[ecco-support] Extensive recomputations with bottom pressure cost function

[Emma Boland]

Hi ECCO team,

My colleague and I are interested in running adjoint sensitivity studies of bottom pressures in ECCOv4. We've added a custom cost function to ecco_phys.F (m_boxmean_bp) that is modelled on m_boxmean_eta, and is defined in terms of m_bp. Compiling with TAF gives lots of 'extensive recomputation' warnings for m_bp. When running, the forward part completes normally, generating a m_boxmean_bp file with values as expected, but the start of the adjoint component hangs for many hours before generating any sensitivities.

I expect that what is needed is some store statements to avoid the recomputations, but I'm not experienced enough to understand what they should look like and where they might be needed.

Any help or advice would be appreciated,

Thanks,

Emma

--
Dr Emma Boland | Physical Oceanographer | British Antarctic Survey
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emmomp at bas.ac.uk<mailto:emmomp at bas.ac.uk> | Phone: (0)1223 221276
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