Incorrect time-series output in file tracer.stat when key_iomput is undefined

[smueller]

Context

The file tracer.stat produced by a standard ORCA2_ICE_PISCES run with undefined key_iomput differs from that produced by a corresponding run with defined key_iomput. Further, SETTE reports the failure of the ORCA2_ICE_PISCES restartability test if key_iomput is undefined (e.g., in SETTE with environment variables SETTE_XIOS and SETTE_MPMD set to "no") due to differences in the output file tracer.stat.

Analysis

When time-series output into file tracer.stat is active, local variable ll_trcstat in source:/NEMO/releases/r4.0/r4.0-HEAD/src/TOP/trcstp.F90​ is set to .TRUE. during timesteps which compute and output tracer.stat time-series values. In the ORCA2_ICE_PISCES configuration of the model, variable areatot, which is used in the time-series computation, varies in time. Without key_iomput, however, areatot is not updated during all timesteps in which ln_trcstat is set to .TRUE., which leads to the computation of incorrect time-series values. In contrast, if key_iomput is defined and the output of at least one of a set of specific PISCES diagnostic variables (pno3tot, ppo4tot, psiltot, palktot, and pfertot) is enabled, areatot is updated during all timesteps and the tracer.stat time series is correctly computed.

Fix

Line source:/NEMO/releases/r4.0/r4.0-HEAD/src/TOP/trcstp.F90:#L81​ could be brought into line with the corresponding trunk version (source:/NEMO/trunk/src/TOP/trcstp.F90@13286:#L83​) by substituting ll_trcstat for ln_ctl in order to ensure the correct computation of the tracer.stat time-series values.

[smueller]

In 13323:

Error: Failed to load processor CommitTicketReference

No macro or processor named 'CommitTicketReference' found

[smueller]

source:/NEMO/releases/r4.0/r4.0-HEAD@13323​ has passed the standard SETTE tests.