Update on Coupled Runs with BGC in CCSM3

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Update on Coupled Runs with BGC in CCSM3

• Keith Lindsay, Peter Thornton
• many, many others

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Outline

• BGC Components being used
• Sequential Coupling Progress
• Results
• What will be done next
• Discussion

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ECO-C3 Marine Ecosystem Component
Zooplankton (C)
Dissolved Organic Material
(C, N, P, Fe)
Sinking Particulate Material (C, (N, P),
Fe, Si, CaCO3, Dust)
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CLM3.CN Summary Model Structure and Fluxes
Leaf
Live Stem
Live Coarse Root
Current Storage
Plant Pools
Fine Root
Dead Stem
Dead Coarse Root
Previous Storage
Wood Litter (CWD)
Litter Pools
Litter 1 (Labile)
Litter 2 (Cellulose)
Litter 3 (Lignin)
SOM 1 (fast)
SOM 2 (medium)
SOM 3 (slow)
Soil Organic Matter Pools
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Outline

• BGC Components being used
• Sequential Coupling Progress
• Results
• What will be done next
• Discussion

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Spin-up Strategy

• Reminder Carbon inventory adjusts to climate
• Spin-up Goal find C distribution in eqm with the
  model climate
• Three flavors of CO2
• Tracers CO2 in atm CO2-tracer
  (x,y,z,t)
• (diagnostic of surface fluxes)
• 3 inert tracers net landocean net land net
  ocean
• Biogeochemistry CO2
  CO2-tracer (x,y,sfc,t)
• To drive fluxes into ocean
• Sensed by terrestrial photosynthesis
• Radiative CO2
  CO2-tracer (x,y,column,t)

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Coupling and Spin-up
CTracerprog CBGC280 CRad280
CTracerprog CBGCprog CRad280
CTracerprog CBGCprog CRadprog
land BGC spin-up active land/atm clim. or coupled
model SSTs O(102)y
coupled physics land/ocn BGC adjustment
coupled physics land/ocn/atm BGC adjustment
coupled physics fully coupled carbon-climate
ocean BGC spin-up active ocean O(103)y
Control run
Spin-up 0 100 yr
Spin-up 1 100 yr
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Outline

• BGC Components being used
• Sequential Coupling Progress
• Results
• What will be done next
• Discussion

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Outline

• BGC Components being used
• Sequential Coupling Progress
• Results
• What will be done next
• Discussion

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Outline

• BGC Components being used
• Sequential Coupling Progress
• Results
• What will be done next
• Discussion