Status of v1 Campaign

Each model version is used in a simulation campaign consisting of major simulations to address the science questions of science drivers in the water cycle, biogeochemistry, and the cryosphere system.

COMPLETED - Water Cycle v1 DECK Simulations

The water cycle DECK simulation campaign for CMIP6 was completed with E3SM v1 lower resolution (100 km atmosphere/land, 60-30 km equator-pole ocean/sea-ice).

The runs started on Jan 30, 2018 and were completed on Apr 4, 2018. The 1770 simulated years were completed in 64 days; average aggregate throughput of 27.7 SYPD.

An overview of the CMIP6 experimental design is available in Eyring at al. (2016, GMD).  The “entry card” simulations for CMIP6 consist of the DECK and historical simulations as listed in the table below extract from Table 2 of Eyring et al (2016).

DECK Water cycle simulations for v1.

The first DECK simulation was the piControl simulation which required a minimum of 500 years. Other experiments were initialized by branching of from piControl at various stagesThe scenario is provided in the figure below. Historical_H11pctCO2, and abrupt-4xCO2 started from year 101 of piControlamip from year 1870 of historical_H1historical_H2 from year 151 of piControl and all remaining historical members were spaced 50 years apart (201, 251, 301).

COMPLETED - AMIP v1 Simulations

We had completed 3-member ensembles of AMIP DECK simulations.

In addition to those AIMP simulations we had performed AIMP 1850 all forcing simulations – same as DECK but keeping all forcing agents at their 1850 values (to compute the time-varying total effective radiative forcing (ERF) between 1870 and 2014) and AIMP 1850 aerosol forcing simulations – same as amip but keeping aerosol related forcing agents at their 1850 values (to compute time evolving total aerosol-cloud forcing (ERFari+aci))

COMPLETED - Cryosphere Simulations

  • Ocean-sea-ice only simulations have been conducted for several decades at both low and high resolution (~30 and ~10 km near Antarctic ice shelves, respectively), including heat and freshwater fluxes between the ocean and ice shelves, in order to demonstrate the importance of high spatial resolution on accurate simulation of sub-ice shelf melt rates.
  • One set of low-resolution pre-industrial (1850) fully coupled simulations have been conducted for about 75 years, both with and without heat and freshwater fluxes between the ice shelves and oceans, in order to better understand the broader impacts of explicitly resolved ice shelf melt fluxes on Southern Ocean high-latitude water mass transformation and regional and global ocean circulation.
  • Low-resolution simulations with improved liquid and solid Antarctic ice sheet fluxes to the ocean (explicit sub-ice shelf melting and data iceberg climatology) have been conducted for about 100 years to study the importance of improved treatments compared to more approximate treatments.

Undergoing Simulations

High-resolution (25 km atmosphere and land, 16-8 km equator-pole ocean and sea ice) coupled water cycle simulations have now completed 30 years.

Simulations Starting Soon - BGC Campaign

The biogeochemical (BGC) simulations make use of the lower resolution configuration (100 km atmosphere/land, 60-30 km equator-pole ocean/sea-ice). The campaign will exercise two different land soil BGC approaches, the Convergent Tropic Cascade (CTC) and the Equilibrium Chemistry Approximation (ECA) configurations, and the simulation campaign will characterize the impacts of the structural uncertainties associated with these different approaches on the model’s coupled carbon-climate feedbacks.

Starting from a spun-up physical state, the representations of biogeochemical processes in land and ocean have been turned on, and the coupled model has been spun up to produce consistent initial conditions for the physical state and nutrient pools.

Additional simulations are planned to characterize the effect off turning of phosphorus limitation (CTC-CN), and to exercise the model in an emission-forced prognostic CO2 mode (EF).

Production coupled BGC simulations will begin in the near future (Nov-Dec 2018).

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