Erich Roeckner

TL;DR: In this article, eleven coupled climate-carbon cycle models were used to study the coupling between climate change and the carbon cycle. But, there was still a large uncertainty on the magnitude of these sensitivities.

TL;DR: In this paper, a detailed description of the fourth generation ECHAM model is presented, which includes a semi-Lagrangian transport scheme for water vapour, cloud water and trace substances, a new radiation scheme (ECMWF) with modifications concerning the water vapor continuum, cloud optical properties and greenhouse gases.

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.

TL;DR: In this paper, the authors present results from a global climate model with sufficient resolution in the tropics to adequately represent the narrow equatorial upwelling and low-frequency waves, when the model is forced by a realistic future scenario of increasing greenhouse-gas concentrations, more frequent El-Nino-like conditions and stronger cold events in the tropical Pacific Ocean.

TL;DR: ECHAM6, the sixth generation of the atmospheric general circulation model ECHAM, is described in this article, which represents the present climate as well as, or better than, its predecessor.