{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:29.144996", "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-Dec-03_to_2025-Dec-11_349.0_7.5"}, "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": 2025120001351}, "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": "December 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 11 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 61233.29898589694}, "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": ["Liberia", "Sierra Leone"]}, "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": ["Atlantic Ocean"]}, "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": 7.5}, "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": 349.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "349.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 345.5}, "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": 7.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-15.25, 8.0], [-15.03, 8.53], [-14.5, 8.75], [-14.25, 8.65], [-14.18, 8.68], [-14.03, 9.03], [-13.5, 9.25], [-13.25, 9.15], [-13.0, 9.25], [-12.75, 9.15], [-12.5, 9.25], [-11.97, 9.03], [-11.82, 8.68], [-11.75, 8.65], [-11.68, 8.68], [-11.53, 9.03], [-11.0, 9.25], [-10.47, 9.03], [-10.32, 8.68], [-9.97, 8.53], [-9.75, 8.0], [-9.85, 7.75], [-9.75, 7.5], [-9.97, 6.97], [-10.32, 6.82], [-10.47, 6.47], [-11.0, 6.25], [-11.53, 6.47], [-11.7, 6.88], [-12.0, 6.75], [-12.5, 6.96], [-13.0, 6.75], [-13.25, 6.85], [-13.5, 6.75], [-14.0, 6.96], [-14.5, 6.75], [-15.03, 6.97], [-15.25, 7.5], [-15.15, 7.75], [-15.25, 8.0]]]]}}, "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": {"2025-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.25, 8.5], [-14.029999999999973, 9.03], [-13.5, 9.25], [-12.970000000000027, 9.03], [-12.75, 8.5], [-12.850000000000023, 8.25], [-12.75, 8.0], [-12.970000000000027, 7.47], [-13.5, 7.25], [-14.029999999999973, 7.47], [-14.25, 8.0], [-14.149999999999977, 8.25], [-14.25, 8.5]]]]}, "2025-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.25, 8.5], [-14.029999999999973, 9.03], [-13.5, 9.25], [-12.970000000000027, 9.03], [-12.75, 8.5], [-12.850000000000023, 8.25], [-12.75, 8.0], [-12.970000000000027, 7.47], [-13.5, 7.25], [-14.029999999999973, 7.47], [-14.25, 8.0], [-14.149999999999977, 8.25], [-14.25, 8.5]]]]}, "2025-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.25, 8.5], [-14.029999999999973, 9.03], [-13.5, 9.25], [-13.25, 9.15], [-13.0, 9.25], [-12.75, 9.15], [-12.5, 9.25], [-11.970000000000027, 9.03], [-11.819999999999993, 8.68], [-11.75, 8.65], [-11.680000000000007, 8.68], [-11.529999999999973, 9.03], [-11.0, 9.25], [-10.470000000000027, 9.03], [-10.319999999999993, 8.68], [-9.970000000000027, 8.53], [-9.75, 8.0], [-9.850000000000023, 7.75], [-9.75, 7.5], [-9.970000000000027, 6.97], [-10.319999999999993, 6.82], [-10.470000000000027, 6.47], [-11.0, 6.25], [-11.529999999999973, 6.47], [-11.699999999999989, 6.88], [-12.0, 6.75], [-12.529999999999973, 6.97], [-12.680000000000007, 7.32], [-13.0, 7.46], [-13.5, 7.25], [-14.029999999999973, 7.47], [-14.25, 8.0], [-14.149999999999977, 8.25], [-14.25, 8.5]]]]}, "2025-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 6.75], [-15.029999999999973, 6.97], [-15.25, 7.5], [-15.029999999999973, 8.03], [-14.5, 8.25], [-13.970000000000027, 8.03], [-13.75, 7.5], [-13.970000000000027, 6.97], [-14.5, 6.75]]], [[[-13.75, 8.5], [-13.529999999999973, 9.03], [-13.0, 9.25], [-12.75, 9.15], [-12.5, 9.25], [-11.970000000000027, 9.03], [-11.819999999999993, 8.68], [-11.75, 8.65], [-11.680000000000007, 8.68], [-11.529999999999973, 9.03], [-11.0, 9.25], [-10.470000000000027, 9.03], [-10.319999999999993, 8.68], [-9.970000000000027, 8.53], [-9.75, 8.0], [-9.850000000000023, 7.75], [-9.75, 7.5], [-9.970000000000027, 6.97], [-10.319999999999993, 6.82], [-10.470000000000027, 6.47], [-11.0, 6.25], [-11.529999999999973, 6.47], [-11.699999999999989, 6.88], [-12.0, 6.75], [-12.529999999999973, 6.97], [-12.680000000000007, 7.32], [-13.029999999999973, 7.47], [-13.180000000000007, 7.82], [-13.529999999999973, 7.97], [-13.75, 8.5]]]]}, "2025-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.25, 8.0], [-15.029999999999973, 8.53], [-14.5, 8.75], [-14.25, 8.65], [-14.0, 8.75], [-13.75, 8.65], [-13.680000000000007, 8.68], [-13.529999999999973, 9.03], [-13.0, 9.25], [-12.75, 9.15], [-12.5, 9.25], [-11.970000000000027, 9.03], [-11.819999999999993, 8.68], [-11.75, 8.65], [-11.680000000000007, 8.68], [-11.529999999999973, 9.03], [-11.0, 9.25], [-10.470000000000027, 9.03], [-10.319999999999993, 8.68], [-9.970000000000027, 8.53], [-9.75, 8.0], [-9.850000000000023, 7.75], [-9.75, 7.5], [-9.970000000000027, 6.97], [-10.319999999999993, 6.82], [-10.470000000000027, 6.47], [-11.0, 6.25], [-11.529999999999973, 6.47], [-11.699999999999989, 6.88], [-12.0, 6.75], [-12.5, 6.96], [-13.0, 6.75], [-13.25, 6.85], [-13.5, 6.75], [-14.0, 6.96], [-14.5, 6.75], [-15.029999999999973, 6.97], [-15.25, 7.5], [-15.149999999999977, 7.75], [-15.25, 8.0]]]]}, "2025-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.25, 8.0], [-15.029999999999973, 8.53], [-14.5, 8.75], [-14.25, 8.65], [-14.0, 8.75], [-13.75, 8.65], [-13.5, 8.75], [-13.25, 8.65], [-13.0, 8.75], [-12.470000000000027, 8.53], [-12.300000000000011, 8.12], [-12.0, 8.25], [-11.5, 8.04], [-11.0, 8.25], [-10.470000000000027, 8.03], [-10.25, 7.5], [-10.350000000000023, 7.25], [-10.25, 7.0], [-10.470000000000027, 6.47], [-11.0, 6.25], [-11.529999999999973, 6.47], [-11.699999999999989, 6.88], [-12.0, 6.75], [-12.5, 6.96], [-13.0, 6.75], [-13.25, 6.85], [-13.5, 6.75], [-14.0, 6.96], [-14.5, 6.75], [-15.029999999999973, 6.97], [-15.25, 7.5], [-15.149999999999977, 7.75], [-15.25, 8.0]]]]}, "2025-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.5, 7.25], [-15.029999999999973, 7.47], [-15.25, 8.0], [-15.029999999999973, 8.53], [-14.5, 8.75], [-14.25, 8.65], [-14.0, 8.75], [-13.75, 8.65], [-13.5, 8.75], [-13.25, 8.65], [-13.0, 8.75], [-12.470000000000027, 8.53], [-12.300000000000011, 8.12], [-12.0, 8.25], [-11.5, 8.04], [-11.180000000000007, 8.18], [-11.029999999999973, 8.53], [-10.5, 8.75], [-9.970000000000027, 8.53], [-9.75, 8.0], [-9.970000000000027, 7.47], [-10.319999999999993, 7.32], [-10.470000000000027, 6.97], [-11.0, 6.75], [-11.5, 6.96], [-12.0, 6.75], [-12.5, 6.96], [-13.0, 6.75], [-13.25, 6.85], [-13.5, 6.75], [-14.029999999999973, 6.97], [-14.180000000000007, 7.32], [-14.25, 7.35], [-14.5, 7.25]]]]}, "2025-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.0, 6.75], [-12.529999999999973, 6.97], [-12.75, 7.5], [-12.529999999999973, 8.03], [-12.0, 8.25], [-11.5, 8.04], [-11.180000000000007, 8.18], [-11.029999999999973, 8.53], [-10.5, 8.75], [-9.970000000000027, 8.53], [-9.75, 8.0], [-9.970000000000027, 7.47], [-10.319999999999993, 7.32], [-10.470000000000027, 6.97], [-11.0, 6.75], [-11.5, 6.96], [-12.0, 6.75]]]]}, "2025-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-11.029999999999973, 8.53], [-10.5, 8.75], [-9.970000000000027, 8.53], [-9.75, 8.0], [-9.970000000000027, 7.47], [-10.5, 7.25], [-11.029999999999973, 7.47], [-11.25, 8.0], [-11.029999999999973, 8.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 1.5241832717098873}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 1.0362466594726087}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.11693979899087, 28.171758270263695, 26.798099045526442, 26.54058364476913, 27.15838487859361, 27.64952418009443, 27.381045277913415, 25.958437008327905, 25.441267903645837]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.12031707763674, 28.20451380411788, 28.08435974121096, 28.09381256103518, 28.302012379964196, 28.314229583740257, 28.203555043538415, 26.489985402425134, 25.441267903645837]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [0.7945532543298555, 0.8222638000783604, 1.196396746822521, 1.0723720332763684, 1.1182436207239868, 0.957587637370176, 0.8140330440503729, 0.9207917559227591, 0.8108033128967804]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [0.8675992481829553, 0.9269474697761098, 1.5241832717098873, 1.4367511144353102, 1.4275909342072168, 1.1696005368157785, 0.8994191833209015, 1.024362008163962, 0.8108033128967804]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4022443190915075, 1.4321775178111267, 1.7434510980788738, 1.5686650568627145, 1.7221382686091218, 1.5792185708709332, 1.38461863447454, 1.4717904934799753, 1.2327074134226594]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.532197963655739, 1.6127719844634387, 2.253557628790397, 2.0440994468193066, 2.150629992271561, 1.9891563925189624, 1.5603931377440943, 1.6502370577138845, 1.2327074134226594]}}