Bugfixes (new approach)

The aim of this page is to present the information on the new bug reporting system. All bugs should be reported to ukca_bugs@metoffice.gov.uk. More details of the approach to reporting and fixing bugs is contained in the document here .

Bug fixes table

This is a list of all reported bugs, with a link to tickets with more information on the issue and branches to fix it. Some of the bugs/ issues are described in more detail on an older bugfixes page. The UM versions listed are those where the bug is known to be present. Please note however, that bugs in versions before 8.2 are not reported here, although information on some of these can be found here.

#	Description	Ticket		Affected Versions/ Config	Branch with fix	Remarks	OPEN/CLOSED	Owner
		MetO	NCAS
1	Improper construction of filename for Background Aerosol data used for Fast-JX/ HetPSC	#4283	#439	8.2-8.3	MetO: fcm:um_br/pkg/Share/vn8.2_pkg_ukca_bugfixes Puma: fcm:um_br/dev/nhsavage/vn8.2_pkg_ukca_bugfixes	Lodged at UM8.3. Note: Likely to clash with some vn8.2 science branches.	CLOSED	-
2	SO3 missing from UKCA_CSPECIES
3	MODE diagnostics indexing issue
4	Correct the methane initialisation when l_prescribe_ch4 option is selected
5	Logic for Heterogenous reactions under TropIsop Chem
6	String length differences in Strat+Trop reaction rate definition array
7	Incorrect Loop control for a Fast-JX routine
8	Remove N2O from lumped N species for Stratospheric Chemistry
9	Fix an initialisation issue that caused consecutive runs to give different results
10	Incorrect read-size for a Fast-JX lookup table
11	Minor write statement formatting issues
12	Minor variable/ array initialisation issues.
13	Missing initialisation of COS LowBC	#4956	#651	8.2 CheST+Aero	MetO: fcm:um_br/dev/hadfo/vn8.2_ukca_COSmmr_bugfix Puma: fcm:um_br/dev/foconnor/vn8.2_ukca_COSmmr_bugfix	Lodged at UM8.2	CLOSED	-
14	UKCA Age-of-Air setup bug	#5175	#636	8.2-8.5 AgeAirOnly	MetO: fcm:um_br/dev/hadzm/vn8.5_ukca_AgeAirOnly_fix Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at UM8.5	CLOSED	-
15	Incorrect factors for MODE emiss diagnostics	Part of #4301	#636	8.4-8.5 GLOMAP	MetO: Included in fcm:um_br/dev/hadcj/vn8.4_ukca_combined_scav fcm:um_br/dev/hadcj/vn8.5_ukca_combined_scav Puma: fcm:um_br/dev/cce_cj/vn8.4_ukca_combined_scav fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at UM8.5	CLOSED	-
16	Array Dimensioning/ Indexing issues affecting ENDGAME	#5420	#636	8.4-8.5 EG+UKCA	MetO: fcm:um_br/dev/hadzm/vn8.5_ukca_dims_uninit_fixes Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at UM8.5	CLOSED	-
17	Activate: Value underflow trap combined with debug-level	Part of #5420	#636	8.2-8.5 Activate	MetO: Included in fcm:um_br/dev/hadzm/vn8.5_ukca_dims_uninit_fixes Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at UM8.5	CLOSED	-
18	Errors in UKCA CheST+Het/PSC setup code	#5465	#652	8.5 CheST+ Het/PSC	MetO: fcm:um_br/dev/fris/ vn8.5_fix_het_psc Puma: fcm:um_br/dev/foconnor/ vn8.5_fix_het_psc	Lodged at UM8.5	CLOSED	-
19	Change in UKCA results when print/ debug level is changed	#5470	#636	8.2-8.6 GLOMAP	MetO: fcm:um_br/dev/hadzm/vn8.6_ukca_fix_prstatus_diff Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at UM8.6	CLOSED	-
20	Failures in asad_chem_diags when Print-level=Diag and using UmPrint as Asad debug output exceeds buffer size	Part of #5470	#650	8.6	MetO: Included in fcm:um_br/dev/hadzm/vn8.6_ukca_fix_prstatus_diff Puma: fcm:um_br/dev/mdalvi/vn8.6_ukca_remove_asad_prints	Lodged at UM8.6	CLOSED	-
21	Incorrect calculation of some ASAD 3-D diags	#5922	#636	8.2-8.6	MetO: fcm:um_br/dev/hadlk/vn8.6_UKCA_3Demis_FixUnits Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at UM8.6	CLOSED	-
22	Indexing bug - sin_v_latitude	Part of #5420	#636	8.5 EG+UKCA	MetO: Included in fcm:um_br/dev/hadzm/vn8.5_ukca_dims_uninit_fixes Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at UM8.5	CLOSED	-
23	Bug in Fast-JX mass calculation	#5404	#565 Also #636	7.3: FastJX	MetO: fcm:um_br/dev/frtf/ vn8.4_fastj-x_debug Puma: fcm:um_br/dev/luke/ vn8.4_FJX_dm_3d_bugfix fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Seems to mostly affect Low-top or hi-res runs. Lodged at vn9.0	CLOSED	-
24	Erroneous 50% reduction factor in aerosol sedimentation velocity calc	Part of #6105	Part of #647	8.2: GLOMAP	MetO:Included in fcm:um_br/dev/frjy/ vn8.4_ukca_vgrav_av fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: fcm:um_br/dev/dan2012/vn8.4_Sedimentation_Fix fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
25	ACTIVATE uses saturation mix ratio instead of saturation vap pressure	Part of #6105	#636	8.2: ACTIVATE	MetO: fcm:um_br/dev/frjy/ vn8.4_ukca_vgrav_av fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: Included in fcm:um_br/dev/dan2012/vn8.4_Nenes_Activate fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
26	TropChem: uses mmr instead of vmr for Q	Part of #6105	#636	8.2: TropIsop	MetO: fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
27	Erroneous reaction rate for OH+MGLY reaction	Part of #6105	#636	8.2:	MetO: For StratTrop/CheST fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 for TropIsop Included in: fcm:um_br/dev/hadfo/vn8.4_ukca_ update_tropisop_rate_coeffs Puma: For StratTrop/CheST fcm:um_br/dev/foconnor/vn8.4_ukca_bugfix _StratTrop_OHMGLY_rxnrate For TropIsop/CheT: Included in fcm:um_br/dev/foconnor/vn8.4_vn8.4_ukca _update_tropisop_rate_coeffs fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0 (StratTrop only)	CLOSED	-
28	Indexing bug - all_tracers array in Plume Scavenging branch	Part of #6105	None	8.4: EG+Plume Scav	MetO: Included in fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
29	Indexing bug - asad_chemdiags%diag_type in asad_tendency_ste	Part of #6105	#636	8.2:	MetO: Included in fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
30	Indexing bug - f3_at_u	Part of #6105	#636	8.4: EG+UKCA	MetO: Included in fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
31	FP exceptions in asad_sparse_vars or asad_spimjmp	#5616 UM:#368	#555	7.3: CheT+Aero	MetO: fcm:um_br/dev/fris/vn8.4_increase_rafeps Puma: fcm:um_br/dev/nhsavage/vn8.4_increase_rafeps	Temporary Work-around. May not work in all cases CLOSED as not seen any more. May re-open	CLOSED	Nick Savage
32	ACTIVATE:uses cloud_liq_water (diagnostic) which is not consistent with cloud fraction (prognostic)	Part of #6105	#636	7.3: ACTIVATE	MetO: fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
33	RADAERv2 in UMUI: Look-up table files linked to wrong Unit numbers	None	None	8.5-8.6	Enter _an_ files for accumulation mode and _ac_ files for the aitken/insol accum mode boxes on the RADAER panel	No code change involved	CLOSED	-
34	ACTIVATE: Argument dimensions not compatible with ENDGame (should specify 1:model_levels)	Part of #6105	#636	8.5: EG-Activate	MetO: Included in fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes _package_for_GA7 Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86	Lodged at vn9.0	CLOSED	-
35	Error in labelling: Surface resistance <--> stomatal resistance ?	#6417 UM:#1409 um:#5751	#653	7.3:	None	Will be folded into larger dry deposition work plan	OPEN	Fiona O'Connor / Garry Hayman
36	Error in calculation of Column Ozone diagnostic	UM:#102 UM:#564		7.3:	MetO: fcm:um_br/dev/hadvh /vn8.2_coloz_fix Puma: fcm:um_br/dev/foconnor/ vn8.2_coloz_fix	Lodged at vn10.1 as part of the UKCA bugfix package vn10.1_ukca_bugfix_package under ticket UM:#564	CLOSED	-
37	Mismatch in levels for UKCA non-transported prognostics/ chem_diags. Dimensions not compatible with ENDGame	#6376	#649	9.1 ENDGame-UKCA	MetO: fcm:um_br/dev/hadzm/vn9,1_ukca_fix_chemdiag_levs Puma: fcm:um_br/dev/mdalvi/vn9.1_ukca_fix_chemdiag_levs	Lodged at vn9.1	CLOSED	-
38	Missing logical for volcanic so2 emissions.	UM:#1350 #6418	#656		MOSRS: branches/dev/mohitdalvi/vn10.5_make_volc _so2emiss_optional	Lodged at 10.6	CLOSED	Mohit Dalvi
39	Fast-JX fails if .NOT. L_PC2 and .NOT. l_3d_cca	#6443	#667	8.2-9.1	MetO: fcm:um_br/dev/fris/vn9.1_fastjx_index_bug Puma: fcm:um_br/dev/nhsavage/ vn9.1_fastjx_index_bug	Lodged at vn9.1	CLOSED	-
40	UKCA fails if MODE switched Off 10m wind not in D1 but req for AeroChem	Part of UM:#112		9.1 UKCA+AeroChem; MODE & CLASSIC Off	MOSRS: fcm:um.xm_br/dev/mohitdalvi/vn10.0_ukca_update_app	Lodged at vn10.0	CLOSED	-
41	OC biomass burning emissions - incorrect conversion. Assumes emissions as kg POM, but (new) ancils are kg C	#6429		vn8.5:	MetO: fcm:um_br/dev/fpbj/ vn8.6_ukca_mode _BBOC-POM_bugfix Puma: None	The scaling up of OC to POM is now expected to be done when creating the ancils. In the netcdf system the units (i.e. OC or POM) will be explicitly given in the meta data to avoid this problem.	CLOSED	-
42	RADAER lookup table reading bug. Input values not passed to RADAER	#6616 part of MOSRS UM:#112		vn9.2: with RADAER	MetO: fcm:um_br/dev/hadzm/vn9.2_ukca_fix_radnml_read MOSRS: fcm:um.xm_br/dev/mohitdalvi/vn10.0_ukca_update_app	Lodged at vn10.0	CLOSED	-
43	Reconfiguration bug. L_UKCA used for setting tr_levels before RUN_UKCA is read			vn8.3:vn9.0 UKCA with Classic fully Off	MetO: fcm:um_br/dev/hadzm/vn8.6_fix_rcf_stshcomp_ukca Puma: None	Automatically fixed under STSHCOMP rationalisation at vn8.6 (#5331)	CLOSED	-
44	Logicals set to default TRUE: l_ukca_ibvoc: aborts if JULES copy is not set. l_ukca_plume_scav: non-GLOMAP (e.g. Age-Air only) run crashes.	part of MOSRS UM:#112		vn9.2: UKCA	MOSRS: fcm:um.xm_br/dev/mohitdalvi/vn10.0_ukca_update_app	Lodged at vn10.0	CLOSED	-
45	nlev is not passed to asad_impact in asad_cdrive	UM:#252		All versions	MOSRS: fcm:um.x_br/dev/scottwales/r1974_asad_impact_argument	See MOSRS ticket UM:#252. Lodged in vn10.0. EXBUG from NCI.	CLOSED	-
46	Inconsistent use of wet_levels and model_levels in UKCA_AERO_CTL 1-D arrays	None		All versions	None	Impact if wet_levels/= model_levels, but this option has never been supported for New Dynamics or ENDGAME and wet_levels is being retired by UM:#425 from 10.2.	CLOSED	-
47	Dimension mismatch: q_chem, t_chem not considering extra level for ENDGame	UM:#379		ENDGame-UKCA	Example fix here (MOSRS)	Lodged at UM10.1 as part of UM:#239	CLOSED	-
48	Bugs in RADAER - dimensions, asymmetry param	UM:#380 UM:#564		All RADAER	Example fix here (MOSRS) and here (MOSRS)	Leads to div-by-zero error in rescale_phase_fnc. Lodged at UM10.1 as part of the UKCA bugfix package under ticket UM:#564	CLOSED	-
49	UKCA emissions: incorrect number, un-initialised slots in all_emissions()	UM:#381		All UKCA	Example fix here (MOSRS)	Lodged at vn10.2 as part of UM:#805	CLOSED	Mohit Dalvi
50	ukca_solve_coagnucl failures	UM:#319		UKCA-GLOMAP	Example fix here (MOSRS)	Mainly a workaround To be lodged	CLOSED	Mohit Dalvi/Graham Mann?
51	Units of wetland emissions	UM:#571		All versions	Example fix here (MOSRS)	Wetland emissions misinterpreted as gridbox mean rates rather than a land fraction rate - Lodged at UM10.1 as part of the UKCA bugfix_package under ticket UM:#564	CLOSED	-
52	PSC surface area set to zero?	UM:#609, UM:#595		UKCA with l_het_psc		Lodged at UM10.4 595 corrects GLOMAP aero surf area units, 609 corrects logic for using Clim/CLASSIC/GLOMAP aero surf area	CLOSED	Mohit Dalvi/ Luke Abraham
53	UKCA RADAER namelists aren't read on the Cray	UM:#577		RADAER, some platforms only	Change to input files, not code M. Richardson to share info on back porting'	Files have been edited after vn10.1 by Sytems Team : for older versions here is a Namelist workaround	CLOSED	-
54	Offline oxidants Chemistry: Diagnostics not properly initialised	UM:#659		Offline Chem	vn10.3.1_ukca_correct_oxidants	Lodged at UM10.3	Closed
55	Use of trigonometric variables e.g. f3_at_u not consistent with ENDGame	UM:#658		All UKCA	vn10.2_ukca_bugfixes_package	Lodged at UM10.2 as part of #805	CLOSED	Mohit Dalvi
56	Array size issues with UKCA tracers when using EG limited area models	UM:#682		ENDGAME UKCA LAMs	MOSRS: vn10.1_ukca_eg_array_dims	to be lodged at UM10.2	lodged at UM10.2	CLOSED	-
57	Incorrect logic for DMS anciliaries required	UM:#756		UKCA jobs not using CLASSIC but without DMS in chemistry	MOSRS: vn10.1_aqum_eg_fixes	Model stops with message about missing input. Low priority - rare edge case with informative error message. See UM:#2814.	CLOSED	Nick Savage
58	Fastj-X runs on patches all in dark	UM:#1360		UKCA jobs using FastJ-X	None yet	Optimisation not bug. Ticket stays open but does not belong here	CLOSED	Nick Savage
59	Mismatch in levels while reading CDNC from D1 under ENDGame	UM:#704		EG-UKCA vn9.0+ with Indirect effects	MOSRS: vn10.0_fix_cdnc_lev	Lodged at UM10.2	CLOSED	Mohit Dalvi
60	Model failure with PrStatus_Diag	UM:#784		UKCA on Cray	MOSRS: vn10.2_ukca_prstat_diag_fixes	Lodged at UM10.2	CLOSED	Mohit Dalvi
61	MPI BCAST bug in NetCDF emiss code	UM:#782		vn10.1 UKCA with Netcdf emiss	MOSRS: vn10.2_ukca_netcdf_bcastbug	Lodged at UM10.2	CLOSED	Mohit Dalvi
62	Inconsistency in aero_surf area used in heterogeneous reactions routine	UM:#778		UKCA+ het		Fixed as part of #98 (non transported prognostics	Closed
63	Inconsistency in timestep/ interval calculation for BE-Offline scheme	UM:#774		All BE Offline	vn10.2_ukca_repair_interval	Lodged at vn10.2	CLOSED	Colin Johnson
64	Very low cloud fraction values can cause failures in Fastj/jx	UM:#757		Any	Temporary fix: vn10.2_ukca_acf_zero	Temporary workaround lodged at vn10.2	CLOSED	-
65	qcl not correctly initialised in ukca_calc_aqueous_6a	Part of UM:#805		UKCA run with 6A convection	MOSRS: vn10.2_ukca_bugfixes_package	Lodged at UM10.2	CLOSED	Mohit Dalvi
66	Crash in NetCDF emissions and oxidants routines when using NetCDF-4 libraries	NA		vn10.0-10.2 UKCA + NetCDF	MOSRS: vn10.2_ukca_readnc_offline_fix	Automatically fixed as part of UM:#282	CLOSED	-
67	Error in indexing of Radiative gases array. Radiation sees MMR of the wrong ('next') species	UM:#1150		All EG-UKCA with gas-radiative feeback	MOSRS: vn10.2_grgas_addr_fix	Lodged at UM10.3	CLOSED	Marc Stringer (UKESM)
68	HO2 heterogeneous loss rate 1st order(?)	No ticket	No ticket	Strat-Trop and Tropisop with l_ukca_trophet=TRUE	None	This may be correct	CLOSED	Nick Savage
69	Inconsistency between aerosol size and mmr/Nd. wetdp and drydp not recalculated after aerosol remoding	UM:#1089		ALL UKCA- GLOMAP.	MOSRS UM10.2: vn10.2_ukca_wetdp_drydp_recalc_bug [MOSRS UM10.3: vn10.3_ukca_wetdp_drydp_calc_fix	Leads to unphysical large spikes in AOD. Believe UM7.3 jobs may be unaffected but haven't checked. Lodged at UM10.4	Closed
70	Age-of-air only configuration does not work at UM10.3	part of UM:#1171		UM10.3 Age-air-only	MOSRS: vn10.3_ageair_and_minor_fixes	Lodged at UM10.3	CLOSED	Mohit Dalvi
71	Minor bugs flagged up by rigorous compilation flags: dust_flux: array not allocated if L_dust=False, but passed regardless to ukca_new_emiss_ctl soil_layer_moisture: first dimension=0 if no land on PE. advt(): variable used in loop over total tracers when size is jpctr (=chem_tracers). nldepx: out-of-bounds with Offline oxidants scheme. Size of array should be 6+jpspec, based on information from ASAD developer.	UM:#1171		UKCA+NetCDF emiss	MOSRS: vn10.3_ageair_and_minor_fixes	Lodged at UM10.3	CLOSED	Mohit Dalvi
72	UKCA Dry Deposition: Surface resistance values not set for some species	UM:#1250		UM7.3+	MOSRS: vn11.0_surface_resistance	Lodged at vn11.1 Follow-on ticket to remove temporary logical (l_fix_improve_drydep) UM:#3997	CLOSED	-
73	UKCA-GLOMAP: MDT< MDTMIN warnings from GA6+ runs	UM:#1251		UM7.3+	None yet	To be Lodged	CLOSED - see UM ticket UM:#1332	Graham Mann
74	Bug in ukca_tropopause with definition of PV tropopause Fix to be combined with Bug 75 below	UM:#1283 New ticket UM:#1367		UM10.3	MOSRS: vn10.6_ukca_tropopause_amendment	Scope extended to include modifications to print statement. To be Lodged, but isn't sufficient to fix STE flux diagnostics Lodged at vn11.2	CLOSED	Mohit Dalvi
75	Bug in STE fluxes	UM:#1367		ENDGame?	vn11.1_ukca_fix_o3_ste	Lodged at vn11.	CLOSED	Mohit Dalvi
76	Scale Lightning emissions	UM:#1310		UMvn7.3+	vn10.2_scale_lightning_nox works but scaling is to be added as namelist variable for lodging purposes	Lodged at 10.5	CLOSED	-
77	Bug in microphysics process rates used by GLOMAP which leads to process rates being ~O(10) times too low and hence too small aerosol removal. The aerosol removal has to be tuned in response to this bugfix	bugfix: UM:#367 Tunings: UM:#854		GA4 + Configs [tunings applied in GA7 development +)	Bugfix: vn10.2_mphys_bugs_improvements Tunings: vn10.2_ukca_asnow_rfrac_tune Bugfix and Tunings backported to PUMA br at UMvn8.4. Bugfix: mdalvi/vn8.4_mphys_bugfix Tuning: j.mollard/ vn8.4_scav_bugfix _with_JMscavimpr [revision 20160]	Both Lodged from UM10.3	CLOSED	Jonathan Wilkinson/Jane Mulcahy
78	GLOMAP dust bugs: 1. Mapping of bin->mode emissions 2. incorrect STASH options codes	UM:#1355		UM10.2:, GLOMAP with dust	vn10.3_ukca_dust_diag_emis_fixes	Lodged at UM10.3	Closed	Stephanie Woodward
79	Aerosol Impaction scavenging bugs: 1. Incorrect use of Conv Frac (FC) 2. Total (conv+dyn) precip rate applied separately for convective as well as dynamic scavenging (double counting)	UM:#1421 Retire logical at UM:#4145		vn7.3: GLOMAP	vn10.3_ukca_impscav_fix vn11.1_retire_l_fix_ukca_impscav	Lodged at UM10.3 Target UM11.2	Closed
80	H2O feedback broken under ENDGAME	UM:#1646		All EG jobs with H2O feedback?	None	In progress	CLOSED	Colin Johnson
81	Runs with segment/ restart interval < 5 days fail due to NetCDF emiss update bug	UM:#948 but to be fixed under UM:#162		UM10.2+ , NetCDF emissions	Temporary workaround: 1.vn10.3_ncdf_emiss_greg_fix. 2. Use NetCDF emissions from /projects/ukca-meto/mdalvi/ancil/daily	Lodged at 10.6.1	CLOSED	Alistair Sellar/ Mohit Dalvi
82	Incorrect arguments to ukca_calcminmaxndmdt.F90	UM:#1801		10.2 - 10.4	r21272 of vn10.4.1_ukca_refactorings	Causes extra output from some PEs. Does not change results. to be lodged with other refactorings	CLOSED	-
83	error in the indexing of the tot_tracer array in the convective plume scavenging	UM:#2036		? - 10.5	r21272 of vn10.4.1_ukca_refactorings	the number tracer for the first active mode will not be scavenged and there will be plume scavenging happening to the passive ozone or age of air tracer if using a chemistry scheme with l_ukca_advh2o TRUE. Fix lodged at 10.6	CLOSED	Nick Savage
84	NetCDF error when using UKCA and Nudging: Model fails with 'EM_GET_VAR_INFO: Time dimension info not found, check if em_fopen was called with option l_ignore_time = .TRUE.'	UM:#2095		10.2 onwards; UKCA+Nudged	vn10.5_nudge_fixes_and_new_app Includes other Nudging bug-fix and new rose-stem app	Lodged at UM10.5	Closed	Mohit Dalvi
85	Failure if using UKCA as Age-air-only Error: "Type of solver (0) not recognised" (as this config does not use any chemical scheme)	UM:#2148		10.5 Age-air-only e.g. GA7 w/o GLOMAP	vn10.5_ukca_ageair_fix	Lodged as part of #1232 at 10.6.1	CLOSED	Mohit Dalvi
86	Discontinuity in photolysis diagnostics	UM:#2286		At least UMvn10.5		Fixed as a side effect of #1958	CLOSED	Fiona O'Connor
87	Possible issues with YSTORE in UKCA_CHEMISTRY_CTL. This may mean than there is no H2SO4 because of this, with impacts on GLOMAP aerosols. Need to also select the correct products in chemistry_ctl	UM:#3245		vn8.2+	Combination of two different bugs - see branches/dev/lukeabraham/vn11.3_ukca_ystore	Lodged at vn11.3	CLOSED	Luke Abraham
88	Potential FastJX Scattering Bug	UM:#3261		vn7.3 onwards	vn10.6.1_fastjx_scattering_fix vn10.8_fastjx_scattering_fix	Lodged at vn10.9	CLOSED	David Wade/Luke Abraham
89	Sea Salt Density	UM:#2405		vn7.3 onwards	vn10.8_ukca_ss_density_correction	Lodged under a temporary logical at UM10.9 (so not on by default) "l_fix_nacl_density" in namelist:temp_fixes UM:#3490 follow up ticket will review temp logical.	CLOSED	Colin Johnson
90	Extremely high/low NOy concentrations	UM:#3400 UKESM:#469		vn7.3 onwards (at least)	vn10.8_ukca_nat_fixes	Will be fixed for vn10.9. Runaway HNO3 values at the surface due to BL NAT sedimentation lead to global corrections during transport, leading to large stratospheric loss with knock-on impacts to O3 and ClONO2 etc.	CLOSED	Mohit Dalvi/Luke Abraham
91	N-R offline oxidants broken at UM10.9 and a missing k index	UM:#3606		vn10.9 for break and vn9.1 for k index	vn10.9_fix_offline_oxidants	Lodged at UM10.9	CLOSED	Marc Stringer
92	UMDP084 incorrectly labels 38-476 ("Liquid cloud fraction") with units "m-3". It is a pure fraction (in the range 0.0 to 1.0) and so has no unit.	UM:#3025				Lodged at UM11.1	CLOSED	-
93	Inconsistent surface resistance values for organic hydro-peroxide (rooh)	UM:#1250		Unknown	vn11.0_surface_resistance	Lodged at vn11.1 Follow-on ticket to remove temporary logical (l_fix_improve_drydep) UM:#3997	CLOSED	-
94	Data corruption in Age-of-Air (and possibly Passive O3) diagnostic on pressure levels	UM:#3718		vn10.2+	vn10.9_ukca_debug_ageair_on_plev vn11.0_ukca_ageair_and_stashm	Lodged at UM11.0	CLOSED	Mohit Dalvi
95	wet/dry deposition flags for ozone are not consistent					This is a feature not a bug.	CLOSED	-
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_act_wo_radaer.	Closed as a feature. This problem has been solved for the aerosol climatologies (see ticket UM:#3874) which use stash addressing rather than d1 addressing. Work will begin after re-factoring of UKCA stash handling in UM:#4367	CLOSED as feature
97	"magic" numbers incrementing imode (e.g. . imode+4 , imode-4 , imode+3 , imode-3 ) See e.g. src/atmosphere/UKCA/ukca_calc_coag_kernel.F90	UM:#4284		Unknown		Not a bug: "For the coarse soluble mode (imode=4) there is no larger soluble mode and also there is no larger insoluble mode. It is intended that, for that mode, there is no intra-modal coagulation with other modes."	CLOSED	-
98	Incorrect usage of npft integer when npft == 9 OR 13	UM:#4157		All versions with these options	vn11.1_fix_npft	Lodged at vn11.2 Follow-on ticket to remove temporary logical (l_fix_ukca_h2dd_x) UM:#4245	CLOSED
99	UKCA dry deposition ukca_aerod.F90 HBr HOBr HCl HOCl	UM:#4312		vn7.3+	vn11.1_dry_dep_species	Lodged at vn11.2 Follow-on ticket to remove temporary logical (l_fix_improve_drydep) UM:#3997	CLOSED
100	Negative concentrations of pvol_wat()	UM:#4383		Unknown	vn11.2_fix_neg_pvol_wat	Lodged at vn11.2 Follow-on ticket to remove temporary logical (l_fix_neg_pvol_wat) UM:#4416	CLOSED
101	Errors in reaction rates and diagnostics	UM:#4466		Unknown	NA		CLOSED	Scott Archer-Nicolls Luke Abraham
102	Error in RESHAPE (size 3rd dimension) in ukca_main before CALL lsp_qclear	UM:#4595		NA	vn11.2_fix_ukca_reshape	Not a bug Testing indicates that KGO change owing to refactoring results from compiler optimisation	Closed
103	Incorrect indexing of tmprc array: ASAD_SPIMPMJP	UM:#4562		All versions	Possible fix mentioned on ticket	To be Lodged	CLOSED	Luke Abraham
104	Incorrect value for Rc for SO_2 deposition to open water	~~UM:#4635~~ UM:#5167		vn	vn11.0_Ocean_depo_tweaks	To be Lodged	Closed	Catherine Hardacre
105	segmentation fault on ukca_plev_diags_mod.F90	UM:#4625		Unknown	vn11.2_ukca_cce_87	Ticket lodged for UM vn11.3	Closed	-
106	NaNs appearing when new UKCA science is turned on	UM:#4397		Since vn11.1	vn11.3_ukca_exp_rose_stem	Lodged at vn11.4	CLOSED	Luke Abraham
107	Missing c_h2o conversion factor in offline_oxidants_be	um:#4714 um:#5118			vn11.1_offline_ox_solver_investigation	Code is zq(:)=RESHAPE(q(:,:,k),(/theta_field_size/)) rather than zq(:) = RESHAPE(q(:,:,k),(/theta_field_size/))/c_h2o	Closed	Luke Abraham
108	Incorrect stash processing of GLOMAP load*, conc* and plume_scav diagnostics	UM:#4909		UM10.6.1+	None yet	To be Lodged after 11.6	CLOSED	Mohit Dalvi
109	Bug in dry deposition of CH4 for 13/17/27 tiles	UM:#5919		UM10.4+	None yet	Bug has been fixed for vn12.0 further CH4 emissions code under development underway but no more bug fixes required.	CLOSED	Gerd Folberth
110	UKCA solar-cycle routine does not pass NRUN-CRUN test	UM:#4828		UM10.8+	vn11.3_ukca_solcyc_nruncrun	To be Lodged after 11.5	CLOSED	Luke Abraham
111	Cloud fraction array (cloud_frac) passed with wrong number of levels Array passed as (row_length, rows, :), so offset by 1 level under ENDGame	Part of UM:#4822		All ENDGame versions	vn11.3_ukca_fix_cloudfrac_dim	To be Lodged for 11.5	Closed	John Hemmings
112	delh2so4_chem is calculated incorrectly Incorrectly "fixed" in UM:#3245 (Bug #87).	UM:#5076		All StratTrop+GLOMAP versions post vn8.2. Made worse post-vn11.4 if logical l_fix_ukca_h2so4_ystore is True.	vn11.4_ukca_ystore_fix	To be Lodged for 11.6	Closed	Luke Abraham
113	Latitude bugs affecting LAM configurations	UM:#5119		Unknown	None yet	To be lodged for 11.6	Closed	John Hemmings
114	Bug in ukca_activate leading to droplet numbers being too high in the upper regions of continuous cloud columns	um:#5233			r70341	Previously the number per m3 was replicated upwards from cloud base, but really this should be the number per kg of air to mimic what would happen in a rising air parcel (parcel expansion would lead to the number per m3 reducing with height as an air parcel rises, scaling with the air density). This is likely to make the largest difference for deep clouds where there are deep contiguous columns.	Closed	Dan Grosvenor
115	Some UKCA-related variables accessed in other parts of UM remain undefined in non-UKCA configurations Was Suite that does not call GLOMAP mode setup	UM:#5151		Unknown	None yet	To be lodged for 11.6	Closed	Mohit Dalvi
116	Problem with the "specific humidity change from UKCA" diagnostic (stashcode 50240)	UM:#5164 UM:#3875		Unknown	None yet	See information in UM:#4819	Closed
117	Fix call to extract_seg and insert_seg in ukca_aero_ctl	UM:#4954		10.7+	None yet	See both scitech and code review of UM:#4739	Closed - not a bug
118	lam should be REAL in acsn2o5_mod.F90	UM:#5271		Unknown	Fix is trivial	Requires testing will result in KGO change	Closed
119	Incorrect calculation for gridbox area - only affects GLOMAP-mode diagnostics	um:#5506		ALL versions	None yet	Calculation of volume appears correct, but area is not. This calculation is missing the factor fv_cos_theta_latitude so will not cause area to tend towards zero at the poles. It also seems to use an unnecessary approximation to the latitude difference (based on sinv_latitude) which may break down at high latitudes. The calculation should perhaps be consistent with subsequent volume calculation but without the delta_r factor. This will likely only affect diagnostics calculated in ukca_emiss_diags_mode, where it is used to convert from kg/m2/s to mol/gridbox/s, although it is also printed out in ukca_aero_ctl. Not actually a bug, but is inconsistent between volume & area calculations. Take off as a bug. May be related to mass to calculation differences. Will be moved outside to the parent model.	CLOSED - NOT A BUG
120	nrsteps warning message - eg um_n48_ga_amip_exp	UM:#5505		Unknown		Perhaps this should have a clean fail rather than warning? There may be a lot of rose-meta and code changes to allow nr_steps to be set in niche cases.	Closed	Mohit Dalvi
121	Missing ']' in STASHmaster-meta.conf entry for new item `34871`	UM:#5483		UM11.6	trivial	Does not affect Rose/STASH working, but prints warning in terminal	Closed	Marc Stringer
122	O(1D) is calculated incorrectly as a steady-state species	UM:#5525		UM11.6	trivial	Only affects the diagnostic. Values are a factor of 3 too large	Closed	Luke Abraham
123	ACTIVATE scale-invariance problem	UM:#5532		UM11.6		More of an issue for LAMs. Small effects for climate simulations.	Closed	Hamish Gordon
124	H2 and N2 cannot be set for RCP and WMOA1 scenario routines	UM:#5620		All versions		Values are hard-wired in the code and cannot be changed without a branch	OPEN	Mohit Dalvi
125	Technical/ Rose-stem : ignore-missing flag applied to all Strattrop/CRIstat rose stem tests (instead of just NRUN-CRUN ones).	UM:#5752		UM10.9+		This is likely to have missed differences in the number of output fields under subsequent changes	CLOSED	Mohit Dalvi
126	Fast-JX: Double counting of earth-radius in calculation of spherical mass-weighting factors. (Routine fast-jx_sphere)	UM:#5760		All versions		Lodged at UM11.8	CLOSED	Mohit Dalvi
127	GET_EMDIAG_STASH: Return value from function can remain unset	Lodged as Part of UM:#5555		All NCDF emiss versions		No value expected for aerosol emissions, but variable remains unset.	CLOSED	Mohit Dalvi
128	Bug in UKCA stratospheric chemistry diagnostics	UM:#5839		pre-UMvn10.0		The indexing/values of diagnostics m01s50i101-i104 are incorrect. Fixes provided for vn11.1 and vn11.7. May affect CMIP6 diagnostics	OPEN	Luke Abraham
129	Warning messages in ukca_radaer_lut_in	UM:#5957		All versions		Fixed as side effect of UM:#5957	CLOSED
130	Bug in aerosol dry deposition when using 27 surface types in JULES	Parially fixed using UM:#5622		All versions		The bug exists because of an erroneous dependency on the array size NTYPE (from JULES_SURFACE_TYPES_MOD) in subroutines UKCA_DDEPAER and UKCA_DDEPAER_INCL_SEDI. This is not appropriate because most of the processing is not written to be dependent on the surface types being used in JULES. A surface type at each location is instead inferred (in UKCA_AERO_CTL) from the roughness length and its index is held in the array ILSCAT. The index values are intended to be interpreted with reference to the JULES 9 type scheme. Only the values 1, 3, 7 and 9 are used, corresponding to forest, grassland, water and ice respectively. The indices are used to access arrays YR, CR and ALPHA that are set up in these aerosol dry deposition routines. The arrays should therefore always be of size 9 with values based on the 9 type scheme, irrespective of the JULES NTYPE value. However, alternative, incompatible arrays are set up if NTYPE is 13, 17 or 27. These were presumably intended to be accessed using the type indices consistent with the other JULES schemes but are actually accessed with the 9-type scheme indices available in ILSCAT. Inappropriate values will therefore be obtained when NTYPE is not 9. Note that Ticket UM:#5622 will fix the bug when interactive dry deposition is not used in the chemistry or when NTYPE in JULES is 13 or 17 but will not fix it when interactive dry deposition is selected (L_UKCA_INTDD = .TRUE.) and NTYPE is 27. Fixing it for NTYPE = 27 will change results so will require a separate bug fix ticket with appropriate testing and approval.	OPEN	Mohit Dalvi
131	Invalid surface roughness input to aerosol dry deposition over land			All versions		In the UM, UKCA uses the roughness length with stash code 00026 to infer the surface type for aerosol dry deposition (and for the old non-interactive gas dry deposition scheme). However, this value is only valid over the sea. It seems to be set to 0.5 over the land from the UM data I’ve looked at. This seems to be simply a filler value with no scientific significance. As a consequence of the 0.5 value, the UKCA aerosol dry deposition routines categorise all land as forest in the UM runs (routine ukca_aero_ctl uses z0>0.1m for forest). This will interact with bug #130 in aerosol dry deposition (see above) that occurs when using any number of surface types in JULES other than 9.	OPEN
132	Incorrect warning message in temp_fixes_module	UM:#5957		Since vn11.0		Fixed as side effect of UM:#5957	CLOSED
133	Running a xc40_intel_um_rigorous_noomp-ukca_strattrop_exp test (not part of rose stem), reveals the use of n as an index for rc() array which is out-of-bounds, in ukca_surfddr.F90 here.	UM:#6373		vn12.0		The bug is in a section of code where the points are supposed to be set to a minimal value, so should not be having any scientific impact.	CLOSED	Mohit Dalvi
134	GLOMAP-mode impaction scavenging routine ukca_impc_scav affected by the rate of aerosol removal by rainfall	UM:#6419		vn10.3+		A bug has been identified in the GLOMAP-mode impaction scavenging routine ukca_impc_scav that affects the rate of aerosol removal by rainfall. It is contained within code executed when the temporary logical l_fix_ukca_impscav is set to true. That code was introduced as a fix for two other bugs by #1421. The problem is caused by a mismatch of conditions under which the working variable interzz is (a) calculated and (b) used. Both (a) and (b) occur within the iprecip loop that loops over the two rainfall types (convective and large-scale). However, the use (b) occurs if totrain(jl) > 0.0 while the calculation (a) occurs in a preceeding nbox loop only if allrain(iprecip,jl) > 0.0. This will only work if both rainfall types are non-zero or both are zero. If convective rain is zero but total rain is not, scavenging associated with convective rain may still be non-zero, calculated using an un-initialised interzz value (potentially a non-zero compile-time value or the value from a previous call). Likewise, if large-scale rain is zero but total rain is not then scavenging associated with large-scale rain may still be non-zero, calculated using the interzz value for convective rain from the previous iteration of the precip loop. This bug was discovered during LFRic testing when the use of an un-initialised value caused the model to crash when UKCA was switched on in the proto_gal7 configuration. The bug can be fixed by using the allrain(iprecip,jl) > 0.0 condition in both nbox loops.	CLOSED	John Hemmings
135	The SO2 dry deposition improvements added under #5167 do not work for Convection permitting configurations (e.g Nested suite) and fail due to absence of Convection diagnostics. The error message could be turned to a warning and related fields initialised to zero	um:#6433		vn11.7+			OPEN	(Reported by Hamish/ Adrian)
136	There appears to be a bug in some Section 51 diagnostics.	6598		Probably when Section 51 was included.		51996 and 51999 are fine. 51921 and 51922 are broken. Other fields unknown. Problem uncovered during 6358	OPEN	(Reported by Marc / Alan)
137	The calculation of iso2_oh is incorrect in chemistry_ctl* due to a typo in prods (H2O should be HO2)	um:#4466		Longstanding bug.		Not seen if using l_fix_ukca_h2so4_ystore since vn11.6. It is recommended that all jobs run with l_fix_ukca_h2so4_ystore=.TRUE.	CLOSED	Luke Abraham
138	Missing dry deposition settings in ukca_aerod for RA13NO3, RA16NO3 and RA19NO3 for CRI-Strat v2.	um:#6626		Since vn12.0 (um:#6136)		Discovered in um:#5751.	OPEN
139	Several rose-stem failures on the new EX1A HPC	um:#6610		Since vn12.1		Also impacts use of gmed:#551.	OPEN

Package branches table

For every supported version, the aim will be to have a package that fixes all bugs known to exist at that UM version. The package will be supported on both the NCAS and Met Office repositories (until a single repository is created)

UM Versions	Ticket		Package Branch
	MetO	NCAS
8.2	#4382	#439	Meto: fcm:um_br/pkg/Share/vn8.2_pkg_ukca_bugfixes Puma: fcm:um_br/dev/nhsavage/vn8.2_pkg_ukca_bugfixes
8.3	#1	#2
8.4	#1	#636	Puma: fcm:um_br/dev/mdalvi/vn8.4_ukca_fixes_from_vn86
8.6	#6105 and #5404	#647	Meto: fcm:um_br/dev/hadfo/vn8.6_ukca_bugfixes_package_for_release_jobs Puma: fcm:um_br/dev/foconnor/vn8.6_ukca_bugfixes_package_for_release_jobs