Indian Ocean SST switchon experiments

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Indian Ocean SSTswitch-on experiments
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Switch-on experiment
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Switch-on experiment
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Switch-on experiment
K
R
10m/sec
3m/sec
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Switch-on experiment
Temporal adjustment of temperature
d1
d5
d8
d15
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Switch-on experiment
T (K)
q (g/Kg)
P (mm/day)
gt T
q?.v
gt ? , T
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Switch-on experiment
T (K)
q (g/Kg)
P (mm/day)
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Switch-on experiment
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Switch-on experiment
Diabatic heating profile in equilibrium state
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Switch-on experiment
(vq)
prc
vq
vq
Shading in upper left panel is the vertically
integrated moisture
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Switch-on experiment
Vertical heating profile
Adjustment of temperature
conv
d1
d5
d8
d15
stratus
lw rad
v_dif
SUM
K/sec
Kelvin
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Wave Dynamics Tgt0
M less CAPE reduced Convection
Intensified convection
qlt0
qgt0
Africa
Indian ocean
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Response to CO2 forcing with fixed SST
At least in the GFDL model, there is comptet
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Response to CO2 forcing with fixed SST

• At least in the AM2, there is a tug war between
  the direct radiative effect of CO2 and the
  surface SST warming.
• In AM2, SST wins in CAM3, CO2 wins.
• But in both model, the response to 2xCO2 seems to
  be robust.

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Simulated summer (Jul-Aug-Sept) Sahel rainfall by
NCAR CCSM3.0 (upper) and GFDL CM2 coupled climate
models driven by the estimated observation of
solar, greenhouse gas, aerosol and land use
forcing (1870-1999) plus A1B future scenario
forcing (2000-1099).
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Annual mean response to 2xCO2 and 2K uniform SST
warming
2xCO2
2K
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ANN response to 2xCO2 forcing, but fixed SST
ANN