• Bedymo: A combined quasi-geostrophic and primitive equation model in σ coordinates 

      Spensberger, Clemens; Thorsteinsson, Trond; Spengler, Thomas (Journal article; Peer reviewed, 2022)
      This paper introduces the Bergen Dynamical Model (Bedymo), an idealized atmospheric circulation model, which combines the quasi-geostrophic approximation and the hydrostatic primitive equations into one modelling framework. ...
    • Characteristics of cyclones following different pathways in the Gulf Stream region 

      Tsopouridis, Leonidas; Spensberger, Clemens; Spengler, Thomas (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 ...
    • The connection between the Southern Annular Mode and a feature-based perspective on Southern Hemisphere mid-latitude winter variability 

      Spensberger, Clemens; Reeder, Michael John; Spengler, Thomas; Patterson, Matthew (Journal article; Peer reviewed, 2020)
      This article provides a reconciling perspective on the two main, but contradictory, interpretations of the southern annular mode (SAM). SAM was originally thought to characterize meridional shifts in the storm track across ...
    • Cyclone Intensification in the Kuroshio Region and its relation to the Sea Surface Temperature Front and Upper‐Level Forcing 

      Tsopouridis, Leonidas; Spensberger, Clemens; Spengler, Thomas (Journal article; Peer reviewed, 2021)
      The Northwest Pacific features strong sea surface temperature (SST) gradients providing favourable conditions for wintertime cyclone intensification in the midlatitudes. To estimate the relative contribution of the SST ...
    • Driving Mechanisms of an Extreme Winter Sea Ice Breakup Event in the Beaufort Sea 

      Davy, Richard; Olason, Einar; Rampal, Pierre; Spensberger, Clemens; Williams, Timothy; Korosov, Anton; Spengler, Thomas; Rheinlænder, Jonathan W. (Journal article; Peer reviewed, 2022)
      The thick multiyear sea ice that once covered large parts of the Arctic is increasingly being replaced by thinner and weaker first-year ice, making it more vulnerable to breakup by winds. We use the neXtSIM sea ice model ...
    • Dynamical drivers of Greenland blocking in climate models 

      Michel, Clio; Madonna, Erica; Spensberger, Clemens; Li, Camille; Outten, Stephen (Journal article; Peer reviewed, 2021)
      Blocking over Greenland is known to lead to strong surface impacts, such as ice sheet melting, and a change in its future frequency can have important consequences. However, as previous studies demonstrated, climate models ...
    • Dynamics of concurrent and sequential Central European and Scandinavian heatwaves 

      Spensberger, Clemens; Madonna, Erica; Boettcher, Maxi; Grams, Christian M.; Papritz, Lukas; Quinting, Julian F.; Rothlisberger, Matthias; Sprenger, Michael; Zschenderlein, Philipp (Journal article; Peer reviewed, 2020)
      In both 2003 and 2018 a heatwave in Scandinavia in July was followed by a heatwave in Central Europe in August. Whereas the transition occurred abruptly in 2003, it was gradual in 2018 with a 12-day period of concurrent ...
    • The Effect of Sea Surface Temperature Fronts on Atmospheric Frontogenesis 

      Reeder, Michael J; Spengler, Thomas; Spensberger, Clemens (Journal article; Peer reviewed, 2021)
      It is thought that the sensible heat fluxes associated with sea surface temperature (SST) fronts can affect the genesis and evolution of atmospheric fronts. An analytic model is developed and used to explore this idea. The ...
    • Feature-Based Jet Variability in the Upper Troposphere 

      Spensberger, Clemens; Spengler, Thomas (Journal article; Peer reviewed, 2020)
      Jets in the upper troposphere constitute a cornerstone of both synoptic meteorology and climate dynamics, providing a direct link between weather and midlatitude climate variability. Conventionally, jet variability is often ...
    • Front–orography interactions during landfall of the 1992 New Year's Day Storm 

      Spensberger, Clemens; Schemm, Sebastian (Journal article; Peer reviewed, 2020)
      Although following a common synoptic evolution for this region, the 1992 New Year's Day Storm was associated with some of the strongest winds observed along the Norwegian west coast. The narrow wind band along its bent-back ...
    • New approaches to investigate the influence of orographic and dynamic blocking on large-scale atmospheric flow 

      Spensberger, Clemens (Doctoral thesis, 2015-01-15)
      Orographic and dynamic blocks have a profound influence on both weather and climate. The persistence of dynamic blocks can, for example, lead to the build-up of extreme temperature anomalies or droughts. In addition, ...
    • A New Look at Deformation as a Diagnostic for Large-Scale Flow 

      Spensberger, Clemens; Spengler, Thomas (Peer reviewed; Journal article, 2014-11)
      Deformation plays a key role in atmospheric dynamics because it provides a dynamical measure of the interaction between different scales, such as in frontogenesis. A climatology of deformation constructed from Interim ECMWF ...
    • Nordic Seas Heat Loss, Atlantic Inflow, and Arctic Sea Ice cover over the last century 

      Smedsrud, Lars Henrik; Muilwijk, Morven; Eldevik, Tor; Årthun, Marius; Brakstad, Ailin; Madonna, Erica; Lauvset, Siv Kari; Spensberger, Clemens; Born, Andreas; Drange, Helge; Jeansson, Emil; Li, Camille; Olsen, Are; Skagseth, Øystein; Slater, Donald; Straneo, Fiammetta; Våge, Kjetil (Journal article; Peer reviewed, 2021)
      Poleward ocean heat transport is a key process in the earth system. We detail and review the northward Atlantic Water (AW) flow, Arctic Ocean heat transport, and heat loss to the atmosphere since 1900 in relation to sea ...
    • Overview of the Norwegian Earth System Model (NorESM2) and key climate response of CMIP6 DECK, historical, and scenario simulations 

      Seland, Øyvind; Bentsen, Mats; Oliviè, Dirk Jan Leo; Toniazzo, Thomas; Gjermundsen, Ada; Graff, Lise Seland; Debernard, Jens Boldingh; Gupta, Alok Kumar; He, Yan-Chun; Kirkevåg, Alf; Schwinger, Jörg; Tjiputra, Jerry; Aas, Kjetil Schanke; Bethke, Ingo; Fan, Yuanchao; Griesfeller, Jan; Grini, Alf; Guo, Chuncheng; Ilicak, Mehmet; Karset, Inger Helene H.; Landgren, Oskar Andreas; Liakka, Johan; Moseid, Kine Onsum; Nummelin, Aleksi; Spensberger, Clemens; Tang, Hui; Zhang, Zhongshi; Heinze, Christoph; Iversen, Trond; Schulz, Michael (Journal article; Peer reviewed, 2020-12)
      The second version of the coupled Norwegian Earth System Model (NorESM2) is presented and evaluated. NorESM2 is based on the second version of the Community Earth System Model (CESM2) and shares with CESM2 the computer ...
    • Sensitivity of Air-Sea Heat Exchange in Cold-Air Outbreaks to Model Resolution and Sea-Ice Distribution 

      Spensberger, Clemens; Spengler, Thomas (Journal article; Peer reviewed, 2021)
      Modeling air-sea interactions during cold air outbreaks poses a major challenge because of the vast range of scales and physical processes involved. Using the Polar WRF model, we investigate the sensitivity of downstream ...