{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:47.675678", "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-Apr-16_to_2025-Apr-18_357.0_5.0"}, "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": 2025040001957}, "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": "April 16 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 18 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": "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": 55331.092301179335}, "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": ["C\u00f4te d'Ivoire", "Ghana"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 5.0}, "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": 357.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "357.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 354.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 357.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 7.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-6.75, 6.5], [-6.53, 7.03], [-6.0, 7.25], [-5.75, 7.15], [-5.5, 7.25], [-5.25, 7.15], [-5.18, 7.18], [-5.03, 7.53], [-4.5, 7.75], [-4.25, 7.65], [-4.0, 7.75], [-3.47, 7.53], [-3.32, 7.18], [-2.97, 7.03], [-2.75, 6.5], [-2.96, 6.0], [-2.82, 5.68], [-2.75, 5.65], [-2.5, 5.75], [-1.97, 5.53], [-1.75, 5.0], [-1.97, 4.47], [-2.5, 4.25], [-2.75, 4.35], [-3.0, 4.25], [-3.25, 4.35], [-3.5, 4.25], [-4.03, 4.47], [-4.18, 4.82], [-4.25, 4.85], [-4.5, 4.75], [-4.75, 4.85], [-5.0, 4.75], [-5.53, 4.97], [-5.75, 5.5], [-5.65, 5.75], [-5.68, 5.82], [-5.75, 5.85], [-6.0, 5.75], [-6.53, 5.97], [-6.75, 6.5]]]]}}, "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": {"2025-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.0, 5.75], [-6.529999999999973, 5.97], [-6.75, 6.5], [-6.529999999999973, 7.03], [-6.0, 7.25], [-5.75, 7.15], [-5.5, 7.25], [-5.25, 7.15], [-5.180000000000007, 7.18], [-5.029999999999973, 7.53], [-4.5, 7.75], [-4.25, 7.65], [-4.0, 7.75], [-3.4700000000000273, 7.53], [-3.319999999999993, 7.18], [-2.9700000000000273, 7.03], [-2.75, 6.5], [-2.9599999999999795, 6.0], [-2.819999999999993, 5.68], [-2.75, 5.65], [-2.5, 5.75], [-1.9700000000000273, 5.53], [-1.75, 5.0], [-1.9700000000000273, 4.47], [-2.5, 4.25], [-2.75, 4.35], [-3.0, 4.25], [-3.25, 4.35], [-3.5, 4.25], [-4.029999999999973, 4.47], [-4.180000000000007, 4.82], [-4.25, 4.85], [-4.5, 4.75], [-4.75, 4.85], [-5.0, 4.75], [-5.529999999999973, 4.97], [-5.75, 5.5], [-5.649999999999977, 5.75], [-5.680000000000007, 5.82], [-5.75, 5.85], [-6.0, 5.75]]]]}, "2025-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.0, 5.75], [-6.529999999999973, 5.97], [-6.75, 6.5], [-6.529999999999973, 7.03], [-6.0, 7.25], [-5.75, 7.15], [-5.5, 7.25], [-5.25, 7.15], [-5.180000000000007, 7.18], [-5.029999999999973, 7.53], [-4.5, 7.75], [-4.25, 7.65], [-4.0, 7.75], [-3.4700000000000273, 7.53], [-3.319999999999993, 7.18], [-2.9700000000000273, 7.03], [-2.75, 6.5], [-2.9599999999999795, 6.0], [-2.819999999999993, 5.68], [-2.75, 5.65], [-2.5, 5.75], [-1.9700000000000273, 5.53], [-1.75, 5.0], [-1.9700000000000273, 4.47], [-2.5, 4.25], [-2.75, 4.35], [-3.0, 4.25], [-3.25, 4.35], [-3.5, 4.25], [-4.029999999999973, 4.47], [-4.180000000000007, 4.82], [-4.25, 4.85], [-4.5, 4.75], [-4.75, 4.85], [-5.0, 4.75], [-5.529999999999973, 4.97], [-5.75, 5.5], [-5.649999999999977, 5.75], [-5.680000000000007, 5.82], [-5.75, 5.85], [-6.0, 5.75]]]]}, "2025-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.0, 5.75], [-6.529999999999973, 5.97], [-6.75, 6.5], [-6.529999999999973, 7.03], [-6.0, 7.25], [-5.75, 7.15], [-5.5, 7.25], [-5.25, 7.15], [-5.180000000000007, 7.18], [-5.029999999999973, 7.53], [-4.5, 7.75], [-4.25, 7.65], [-4.0, 7.75], [-3.4700000000000273, 7.53], [-3.319999999999993, 7.18], [-2.9700000000000273, 7.03], [-2.75, 6.5], [-2.9599999999999795, 6.0], [-2.819999999999993, 5.68], [-2.75, 5.65], [-2.5, 5.75], [-1.9700000000000273, 5.53], [-1.75, 5.0], [-1.9700000000000273, 4.47], [-2.5, 4.25], [-2.75, 4.35], [-3.0, 4.25], [-3.25, 4.35], [-3.5, 4.25], [-4.029999999999973, 4.47], [-4.180000000000007, 4.82], [-4.25, 4.85], [-4.5, 4.75], [-4.75, 4.85], [-5.0, 4.75], [-5.529999999999973, 4.97], [-5.75, 5.5], [-5.649999999999977, 5.75], [-5.680000000000007, 5.82], [-5.75, 5.85], [-6.0, 5.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 2.0305636513043623}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.4175184011380795}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.704625278049093, 29.107375505235495, 29.00152076438627]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.84649810791018, 29.998217519124353, 30.08910395304366]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.1860006073922338, 1.5705545652576391, 1.4960000307643655]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.6822427937934776, 1.9637576520777316, 2.0305636513043623]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4530053312787485, 1.911421154350985, 1.8332699788742437]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.7416170553722445, 2.2493717596585214, 2.496181723734119]}}