Coupled atmosphere biosphere modelling TH, MW, JM, FIW

Coupled modelling  We have created a coupled model of the biosphere and lower atmosphere (CAB)  We have tested the biosphere model against surface flux data from eddy covariance towers in the BOREAS study – no model tuning against fluxes was undertaken.  We have tested the CAB model against surface flux and atmospheric profile data

Met. data Aircraft data, Stand data Biosphere model Model Compariso n Planetary Boundary Layer model Biosphere model Albedo, LE, Sens. heat, Ts, Evaporation, Transpiratio n NEP Model Compariso n Flux data (i) Off-line biosphere model (ii) CAB model Wind speed, Air temp., PAR, Precipitatio n, VPD, CO 2 conc. Respiration model

CAB Data SPA

Potential Temperature Moisture content [CO 2 ]

Current work & next steps  Bayesian inversion studies to infer land surface exchanges from e.g. atmospheric profile data (now online from UoE aircraft, see next slide)  Sensitivity analyses on atmosphere-biosphere coupling and feedbacks  Using tall tower data to infer regional C sink strength

Atmos. pressure