{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:22.081965", "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-Oct-01_to_2025-Oct-07_19.0_-22.0"}, "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": 2025100000798}, "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": "October 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 07 2025"}, "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": 228676.1938948023}, "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": -22.0}, "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": 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": 21.5}, "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": -19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[18.5, -19.25], [18.75, -19.35], [19.0, -19.25], [19.25, -19.35], [19.5, -19.25], [19.75, -19.35], [20.0, -19.25], [20.53, -19.47], [20.75, -20.0], [20.63, -20.3], [21.03, -20.47], [21.25, -21.0], [21.13, -21.3], [21.53, -21.47], [21.68, -21.82], [22.03, -21.97], [22.25, -22.5], [22.03, -23.03], [21.68, -23.18], [21.53, -23.53], [21.0, -23.75], [20.5, -23.54], [20.18, -23.68], [20.15, -23.75], [20.18, -23.82], [20.25, -23.85], [20.5, -23.75], [21.03, -23.97], [21.25, -24.5], [21.03, -25.03], [20.5, -25.25], [20.25, -25.15], [20.18, -25.18], [20.03, -25.53], [19.5, -25.75], [19.25, -25.65], [19.0, -25.75], [18.75, -25.65], [18.5, -25.75], [18.25, -25.65], [18.0, -25.75], [17.47, -25.53], [17.32, -25.18], [16.97, -25.03], [16.75, -24.5], [16.85, -24.25], [16.82, -24.18], [16.47, -24.03], [16.25, -23.5], [16.35, -23.25], [16.32, -23.18], [15.97, -23.03], [15.75, -22.5], [15.85, -22.25], [15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.85, -21.25], [15.75, -21.0], [15.85, -20.75], [15.75, -20.5], [15.97, -19.97], [16.32, -19.82], [16.47, -19.47], [16.82, -19.32], [16.97, -18.97], [17.5, -18.75], [18.03, -18.97], [18.18, -19.32], [18.25, -19.35], [18.5, -19.25]]]]}}, "IPCC_regions": {"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": {"2025-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.97, -21.47], [17.5, -21.25], [17.75, -21.35], [18.0, -21.25], [18.25, -21.35], [18.5, -21.25], [18.75, -21.35], [19.0, -21.25], [19.53, -21.47], [19.75, -22.0], [19.65, -22.25], [19.75, -22.5], [19.65, -22.75], [19.75, -23.0], [19.53, -23.53], [19.0, -23.75], [18.75, -23.65], [18.5, -23.75], [17.97, -23.53], [17.82, -23.18], [17.75, -23.15], [17.5, -23.25], [17.25, -23.15], [17.0, -23.25], [16.47, -23.03], [16.25, -22.5], [16.47, -21.97], [16.82, -21.82], [16.97, -21.47]]]]}, "2025-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.85, -21.25], [15.75, -21.0], [15.85, -20.75], [15.75, -20.5], [15.97, -19.97], [16.32, -19.82], [16.47, -19.47], [16.82, -19.32], [16.97, -18.97], [17.5, -18.75], [18.03, -18.97], [18.18, -19.32], [18.53, -19.47], [18.75, -20.0], [18.53, -20.53], [18.18, -20.68], [18.15, -20.75], [18.18, -20.82], [18.25, -20.85], [18.5, -20.75], [19.03, -20.97], [19.18, -21.32], [19.25, -21.35], [19.5, -21.25], [20.03, -21.47], [20.25, -22.0], [20.15, -22.25], [20.25, -22.5], [20.15, -22.75], [20.25, -23.0], [20.03, -23.53], [19.5, -23.75], [19.25, -23.65], [19.0, -23.75], [18.75, -23.65], [18.5, -23.75], [17.97, -23.53], [17.82, -23.18], [17.75, -23.15], [17.5, -23.25], [17.25, -23.15], [17.0, -23.25], [16.75, -23.15], [16.5, -23.25], [15.97, -23.03], [15.75, -22.5], [15.85, -22.25], [15.75, -22.0]]]]}, "2025-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.85, -21.25], [15.75, -21.0], [15.85, -20.75], [15.75, -20.5], [15.97, -19.97], [16.32, -19.82], [16.47, -19.47], [16.82, -19.32], [16.97, -18.97], [17.5, -18.75], [18.03, -18.97], [18.18, -19.32], [18.25, -19.35], [18.5, -19.25], [18.75, -19.35], [19.0, -19.25], [19.25, -19.35], [19.5, -19.25], [19.75, -19.35], [20.0, -19.25], [20.53, -19.47], [20.75, -20.0], [20.53, -20.53], [20.18, -20.68], [20.15, -20.75], [20.25, -21.0], [20.15, -21.25], [20.18, -21.32], [20.25, -21.35], [20.5, -21.25], [20.75, -21.35], [21.0, -21.25], [21.53, -21.47], [21.75, -22.0], [21.65, -22.25], [21.75, -22.5], [21.65, -22.75], [21.75, -23.0], [21.53, -23.53], [21.0, -23.75], [20.5, -23.54], [20.18, -23.68], [20.15, -23.75], [20.18, -23.82], [20.25, -23.85], [20.5, -23.75], [21.03, -23.97], [21.25, -24.5], [21.03, -25.03], [20.5, -25.25], [20.25, -25.15], [20.18, -25.18], [20.03, -25.53], [19.5, -25.75], [19.25, -25.65], [19.0, -25.75], [18.75, -25.65], [18.5, -25.75], [18.25, -25.65], [18.0, -25.75], [17.47, -25.53], [17.32, -25.18], [16.97, -25.03], [16.75, -24.5], [16.85, -24.25], [16.82, -24.18], [16.47, -24.03], [16.25, -23.5], [16.35, -23.25], [16.32, -23.18], [15.97, -23.03], [15.75, -22.5], [15.85, -22.25], [15.75, -22.0]]]]}, "2025-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.75, -22.0], [15.85, -21.75], [15.75, -21.5], [15.85, -21.25], [15.75, -21.0], [15.85, -20.75], [15.75, -20.5], [15.97, -19.97], [16.32, -19.82], [16.47, -19.47], [16.82, -19.32], [16.97, -18.97], [17.5, -18.75], [18.03, -18.97], [18.18, -19.32], [18.25, -19.35], [18.5, -19.25], [18.75, -19.35], [19.0, -19.25], [19.25, -19.35], [19.5, -19.25], [19.75, -19.35], [20.0, -19.25], [20.53, -19.47], [20.75, -20.0], [20.54, -20.5], [20.75, -21.0], [20.65, -21.25], [20.68, -21.32], [20.75, -21.35], [21.0, -21.25], [21.53, -21.47], [21.68, -21.82], [22.03, -21.97], [22.25, -22.5], [22.03, -23.03], [21.68, -23.18], [21.53, -23.53], [21.0, -23.75], [20.5, -23.54], [20.18, -23.68], [20.15, -23.75], [20.18, -23.82], [20.25, -23.85], [20.5, -23.75], [21.03, -23.97], [21.25, -24.5], [21.03, -25.03], [20.5, -25.25], [20.25, -25.15], [20.18, -25.18], [20.03, -25.53], [19.5, -25.75], [19.25, -25.65], [19.0, -25.75], [18.75, -25.65], [18.5, -25.75], [18.25, -25.65], [18.0, -25.75], [17.47, -25.53], [17.32, -25.18], [16.97, -25.03], [16.75, -24.5], [16.85, -24.25], [16.82, -24.18], [16.47, -24.03], [16.25, -23.5], [16.35, -23.25], [16.32, -23.18], [15.97, -23.03], [15.75, -22.5], [15.85, -22.25], [15.75, -22.0]]]]}, "2025-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.25, -23.0], [16.35, -22.75], [16.25, -22.5], [16.46, -22.0], [16.25, -21.5], [16.35, -21.25], [16.25, -21.0], [16.35, -20.75], [16.25, -20.5], [16.47, -19.97], [17.0, -19.75], [17.25, -19.85], [17.32, -19.82], [17.47, -19.47], [18.0, -19.25], [18.25, -19.35], [18.5, -19.25], [18.75, -19.35], [19.0, -19.25], [19.25, -19.35], [19.5, -19.25], [19.75, -19.35], [20.0, -19.25], [20.53, -19.47], [20.75, -20.0], [20.63, -20.3], [21.03, -20.47], [21.25, -21.0], [21.13, -21.3], [21.53, -21.47], [21.68, -21.82], [22.03, -21.97], [22.25, -22.5], [22.03, -23.03], [21.68, -23.18], [21.53, -23.53], [21.0, -23.75], [20.5, -23.54], [20.18, -23.68], [20.15, -23.75], [20.18, -23.82], [20.25, -23.85], [20.5, -23.75], [21.03, -23.97], [21.25, -24.5], [21.03, -25.03], [20.5, -25.25], [20.25, -25.15], [20.18, -25.18], [20.03, -25.53], [19.5, -25.75], [19.25, -25.65], [19.0, -25.75], [18.75, -25.65], [18.5, -25.75], [18.25, -25.65], [18.0, -25.75], [17.47, -25.53], [17.32, -25.18], [16.97, -25.03], [16.75, -24.5], [16.85, -24.25], [16.82, -24.18], [16.47, -24.03], [16.25, -23.5], [16.35, -23.25], [16.25, -23.0]]]]}, "2025-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.5, -23.25], [20.97, -23.03], [20.75, -22.5], [20.97, -21.97], [21.5, -21.75], [22.03, -21.97], [22.25, -22.5], [22.03, -23.03], [21.5, -23.25]]], [[[18.75, -21.0], [18.97, -20.47], [19.38, -20.3], [19.25, -20.0], [19.47, -19.47], [20.0, -19.25], [20.53, -19.47], [20.75, -20.0], [20.63, -20.3], [21.03, -20.47], [21.25, -21.0], [21.03, -21.53], [20.68, -21.68], [20.65, -21.75], [20.75, -22.0], [20.53, -22.53], [20.0, -22.75], [19.75, -22.65], [19.5, -22.75], [19.25, -22.65], [19.0, -22.75], [18.47, -22.53], [18.25, -22.0], [18.47, -21.47], [18.82, -21.32], [18.85, -21.25], [18.75, -21.0]]]]}, "2025-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.97, -20.47], [20.5, -20.25], [21.03, -20.47], [21.25, -21.0], [21.03, -21.53], [20.5, -21.75], [19.97, -21.53], [19.75, -21.0], [19.97, -20.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 6.315038365255191}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.911817104331757}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.16526773626157, 25.939754740397177, 27.179431968822826, 27.91037608279464, 27.909925509170762, 27.48922500610354, 28.66106440226241]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.050588226318382, 27.00226491292318, 28.43160781860354, 30.119331614176474, 29.9848457336426, 28.41927871704104, 28.66106440226241]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.5177048604489043, 3.160300372906706, 3.855014848884351, 4.272567081592997, 4.1217884202174115, 2.943470883132079, 2.888809187124764]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.2882134414322195, 4.2015449242978775, 4.956895383279345, 6.315038365255191, 6.179409207818139, 3.2472247641127865, 2.888809187124764]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4344175824958825, 1.433733550130555, 1.5356274518587114, 1.7146573786744344, 1.5875211059954315, 1.1795609611934075, 1.1810245205754617]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6087061153049471, 1.7853514584309216, 2.0515946577395052, 2.265455909276712, 2.277144413212393, 1.2731884867575531, 1.1810245205754617]}}