{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:46.495849", "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": "2025-Nov-14_to_2025-Nov-16_17.0_-24.0"}, "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": 2025110000400}, "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": "November 14 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 16 2025"}, "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": 51275.238000583726}, "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": ["Namibia"]}, "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": -24.0}, "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": 17.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 16.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[15.47, -22.47], [15.82, -22.32], [15.85, -22.25], [15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.97, -20.97], [16.5, -20.75], [16.75, -20.85], [17.0, -20.75], [17.53, -20.97], [17.75, -21.5], [17.65, -21.75], [17.68, -21.82], [17.75, -21.85], [18.0, -21.75], [18.53, -21.97], [18.68, -22.32], [19.03, -22.47], [19.25, -23.0], [19.03, -23.53], [18.68, -23.68], [18.53, -24.03], [18.0, -24.25], [17.7, -24.12], [17.53, -24.53], [17.0, -24.75], [16.75, -24.65], [16.5, -24.75], [15.97, -24.53], [15.75, -24.0], [15.85, -23.75], [15.82, -23.68], [15.47, -23.53], [15.25, -23.0], [15.47, -22.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, -23.53], [15.25, -23.0], [15.47, -22.47], [15.82, -22.32], [15.85, -22.25], [15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.97, -20.97], [16.5, -20.75], [16.75, -20.85], [17.0, -20.75], [17.53, -20.97], [17.75, -21.5], [17.65, -21.75], [17.68, -21.82], [17.75, -21.85], [18.0, -21.75], [18.53, -21.97], [18.68, -22.32], [19.03, -22.47], [19.25, -23.0], [19.03, -23.53], [18.68, -23.68], [18.53, -24.03], [18.0, -24.25], [17.7, -24.12], [17.53, -24.53], [17.0, -24.75], [16.75, -24.65], [16.5, -24.75], [15.97, -24.53], [15.75, -24.0], [15.85, -23.75], [15.82, -23.68], [15.47, -23.53]]]]}, "2025-11-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, -23.53], [15.25, -23.0], [15.47, -22.47], [15.82, -22.32], [15.85, -22.25], [15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.97, -20.97], [16.5, -20.75], [16.75, -20.85], [17.0, -20.75], [17.53, -20.97], [17.75, -21.5], [17.65, -21.75], [17.68, -21.82], [17.75, -21.85], [18.0, -21.75], [18.53, -21.97], [18.68, -22.32], [19.03, -22.47], [19.25, -23.0], [19.03, -23.53], [18.68, -23.68], [18.53, -24.03], [18.0, -24.25], [17.7, -24.12], [17.53, -24.53], [17.0, -24.75], [16.75, -24.65], [16.5, -24.75], [15.97, -24.53], [15.75, -24.0], [15.85, -23.75], [15.82, -23.68], [15.47, -23.53]]]]}, "2025-11-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, -23.53], [15.25, -23.0], [15.47, -22.47], [15.82, -22.32], [15.85, -22.25], [15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.97, -20.97], [16.5, -20.75], [16.75, -20.85], [17.0, -20.75], [17.53, -20.97], [17.75, -21.5], [17.65, -21.75], [17.68, -21.82], [17.75, -21.85], [18.0, -21.75], [18.53, -21.97], [18.68, -22.32], [19.03, -22.47], [19.25, -23.0], [19.03, -23.53], [18.68, -23.68], [18.53, -24.03], [18.0, -24.25], [17.7, -24.12], [17.53, -24.53], [17.0, -24.75], [16.75, -24.65], [16.5, -24.75], [15.97, -24.53], [15.75, -24.0], [15.85, -23.75], [15.82, -23.68], [15.47, -23.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.945528269920828}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.324264861738635}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.05575247870553, 19.43096737331814, 20.06158797652631]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.57273381551107, 16.80573679606124, 17.96331685384115]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.237213280006908, -4.727356048576114, -4.0082252566328815]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.508042870970996, -5.945528269920828, -4.620626138630541]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6032324059783094, -1.7381470322380665, -1.4403920821540253]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0405755183924104, -2.1724410383541475, -1.6657512195002655]}}