ilker (Peer reviewed; Journal article, 2014-09)
      Microstructure measurements of temperature and current shear are made using an autonomous underwater glider. The glider is equipped with fast-response thermistors and airfoil shear probes, providing measurements of dissipation ...

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