Minutes of the code management group meeting 2018-06-19

Code management group minutes

Teleconference Details

Tuesday 19th June 2018, 10am - 12noon BST

• UK Landline: +44 (0)1223 761376 (x61376from an internal University of Cambridge phone)
• Participant PIN: 154070

Present

Met Office:

Cambridge:

Leeds:

Reading:

Lancaster:

Edinburgh:

UEA:

NIWA:

CSIRO:

Apologies:

Not present:

Actions from this meeting

Standing actions

1. (ongoing - standing item) CMG to monitor list of bugs and circulate between group for owners.
2. (ongoing - standing item) At CMG future meetings there should be included an appendix listing the open bugs. If a ticket is included it is not an open bug (as the owner of ticket is person doing lodging).
3. (ongoing - standing item) ALL with access to keep monitoring ukca_bugs email list.
4. (ongoing - standing item) ALL to think about if code changes will change KGO and let systems team know in good time, and remember to include the UKCA & SC0138 keywords to all UKCA tickets. This should be a standard part of our working practice. Note also the required keywords.
5. (ongoing - standing item) ALL to note, review, and remove obsolete/redundant code
6. (ongoing - standing item) ALL closed ticket owners to produce a summary of their change for the UKCA newsletter
7. (ongoing - standing item) Code Owner to produce draft newsletter for CMG to approve.

Minutes

Actions from the Last Meeting (LA)

Minutes of the code management group meeting 2018-04-17

One-off actions

1. (new) MY to check GLOMAP-mode code and report any missing bug fixes on the bugfixes page.
2. (new) LA to liaise with MY.
3. (ongoing) LA to migrate PUMA UM tickets to MOSRS - see table below.
4. (ongoing) LA to open tickets for all changes that still require a ticket.
5. (ongoing) FOC to recommend at next Exec meeting a policy of allowing only CMG to (certify and) distribute any UKCA configurations for science purpose.
6. (new) AH to look into how to re-organise the UKCA panel and send draft design to CMG by 15th May 2018 #3970 - Done
7. (new) LA to forward email from Systems Team to AH - Done
8. (new) ALL to feedback to AH ahead of next CMG (by 5th June 2018)
9. (ongoing) MD to collate all UKCA parameters into ukca_constants in advance of removing duplicates already available in the UM and circulate details.
10. (ongoing) AH to scope out reducing repetition of mode definitions in GLOMAP.
11. (ongoing) LA and MD to talk offline about releases.
12. (ongoing) MD to correct column-call rose-stem tests when pressure-level age-of-air diagnostic bugfix is lodged.
13. (ongoing) MD/LA to set up free-running and nudged GA7.1+StratTrop TS2000ish timeslice, with instructions to make it transient.
14. (ongoing) LA to create Wiki page on UKCA website for users to add details of configurations and input files.
15. (new) FOC to update comments on bug #74 (um:#1283)
16. (new) LA to update bugfixes table.
17. (new) ALL to review output from vn11.0 release candidate(s).
18. (new) JM to discuss vn11.0 with Matt Woodhouse at his upcoming visit to the Met Office.
19. (new) MG to progress ticket um:#3909 after doing further tests.

Standing actions

1. (ongoing - standing item) CMG to monitor list of bugs and circulate between group for owners.
2. (ongoing - standing item) At CMG future meetings there should be included an appendix listing the open bugs. If a ticket is included it is not an open bug (as the owner of ticket is person doing lodging).
3. (ongoing - standing item) ALL with access to keep monitoring ukca_bugs email list.
4. (ongoing - standing item) ALL to think about if code changes will change KGO and let systems team know in good time, and remember to include the UKCA & SC0138 keywords to all UKCA tickets. This should be a standard part of our working practice. Note also the required keywords.
5. (ongoing - standing item) ALL to note, review, and remove obsolete/redundant code
6. (ongoing - standing item) ALL closed ticket owners to produce a summary of their change for the UKCA newsletter
7. (ongoing - standing item) Code Owner to produce draft newsletter for CMG to approve.

Bugs/Bugfixes (LA)

Open Bugs

#	Description	Ticket	Owner	Status/ Updates	Comments from previous meeting	Comments from this meeting
35	Error in labelling: Surface resistance <--> stomatal resistance ?	MOSRS #1409	Fiona O'Connor		Leave open. Garry Hayman started work in offline JULES
72	UKCA Dry Deposition: Surface resistance values not set for some species	#1250	AlanJHewitt	Lodged #1250 with no KGO Temporary logical to be removed in #3997 AH will need to update UKCA rose stem tests This bug can be closed.	Leave open.
74	Bug in ukca_tropopause with definition of PV tropopause	#1283	Fiona O'Connor		FOC to update comments. Scope has been extend.
75	Bug in STE fluxes	#1367	Fiona O'Connor		Leave open. Still not sure if ENDGame related or not.
87	Possible issues with YSTORE in UKCA_CHEMISTRY_CTL.	UM#3245	Colin Johnson/ Luke Abraham		leave open.
94	Data corruption in Age-of-Air (and possibly Passive O3) diagnostic on pressure levels	UM#3718	Mohit Dalvi		To be lodged at vn11.1. See um:#3718.
96	Output drydiam diagnostics where l_ukca_arg_act but not l_ukca_radaer	UM#3962	Unknown	The beginnings of a solution are found in vn11.0_ukca_drydiam_activate_wo_radaer.

Redundant Code (LA)

Code for deletion

#	Description	Ticket	Remarks	Status	Timeframe	Owner	Comments from this meeting
2	Old dry deposition scheme	#2356	None	PROPOSED	Medium-term	Nick Savage
4	ukca_strat_update.F90 - relax_ozone	#1505	None	PROPOSED	Medium-term	Luke Abraham
5	Backward Euler Standard Tropospheric Chemistry	#1507	None	PROPOSED	Medium-term	Fiona O'Connor
6	Wet oxidation of SO2 in GLOMAP	None	None	PROPOSED	Medium-term	Colin Johnson
7	Updraft velocity	#3668	Proposed in December 2017	PROPOSED	Medium-term	Alan J Hewitt
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	#2513	'emission_type', string type attributes no longer recommeneded. Need some time for most new code to adopt these. Still used in AQUM files.	DEPRECATED	Medium-term	Nick Savage	AQUM are addressing the files.
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	None	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

Targets for vn11.2 (and beyond) (LA)

PLEASE REMEMBER TO INCLUDE THE KEYWORDS: UKCA & SC0138

Tickets targeting vn11.2

#	Description
#2689	Enable coupling of GLOMAP-MODE Aerosol to FAST-JX photolysis.
#3127	Investigate KGO differences in um_n48_ukca_eg app using GNU on the Cray
#3292	Consolidate constant variables used by UKCA
#3769	Time updating for glomap climatology
#3959	RO2-Permutation Chemistry
#3962	Output dry diameter diagnostic in niche case where l_ukca_arg_act but not l_ukca_radaer
#3970	Tidy the UKCA gui panel
#4001	Magic numbers in ukca_setup_chem_mod.F90
#4020	Improved calculation of ozone dry deposition to ocean - surface resistance term
#4024	Triggering of i_ukca_dms_flux by l_sulpc_so2
#4032	Addition of new diagnostics for the wet and dry deposition flux of oxidised nitrogen

Tickets targeting vn11.3

#	Description
#3997	Retire temporary logical l_fix_improve_drydep

UKCA Rose panel (AH)

Please see um:#3970 and the code branch r54617_BoBoB_tidy_ukca_gui_panel.

Source/sector information for UKCA emissions (MD)

Please see: Design_UKCA_emiss_sectorwise_v1_4Jun2018.pdf

A Separate UKCA Code Repository

Please see this document for the UMPB on the 4th June, and the subsequent minutes. The action on LA from the UMPB was:

• UMPB Action: LA - as a next step, set up a meeting with interested parties in the UM system team to discuss details after the release