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The Arctic: An AGU Joint Special Collection

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Last updated:
13 December 2017
The Arctic has become the focus of many new investigations and studies across a number of disciplines. In many cases, this research is integrating diverse new data sets, observations, and modeling, and making connections among and across the biosphere, oceans, atmospheres, space, and geophysical environments. These papers include historical and new research on the Arctic and represent the following AGU journals: Earth’s Future, Earth and Space Science, Geochemistry Geophysics Geosystems (G-Cubed), Geophysical Research Letters, Global Biogeochemical Cycles, JAMES (Journal of Advances in Modeling Earth Systems), JGR: Oceans, JGR: Atmospheres, JGR: Solid Earth, JGR: Space Physics, JGR: Biogeosciences, JGR: Earth’s Surface, Reviews of Geophysics, Space Weather, and Water Resources Research.

Geophysical Fluid Dynamics Laboratory CMIP6 Models

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Last updated:
5 December 2017
The Geophysical Fluid Dynamics Laboratory of NOAA has developed a new set of component models: Atmospheric Dynamics and Physics, Atmospheric Chemistry, Ocean Dynamics and Physics, Ocean Biochemistry, Land Hydrology, Land Vegetation and Carbon Cycling, Sea ice) that have been combined into two new climate models, a physical climate model CM4.0 and and Earth System Model with a closed carbon cycle, ESM4.4.  Both models predict aerosols from emissions and model aerosol indirect effects.  CM4.0 and ESM4.0 incorporate versions of a new atmospheric model AM4, based on the FV3 dynamical core, a key feature of which is a new convective parameterization, with the ESM4 version having more stratospheric resolution and a more complete tropospheric and stratospheric chemical mechanism.  Both models incorporate versions of the ocean model OM4, based on the new MOM6 code, with CM4 using 1/4 degree resolution and ESM4 1/2 degree.  ESM4 also incorporates a more complete ocean biogeochemistry package and a new Land Model LM4.1, with a distinctive dynamic vegetation module.. The present collection documents the features of all of these model components, focusing on new and distinctive features, describes the performance of the model in simulating the present climate, including  natural variability, and describes the response of the model to idealized and historical forcings as recommended for the "DECK" experiments in CMIP6.  We make an effort to describe persistent model deficiencies and the rationale for our tuning procedures.

The Max Planck Institute for Meteorology Earth System Model version 1.2

Last updated:
6 June 2017
The Max Planck Institute for Meteorology has a thirty year history of developing state-of-the-art climate models and MPI-ESM1.2 is the latest iteration. The model includes improvements to the carbon-cycle, an innovative aerosol climatology and the atmospheric physics, and for the first time, we elaborate on an explicit strategy to tune the models climate sensitivity to improve the match to observed warming. The relatively low computational cost of the model has allowed us to perform a 100-member ensemble of the historical experiment, permitting us to compare the model to observations in innovative ways and sparking new research previously not possible.

The Max Planck Institute for Meteorology Earth System Model

1 December 2013
B. Stevens
This special section is devoted to the scientific description of the MPI-ESM, the Earth System Model developed by the Max Planck Institute for Meteorology. The MPI has a long history of developing high-quality coupled models. This newest generation of our coupled model is the first to systematically incorporate the carbon cycle and represent dynamic vegetation, but equally important is its improved representation of basic physical processes. The papers in this section present a description of the MPI-ESM, and an initial evaluation---including the development of several novel configurations and features.