The mean sea level pressure (MSLP) isobars show lines of equal atmospheric pressure (hPa) that have been generated from the numerical prediction model, APS2 Australian Community Climate Earth-System Simulator (ACCESS) for greater Australia. The model incorporates equations that represent the motion of the atmosphere and its associated physics. The model is run four times a day at 0UTC, 06UTC, 12UTC and 18UTC and produces hourly forecasts from 0 hours (base time) to 72 hours. The isobars are derived from a 0.11 degree grid. As there is no manual input, the products generated will differ from the official forecasts, especially in the vicinity of weather fronts, tropical cyclones or when significant late-breaking observations have become available to forecasters. The units are hPa.
Metadata ConstraintsThe authoritative (Point of truth) full version of this metadata record is under copyright, and available from [ http://www.bom.gov.au/metadata/19115/ANZCW0503900200 ]. Licence details about harvesting and derivative versions of the metadata are included there.
PurposeTo show the current mean sea level pressure isobars based on the numerical prediction model, Australian Community Climate Earth-System Simulator (ACCESS-R).
Lines of mean sea level pressure are derived from the netCDF4 file using Geospatial Data Abstraction Library (GDAL) utility gdal_contour. The units are converted from Pa to hPa.