{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:53.569994", "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-Sep-20_to_2025-Sep-23_30.5_15.0"}, "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": 2025090000442}, "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": "September 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 23 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 56820.19644339601}, "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": ["Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa", "Sahara"]}, "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": 15.0}, "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": 30.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "30.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, 13.97], [27.75, 14.5], [27.97, 15.03], [28.5, 15.25], [28.75, 15.15], [29.0, 15.25], [29.53, 15.03], [29.68, 14.68], [30.03, 14.53], [30.25, 14.0], [30.15, 13.75], [30.25, 13.5], [30.03, 12.97], [29.68, 12.82], [29.53, 12.47], [29.0, 12.25], [28.47, 12.47], [28.25, 13.0], [28.47, 13.53], [28.82, 13.68], [28.85, 13.75], [28.82, 13.82], [28.75, 13.85], [28.5, 13.75], [27.97, 13.97]]]]}, "2025-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, 15.03], [28.32, 15.18], [28.47, 15.53], [29.0, 15.75], [29.25, 15.65], [29.5, 15.75], [29.75, 15.65], [29.82, 15.68], [29.85, 15.75], [29.75, 16.0], [29.97, 16.53], [30.5, 16.75], [30.75, 16.65], [31.0, 16.75], [31.53, 16.53], [31.75, 16.0], [31.65, 15.75], [31.75, 15.5], [31.65, 15.25], [31.75, 15.0], [31.53, 14.47], [31.0, 14.25], [30.75, 14.35], [30.68, 14.32], [30.65, 14.25], [30.75, 14.0], [30.65, 13.75], [30.75, 13.5], [30.53, 12.97], [30.0, 12.75], [29.75, 12.85], [29.68, 12.82], [29.53, 12.47], [29.0, 12.25], [28.47, 12.47], [28.25, 13.0], [28.38, 13.3], [27.97, 13.47], [27.75, 14.0], [27.85, 14.25], [27.75, 14.5], [27.97, 15.03]]]]}, "2025-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, 15.03], [28.32, 15.18], [28.47, 15.53], [29.0, 15.75], [29.25, 15.65], [29.5, 15.75], [29.75, 15.65], [29.82, 15.68], [29.85, 15.75], [29.75, 16.0], [29.97, 16.53], [30.5, 16.75], [30.75, 16.65], [31.0, 16.75], [31.53, 16.53], [31.75, 16.0], [31.65, 15.75], [31.75, 15.5], [31.65, 15.25], [31.75, 15.0], [31.53, 14.47], [31.0, 14.25], [30.75, 14.35], [30.68, 14.32], [30.65, 14.25], [30.75, 14.0], [30.65, 13.75], [30.75, 13.5], [30.53, 12.97], [30.0, 12.75], [29.75, 12.85], [29.68, 12.82], [29.53, 12.47], [29.0, 12.25], [28.47, 12.47], [28.25, 13.0], [28.38, 13.3], [27.97, 13.47], [27.75, 14.0], [27.85, 14.25], [27.75, 14.5], [27.97, 15.03]]]]}, "2025-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.97, 15.03], [28.32, 15.18], [28.47, 15.53], [29.0, 15.75], [29.25, 15.65], [29.5, 15.75], [29.75, 15.65], [29.82, 15.68], [29.85, 15.75], [29.75, 16.0], [29.97, 16.53], [30.5, 16.75], [30.75, 16.65], [31.0, 16.75], [31.53, 16.53], [31.75, 16.0], [31.65, 15.75], [31.75, 15.5], [31.65, 15.25], [31.75, 15.0], [31.53, 14.47], [31.0, 14.25], [30.75, 14.35], [30.68, 14.32], [30.65, 14.25], [30.75, 14.0], [30.65, 13.75], [30.75, 13.5], [30.53, 12.97], [30.0, 12.75], [29.75, 12.85], [29.68, 12.82], [29.53, 12.47], [29.0, 12.25], [28.47, 12.47], [28.25, 13.0], [28.38, 13.3], [27.97, 13.47], [27.75, 14.0], [27.85, 14.25], [27.75, 14.5], [27.97, 15.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.109056810343418}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.436175263782711}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.739836374918696, 28.7987591793663, 28.107768463670197, 28.10261132758967]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.31493403116866, 25.9169746398926, 25.676937357584677, 25.616775767008505]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.040220898380869, -1.95800813238152, -2.6946334784154886, -2.7600826977621353]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4610128963061584, -2.328380629356843, -3.9105622010991965, -4.109056810343418]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6498774603782693, -1.5508587358001085, -2.13684300932925, -2.2283143080023593]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9806724678846586, -1.776927036453656, -2.9869097336880976, -3.249123317458823]}}