Redundant code

This page is a starting point for discussion on code which is not being used and can be considered for removal. At this stage no decisions about any of these pieces of code have been made but in time it will become a place to record when things are planned to be deleted and then when they are deleted.

Table of code proposed for deletion

Status should be "proposed" until agreed for deletion at a code management group meeting. However, you are encouraged to open a ticket with the milestone set to 'HOPEFULLY' as soon as you propose something here. If the proposal is rejected the ticket can be closed. Code that exists but it no longer used can be set to depreciated.

NOTE: ALL GLOMAP CHANGES SHOULD BE DISCUSSED WITH LEEDS BEFORE PROCEEDING

#	Description	Ticket	Remarks	Status	Timeframe	Owner
1	Old emissions code (that which uses ancil files)	UM:#142	None	Complete		Nick Savage
2	Old dry deposition scheme	UM:#2356	None	PROPOSED	Medium-term	Nick Savage
3	ukca_volume_mode.F90 quick method for calculating wet volume is not used.	UM:#2373	iwvolmethod removed.	Complete		Alan J Hewitt
4	ukca_strat_update.F90 - relax_ozone	UM:#1505	None	PROPOSED	Medium-term	Luke Abraham
5	Backward Euler Standard Tropospheric Chemistry	UM:#1507	None	PROPOSED	Medium-term	Fiona O'Connor
6	Wet oxidation of SO2 in GLOMAP	None	None	PROPOSED	Medium-term	Colin Johnson
7	Retire l_conv_tke (Updraft velocity) Introduced at UM:#1645	UM:#3668	Approval being sought for GA series (likely GA8) GA7.0 GMED:#197 and GA7.1 GMED:#286 Ticket passed to Ian Boutle	PROPOSED	Medium-term	Ian Boutle
8	All backward Euler chemistry schemes	None	Note that this is only for the “hard-coded” BE schemes. Quite a lot of work would be involved, but good as a longer-term aim. Note that problems for AQUM would need to be addressed first.	PROPOSED	Long-term	Luke Abraham
9	Deprecated UKCA netcdf attribute options	UM:#2513	'emission_type', string type attributes no longer recommeneded. Need some time for most new code to adopt these. Still used in AQUM rose stem files - will be removed in UM:#3985.	DEPRECATED	Long-term	Nick Savage
10	ASAD families chemistry	None	Families chemistry has not been used for many years (since at least UM6.1). It is likely that it no longer works if turned on, and it complicates the code making other developments harder	DEPRECATED	Short-term	Luke Abraham
11	Dry deposition 9 PFT option	UM:#4259	The 13 PFT option has been adopted for UKESM1. The 9 PFT option is possibly not being used at all. Proposed in June 2018.	PROPOSED	Long-term	Alan J Hewitt
12	Remove explicit C_SPECIES constants and calculate these from M_SPECIES and the mass of air	None	Will have wide-ranging rose-stem KGO breakages	PROPOSED	Short-term	Luke Abraham
13	Remove temporary logical l_fix_nacl_density Introduced at UM:#2405 by Colin Johnson	UM:#3490	Requires AMIP testing and a GMED ticket Could be accepted to GA9	PROPOSED	Medium-term	None
14	Remove temporary logical l_fix_nh4no3_equilibrium Introduced at UM:#646 by Carlos Ordonez	None	Requires AMIP testing and a GMED ticket Could be accepted to GA9	PROPOSED	Medium-term	None
15	Remove temporary logical l_fix_ukca_impscav Introduced at UM:#1421	UM:#4145	Approval being sought for GA series (likely GA9) GMED:#402	PROPOSED	Medium-term	Alan J Hewitt
16	Remove temporary logical l_fix_improve_drydep Introduced at UM:#1250	UM:#3997	Approval being sought for GA series (likely GA9) GMED:#393	PROPOSED	Medium-term	Alan J Hewitt
17	Remove temporary logical l_fix_ukca_h2dd_x Introduced at UM:#4157	UM:#4245	Approval being sought for GA series (likely GA9) GMED:#410	PROPOSED	Medium-term	Alan J Hewitt