Characteristics of the ocean simulations in the Max Planck Institute Ocean Model (MPIOM) the ocean component of the MPI-Earth system model
Johann H. Jungclaus,Nils Fischer,Helmuth Haak,Katja Lohmann,Jochem Marotzke,Daniela Matei,Uwe Mikolajewicz,Dirk Notz,J.-S. von Storch +8 more
TLDR
In this paper, the performance of the ocean/sea-ice model MPIOM, coupled to a new version of the atmosphere model ECHAM6 and modules for land surface and ocean biogeochemistry, is assessed for two model versions with different grid resolution in the ocean.Abstract:
[1] MPI-ESM is a new version of the global Earth system model developed at the Max Planck Institute for Meteorology. This paper describes the ocean state and circulation as well as basic aspects of variability in simulations contributing to the fifth phase of the Coupled Model Intercomparison Project (CMIP5). The performance of the ocean/sea-ice model MPIOM, coupled to a new version of the atmosphere model ECHAM6 and modules for land surface and ocean biogeochemistry, is assessed for two model versions with different grid resolution in the ocean. The low-resolution configuration has a nominal resolution of 1.5°, whereas the higher resolution version features a quasiuniform, eddy-permitting global resolution of 0.4°. The paper focuses on important oceanic features, such as surface temperature and salinity, water mass distribution, large-scale circulation, and heat and freshwater transports. In general, these integral quantities are simulated well in comparison with observational estimates, and improvements in comparison with the predecessor system are documented; for example, for tropical variability and sea ice representation. Introducing an eddy-permitting grid configuration in the ocean leads to improvements, in particular, in the representation of interior water mass properties in the Atlantic and in the representation of important ocean currents, such as the Agulhas and Equatorial current systems. In general, however, there are more similarities than differences between the two grid configurations, and several shortcomings, known from earlier versions of the coupled model, prevail.read more
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Climate and carbon cycle changes from 1850 to 2100 in MPI‐ESM simulations for the Coupled Model Intercomparison Project phase 5
Marco Giorgetta,Johann H. Jungclaus,Christian Reick,Stephanie Legutke,Juergen Bader,Michael Böttinger,Victor Brovkin,Traute Crueger,Monika Esch,Kerstin Fieg,Ksenia Glushak,Veronika Gayler,Helmuth Haak,Heinz-Dieter Hollweg,Tatiana Ilyina,Stefan Kinne,Luis Kornblueh,Daniela Matei,Thorsten Mauritsen,Uwe Mikolajewicz,Wolfgang A. Mueller,Dirk Notz,Felix Pithan,Thomas Raddatz,Sebastian Rast,Rene Redler,Erich Roeckner,Hauke Schmidt,Reiner Schnur,Joachim Segschneider,Katharina Six,Martina Stockhause,Claudia Timmreck,Jörg Wegner,Heiner Widmann,Karl-Hermann Wieners,Martin Claussen,Jochem Marotzke,Bjorn Stevens +38 more
TL;DR: In this article, the Max-Planck-Institute Earth System Model (MPI-ESM) is used in the Coupled Model Intercomparison Project phase 5 (CMIP5) in a series of climate change experiments for either idealized CO2-only forcing or forcings based on observations and the Representative Concentration Pathway (RCP) scenarios.
Journal ArticleDOI
Exceptional twentieth-century slowdown in Atlantic Ocean overturning circulation
Stefan Rahmstorf,Jason E. Box,Georg Feulner,Michael E. Mann,Alexander Robinson,Alexander Robinson,Alexander Robinson,Scott Rutherford,Erik Schaffernicht +8 more
TL;DR: In this paper, the authors present multiple lines of evidence suggesting that this cooling may be due to a reduction in the AMOC over the twentieth century and particularly after 1970, and discuss a possible contribution of the melting of the Greenland Ice Sheet to the slowdown.
Journal ArticleDOI
Developments in the MPI-M Earth System Model version 1.2 (MPI-ESM1.2) and Its Response to Increasing CO2.
Thorsten Mauritsen,Thorsten Mauritsen,Jürgen Bader,Tobias Becker,Jörg Behrens,Matthias Bittner,Renate Brokopf,Victor Brovkin,Martin Claussen,Traute Crueger,Monika Esch,Irina Fast,Stephanie Fiedler,Dagmar Fläschner,Veronika Gayler,Marco Giorgetta,Daniel S. Goll,Helmuth Haak,Stefan Hagemann,Christopher Hedemann,Cathy Hohenegger,Tatiana Ilyina,Thomas Jahns,Diego Jiménez-de-la-Cuesta,Johann H. Jungclaus,Thomas Kleinen,Silvia Kloster,Daniela Kracher,Stefan Kinne,Deike Kleberg,Gitta Lasslop,Luis Kornblueh,Jochem Marotzke,Daniela Matei,Katharina Meraner,Uwe Mikolajewicz,Kameswarrao Modali,Benjamin Möbis,Benjamin Möbis,Wolfgang A. Müller,Julia E. M. S. Nabel,Christine Nam,Christine Nam,Dirk Notz,Sarah-Sylvia Nyawira,Sarah-Sylvia Nyawira,Hanna Paulsen,Karsten Peters,Robert Pincus,Holger Pohlmann,Julia Pongratz,Julia Pongratz,Max Popp,Max Popp,Thomas Raddatz,Sebastian Rast,Rene Redler,Christian Reick,Tim Rohrschneider,Vera Schemann,Vera Schemann,Vera Schemann,Hauke Schmidt,Reiner Schnur,Uwe Schulzweida,Katharina Six,Lukas Stein,Irene Stemmler,Bjorn Stevens,Jin-Song von Storch,Fangxing Tian,Fangxing Tian,Aiko Voigt,Philipp de Vrese,Karl-Hermann Wieners,Stiig Wilkenskjeld,Alexander J. Winkler,Erich Roeckner +77 more
TL;DR: The model has a climate sensitivity to a doubling of CO2 over preindustrial conditions of 2.77 K, maintaining the previously identified highly nonlinear global mean response to increasing CO2 forcing, which nonetheless can be represented by a simple two‐layer model.
Journal ArticleDOI
Carbon–Concentration and Carbon–Climate Feedbacks in CMIP5 Earth System Models
Vivek K. Arora,George J. Boer,Pierre Friedlingstein,Michael Eby,Chris D. Jones,James R. Christian,Gordon B. Bonan,Laurent Bopp,Victor Brovkin,Patricia Cadule,Tomohiro Hajima,Tatiana Ilyina,Keith Lindsay,Jerry Tjiputra,Tongwen Wu +14 more
TL;DR: In this paper, the magnitude and evolution of parameters that characterize feedbacks in the coupled carbon-climate system are compared across nine Earth system models (ESMs), based on results from biogeochemically, radiatively, and fully coupled simulations in which CO2 increases at a rate of 1% yr−1.
Carbon-concentration and carbon-climate feedbacks in CMIP5 Earth system models
Vivek K. Arora,George J. Boer,Pierre Friedlingstein,Michael Eby,Chris D. Jones,James R. Christian,Gordon B. Bonan,Laurent Bopp,Victor Brovkin,Patricia Cadule,Tomohiro Hajima,Tatiana Ilyina,Keith Lindsay,Jerry Tjiputra,Tongwen Wu +14 more
TL;DR: In this paper, the magnitude and evolution of parameters that characterize feedbacks in the coupled carbon-climate system are compared across nine Earth system models (ESMs), based on results from biogeochemically, radiatively, and fully coupled simulations in which CO2 increases at a rate of 1% yr−1.
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