Controlling UKCA tracers from vn9.0
From UKCA
Up to and including UM version 8.6, tracers were controlled by setting values in a 150 element array tc_ukca in the SIZES file. The UMUI set this up for existing chemistry schemes but for new chemistry schemes or if you wish to add/remove tracers from an existing scheme, a hand edit is needed. With the introduction of Rose, it was no longer possible to generate the tc_ukca in the GUI and a different approach was needed. This page explains the new approach.