bgc working group meeting march 2006 update on coupled runs with bgc in ccsm3 keith lindsay, peter...

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