This is a collaborative project between the ICCP and the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) in Germany. Utilizing the AWI-CM3 earth system model and a novel iterative modeling protocol, global km-scale greenhouse warming simulations are conducted. We have completed 5 time-slice simulations from the present to future with 9 km for atmosphere and 4-25 km for ocean resolutions. 9 km time-slice simulations are the highest resolving coupled simulations extending to the year 2099 which offer a more accurate representation of future climate conditions, enabling better planning for climate adaptation.
The AWI-CM3 (Streffing et al., 2022) is employed to perform fully coupled (atmosphere, ocean, land, sea ice, river runoff) global climate simulations. The atmospheric component is configured with about 9 km horizontal resolution and 137 vertical layers. The horizontal and vertical resolutions of the ocean component is 4~25 km and 81 levels, respectively.
A total of five time-slice experiments were conducted including one with the constant forcing:
- Control (1950-1969) simulation with constant1950 greenhouse gas and aerosol forcing
- 2000s (2000-2012) simulation with historical forcing
- 2030s (2030-2039) simulation with SSP5-8.5 forcing
- 2060s (2060-2069) simulation with SSP5-8.5 forcing
- 2090s (2090-2099) simulation with SSP5-8.5 forcing
Time slice simulations were branched off from AWI-CM3 – 31 km atmosphere and 4-25 km ocean resolution.
Data output frequency is 3hr, daily, and monthly for the atmosphere, 6hr, daily, and monthly for the ocean. The data amount produced by the model is about 12.5 TB/simulation year.
Resolution of AWI-CM3 with 9 km:
- ATM_GRID (TCo1279) = (NX_ATM=5136, NY_ATM=2560)
- OCN_GRID = (NX_OCN=3600, NX_OCN=1800)