Minutes of the code management group meeting 2016-09-23

Code management group minutes

Present

Met Office: Cambridge: Leeds: Reading:

Apologies:

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) JM to continue to link/send powerpoint results (re: GA7.0/GA7.1), as new configurations released and link/put files on UKCA wiki.
4. (ongoing - standing item) ALL with access to keep monitoring ukca_bugs email list.
5. (ongoing - standing item) ALL to think about if code changes will change KGO and let systems team know in good time. This should be a standard part of our working practice.

Teleconference Numbers

• UK Freefone:0800 9171956
• Participant passcode: 89264837 then #

Agenda

1. Agree agenda
2. Actions from the last meeting (2016-07-22) including standing items
3. UMvn10.5 code freeze
4. Targets for UMvn10.6 code freeze
5. Rose suites at UMvn10.4/10.5
6. Progress towards GA7.1
7. Bugs/bugfixes
8. Update on GungoHo!/LFRic
9. AOB/DNM
10. Date of next meeting

Minutes

Actions from 2016-07-22

Standing items:

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) JM to continue to link/send powerpoint results (re: GA7.0), as new configurations released and link/put files on UKCA wiki.
4. (ongoing - standing item) ALL with access to keep monitoring ukca_bugs email list.
5. (ongoing - standing item) ALL to think about if code changes will change KGO and let systems team know in good time. This should be a standard part of our working practice.

UMvn10.5 code freeze

Major UKCA changes at this version

1. Diagnostics for plume scavenging - all diagnostics now available for Aerosol budget calculations.
2. Section 54 created for GLOMAP-climatological fields + functionality to initialise fields from NetCDF files during Reconf
3. Fix issues with aerosol surface area for PSC chemistry
4. STASH Time codes for UKCA now available
5. Namelist factor for scaling the lightning NOx emissions
6. Minor optimisation - Cache blocking for aerosols
7. UKCA ND, EG_OFFLINE apps now removed from Rose-stem tests
8. Improvements to TKE diagnostic, including fix to level-mismatch
9. Update UKCA dry deposition to work with new surface tiles
10. BC refractive index update
11. UKCA general refactoring/ tidy-up before tracer number increase

Targets for UMvn10.6 code freeze

1. Fix for plume-scavenging tracer indexing issue
2. Generation of aerosol as well as chemistry diagnostics for CMIP6
3. Activating Water vapour feedback from UKCA (involves moving location of UKCA call)
4. Increase number of UKCA tracers (current branch/ implementation allows upto 255, after which it clashes with LBC 'tendancy' tracers)
5. UKCA StratTrop NRUN-CRUN bit-reproducibility issue - inputs to solver are being checked first, followed by solver issues themselves
6. Reduce vertical extent of Dry deposition calculations - will be lodged on a switch and subsequently evaluated for GA/UKESM
7. Columnar approach/ OpenMP in GLOMAP: Current method hardwired to lat/long decomposition, Optimisation team have asked for more flexibility

GA6/7 UKCA (Strat+Trop) Rose suites at UMvn10.3,4,5

UM version	Suite-id	Remarks
10.3	u-ac253	Not ported to MONSooN
10.4	u-ac782 (MO), u-ad048(MONSooN), puma-aa342(MONSooN)	Assessment run -puma-aa342 (data on MASS)
10.5	u-ae771 (MO)	Developing

Progress towards GA7.1

Major focus on reconciling ERF due to GLOMAP-aerosols. Tunings carried out to BC/RADAER, cloud scheme, DMS emissions. Fixes to BC and Volc_SO2 emissions. Need to freeze configuration by end of August.

Bugfixes

Open Bugs

#	Description	Ticket	Owner	Status/ Updates
31	FP exceptions in asad_sparse_vars or asad_spimjmp	#368 (MOSRS)	Nick Savage
35	Error in labelling: Surface resistance <--> stomatal resistance ?	MOSRS #1409	Fiona O'Connor
38	Missing logical for volcanic so2 emissions.	MOSRS #1350	Graham Mann	Mohit will lodge branch with logical at UM10.5
50	ukca_solve_coagnucl failures	#319 (MOSRS)	Mohit Dalvi/Graham Mann?	Not encountered any more ?
57	Incorrect logic for DMS anciliaries required	#756 (MOSRS)	Nick Savage
58	Fastj-X runs on patches all in dark	#1360 (MOSRS)	Nick Savage
68	HO2 heterogeneous loss rate 1st order(?)	No ticket	Nick Savage
72	UKCA Dry Deposition: Surface resistance values not set for some species	#1250	Alan Hewitt?
74	Bug in ukca_tropopause with definition of PV tropopause	#1283	Steven Hardiman	Change ownership?
75	Bug in STE fluxes	#1367	Fiona O'Connor
80	H2O feedback broken under ENDGAME	UM#1646	Colin Johnson
81	Runs with segment/ restart interval < 5 days fail due to NetCDF emiss update bug	UM#948	Alistair Sellar/ Mohit Dalvi
83	error in the indexing of the tot_tracer array in the convective plume scavenging	UM#2036	Nick Savage
84	NetCDF error when using UKCA and Nudging: Model fails with 'EM_GET_VAR_INFO: Time dimension info not found, check if l_ignore_time = .TRUE.'	UM#2095	Mohit Dalvi

Update on GungHo!/LFRic

Met Office internal secondment advertised and person selected. Work has commenced with an Idealised ENDGame suite and simple tracer tests are being implemented with specified winds. After initial assessment and availability of Gung-Ho based suites, implementation and assessment will be repeated. Status/ Documentation at: http://collab.metoffice.gov.uk/twiki/bin/view/Project/UkcaGungHo

AOB

Based on experience with vn7.3 Nitrate configuration, FOC to recommend to Exec that any new UKCA configuration should only be distributed after specified (e.g. rose-stem) testing, assessment and followed by approval from CMG.

Also, once the GA7.1 configuration with offline oxidants is frozen, both FOC and JM propose that the interactive chemistry is activated and evaluated with a view to making that configuration a formal scientific release of UKCA. Actions noted above.