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Anticipated Changes for CAM4 Part 1 - CESM

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Parameterizations that are maturing and ready <strong>for</strong><br />

group assessment!<br />

• Aerosol <strong>for</strong>mulation: (in collaboration with Chem/Climate WG)<br />

– merger of CGD & ACD bulk aerosol <strong>for</strong>mulation<br />

(these aerosols will be used <strong>for</strong> transient simulations with<br />

CCSM3.5)‏. This is an interim solution, pending successful<br />

integration of PNNL codes (Liu/Ghan hope <strong>for</strong> first<br />

implementation in 4-8 weeks)!<br />

– Complete the integration with new microphysics & Ghan<br />

droplet activation<br />

• Formal Assessment of UW PBL and Shallow convection schemes<br />

• Formal Assessment of Morrison/Gettelman microphysics<br />

• Formal Assessment of gravity wave and orographic wave<br />

breaking <strong>for</strong>mulations<br />

• Formal Assessment of Hybrid Isentropic coordinates

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