{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:33.949262", "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": "2026-Apr-24_to_2026-Apr-28_359.5_23.5"}, "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": 2026040002560}, "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 24 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 28 2026"}, "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": "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": 111224.53041578308}, "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": ["Algeria", "Mali"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 23.5}, "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": 359.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "359.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 358.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 361.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.65, 23.25], [-1.75, 23.5], [-1.53, 24.03], [-1.0, 24.25], [-0.75, 24.15], [-0.5, 24.25], [0.03, 24.03], [0.25, 23.5], [0.03, 22.97], [-0.32, 22.82], [-0.35, 22.75], [-0.25, 22.5], [-0.47, 21.97], [-1.0, 21.75], [-1.53, 21.97], [-1.75, 22.5], [-1.65, 22.75], [-1.75, 23.0], [-1.65, 23.25]]]]}, "2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.65, 23.25], [-1.75, 23.5], [-1.53, 24.03], [-1.0, 24.25], [-0.75, 24.15], [-0.5, 24.25], [0.03, 24.03], [0.25, 23.5], [0.03, 22.97], [-0.32, 22.82], [-0.35, 22.75], [-0.25, 22.5], [-0.47, 21.97], [-1.0, 21.75], [-1.53, 21.97], [-1.75, 22.5], [-1.65, 22.75], [-1.75, 23.0], [-1.65, 23.25]]]]}, "2026-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.15, 23.75], [-2.25, 24.0], [-2.15, 24.25], [-2.25, 24.5], [-2.03, 25.03], [-1.5, 25.25], [-1.25, 25.15], [-1.0, 25.25], [-0.47, 25.03], [-0.32, 24.68], [0.0, 24.54], [0.5, 24.75], [1.03, 24.53], [1.18, 24.18], [1.53, 24.03], [1.68, 23.68], [2.03, 23.53], [2.25, 23.0], [2.15, 22.75], [2.25, 22.5], [2.15, 22.25], [2.25, 22.0], [2.15, 21.75], [2.25, 21.5], [2.15, 21.25], [2.25, 21.0], [2.03, 20.47], [1.5, 20.25], [1.25, 20.35], [1.0, 20.25], [0.75, 20.35], [0.5, 20.25], [-0.03, 20.47], [-0.18, 20.82], [-0.25, 20.85], [-0.5, 20.75], [-0.75, 20.85], [-1.0, 20.75], [-1.53, 20.97], [-1.75, 21.5], [-1.65, 21.75], [-1.75, 22.0], [-1.65, 22.25], [-1.68, 22.32], [-2.03, 22.47], [-2.25, 23.0], [-2.15, 23.25], [-2.25, 23.5], [-2.15, 23.75]]]]}, "2026-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.15, 23.75], [-2.25, 24.0], [-2.15, 24.25], [-2.25, 24.5], [-2.03, 25.03], [-1.5, 25.25], [-1.25, 25.15], [-1.0, 25.25], [-0.47, 25.03], [-0.32, 24.68], [0.0, 24.54], [0.5, 24.75], [1.03, 24.53], [1.18, 24.18], [1.53, 24.03], [1.68, 23.68], [2.03, 23.53], [2.25, 23.0], [2.15, 22.75], [2.25, 22.5], [2.15, 22.25], [2.25, 22.0], [2.15, 21.75], [2.25, 21.5], [2.15, 21.25], [2.25, 21.0], [2.03, 20.47], [1.5, 20.25], [1.25, 20.35], [1.0, 20.25], [0.75, 20.35], [0.5, 20.25], [-0.03, 20.47], [-0.18, 20.82], [-0.25, 20.85], [-0.5, 20.75], [-0.75, 20.85], [-1.0, 20.75], [-1.53, 20.97], [-1.75, 21.5], [-1.65, 21.75], [-1.75, 22.0], [-1.65, 22.25], [-1.68, 22.32], [-2.03, 22.47], [-2.25, 23.0], [-2.15, 23.25], [-2.25, 23.5], [-2.15, 23.75]]]]}, "2026-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.15, 23.75], [-2.25, 24.0], [-2.15, 24.25], [-2.25, 24.5], [-2.03, 25.03], [-1.5, 25.25], [-1.25, 25.15], [-1.0, 25.25], [-0.47, 25.03], [-0.32, 24.68], [0.0, 24.54], [0.5, 24.75], [1.03, 24.53], [1.18, 24.18], [1.53, 24.03], [1.68, 23.68], [2.03, 23.53], [2.25, 23.0], [2.15, 22.75], [2.25, 22.5], [2.15, 22.25], [2.25, 22.0], [2.15, 21.75], [2.25, 21.5], [2.15, 21.25], [2.25, 21.0], [2.03, 20.47], [1.5, 20.25], [1.25, 20.35], [1.0, 20.25], [0.75, 20.35], [0.5, 20.25], [-0.03, 20.47], [-0.18, 20.82], [-0.25, 20.85], [-0.5, 20.75], [-0.75, 20.85], [-1.0, 20.75], [-1.53, 20.97], [-1.75, 21.5], [-1.65, 21.75], [-1.75, 22.0], [-1.65, 22.25], [-1.68, 22.32], [-2.03, 22.47], [-2.25, 23.0], [-2.15, 23.25], [-2.25, 23.5], [-2.15, 23.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 5.858772813802716}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.400540536360726}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [33.33366038004556, 33.08574193318685, 34.424037796411824, 34.43257750160677, 34.25420880234037]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [33.582317606608115, 33.49650853474935, 35.070171610514365, 36.113018290201865, 35.481373087565146]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.598087761724656, 4.104952243707373, 4.666999873002249, 4.4657598460599575, 4.070453616936205]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.12045702022607, 4.20801631799236, 5.858772813802716, 5.079451326322783, 4.472086462933362]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4205331028021957, 1.2692481226546306, 1.5173816438394272, 1.492938812843282, 1.3880906073256485]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.563512087805295, 1.2998617971741855, 1.7815509925455149, 1.7827976952826303, 1.581063165343916]}}