REFERENSI TENTANG ACCESS MODEL BOM AUSTRALIA

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About the ACCESS model

The Australian Community Climate and Earth-System Simulator (ACCESS) weather models have been developed and tested by research staff from the Centre for Australian Weather and Climate Research (CAWCR) and are based on the UK Meteorological Office's Unified Model. The ACCESS suite of models has shown a significant improvement in accuracy over the Bureau's old weather model suite (GASP, LAPS and MesoLAPS), and output is available in map form or as gridded data products.
ModelACCESS-G
DomainGlobal
ResolutionApproximately 80km
Previous Model EquivalentGlobal Analysis and Prediction (GASP)
Time Step and Duration6 hourly to 168 hours (7 days)
Model Run Times and Typical Availability Times00Z run available 0610Z
12Z run available 1810Z
ViewsGlobal
Southern Hemisphere
Australia
Indian Ocean
Pacific Ocean
Available ElementsPrecipitation
Mean sea level pressure (MSLP)
Surface pressure & rainfall (MSLP & precipitation)
MSLP & thickness
Wind speed and direction at 10m, 850hPa, 700hPa, 500hPa, 200hPa, and gradient
Geopotential height at 850hPa, 700hPa, 500hPa, and 200hPa
Temperature at 2m screen, 850hPa, 700hPa, 500hPa, 200hPa
2m screen dew point
Relative humidity at 2m screen, 850hPa, 700hPa, 500hPa, and 200hPa
Stability field
ModelACCESS-R
DomainRegional
Resolution0.11° (~12km)
Previous Model EquivalentLimited Area Prediction System (LAPS_PT375)
Time Step and Duration3 hourly to 72 hours (3 days)
Model Run Times and Typical Availability Times00Z run available 0230Z
06Z run available 0830Z
12Z run available 1430Z
18Z run available 2030Z
ViewsFull domain
Australia
Available ElementsPrecipitation
Mean sea level pressure (MSLP)
Surface pressure & rainfall (MSLP & precipitation)
MSLP & thickness
Wind speed and direction at 10m, 850hPa, 700hPa, 500hPa, 200hPa, and gradient
Geopotential height at 850hPa, 700hPa, 500hPa, and 200hPa
Temperature at 2m screen, 850hPa, 700hPa, 500hPa, 200hPa
2m screen dew point
Relative humidity at 2m screen, 850hPa, 700hPa, 500hPa, and 200hPa
ModelACCESS-A
DomainAustralia
Resolution0.11° (~12km)
Previous Model EquivalentMesoLAPS (MESO_LAPS_PT125 & MA_LAPS_PT100)
Time Step and Duration3 hourly to 48 hours (2 days)
Model Run Times and Typical Availability Times00Z run available 04Z
06Z run available 10Z
12Z run available 16Z
18Z run available 22Z
ViewsAustralia
7 Regional areas TODO
Available ElementsPrecipitation
Mean sea level pressure (MSLP)
Surface pressure & rainfall (MSLP & precipitation)
MSLP & thickness
Wind speed and direction at 10m, 850hPa, 700hPa, 500hPa, 200hPa, and gradient
Geopotential height at 850hPa, 700hPa, 500hPa, and 200hPa
Temperature at 2m screen, 850hPa, 700hPa, 500hPa, 200hPa
2m screen dew point
Relative humidity at 2m screen, 850hPa, 700hPa, 500hPa, and 200hPa
ModelACCESS-T
DomainTropical
Resolution0.375° (~37.5km)
Previous Model EquivalentTropical (Extendd Domain) LAPS (TXLAPS_PT375)
Time Step and Duration6 hourly to 72 hours (3 days)
Model Run Times and Typical Availability Times00Z run available 0430Z
12Z run available 1630Z
ViewsFull domain
RSMC
Australia
SE Asia
SW Pacific
Northern Territory
Western Australia
Fiji
TODO
Available ElementsPrecipitation
Mean sea level pressure (MSLP)
Surface pressure & rainfall (MSLP & precipitation)
MSLP & thickness
Wind speed and direction at 10m, 850hPa, 700hPa, 500hPa, 200hPa, and gradient
Geopotential height at 850hPa, 700hPa, 500hPa, and 200hPa
Temperature at 2m screen, 850hPa, 700hPa, 500hPa, 200hPa
2m screen dew point
Relative humidity at 2m screen, 850hPa, 700hPa, 500hPa, and 200hPa
Deep layer mean wind
ModelACCESS-C+
DomainCity
Resolution0.05° (~5km)
Previous Model EquivalentCity-based MesoLAPS variants (MESO_LAPS_PT050 models)
Time Step and Duration1 hourly to 72 hours (3 days)
Model Run Times and Typical Availability Times00Z run available 03-0310Z
12Z run available 15-1510Z
ViewsVictoria/Tasmania
Sydney
Brisbane
Adelaide
Perth
Available ElementsPrecipitation
Meteograms
Wind speed and direction at 2m, 10, gradient, and 850hPa
Mean sea level pressure (MSLP)
ModelACCESS-TC
Domain3 relocatable domains
Resolution0.11&deg (~12km)
Previous Model EquivalentTropical-cyclone LAPS (TCLAPS)
Time Step and Duration 
Model Run Times and Typical Availability TimesRun on demand
Views 
Available ElementsTracks
ModelACCESS-O3
DomainGlobal
ResolutionApproximately 80km
Previous Model EquivalentSpecialist model to replace the ozone and UV components of GASP
Time Step and Duration6 hourly to 168 hours (7 days)
Model Run Times and Typical Availability Times00Z run available 07Z
ViewsGlobal
Southern hemisphere
Australia
Available ElementsUV index
Total ozone
Upper air charts are generally labelled with the pressure level in hectopascals (hPa), e.g. 500 hPa. The pressure decreases as altitude increases. For instance, the 250 hPa level is higher than the 500 hPa level. For some fields there are also charts representing the atmosphere 2 metres and 10 metres above the ground, and at the "gradient" level which lies about 1000 metres above the earth's surface and is the level most representative of the air flow in the lower atmosphere immediately above the layer affected by surface friction. This level is free of local wind and topographic effects (such as sea breezes, downslope winds etc).
Some charts show geopotential height, which approximates the actual height of a pressure surface above mean sea-level. Therefore, geopotential height contours on a particular map, e.g. 850 hPa, represent the height of that pressure surface.
Charts showing precipitation represent the amount of rainfall in millimetres which is forecast to fall at the ground over the preceding 3 or 6 hours. The period is shown in the chart heading as "3 hrly" or "6 hrly".
More detailed technical information on the ACCESS models is available in the NMOC Operations Bulletin No. 83 or the ACCESS NWP Data Documentation.

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