1. CM2.0 : 3 historical runs
1 each AR4 scenarios
CM2.1: 5 historical runs
+ 10 A1B’s from
( degree time slices)

2. Annual Mean SST
CM2.0
CM2.1U
CM2.0-Reynolds
CM2.1U-Reynolds

3. Some collaborative efforts:
Climate process teams
2 oceanic: overflows; mesoscale eddy param.
1 atmospheric: low latitude cloud feedbacks
-- diagnostics/observations
-- new column physics
-- idealized dynamical
studies

4. Radiative transfer intercomparison for IPCC
Common source code management/development
of finite-volume dynamical core
( meeting in November at GFDL of all US
users of fv core)

5. “Back-burner” projects:
BAMS paper describing “convergence”
of climate sensitivities
Water vapor/cloud feedback analysis
Explaining why polar lower stratospheric
temperature biases are so different

6. Do we need new, more attractive, project(s)?
Suggestion:
focus on regional climate changes
for which predictions of two models are
profoundly different
Example: Sahel rainfall

7. 10 member ensemble with fixes SSTs

9. Sahel rain: (1980-2000) minus (1960-1940) (mm/month)
8 member
ensemble

10. (Normalized)

11. Cess +2K annual mean precip