{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:07.620161", "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": "2023-Nov-23_to_2023-Nov-27_348.0_14.5"}, "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": 2023110000509}, "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 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 27 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 152760.57418896712}, "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": ["Gambia", "Guinea-Bissau", "Mali", "Mauritania", "Senegal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "Africa", "Africa", "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": 14.5}, "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": 348.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "348.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 350.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-16.68, 13.68], [-16.59, 13.89], [-16.54, 14.0], [-16.75, 14.5], [-16.53, 15.03], [-16.0, 15.25], [-15.7, 15.12], [-15.65, 15.25], [-15.75, 15.5], [-15.53, 16.03], [-15.0, 16.25], [-14.75, 16.15], [-14.5, 16.25], [-13.97, 16.03], [-13.82, 15.68], [-13.75, 15.65], [-13.5, 15.75], [-13.25, 15.65], [-13.18, 15.68], [-13.03, 16.03], [-12.5, 16.25], [-12.0, 16.04], [-11.5, 16.25], [-10.97, 16.03], [-10.82, 15.68], [-10.75, 15.65], [-10.68, 15.68], [-10.53, 16.03], [-10.0, 16.25], [-9.75, 16.15], [-9.5, 16.25], [-8.97, 16.03], [-8.75, 15.5], [-8.85, 15.25], [-8.75, 15.0], [-8.97, 14.47], [-9.32, 14.32], [-9.47, 13.97], [-10.0, 13.75], [-10.25, 13.85], [-10.5, 13.75], [-11.0, 13.96], [-11.32, 13.82], [-11.47, 13.47], [-12.0, 13.25], [-12.25, 13.35], [-12.32, 13.32], [-12.47, 12.97], [-13.0, 12.75], [-13.25, 12.85], [-13.5, 12.75], [-13.8, 12.88], [-13.85, 12.75], [-13.75, 12.5], [-13.97, 11.97], [-14.5, 11.75], [-14.75, 11.85], [-15.0, 11.75], [-15.5, 11.96], [-16.0, 11.75], [-16.53, 11.97], [-16.68, 12.32], [-17.03, 12.47], [-17.25, 13.0], [-17.03, 13.53], [-16.68, 13.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.75, 13.0], [-16.649999999999977, 13.25], [-16.75, 13.5], [-16.529999999999973, 14.03], [-16.180000000000007, 14.18], [-16.029999999999973, 14.53], [-15.680000000000007, 14.68], [-15.529999999999973, 15.03], [-15.0, 15.25], [-14.75, 15.15], [-14.5, 15.25], [-14.25, 15.15], [-14.180000000000007, 15.18], [-14.029999999999973, 15.53], [-13.5, 15.75], [-13.25, 15.65], [-13.0, 15.75], [-12.470000000000027, 15.53], [-12.319999999999993, 15.18], [-12.25, 15.15], [-12.120000000000005, 15.2], [-12.25, 15.5], [-12.029999999999973, 16.03], [-11.5, 16.25], [-10.970000000000027, 16.03], [-10.819999999999993, 15.68], [-10.75, 15.65], [-10.680000000000007, 15.68], [-10.529999999999973, 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-2.0820329064158147}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.073024229134376, 25.813445286648914, 25.355246124003997, 25.46998816008005, 26.73524901320644]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.984273829553786, 23.748094069557, 24.301323079890892, 24.459081885941487, 26.73524901320644]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6939389989235014, -1.9609057344990999, -2.354292546546287, -2.192079945290292, -2.1192121865345257]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4134527911273267, -3.355177943488343, -3.2658812187403328, -2.8972194961298783, -2.1192121865345257]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5009810208790308, -1.6686890089543118, -1.9737494545888796, -1.7761662854843336, -1.418315010722738]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.190280531493523, -2.6108453836484657, -2.8064607347182466, -2.361654975457381, -1.418315010722738]}}