{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:59.312365", "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-Sep-18_to_2025-Sep-22_19.0_-22.5"}, "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": 2025090002087}, "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": "September 18 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 22 2025"}, "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": 167647.4911563126}, "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": ["Botswana", "Namibia"]}, "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": -22.5}, "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": 19.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 16.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[16.32, -20.82], [16.47, -20.47], [17.0, -20.25], [17.53, -20.47], [17.68, -20.82], [17.75, -20.85], [18.0, -20.75], [18.5, 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{"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.97, -22.03], [15.75, -21.5], [15.97, -20.97], [16.5, -20.75], [16.75, -20.85], [17.0, -20.75], [17.25, -20.85], [17.5, -20.75], [17.75, -20.85], [18.0, -20.75], [18.53, -20.97], [18.75, -21.5], [18.63, -21.8], [18.75, -21.85], [19.0, -21.75], [19.53, -21.97], [19.75, -22.5], [19.53, -23.03], [19.0, -23.25], [18.75, -23.15], [18.5, -23.25], [18.25, -23.15], [18.18, -23.18], [18.03, -23.53], [17.5, -23.75], [17.25, -23.65], [17.0, -23.75], [16.47, -23.53], [16.25, -23.0], [16.46, -22.5], [16.32, -22.18], [15.97, -22.03]]]]}, "2025-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.97, -22.03], [15.75, -21.5], [15.97, -20.97], [16.32, -20.82], 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"description": "The daily evolution of mean t2m.", "value": [24.421498446994406, 26.363181891145075, 26.83930257592499, 26.426025281633656, 24.68287811279299]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.323096211751306, 28.10976943969729, 28.50096918741866, 28.505516306559286, 24.68287811279299]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.3252862672205197, 4.932565433569741, 5.413700327472009, 4.835763461837247, 3.136488735481805]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.7955885201831165, 5.878127878569103, 7.44782545546019, 7.148341094468435, 3.136488735481805]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.0891571017103236, 1.4200348448456115, 1.502678119507846, 1.3327918365585436, 1.0984652324225228]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.1853918046250793, 1.807395380175811, 1.7599291905441068, 1.7264156505537616, 1.0984652324225228]}}