Known Issues - BOM BARPA (py18)

NCI records for Errata is given in Errata and Known Issues for CORDEX-CMIP6 and Regional Downscaling - CMIP Community - Opus - NCI Confluence.

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BARPA-R
Affected Model	Affected Domain	Affected Variable	Affected Frequency	Severity	Issues	Action	Status
All	Aus-15	evspsbl	All	Major	Data is yet to be released	Will be released in 2024	Fixed. Data is released with v20231001 and git commit 9e680fd and later.
All	Aus-15	sund, tasmax, tasmin, rluscs, rsuscs, rsdscs, rldscs, CAPE, evspsblpot, cll, clm, clh, clt, prc, prsn, pr, snm, tauu, tauv, mrros, mrro	1 day (sund only), 1 hr, 6hr	Minor	Time-bounds attribute is missing.	Time-bounds to be added	Current
BARPA-R-NorESM2-MM BARPA-R-CESM2 BARPA-R CMCC-ESM2	Aus-15	ta10, wa10, zg10, hus10	All	Minor	Missing data - low model top due to lack of mid-stratospheric driving data from driving GCM	data to be redacted	Current
All	Aus-15	CAPE and CIN	All	Moderate	Biases in CAPE and CIN due to inaccuracies in parcel ascent computation used in Unified Model UM v11.9.	Alternative data from Bureau's ConvParams will be made available but over a truncated domain limited to Australia	Current
All	Aus-15	evspsblpot	1 hour, 1 day	Minor	Isolated unphysical peaks and negative values due to modelling artefacts occur occasionally throughout dataset	No action	Current
MPI-ESM1-2-HR	Aus-15	evspsblpot	1 hour, 1 day, mon	Minor	Isolated unphysical peaks and negative values due to modelling artefacts was too large for packing. This occurs at 2079-07-18T00:30. This value has been masked in the model output before processing hourly, daily and monthly data.	Data to be masked	Fixed. Data masked with v20231001 and later.
All	Aus-15	evspsblpot	1hr, day, mon	Moderate	The potential evapotranspiration (PET) is the ET that would occur if the soil and vegetation are saturated. The PET scales with the friction velocity for each tile type (e.g., grass, shrub, broadleaf tree, bare soil), which depends on the canopy heights etc. PET is computed by the model for each tile type and the average across the tiles are computed and published. However, the energy constraint is not imposed on the calculation of this diagnostic in the model, which is different from using the Penman-Monteith equation. In other words, the PET diagnostic is simply driven by a surface to atmosphere humidity difference. Accordingly, it is expected that the PET diagnostic will be higher than the values in other PET products such as SILO PET (https://data.qld.gov.au/dataset/silo-climate-database). Different definitions of PET can be computed from BARPA's other gridded fields. For instance, Penman-Monteith equation requires 2m temperature (tas), relative humidity (hurs), wind speed (sfcWind), surface pressure (ps), net SW radiation at surface (rsds, rsus or rss), cloud cover (clt),	No action	Current
All	Aus-15	mon/mrfso, mrfsol, mrsol, mrsol, mrfsos, mrsos	All	Minor	Spin up of land surface moisture in alpine regions can take up to 3 years	No action	Current
All	Aus-15	hus10, 20, 30, 50, 70	6 hour, 1 day	Minor	Spurious values of high stratospheric humidity occur occasionally throughout datasets. A cap to the minimum value of specific humidity of 2.5e-6 has been applied at the domain boundaries	No action	Current
BARPA-R-ACCESS-CM2 ssp126	Aus-15	all variables	1 hour, 6 hour, 1 day	Moderate	Erroneous data has been masked: 2049-07-01 to 2049-07-03	Data to be masked	Fixed. Data masked with v20231001 and later.
BARPA-R-ACCESS-ESM1-5 ssp370	Aus-15	all variables	1 hour, 6 hour, 1 day	Moderate	Erroneous data has been masked: 2029-04-21 to 2029-04-22.	Data to be masked	Fixed. Data masked with v20231001 and later.
BARPA-ACCESS-ESM1-5 ssp126	Aus-15	all variables	1 hour, 6 hour, 1 day	Moderate	Erroneous data has been masked: 9/9/2073, 10/9/2073, 17/10/2073, 18/10/2073	Data to be masked	Fixed. Data masked with v20231001 and later.
BARPA-ACCESS-ESM1-5 ssp126	Aus-15	ua50m, ua100m, ua150m, ua200m, ua250m, ua1500m, ta50m, ta100m, ta150m, ta200m, ta250m, ta1500m	All	Minor	Data is missing: 2083-08	Data to be masked	Fixed. Data masked with v20231001 and later.
All	Aus-15	ta200m, ua200m, va200m, ua250m, va250, ta250m	All	Minor	Masked in regions with high orography	No action	Current
All	Aus-15	huss, hurs	1 hour	moderate	Spurious high values of humidity, due to the UM diagnostic calculation of 2m specific humidity. High values should be screened before use or 10m humidity should be substituted. A reduction in diagnosed screen temperature accompanies this spurious increase in diagnosed screen-level moisture. The fix combines the lowest model level humidity with 10 m humidity over land.	10 m humidity based on unaffected model-level fields over land will also be provided	Fixed
All	Aus-15	huss, hurs	All	minor	On rare occasions specific humidity has unphysical small negative values over a few grid cells. This also results in missing values for wet-bulb temperature.	Re-process data and set to minimum value	Current
All	Aus-15	tas, tasmax, tasmin	1 hour	minor	Spurious high values of humidity, due to the UM diagnostic calculation of 2m specific humidity. High values should be screened before use or 10m humidity should be substituted. A reduction in diagnosed screen temperature accompanies this spurious increase in diagnosed screen-level moisture.	10 m humidity based on unaffected model-level fields over land will also be provided	Current
All	Aus-15	prc	1 hour	Minor	Some months show an increase in maximum convective rainfall rates due to a reduction in the model timestep for model stability issues.	No action. A list of impacted months can be provided on request.	Current
All	Aus-15	hurs	1 hour	Minor	Relative humidity values in excess of 100% can be observed over the southern ocean. These are believed to be associated with supersaturation	No action	Current
BARPA-R-ACCESS-CM2, BARPA-R-EC-Earth3	Aus-15	ta1500m	1 hour	Minor	Single spurious high values present over oceanic grid-points: BARPA-R-ACCESS-ESM1.5 historical: 1968-02-11 14:00 BARPA-R-ACCESS-ESM1.5 ssp370: 2081-09-14 07:00 BARPA-R-EC-Earth3 ssp126: 2075-01-12 14:00 BARPA-R-EC-Earth3 ssp370: 2076-02-08 15:15	No action	Current
BARPA-NorESM2-MM historical	Aus-15	all radiation variables, first day only	1 hour, 1 day	Minor	Timestep on 1960-01-01 is shifted by 1.5 hours. No other days are affected	No action	Current
All	Aus-15	pressure level fields, 1000-700 hPa	All	Minor	Pressure level data: Where pressure level is less than surface pressure, data has been masked with fill_value	No action	Current
All	AUS-15	tauu, tauv	All	Moderate	The lat/lon grids for these variables remain in their modelling staggered grids, and thus inconsistent with other variables in the dataset	Reprocess the data to the common lat/lon grids	Fixed. Re-gridded data is released with v20240601 and git commit 3b55b33 and later.
BARPA-R-CMCC ssp370, BARPA-R-MPI-ESM1-2-HR ssp370, BARPA-R-CESM2 ssp126	AUS-15	tauu, tauv	6hr, day, mon	Minor	Values along the boundary of the domain are NaN in some time steps due to a re-gridding issue.	Mask the affected data values.	Fixed. The affected data is masked with v20240601
All	AUS-15	Many	All	Minor	Discrepancies in lat/lon values between different variables, due to differences to rounding	Rounding of the lat/lon values in process.	Fixed. The lat/lon values have been corrected with version v20231001 and later.
All	AUS-15	wsgsmax	All	Moderate	An error is found in the Unified model version 11.9 to 13 in its calculation of the wind gust diagnostics. An incorrect value is used to down weight the gust contribution where there was a large orographic roughness length from the form drag roughness scheme, leading to positive biases. The biases are larger over land than over sea, and the preliminary experiments over UK show an averaged mean error over land is 1-1.5 m s-1, solely due to this error. On average, the mean error is around 10% over land, and 5% over sea.	No action	Current
BARPA-R NorESM2-MM historical	AUST-15	All	3hr	Moderate	On the first of each month, the first time step is missing. A different cycling had to be used for NorESM (with a 3h offset), which seems to have affected ConvParams.	No action	Current
BARPA-C
All	AUST-04	precipitation	All	Moderate	There is a dry bias present in northern Australia during the wet season. A new model configuration to resolve this is under development.	No action	Current
All	AUST-04	maxcolwa, ztp	1hr	Minor	The troposphere height is determined by checking the lapse rate of surrounding model height intervals. The height cannot always be determined through this approach for BARPA-C with 40 km model lid, and as such the height values are masked." maxcolwa is impacted because it is the vertical max between the surface and tropopause, so it inherits nans when the tropopause hasn't be found.	No action	Current
All	AUST-04	evspsblpot	1hr, day, mon	Minor	Isolated unphysical peaks and negative values due to modelling artefacts occur occasionally throughout dataset	No action	Current
ACCESS-ESM1-5 historical	AUST-04	rsus	1hr, day	Minor	Spurious small value at lat=-16.5, lon=117, time=1996-01-05T21:30:00 associated with TC.	No action	Current
ACCESS-ESM1-5 historical	AUST-04	ta200m	20min, 1hr	Minor	Spurious large value at lat=-13.57, lon=119.5, time=1998-02-23T17:00.	No action	Current
ACCESS-ESM1-5 historical	AUST-04	rss	20min	Minor	Spurious large value at lat=-16.5, lon=117, time=1996-01-05T22:00 associated with TC.	No action	Current
ACCESS-ESM1-5 ssp370	AUST-04	ta150m, ta200m	20min, 1hr	Minor	Spurious large value at lat=-27.81, lon=132.02, time=2058-03-10 10:00 for one time step.	No action	Current
ACCESS-ESM1-5 ssp370	AUST-04	ta100m	20min, 1hr	Minor	Spurious large value at lat=-29.29, lon=125.1, time=2055-12-24 09:20 for one time step.	No action	Current
All	AUS-15	All	All	Minor	As the BARPA data was post-processed and published in stages, some inconsistency in the data attribute information that can affect loading multiple files using python.xarray.open_mfdataset . For instance, some files have crs and/or height metadata information but others do not. Users are advised to use the preprocess option in open_mfdataset to remove such inconsistency between individual data files (such as using xarray.Dataset.drop_vars) prior to concatenation.	No action	Current

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Known Issues - BOM BARPA (py18)