OpenIFS tendencies output

HI, is the "tendency due to explicit dynamics" equal to "tendency due to advection" I encounter in my experiment data request?

Answer by F. Vana: By "tendency due to explicit dynamics" is meant the contribution of the transport scheme AND the right hand side (i.e. forcing) of the explicit dynamics. This means it contains more than just the advection. I am afraid we don't provide a separate term for the advection only.
Hence when you need to evaluate exclusively the advection tendency only, you need to modify the source code.

The T-tendency of gravity wave drag has a remark: bugged before Cycle 39R1. Could you explain what the nature of this bug is, and does it also apply to e.g. q-tendency and momentum tendencies due to gravity wave drag?

Answer by F. Vana: The T-tendency of gravity wave drag dissipation wave break was before CY39R1 accounting for the effects i) 3-D dissipation rate for stochastic physics and ii) temperature effect from non-orographic gravity wave drag scheme.
The latter was with the wrong sign. Since CY39R1 only the (ii) tendency is considered here with the correct sign.
The q-tendency (position 9) (similarly to fields in position 6-8) contains the tendency obtained by joint vertical diffusion orographic GWD processes and surface scheme solver.
The fields 10 and 11 for momentum variables contains exclusively the part of GWD scheme from the previously mentioned joint solver (so there is some duplication here with the tendencies 6 and 7) plus the contribution from non-orographic GWD scheme.