Developments in the MPI‐M Earth System Model version 1.2 (MPI‐ESM1.2) and Its Response to Increasing CO2
By T. Mauritsen, J. Bader, T. Becker, J. Behrens, M. Bittner, R. Brokopf, V. Brovkin, M. Claussen, T. Crueger, M. Esch and 59 more. Journal of Advances in Modeling Earth Systems, 2019
1,043 citations recorded by the source corpus.
A new release of the Max Planck Institute for Meteorology Earth System Model version 1.2 (MPI‐ESM1.2) is presented. The development focused on correcting errors in and improving the physical processes representation, as well as improving the computational performance, versatility, and overall user friendliness. In addition to new radiation and aerosol parameterizations of the atmosphere, several relatively large, but partly compensating, coding errors in the model's cloud, convection, and turbulence parameterizations were corrected. The representation of land processes was refined by introducing a multilayer soil hydrology scheme, extending the land biogeochemistry to include the nitrogen cycle, replacing the soil and litter decomposition model and improving the representation of wildfires. The ocean biogeochemistry now represents cyanobacteria prognostically in order to capture the response of nitrogen fixation to changing climate conditions and further includes improved detritus settling and numerous other refinements. As something new, in addition to limiting drift and minimizing certain biases, the instrumental record warming was explicitly taken into account during the tuning process. To this end, a very high climate sensitivity of around 7 K caused by low‐level clouds in the tropics as found in an intermediate model version was addressed, as it was not deemed possible to match observed warming otherwise. As a result, 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.
Subfields: Atmospheric Science, Global and Planetary Change
View Paper: https://www.semanticscholar.org/paper/6c744783e64c2521aa38782002bbc49ecdfd7ba9
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Citations in the corpus
- The Max Planck Institute Grand Ensemble: Enabling the Exploration of Climate System Variability (2019, neutral): “2 (Mauritsen et al., 2019), which is used in CMIP6.”
- Perspectives on the Future of Land Surface Models and the Challenges of Representing Complex Terrestrial Systems (2020, background): “To allow for operation across a multitude of scales, most modern land surface models, for example, SURFEX (Masson et al., 2013), JULES (Burton et al., 2019); CLM5 (Lawrence et al., 2019); CABLE (Haverd et al., 2018), ORCHIDEE, (Naudts et al., 2014), and JSBACH (Mauritsen et al., 2019), operate using”
- Reduced global warming from CMIP6 projections when weighting models by performance and independence (2020, background): “Information about the models can be found in their reference publications (Mauritsen et al., 2019; Gutjahr et al., 2019; Semmler et al., 2019; Yang et al., 2020; Chen et al., 2019; Yukimoto et al., 2019) and on the ES-DOC explorer, which provides detailed information about all of the models used in…”
- Simulations for CMIP6 With the AWI Climate Model AWI‐CM‐1‐1 (2020, result): “This is similar to the average over the CMIP5 models (IPCC, 2014) and slightly larger than for the CMIP6 version of MPI‐ESM (3.0°C; Mauritsen et al., 2019; Müller et al., 2018; Tokarska et al., 2020).”
- Presentation and Evaluation of the IPSL‐CM6A‐LR Climate Model (2020, background): “There is increasing awareness however that these quantities are not intrinsic properties to the climate system (or to a given climate model) but may depend on the climate state (Mauritsen et al., 2019; Rugenstein et al., 2020).”