{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:39.754684", "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": "2022-Mar-14_to_2022-Mar-16_24.5_-28.5"}, "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": 2022030000501}, "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": "March 14 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 16 2022"}, "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": 50907.46287354141}, "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": []}, "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": -28.5}, "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": 24.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 24.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 27.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[23.97, -27.47], [24.5, -27.25], [25.03, -27.47], [25.18, -27.82], [25.53, -27.97], [25.68, -28.32], [26.03, -28.47], [26.25, -29.0], [26.15, -29.25], [26.18, -29.32], [26.25, -29.35], [26.5, -29.25], [26.75, -29.35], [27.0, -29.25], [27.53, -29.47], [27.75, -30.0], [27.65, -30.25], [27.75, -30.5], [27.53, -31.03], [27.18, -31.18], [27.03, -31.53], [26.68, -31.68], [26.53, -32.03], [26.0, -32.25], [25.75, -32.15], [25.5, -32.25], [24.97, -32.03], [24.75, -31.5], [24.85, -31.25], [24.75, -31.0], [24.97, -30.47], [25.32, -30.32], [25.35, -30.25], [25.32, -30.18], [24.97, -30.03], [24.82, -29.68], [24.75, -29.65], [24.5, -29.75], [24.25, -29.65], [24.0, -29.75], [23.47, -29.53], [23.25, -29.0], [23.47, -28.47], [23.82, -28.32], [23.85, -28.25], [23.75, -28.0], [23.97, -27.47]]]]}}, "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": {"2022-03-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.85, -28.25], [23.75, -28.0], [23.97, -27.47], [24.5, -27.25], [25.03, -27.47], [25.18, -27.82], [25.53, -27.97], [25.68, -28.32], [26.03, -28.47], [26.25, -29.0], [26.15, -29.25], [26.18, -29.32], [26.25, -29.35], [26.5, -29.25], [26.75, -29.35], [27.0, -29.25], [27.53, -29.47], [27.75, -30.0], [27.65, -30.25], [27.75, -30.5], [27.53, -31.03], [27.18, -31.18], [27.03, -31.53], [26.68, -31.68], [26.53, -32.03], [26.0, -32.25], [25.75, -32.15], [25.5, -32.25], [24.97, -32.03], [24.75, -31.5], [24.85, -31.25], [24.75, -31.0], [24.97, -30.47], [25.32, -30.32], [25.35, -30.25], [25.32, -30.18], [24.97, -30.03], [24.82, -29.68], [24.75, -29.65], [24.5, -29.75], [24.25, -29.65], [24.0, -29.75], [23.47, -29.53], [23.25, -29.0], [23.47, -28.47], [23.82, -28.32], [23.85, -28.25]]]]}, "2022-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.85, -28.25], [23.75, -28.0], [23.97, -27.47], [24.5, -27.25], [25.03, -27.47], [25.18, -27.82], [25.53, -27.97], [25.68, -28.32], [26.03, -28.47], [26.25, -29.0], [26.15, -29.25], [26.18, -29.32], [26.25, -29.35], [26.5, -29.25], [26.75, -29.35], [27.0, -29.25], [27.53, -29.47], [27.75, -30.0], [27.65, -30.25], [27.75, -30.5], [27.53, -31.03], [27.18, -31.18], [27.03, -31.53], [26.68, -31.68], [26.53, -32.03], [26.0, -32.25], [25.75, -32.15], [25.5, -32.25], [24.97, -32.03], [24.75, -31.5], [24.85, -31.25], [24.75, -31.0], [24.97, -30.47], [25.32, -30.32], [25.35, -30.25], [25.32, -30.18], [24.97, -30.03], [24.82, -29.68], [24.75, -29.65], [24.5, -29.75], [24.25, -29.65], [24.0, -29.75], [23.47, -29.53], [23.25, -29.0], [23.47, -28.47], [23.82, -28.32], [23.85, -28.25]]]]}, "2022-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.85, -28.25], [23.75, -28.0], [23.97, -27.47], [24.5, -27.25], [25.03, -27.47], [25.18, -27.82], [25.53, -27.97], [25.68, -28.32], [26.03, -28.47], [26.25, -29.0], [26.15, -29.25], [26.18, -29.32], [26.25, -29.35], [26.5, -29.25], [26.75, -29.35], [27.0, -29.25], [27.53, -29.47], [27.75, -30.0], [27.65, -30.25], [27.75, -30.5], [27.53, -31.03], [27.18, -31.18], [27.03, -31.53], [26.68, -31.68], [26.53, -32.03], [26.0, -32.25], [25.75, -32.15], [25.5, -32.25], [24.97, -32.03], [24.75, -31.5], [24.85, -31.25], [24.75, -31.0], [24.97, -30.47], [25.32, -30.32], [25.35, -30.25], [25.32, -30.18], [24.97, -30.03], [24.82, -29.68], [24.75, -29.65], [24.5, -29.75], [24.25, -29.65], [24.0, -29.75], [23.47, -29.53], [23.25, -29.0], [23.47, -28.47], [23.82, -28.32], [23.85, -28.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.938721798627398}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.760585401200376}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.987546485096459, 15.502430116025835, 16.32254685291082]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.550445880185293, 12.516923328177484, 13.836033486374276]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.609778935019165, -4.848403370499571, -3.8235738980823903]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.938721798627398, -6.180791250523043, -4.590152774962121]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2306194207417134, -1.8759701729119773, -1.4709990832063387]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.8013404736308765, -2.0887989559076514, -1.6423500227902814]}}