{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:33.656530", "data_source": "ERA5", "website": "http://wexa.jamstec.go.jp", "Author": "Patrick Martineau"}, "event_id": {"name": "Event ID", "description": "A unique identifier based on: beginning_date, end_date, longitude, and latitude", "value": "2024-Aug-28_to_2024-Aug-30_23.0_-33.5"}, "event_label": {"name": "Event label", "description": "Integer-valued grid identifier that uniquely labels each detected extreme event in space and time, consistent with the corresponding labels stored in the NetCDF dataset.", "value": 2024080000713}, "status": {"name": "Status", "description": "An ongoing event denotes an event that lasts up to the latest data available. These events are subject to change as newer data is added.", "value": false}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 28 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 30 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "figures_available": {"name": "Figures available", "description": "True if figures were pre-generated for this event", "value": true}, "detection_var": {"name": "Detection variable", "description": "Variable used for the detection scheme", "value": "t2m"}, "event_type": {"name": "Event type", "description": "Type of the event detected", "value": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 57202.468330856194}, "countries_affected": {"name": "Countries affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the countries affected by an event during its lifetime.", "value": ["South Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "oceans_affected": {"name": "Ocean basins affected", "description": "The ArcGIS geocoding API (https://developers.arcgis.com/rest/geocode/) is used to obtain a list of all the ocean basins affected by an event during its lifetime.", "value": ["Indian Ocean"]}, "center_lat": {"name": "Center latitude", "description": "Latitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": -33.5}, "center_lon": {"name": "Center longitude", "description": "Longitude of the maximum time-integrated standardized t2m anomalies. Only t2m of the same polarity as the events are considered (positive T2m for a HW, for instance). The centre is thus representative of both the severity and persistence of anomalies.", "value": 23.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 26.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -31.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.47, -31.97], [23.0, -31.75], [23.25, -31.85], [23.5, -31.75], [23.75, -31.85], [23.82, -31.82], [23.85, -31.75], [23.75, -31.5], [23.97, -30.97], [24.5, -30.75], [24.75, -30.85], [24.82, -30.82], [24.97, -30.47], [25.5, -30.25], [26.03, -30.47], [26.18, -30.82], [26.53, -30.97], [26.75, -31.5], [26.53, -32.03], [26.13, -32.2], [26.25, -32.5], [26.04, -33.0], [26.25, -33.5], [26.03, -34.03], [25.5, -34.25], [25.25, -34.15], [25.18, -34.18], [25.03, -34.53], [24.5, -34.75], [23.97, -34.53], [23.82, -34.18], [23.75, -34.15], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.75, -34.15], [22.5, -34.25], [21.97, -34.03], [21.75, -33.5], [21.97, -32.97], [22.32, -32.82], [22.35, -32.75], [22.25, -32.5], [22.47, -31.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.35, -32.75], [22.25, -32.5], [22.47, -31.97], [23.0, -31.75], [23.25, -31.85], [23.5, -31.75], [23.75, -31.85], [23.82, -31.82], [23.85, -31.75], [23.75, -31.5], [23.97, -30.97], [24.5, -30.75], [24.75, -30.85], [24.82, -30.82], [24.97, -30.47], [25.5, -30.25], [26.03, -30.47], [26.18, -30.82], [26.53, -30.97], [26.75, -31.5], [26.53, -32.03], [26.13, -32.2], [26.25, -32.5], [26.04, -33.0], [26.25, -33.5], [26.03, -34.03], [25.5, -34.25], [25.25, -34.15], [25.18, -34.18], [25.03, -34.53], [24.5, -34.75], [23.97, -34.53], [23.82, -34.18], [23.75, -34.15], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.75, -34.15], [22.5, -34.25], [21.97, -34.03], [21.75, -33.5], [21.97, -32.97], [22.32, -32.82], [22.35, -32.75]]]]}, "2024-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.35, -32.75], [22.25, -32.5], [22.47, -31.97], [23.0, -31.75], [23.25, -31.85], [23.5, -31.75], [23.75, -31.85], [23.82, -31.82], [23.85, -31.75], [23.75, -31.5], [23.97, -30.97], [24.5, -30.75], [24.75, -30.85], [24.82, -30.82], [24.97, -30.47], [25.5, -30.25], [26.03, -30.47], [26.18, -30.82], [26.53, -30.97], [26.75, -31.5], [26.53, -32.03], [26.13, -32.2], [26.25, -32.5], [26.04, -33.0], [26.25, -33.5], [26.03, -34.03], [25.5, -34.25], [25.25, -34.15], [25.18, -34.18], [25.03, -34.53], [24.5, -34.75], [23.97, -34.53], [23.82, -34.18], [23.75, -34.15], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.75, -34.15], [22.5, -34.25], [21.97, -34.03], [21.75, -33.5], [21.97, -32.97], [22.32, -32.82], [22.35, -32.75]]]]}, "2024-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.35, -32.75], [22.25, -32.5], [22.47, -31.97], [23.0, -31.75], [23.25, -31.85], [23.5, -31.75], [23.75, -31.85], [23.82, -31.82], [23.85, -31.75], [23.75, -31.5], [23.97, -30.97], [24.5, -30.75], [24.75, -30.85], [24.82, -30.82], [24.97, -30.47], [25.5, -30.25], [26.03, -30.47], [26.18, -30.82], [26.53, -30.97], [26.75, -31.5], [26.53, -32.03], [26.13, -32.2], [26.25, -32.5], [26.04, -33.0], [26.25, -33.5], [26.03, -34.03], [25.5, -34.25], [25.25, -34.15], [25.18, -34.18], [25.03, -34.53], [24.5, -34.75], [23.97, -34.53], [23.82, -34.18], [23.75, -34.15], [23.5, -34.25], [23.25, -34.15], [23.0, -34.25], [22.75, -34.15], [22.5, -34.25], [21.97, -34.03], [21.75, -33.5], [21.97, -32.97], [22.32, -32.82], [22.35, -32.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.357029749192975}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.012992023129943}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.129009795206059, 5.418668373022967, 8.681487743339233]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.2184485292012255, 1.911242736434474, 5.987826209389766]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.754304219933446, -7.638079258084577, -4.646592591371806]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.138301982184771, -9.357029749192975, -5.630863378202889]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6725105629514976, -2.2403739109196414, -1.3801575895725267]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2198966589330715, -2.618462186837949, -1.54614707133272]}}