{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:22.425432", "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-Oct-22_to_2024-Oct-25_347.0_15.5"}, "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": 2024100000433}, "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": "October 22 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 25 2024"}, "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": 53686.54617878774}, "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": ["Mali", "Mauritania", "Senegal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 15.5}, "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": 347.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "347.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 344.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 349.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-12.32, 15.68], [-12.25, 15.65], [-12.0, 15.75], [-11.75, 15.65], [-11.5, 15.75], [-11.25, 15.65], [-11.0, 15.75], [-10.75, 15.65], [-10.5, 15.75], [-9.97, 15.53], [-9.75, 15.0], [-9.97, 14.47], [-10.5, 14.25], [-10.75, 14.35], [-11.0, 14.25], [-11.25, 14.35], [-11.5, 14.25], [-11.75, 14.35], [-12.0, 14.25], [-12.25, 14.35], [-12.5, 14.25], [-12.75, 14.35], [-13.0, 14.25], [-13.25, 14.35], [-13.5, 14.25], [-13.75, 14.35], [-14.0, 14.25], [-14.25, 14.35], [-14.5, 14.25], [-14.75, 14.35], [-15.0, 14.25], [-15.25, 14.35], [-15.5, 14.25], [-16.03, 14.47], [-16.25, 15.0], [-16.15, 15.25], [-16.25, 15.5], [-16.03, 16.03], [-15.5, 16.25], [-15.25, 16.15], [-15.18, 16.18], [-15.03, 16.53], [-14.5, 16.75], [-13.97, 16.53], [-13.82, 16.18], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.47, 16.03], [-12.32, 15.68]]]]}}, "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": {"2024-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.25, 15.5], [-16.029999999999973, 16.03], [-15.5, 16.25], [-15.25, 16.15], [-15.180000000000007, 16.18], [-15.029999999999973, 16.53], [-14.5, 16.75], [-13.970000000000027, 16.53], [-13.819999999999993, 16.18], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.470000000000027, 16.03], [-12.319999999999993, 15.68], [-12.25, 15.65], [-12.0, 15.75], [-11.75, 15.65], [-11.5, 15.75], [-11.25, 15.65], [-11.0, 15.75], [-10.75, 15.65], [-10.5, 15.75], [-9.970000000000027, 15.53], [-9.75, 15.0], [-9.970000000000027, 14.47], [-10.5, 14.25], [-10.75, 14.35], [-11.0, 14.25], [-11.25, 14.35], [-11.5, 14.25], [-11.75, 14.35], [-12.0, 14.25], [-12.25, 14.35], [-12.5, 14.25], [-12.75, 14.35], [-13.0, 14.25], [-13.25, 14.35], [-13.5, 14.25], [-13.75, 14.35], [-14.0, 14.25], [-14.25, 14.35], [-14.5, 14.25], [-14.75, 14.35], [-15.0, 14.25], [-15.25, 14.35], [-15.5, 14.25], [-16.029999999999973, 14.47], [-16.25, 15.0], [-16.149999999999977, 15.25], [-16.25, 15.5]]]]}, "2024-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.25, 15.5], [-16.029999999999973, 16.03], [-15.5, 16.25], [-15.25, 16.15], [-15.180000000000007, 16.18], [-15.029999999999973, 16.53], [-14.5, 16.75], [-13.970000000000027, 16.53], [-13.819999999999993, 16.18], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.470000000000027, 16.03], [-12.319999999999993, 15.68], [-12.25, 15.65], [-12.0, 15.75], [-11.75, 15.65], [-11.5, 15.75], [-11.25, 15.65], [-11.0, 15.75], [-10.75, 15.65], [-10.5, 15.75], [-9.970000000000027, 15.53], [-9.75, 15.0], [-9.970000000000027, 14.47], [-10.5, 14.25], [-10.75, 14.35], [-11.0, 14.25], [-11.25, 14.35], [-11.5, 14.25], [-11.75, 14.35], [-12.0, 14.25], [-12.25, 14.35], [-12.5, 14.25], [-12.75, 14.35], [-13.0, 14.25], [-13.25, 14.35], [-13.5, 14.25], [-13.75, 14.35], [-14.0, 14.25], [-14.25, 14.35], [-14.5, 14.25], [-14.75, 14.35], [-15.0, 14.25], [-15.25, 14.35], [-15.5, 14.25], [-16.029999999999973, 14.47], [-16.25, 15.0], [-16.149999999999977, 15.25], [-16.25, 15.5]]]]}, "2024-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.25, 15.5], [-16.029999999999973, 16.03], [-15.5, 16.25], [-15.25, 16.15], [-15.180000000000007, 16.18], [-15.029999999999973, 16.53], [-14.5, 16.75], [-13.970000000000027, 16.53], [-13.819999999999993, 16.18], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.470000000000027, 16.03], [-12.319999999999993, 15.68], [-12.25, 15.65], [-12.0, 15.75], [-11.75, 15.65], [-11.5, 15.75], [-11.25, 15.65], [-11.0, 15.75], [-10.75, 15.65], [-10.5, 15.75], [-9.970000000000027, 15.53], [-9.75, 15.0], [-9.970000000000027, 14.47], [-10.5, 14.25], [-10.75, 14.35], [-11.0, 14.25], [-11.25, 14.35], [-11.5, 14.25], [-11.75, 14.35], [-12.0, 14.25], [-12.25, 14.35], [-12.5, 14.25], [-12.75, 14.35], [-13.0, 14.25], [-13.25, 14.35], [-13.5, 14.25], [-13.75, 14.35], [-14.0, 14.25], [-14.25, 14.35], [-14.5, 14.25], [-14.75, 14.35], [-15.0, 14.25], [-15.25, 14.35], [-15.5, 14.25], [-16.029999999999973, 14.47], [-16.25, 15.0], [-16.149999999999977, 15.25], [-16.25, 15.5]]]]}, "2024-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.529999999999973, 16.03], [-13.0, 16.25], [-12.470000000000027, 16.03], [-12.25, 15.5], [-12.350000000000023, 15.25], [-12.25, 15.0], [-12.470000000000027, 14.47], [-13.0, 14.25], [-13.5, 14.46], [-14.0, 14.25], [-14.529999999999973, 14.47], [-14.75, 15.0], [-14.529999999999973, 15.53], [-14.0, 15.75], [-13.699999999999989, 15.62], [-13.529999999999973, 16.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.21429753530083}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6398592635545857}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.054746528908026, 27.474771683304425, 28.56010208129885, 29.377781168619833]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.44889348347982, 26.32629801432296, 27.509158070882165, 29.164646402994833]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6948412655263656, -3.2448191723163244, -2.1380464605880056, -1.6910846169529539]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5649701001846665, -4.21429753530083, -2.72909562869944, -1.7673960128488488]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9799853141821973, -2.4523101745246803, -1.6557671794251327, -1.3253187140104348]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4489984677489045, -3.0267926679653767, -2.1563848407446033, -1.3716193843230646]}}