This study estimates MJO change under the A1B greenhouse gas emission scenario using the ECHAM5 AGCM whose coupled version (ECHAM5/MPI-OM) has simulated best MJO variance among fourteen CGCMs. The model has a horizontal resolution at T319 (about 40 km) and is forced by the monthly evolving SST derived from the ECHAM5/MPI-OM at a lower resolution of T63 (about 200 km). Two runs are carried out c...

Cloud microphysics and aerosol indirect effects in the global climate model ECHAM5-HAM U. Lohmann, P. Stier, C. Hoose, S. Ferrachat, E. Roeckner, and J. Zhang Institute of Atmospheric and Climate Science, ETH Zurich, Switzerland Department of Environmental Science and Engineering, California Institute of Technology, Pasadena, USA Max Planck Institute for Meteorology, Hamburg, Germany Meteorolog...

The existing 20-member ensemble of 50 yr ECHAM5/MPI-OM simulations provides a reasonably realisti Monte Carlo sample of the El Niño–Southern Oscillation (ENSO). Localized observations of sea surface temperature (SST), zonal wind speed and thermocline depth are assimilated in the ensemble using sequential importance sampling to adjust the weight of ensemble members. We determine optimal observat...

The aerosol-climate model ECHAM5-HAM P. Stier, J. Feichter, S. Kinne, S. Kloster, E. Vignati, J. Wilson, L. Ganzeveld, I. Tegen, M. Werner, Y. Balkanski, M. Schulz, and O. Boucher Max Planck Institute for Meteorology, Hamburg, Germany Institute for the Environment and Sustainability, European Commission Joint Research Centre, Ispra, Italy Max Planck Institute for Chemistry, Mainz, Germany Max P...