¡
¡
¡
¡
„0
„2
„1
„3
x2
x1
x3
x0
Adjoint
Transport
Forward
Transport
Forward
Transport
Measurement
Sampling
Measurement
Sampling
ÒTrueÓ
Fluxes
Estimated
Fluxes
Modeled
Concentrations
ÒTrueÓ
Concentrations
Modeled
Measurements
ÒTrueÓ
Measurements
Assumed
Measurement
Errors
Weighted
Measurement
Residuals
D/(Error)2
Adjoint
Fluxes
= „
Flux
Update
4-D Var
Iterative Optimization Procedure
Minimum of cost function
J
