id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
241	Updated 4DVar surface forcing adjustment	arango	arango	"The 4DVar adjustment of surface forcing ('''ADJUST_WSTRESS''' and '''ADJUST_STFLUX''') was revisited in view of the new '''IS4DVAR''' algorithm with preconditioning.  To avoid confussion, the surface fluxes in output tangent linead and adjoint NetCDF files are written as kinematic fluxes (m2/s2 for stress and Celsius m/s heat flux).  However, the same variables associated with the nonlinear model are scaled to Pa and W/m2, respectively.

Additional logic is added when the surface forcing is computed using the '''BULK_FLUXES''' option. In this case, the fields are convolved since the minimization is done in v-space.

The bacground cost function term ('''Jb''') was corrected to add contributions from all previous outer loops.

Many thanks to Andy Moore for looking and testing this option in the new '''IS4DVAR''' algorithm."	defect	new	major	Adjoint Based Algorithms	Adjoint	3.2