{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:10.018571", "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": "2021-Aug-19_to_2021-Aug-23_27.5_-21.5"}, "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": 2021080002601}, "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": "August 19 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 23 2021"}, "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": 57535.252656222445}, "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", "Zimbabwe"]}, "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": -21.5}, "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": 27.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "27.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 24.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.5, -20.96], [25.82, -20.82], [25.85, -20.75], [25.82, -20.68], [25.47, -20.53], [25.25, -20.0], [25.47, -19.47], [26.0, -19.25], [26.53, -19.47], [26.68, -19.82], [27.0, -19.96], [27.5, -19.75], [27.75, -19.85], [28.0, -19.75], [28.53, -19.97], [28.75, -20.5], [28.53, -21.03], [28.18, -21.18], [28.15, -21.25], [28.25, -21.5], [28.03, -22.03], [27.5, -22.25], [27.25, -22.15], [27.18, -22.18], [27.15, -22.25], [27.25, -22.5], [27.03, -23.03], [26.5, -23.25], [26.25, -23.15], [26.0, -23.25], [25.75, -23.15], [25.5, -23.25], [24.97, -23.03], [24.82, -22.68], [24.47, -22.53], [24.32, -22.18], [23.97, -22.03], [23.75, -21.5], [23.97, -20.97], [24.5, -20.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.25, -21.0], [26.47, -20.47], [27.0, -20.25], [27.25, -20.35], [27.5, -20.25], [28.03, -20.47], [28.25, -21.0], [28.15, -21.25], [28.25, -21.5], [28.03, -22.03], [27.5, -22.25], [27.25, -22.15], [27.0, -22.25], [26.47, -22.03], [26.25, -21.5], [26.35, -21.25], [26.25, -21.0]]]]}, "2021-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.97, -22.03], [23.75, -21.5], [23.97, -20.97], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.5, -20.96], [25.82, -20.82], [25.85, -20.75], [25.75, -20.5], [25.97, -19.97], [26.5, -19.75], [27.0, -19.96], [27.5, -19.75], [27.75, -19.85], [28.0, -19.75], [28.53, -19.97], [28.75, -20.5], [28.53, -21.03], [28.18, -21.18], [28.15, -21.25], [28.25, -21.5], [28.03, -22.03], [27.5, -22.25], [27.25, -22.15], [27.18, -22.18], [27.15, -22.25], [27.25, -22.5], [27.03, -23.03], [26.5, -23.25], [26.25, -23.15], [26.0, -23.25], [25.75, -23.15], [25.5, -23.25], [24.97, -23.03], [24.82, -22.68], [24.47, -22.53], [24.32, -22.18], [23.97, -22.03]]]]}, "2021-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.97, -22.03], [23.75, -21.5], [23.97, -20.97], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.5, -20.96], [25.82, -20.82], [25.85, -20.75], [25.82, -20.68], [25.47, -20.53], [25.25, -20.0], [25.47, -19.47], [26.0, -19.25], [26.53, -19.47], [26.68, -19.82], [27.0, -19.96], [27.5, -19.75], [27.75, -19.85], [28.0, -19.75], [28.53, -19.97], [28.75, -20.5], [28.53, -21.03], [28.18, -21.18], [28.15, -21.25], [28.25, -21.5], [28.03, -22.03], [27.5, -22.25], [27.25, -22.15], [27.18, -22.18], [27.15, -22.25], [27.25, -22.5], [27.03, -23.03], [26.5, -23.25], [26.25, -23.15], [26.0, -23.25], [25.75, -23.15], [25.5, -23.25], [24.97, -23.03], [24.82, -22.68], [24.47, -22.53], [24.32, -22.18], [23.97, -22.03]]]]}, "2021-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.97, -22.03], [23.75, -21.5], [23.97, -20.97], [24.5, -20.75], [24.75, -20.85], [25.0, -20.75], [25.5, -20.96], [25.82, -20.82], [25.85, -20.75], [25.82, 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"description": "Mean t2m anomaly over entire duration", "value": 3.7605239156023975}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.28032034640438, 22.629286139903854, 22.651123146935618, 23.330388277164502, 24.472276901411135]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.842744594178896, 23.63803060066897, 23.941632893660596, 24.449156726793262, 24.472276901411135]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.5320302961263224, 3.722878588249686, 3.5279190158981266, 4.102175122670559, 3.208833465930411]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.1762602147843495, 4.595452560486649, 4.244794044591629, 5.0835647975248435, 3.208833465930411]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3932522521598751, 1.4713496891859947, 1.3651400663369506, 1.5126409495281388, 1.3520691712128734]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6314544486797742, 1.7333471594895644, 1.5950804889851165, 1.7633620554513059, 1.3520691712128734]}}