Some of the terms in FlowDiagnostics are a part of the tracer variance equation, so maybe it would be good to create another module called TracerVarianceBudgetTerms and move of them there. Basically focus as much as possible on the equations the terms belong to and leave FlowDiagnostics only for things that really aren't part of a well-used equation (like PV, Ro, Ri etc.)
Some of the terms in
FlowDiagnosticsare a part of the tracer variance equation, so maybe it would be good to create another module calledTracerVarianceBudgetTermsand move of them there. Basically focus as much as possible on the equations the terms belong to and leaveFlowDiagnosticsonly for things that really aren't part of a well-used equation (like PV, Ro, Ri etc.)