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  • 1.
    Dieterich, Christian
    et al.
    SMHI, Research Department, Oceanography.
    Wang, Shiyu
    SMHI, Research Department, Climate research - Rossby Centre.
    Schimanke, Semjon
    SMHI, Research Department, Oceanography.
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Klein, Birgit
    Hordoir, Robinson
    SMHI, Research Department, Oceanography.
    Samuelsson, Patrick
    SMHI, Research Department, Climate research - Rossby Centre.
    Liu, Ye
    SMHI, Research Department, Oceanography.
    Axell, Lars
    SMHI, Research Department, Oceanography.
    Höglund, Anders
    SMHI, Research Department, Oceanography.
    Meier, Markus
    SMHI, Research Department, Oceanography.
    Surface Heat Budget over the North Sea in Climate Change Simulations2019In: Atmosphere, ISSN 2073-4433, E-ISSN 2073-4433, Vol. 10, no 5, article id 272Article in journal (Refereed)
  • 2. Groger, Matthias
    et al.
    Dieterich, Christian
    SMHI, Research Department, Oceanography.
    Meier, Markus
    SMHI, Research Department, Oceanography.
    Schimanke, Semjon
    SMHI, Research Department, Oceanography.
    Thermal air-sea coupling in hindcast simulations for the North Sea and Baltic Sea on the NW European shelf2015In: Tellus. Series A, Dynamic meteorology and oceanography, ISSN 0280-6495, E-ISSN 1600-0870, Vol. 67, article id 26911Article in journal (Refereed)
    Abstract [en]

    This article compares interactively coupled atmosphere-ocean hindcast simulations with stand-alone runs of the atmosphere and ocean models using the recently developed regional ocean-atmosphere model NEMO-Nordic for the North Sea and Baltic Sea. In the interactively coupled run, the ocean and the atmosphere components were allowed to exchange mass, momentum and heat every 3 h. Our results show that interactive coupling significantly improves simulated winter sea surface temperatures (SSTs) in the Baltic Sea. The ocean and atmosphere stand-alone runs, respectively, resulted in too low sea surface and air temperatures over the Baltic Sea. These two runs suffer from too cold prescribed ERA40 SSTs, which lower air temperatures and weaken winds in the atmosphere only run. In the ocean-only run, the weaker winds additionally lower the vertical mixing thereby lowering the upward transport of warmer subpycnocline waters. By contrast, in the interactively coupled run, the ocean-atmosphere heat exchange evolved freely and demonstrated good skills in reproducing observed surface temperatures. Despite the strong impact on oceanic and atmospheric variables in the coupling area, no far reaching influence on atmospheric variables over land can be identified. In perturbation experiments, the different dynamics of the two coupling techniques is investigated in more detail by implementing strong positive winter temperature anomalies in the ocean model. Here, interactive coupling results in a substantially higher preservation of heat anomalies because the atmosphere also warmed which damped the ocean to atmosphere heat transfer. In the passively coupled set-up, this atmospheric feedback is missing, which resulted in an unrealistically high oceanic heat loss. The main added value of interactive air-sea coupling is twofold: (1) the elimination of any boundary condition at the air-sea interface and (2) the more realistic dynamical response to perturbations in the ocean-atmosphere heat balance, which will be essential in climate warming scenarios.

  • 3. Ho-Hagemann, Ha Thi Minh
    et al.
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Rockel, Burkhardt
    Zahn, Matthias
    Geyer, Beate
    Meier, Markus
    SMHI, Research Department, Oceanography.
    Effects of air-sea coupling over the North Sea and the Baltic Sea on simulated summer precipitation over Central Europe2017In: Climate Dynamics, ISSN 0930-7575, E-ISSN 1432-0894, Vol. 49, no 11-12, p. 3851-3876Article in journal (Refereed)
  • 4.
    Hordoir, Robinson
    et al.
    SMHI, Research Department, Oceanography.
    Axell, Lars
    SMHI, Research Department, Oceanography.
    Höglund, Anders
    SMHI, Research Department, Oceanography.
    Dieterich, Christian
    SMHI, Research Department, Oceanography.
    Fransner, Filippa
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Liu, Ye
    SMHI, Research Department, Oceanography.
    Pemberton, Per
    SMHI, Research Department, Oceanography.
    Schimanke, Semjon
    SMHI, Research Department, Oceanography.
    Andersson, Helén
    SMHI, Research Department, Oceanography.
    Ljungemyr, Patrik
    SMHI, Core Services.
    Nygren, Petter
    SMHI, Core Services.
    Falahat, Saeed
    SMHI, Core Services.
    Nord, Adam
    SMHI, Core Services.
    Jönsson, Anette
    SMHI, Core Services.
    Lake, Irene
    SMHI, Core Services. SMHI, Research Department, Climate research - Rossby Centre.
    Doos, Kristofer
    Hieronymus, Magnus
    SMHI, Research Department, Oceanography.
    Dietze, Heiner
    Loeptien, Ulrike
    Kuznetsov, Ivan
    Westerlund, Antti
    Tuomi, Laura
    Haapala, Jari
    Nemo-Nordic 1.0: a NEMO-based ocean model for the Baltic and North seas - research and operational applications2019In: Geoscientific Model Development, ISSN 1991-959X, E-ISSN 1991-9603, Vol. 12, no 1, p. 363-386Article in journal (Refereed)
  • 5.
    Meier, Markus
    et al.
    SMHI, Research Department, Oceanography.
    Edman, Moa
    SMHI, Research Department, Oceanography.
    Eilola, Kari
    SMHI, Research Department, Oceanography.
    Placke, Manja
    Neumann, Thomas
    Andersson, Helén
    SMHI, Research Department, Oceanography.
    Brunnabend, Sandra-Esther
    Dieterich, Christian
    SMHI, Research Department, Oceanography.
    Frauen, Claudia
    Friedland, Rene
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Gustafsson, Bo G.
    Gustafsson, Erik
    Isaev, Alexey
    Kniebusch, Madline
    Kuznetsov, Ivan
    Mueller-Karulis, Baerbel
    Omstedt, Anders
    Ryabchenko, Vladimir
    Saraiva, Sofia
    Savchuk, Oleg P.
    Assessment of Eutrophication Abatement Scenarios for the Baltic Sea by Multi-Model Ensemble Simulations2018In: Frontiers in Marine Science, E-ISSN 2296-7745, Vol. 5, article id UNSP 440Article in journal (Refereed)
  • 6.
    Meier, Markus
    et al.
    SMHI, Research Department, Oceanography.
    Edman, Moa
    SMHI, Research Department, Oceanography.
    Eilola, Kari
    SMHI, Research Department, Oceanography.
    Placke, Manja
    Neumann, Thomas
    Andersson, Helén
    SMHI, Research Department, Oceanography.
    Brunnabend, Sandra-Esther
    Dieterich, Christian
    SMHI, Research Department, Oceanography.
    Frauen, Claudia
    Friedland, Rene
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Gustafsson, Bo G.
    Gustafsson, Erik
    Isaev, Alexey
    Kniebusch, Madline
    Kuznetsov, Ivan
    Muller-Karulis, Barbel
    Naumann, Michael
    Omstedt, Anders
    Ryabchenko, Vladimir
    Saraiva, Sofia
    Savchuk, Oleg P.
    Assessment of Uncertainties in Scenario Simulations of Biogeochemical Cycles in the Baltic Sea2019In: Frontiers in Marine Science, E-ISSN 2296-7745, Vol. 6, article id UNSP 46Article in journal (Refereed)
  • 7. Paetsch, Johannes
    et al.
    Burchard, Hans
    Dieterich, Christian
    SMHI, Research Department, Oceanography.
    Graewe, Ulf
    Gröger, Matthias
    SMHI, Research Department, Oceanography.
    Mathis, Moritz
    Kapitza, Hartmut
    Bersch, Manfred
    Moll, Andreas
    Pohlmann, Thomas
    Su, Jian
    Ho-Hagemann, Ha T. M.
    Schulz, Achim
    Elizalde, Alberto
    Eden, Carsten
    An evaluation of the North Sea circulation in global and regional models relevant for ecosystem simulations2017In: Ocean Modelling, ISSN 1463-5003, E-ISSN 1463-5011, Vol. 116, p. 70-95Article in journal (Refereed)
  • 8.
    Saraiva, Sofia
    et al.
    SMHI, Research Department, Oceanography.
    Meier, Markus
    SMHI, Research Department, Oceanography.
    Andersson, Helén
    SMHI, Research Department, Oceanography.
    Höglund, Anders
    SMHI, Research Department, Oceanography.
    Dieterich, Christian
    SMHI, Research Department, Oceanography.
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Hordoir, Robinson
    SMHI, Research Department, Oceanography.
    Eilola, Kari
    SMHI, Research Department, Oceanography.
    Baltic Sea ecosystem response to various nutrient load scenarios in present and future climates2019In: Climate Dynamics, ISSN 0930-7575, E-ISSN 1432-0894, Vol. 52, no 5-6, p. 3369-3387Article in journal (Refereed)
  • 9.
    Saraiva, Sofia
    et al.
    SMHI, Research Department, Oceanography.
    Meier, Markus
    SMHI, Research Department, Oceanography.
    Andersson, Helén
    SMHI, Research Department, Oceanography.
    Höglund, Anders
    SMHI, Research Department, Oceanography.
    Dieterich, Christian
    SMHI, Research Department, Oceanography.
    Groger, Matthias
    SMHI, Research Department, Oceanography.
    Hordoir, Robinson
    SMHI, Research Department, Oceanography.
    Eilola, Kari
    SMHI, Research Department, Oceanography.
    Uncertainties in Projections of the Baltic Sea Ecosystem Driven by an Ensemble of Global Climate Models2019In: FRONTIERS IN EARTH SCIENCE, ISSN 2296-6463, Vol. 6, article id UNSP 244Article in journal (Refereed)
  • 10. Sein, Dmitry V.
    et al.
    Mikolajewicz, Uwe
    Gröger, Matthias
    SMHI, Research Department, Oceanography.
    Fast, Irina
    Cabos, William
    Pinto, Joaquim G.
    Hagemann, Stefan
    Semmler, Tido
    Izquierdo, Alfredo
    Jacob, Daniela
    Regionally coupled atmosphere-ocean-sea ice-marine biogeochemistry model ROM: 1. Description and validation2015In: Journal of Advances in Modeling Earth Systems, ISSN 1942-2466, Vol. 7, no 1, p. 268-304Article in journal (Refereed)
    Abstract [en]

    The general circulation models used to simulate global climate typically feature resolution too coarse to reproduce many smaller-scale processes, which are crucial to determining the regional responses to climate change. A novel approach to downscale climate change scenarios is presented which includes the interactions between the North Atlantic Ocean and the European shelves as well as their impact on the North Atlantic and European climate. The goal of this paper is to introduce the global ocean-regional atmosphere coupling concept and to show the potential benefits of this model system to simulate present-day climate. A global ocean-sea ice-marine biogeochemistry model (MPIOM/HAMOCC) with regionally high horizontal resolution is coupled to an atmospheric regional model (REMO) and global terrestrial hydrology model (HD) via the OASIS coupler. Moreover, results obtained with ROM using NCEP/NCAR reanalysis and ECHAM5/MPIOM CMIP3 historical simulations as boundary conditions are presented and discussed for the North Atlantic and North European region. The validation of all the model components, i.e., ocean, atmosphere, terrestrial hydrology, and ocean biogeochemistry is performed and discussed. The careful and detailed validation of ROM provides evidence that the proposed model system improves the simulation of many aspects of the regional climate, remarkably the ocean, even though some biases persist in other model components, thus leaving potential for future improvement. We conclude that ROM is a powerful tool to estimate possible impacts of climate change on the regional scale.

1 - 10 of 10
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  • harvard1
  • ieee
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  • vancouver
  • Other style
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