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BGC Working Group Meeting March 2006
Update on Coupled Runs with BGC in CCSM3
Keith Lindsay, Peter Thornton
& many, many others
BGC Working Group Meeting March 2006
Outline
• BGC Components being used
• Sequential Coupling & Progress
• Results
• What will be done next
• Discussion
BGC Working Group Meeting March 2006
Phytoplankton Groups
Fixed C/N/P, Variable Fe/C, Chl/C, Si/C
Diatoms (C, Chl, Fe, Si)
Diazotrophs (C, Chl, Fe)
Picoplankton /Coccolithophores (C, Chl, Fe, CaCO3)
Zooplankton (C)
Nutrients
Ammonium
Nitrate
Phosphate
Silicate
Iron
Dissolved Organic Material (C, N, P, Fe)
Sinking Particulate Material (C, (N, P), Fe, Si, CaCO3, Dust)
ECO-C3 Marine Ecosystem Component
BGC Working Group Meeting March 2006
CLM3.CN: Summary Model Structure and Fluxes
Leaf
FineRoot
DeadStem
DeadCoarse Root
LiveStem
LiveCoarse Root
PreviousStorage
CurrentStorage
Wood Litter(CWD)
Litter 1(Labile)
Litter 2(Cellulose)
Litter 3(Lignin)
SOM 1(fast)
SOM 2(medium)
SOM 3(slow)
PlantPools
LitterPools
Soil OrganicMatter Pools
BGC Working Group Meeting March 2006
Outline
• BGC Components being used
• Sequential Coupling & Progress
• Results
• What will be done next
• Discussion
BGC Working Group Meeting March 2006
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 land+ocean; 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)
BGC Working Group Meeting March 2006
Coupling and Spin-upCoupling and Spin-up
ocean BGC spin-upactive oceanO(103)y
land BGC spin-upactive land/atmclim. or coupled model SSTsO(102)y coupled physics
land/ocn BGC adjustment
CTracer=progCBGC=280CRad=280
CTracer=progCBGC=progCRad=280
CTracer=progCBGC=progCRad=prog
coupled physicsland/ocn/atm BGC adjustment
coupled physicsfully coupled carbon-climate
Control runSpin-up 0100 yr
Spin-up 1100 yr
BGC Working Group Meeting March 2006
Outline
• BGC Components being used
• Sequential Coupling & Progress
• Results
• What will be done next
• Discussion
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
Outline
• BGC Components being used
• Sequential Coupling & Progress
• Results
• What will be done next
• Discussion
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
BGC Working Group Meeting March 2006
Outline
• BGC Components being used
• Sequential Coupling & Progress
• Results
• What will be done next
• Discussion
