Energy budget

When overwriting U, V and θvd the top level energy budget for Snr (left) and Jnr (right) looks like

energy budget for Snr energy budget for Jnr

The gradient of fluxes_into_atm_o_p for Jnr is -9.26*1014 = 1.82 W/m2.

Overwrite moisture

Overwrite U, V, θvd and moisture fields. Energy budget for Jnr for u-bj168

One order of magntidue worse

Add in Richard & Colin's tunnings

Add in Richard and Colin's tunnings, move from UM11.3 to UM11.4 and overwriting unfrozen and frozen soil moisture fraction.

Energy budget for Jnr for u-bl370

Slightly worse again.