{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:03.597860", "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-Aug-19_to_2023-Aug-21_347.0_12.0"}, "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": 2023080001996}, "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": "August 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 21 2023"}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 60330.94874813627}, "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": ["Guinea", "Guinea-Bissau", "Mali", "Senegal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 12.0}, "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": 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": 346.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 350.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-14.0, 13.75], [-13.75, 13.65], [-13.5, 13.75], [-13.25, 13.65], [-13.0, 13.75], [-12.75, 13.65], [-12.5, 13.75], [-12.25, 13.65], [-12.18, 13.68], [-12.03, 14.03], [-11.5, 14.25], [-10.97, 14.03], [-10.82, 13.68], [-10.47, 13.53], [-10.32, 13.18], [-10.25, 13.15], [-10.0, 13.25], [-9.47, 13.03], [-9.25, 12.5], [-9.35, 12.25], [-9.25, 12.0], [-9.47, 11.47], [-10.0, 11.25], [-10.25, 11.35], [-10.5, 11.25], [-11.03, 11.47], [-11.18, 11.82], [-11.53, 11.97], [-11.68, 12.32], [-11.75, 12.35], [-11.82, 12.32], [-11.85, 12.25], [-11.75, 12.0], [-11.97, 11.47], [-12.5, 11.25], [-12.75, 11.35], [-13.0, 11.25], [-13.25, 11.35], [-13.5, 11.25], [-14.03, 11.47], [-14.18, 11.82], [-14.53, 11.97], [-14.75, 12.5], [-14.65, 12.75], [-14.75, 13.0], [-14.53, 13.53], [-14.0, 13.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.75, 13.0], [-14.529999999999973, 13.53], [-14.0, 13.75], [-13.75, 13.65], [-13.5, 13.75], [-13.25, 13.65], [-13.0, 13.75], [-12.75, 13.65], [-12.5, 13.75], [-12.25, 13.65], [-12.180000000000007, 13.68], [-12.029999999999973, 14.03], [-11.5, 14.25], [-10.970000000000027, 14.03], [-10.819999999999993, 13.68], [-10.470000000000027, 13.53], [-10.319999999999993, 13.18], [-10.25, 13.15], [-10.0, 13.25], [-9.470000000000027, 13.03], [-9.25, 12.5], [-9.350000000000023, 12.25], [-9.25, 12.0], [-9.470000000000027, 11.47], [-10.0, 11.25], [-10.25, 11.35], [-10.5, 11.25], [-11.029999999999973, 11.47], [-11.180000000000007, 11.82], [-11.529999999999973, 11.97], [-11.680000000000007, 12.32], [-11.75, 12.35], [-11.819999999999993, 12.32], [-11.850000000000023, 12.25], [-11.75, 12.0], [-11.970000000000027, 11.47], [-12.5, 11.25], [-12.75, 11.35], [-13.0, 11.25], [-13.25, 11.35], [-13.5, 11.25], [-14.029999999999973, 11.47], [-14.180000000000007, 11.82], [-14.529999999999973, 11.97], [-14.75, 12.5], [-14.649999999999977, 12.75], [-14.75, 13.0]]]]}, "2023-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.75, 13.0], [-14.529999999999973, 13.53], [-14.0, 13.75], [-13.75, 13.65], [-13.5, 13.75], [-13.25, 13.65], [-13.0, 13.75], [-12.75, 13.65], [-12.5, 13.75], [-12.25, 13.65], [-12.180000000000007, 13.68], [-12.029999999999973, 14.03], [-11.5, 14.25], [-10.970000000000027, 14.03], [-10.819999999999993, 13.68], [-10.470000000000027, 13.53], [-10.319999999999993, 13.18], [-10.25, 13.15], [-10.0, 13.25], [-9.470000000000027, 13.03], [-9.25, 12.5], [-9.350000000000023, 12.25], [-9.25, 12.0], [-9.470000000000027, 11.47], [-10.0, 11.25], [-10.25, 11.35], [-10.5, 11.25], [-11.029999999999973, 11.47], [-11.180000000000007, 11.82], [-11.529999999999973, 11.97], [-11.680000000000007, 12.32], [-11.75, 12.35], [-11.819999999999993, 12.32], [-11.850000000000023, 12.25], [-11.75, 12.0], [-11.970000000000027, 11.47], [-12.5, 11.25], [-12.75, 11.35], [-13.0, 11.25], [-13.25, 11.35], [-13.5, 11.25], [-14.029999999999973, 11.47], [-14.180000000000007, 11.82], [-14.529999999999973, 11.97], [-14.75, 12.5], [-14.649999999999977, 12.75], [-14.75, 13.0]]]]}, "2023-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.75, 13.0], [-14.529999999999973, 13.53], [-14.0, 13.75], [-13.75, 13.65], [-13.5, 13.75], [-13.25, 13.65], [-13.0, 13.75], [-12.75, 13.65], [-12.5, 13.75], [-12.25, 13.65], [-12.180000000000007, 13.68], [-12.029999999999973, 14.03], [-11.5, 14.25], [-10.970000000000027, 14.03], [-10.819999999999993, 13.68], [-10.470000000000027, 13.53], [-10.319999999999993, 13.18], [-10.25, 13.15], [-10.0, 13.25], [-9.470000000000027, 13.03], [-9.25, 12.5], [-9.350000000000023, 12.25], [-9.25, 12.0], [-9.470000000000027, 11.47], [-10.0, 11.25], [-10.25, 11.35], [-10.5, 11.25], [-11.029999999999973, 11.47], [-11.180000000000007, 11.82], [-11.529999999999973, 11.97], [-11.680000000000007, 12.32], [-11.75, 12.35], [-11.819999999999993, 12.32], [-11.850000000000023, 12.25], [-11.75, 12.0], [-11.970000000000027, 11.47], [-12.5, 11.25], [-12.75, 11.35], [-13.0, 11.25], [-13.25, 11.35], [-13.5, 11.25], [-14.029999999999973, 11.47], [-14.180000000000007, 11.82], [-14.529999999999973, 11.97], [-14.75, 12.5], [-14.649999999999977, 12.75], [-14.75, 13.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 1.9272381231642157}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.5390781302853744}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.545558981576562, 27.537170818979007, 27.513318262775556]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.528663117407177, 28.443387564118552, 28.593439739616713]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.5920943394123583, 1.5247034978322547, 1.5004365536115103]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.9272381231642157, 1.905163836570182, 1.7787647940948546]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.741101009977681, 1.6540892242125689, 1.6268514088922585]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.2111633503865393, 2.1966367215122964, 1.8430255145506178]}}