{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:42.156832", "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-Jan-15_to_2023-Jan-21_21.5_-35.0"}, "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": 2023010002325}, "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": "January 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 21 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 70646.16935466466}, "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": ["South Africa"]}, "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": ["Agulhas Bank", "Atlantic Ocean", "Indian 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": -35.0}, "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": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -36.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -34.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[17.47, -34.47], [18.0, -34.25], [18.25, -34.35], [18.5, -34.25], [18.75, -34.35], [19.0, -34.25], [19.3, -34.37], [19.47, -33.97], [20.0, -33.75], [20.25, -33.85], [20.5, -33.75], [20.75, -33.85], [21.0, -33.75], [21.25, -33.85], [21.5, -33.75], [21.75, -33.85], [22.0, -33.75], [22.53, -33.97], [22.68, -34.32], [23.03, -34.47], [23.25, -35.0], [23.15, -35.25], [23.25, -35.5], [23.03, -36.03], [22.68, -36.18], [22.53, -36.53], [22.0, -36.75], [21.75, -36.65], [21.68, -36.68], [21.53, -37.03], [21.0, -37.25], [20.47, -37.03], [20.32, -36.68], [20.25, -36.65], [20.0, -36.75], [19.47, -36.53], [19.32, -36.18], [19.25, -36.15], [19.0, -36.25], [18.47, -36.03], [18.32, -35.68], [18.25, -35.65], [18.0, -35.75], [17.47, -35.53], [17.25, -35.0], [17.47, -34.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.5, -35.75], [20.97, -35.53], [20.75, -35.0], [20.97, -34.47], [21.5, -34.25], [21.75, -34.35], [22.0, -34.25], [22.25, -34.35], [22.5, -34.25], [23.03, -34.47], [23.25, -35.0], [23.03, -35.53], [22.5, -35.75], [22.25, -35.65], [22.0, -35.75], [21.75, -35.65], [21.5, -35.75]]]]}, "2023-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.0, -35.75], [17.47, -35.53], [17.25, -35.0], [17.47, -34.47], [18.0, -34.25], [18.25, -34.35], [18.5, -34.25], [18.75, -34.35], [19.0, -34.25], [19.5, -34.46], [20.0, -34.25], [20.25, -34.35], [20.32, -34.32], [20.47, -33.97], [21.0, -33.75], [21.25, -33.85], [21.5, -33.75], [21.75, -33.85], [22.0, -33.75], [22.53, -33.97], [22.68, -34.32], [23.03, -34.47], [23.25, -35.0], [23.15, -35.25], [23.25, -35.5], [23.03, -36.03], [22.68, -36.18], [22.53, -36.53], [22.0, -36.75], [21.75, -36.65], [21.68, -36.68], [21.53, -37.03], [21.0, -37.25], [20.47, -37.03], [20.32, -36.68], [20.25, -36.65], [20.0, -36.75], [19.47, -36.53], [19.32, -36.18], [19.25, -36.15], [19.0, -36.25], [18.47, -36.03], [18.32, -35.68], [18.25, -35.65], [18.0, -35.75]]]]}, "2023-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.0, -35.75], [17.47, -35.53], [17.25, -35.0], [17.47, -34.47], [18.0, -34.25], [18.25, -34.35], [18.5, -34.25], [18.75, -34.35], [19.0, -34.25], [19.5, -34.46], [20.0, -34.25], [20.25, -34.35], [20.32, -34.32], [20.47, -33.97], [21.0, -33.75], [21.25, -33.85], [21.5, -33.75], [21.75, -33.85], [22.0, -33.75], [22.53, -33.97], [22.68, -34.32], [23.03, -34.47], [23.25, -35.0], [23.15, -35.25], [23.25, -35.5], [23.03, -36.03], [22.68, -36.18], [22.53, -36.53], [22.0, -36.75], [21.75, -36.65], [21.68, -36.68], [21.53, -37.03], [21.0, -37.25], [20.47, -37.03], [20.32, -36.68], [20.25, -36.65], [20.0, -36.75], [19.47, -36.53], [19.32, -36.18], [19.25, -36.15], [19.0, -36.25], [18.47, -36.03], [18.32, -35.68], [18.25, -35.65], [18.0, -35.75]]]]}, "2023-01-18T11:30:00.000000000": {"type": 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of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.050909807004757, 21.98542116213372, 22.075192154931358, 22.323330647530668, 23.426830915347523, 23.43200427141562, 23.359038395204777]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.101661388061984, 22.611596221611137, 22.646085262065185, 24.264411633211694, 23.558535938582054, 23.811240012076723, 23.45399103470527]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.4449102141963976, 1.7653513994546608, 1.8226404923645352, 1.9633766730910611, 2.1193669274393017, 2.1043741082942518, 2.013244163149409]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [1.5114103434582944, 2.002553815841054, 2.013256812136035, 3.0454387217984618, 2.3301400321904, 2.565425154344439, 2.1948305633633822]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3299869862984235, 1.4777988764421335, 1.575407935044185, 1.642185689065119, 1.4758832539063573, 1.45846775614203, 1.369499309769222]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3783180984826329, 1.7561198841324925, 1.787966814418396, 1.9333762727489754, 1.5045590199116092, 1.6142676097900668, 1.4019943942616742]}}