{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:54.945894", "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-08_to_2025-Sep-10_22.5_-18.5"}, "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": 2025090001465}, "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 08 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 10 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 61287.8405067243}, "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": ["Angola", "Botswana", "Namibia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": -18.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[20.75, -20.0], [20.85, -19.75], [20.75, -19.5], [20.97, -18.97], [21.32, -18.82], [21.35, -18.75], [21.25, -18.5], [21.35, -18.25], [21.25, -18.0], [21.35, -17.75], [21.25, -17.5], [21.47, -16.97], [22.0, -16.75], [22.53, -16.97], [22.68, -17.32], [22.75, -17.35], [23.0, -17.25], [23.53, -17.47], [23.68, -17.82], [24.03, -17.97], [24.25, -18.5], [24.03, -19.03], [23.68, -19.18], [23.65, -19.25], [23.75, -19.5], [23.65, -19.75], [23.75, -20.0], [23.53, -20.53], [23.18, -20.68], [23.03, -21.03], [22.5, -21.25], [22.25, -21.15], [22.18, -21.18], [22.03, -21.53], [21.5, -21.75], [20.97, -21.53], [20.75, -21.0], [20.85, -20.75], [20.75, -20.5], [20.85, -20.25], [20.75, -20.0]]]]}}, "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": {"2025-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.75, -20.5], [20.85, -20.25], [20.75, -20.0], [20.85, -19.75], [20.75, -19.5], [20.97, -18.97], [21.32, -18.82], [21.35, -18.75], [21.25, -18.5], [21.35, -18.25], [21.25, -18.0], [21.35, -17.75], [21.25, -17.5], [21.47, -16.97], [22.0, -16.75], [22.53, -16.97], [22.68, -17.32], [22.75, -17.35], [23.0, -17.25], [23.53, -17.47], [23.68, -17.82], [24.03, -17.97], [24.25, -18.5], [24.03, -19.03], [23.68, -19.18], [23.65, -19.25], [23.75, -19.5], [23.65, -19.75], [23.75, -20.0], [23.53, -20.53], [23.18, -20.68], [23.03, -21.03], [22.5, -21.25], [22.25, -21.15], [22.18, -21.18], [22.03, -21.53], [21.5, -21.75], [20.97, -21.53], [20.75, -21.0], [20.85, -20.75], [20.75, -20.5]]]]}, "2025-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.75, -20.5], [20.85, -20.25], [20.75, -20.0], [20.85, -19.75], [20.75, -19.5], [20.97, -18.97], [21.32, -18.82], [21.35, -18.75], [21.25, -18.5], [21.35, -18.25], [21.25, -18.0], [21.35, -17.75], [21.25, -17.5], [21.47, -16.97], [22.0, -16.75], [22.53, -16.97], [22.68, -17.32], [22.75, -17.35], [23.0, -17.25], [23.53, -17.47], [23.68, -17.82], [24.03, -17.97], [24.25, -18.5], [24.03, -19.03], [23.68, -19.18], [23.65, -19.25], [23.75, -19.5], [23.65, -19.75], [23.75, -20.0], [23.53, -20.53], [23.18, -20.68], [23.03, -21.03], [22.5, -21.25], [22.25, -21.15], [22.18, -21.18], [22.03, -21.53], [21.5, -21.75], [20.97, -21.53], [20.75, -21.0], [20.85, -20.75], [20.75, -20.5]]]]}, "2025-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.75, -20.5], [20.85, -20.25], [20.75, -20.0], [20.85, -19.75], [20.75, -19.5], [20.97, -18.97], [21.32, -18.82], [21.35, -18.75], [21.25, -18.5], [21.35, -18.25], [21.25, -18.0], [21.35, -17.75], [21.25, -17.5], [21.47, -16.97], [22.0, -16.75], [22.53, -16.97], [22.68, -17.32], [22.75, -17.35], [23.0, -17.25], [23.53, -17.47], [23.68, -17.82], [24.03, -17.97], [24.25, -18.5], [24.03, -19.03], [23.68, -19.18], [23.65, -19.25], [23.75, -19.5], [23.65, -19.75], [23.75, -20.0], [23.53, -20.53], [23.18, -20.68], [23.03, -21.03], [22.5, -21.25], [22.25, -21.15], [22.18, -21.18], [22.03, -21.53], [21.5, -21.75], [20.97, -21.53], [20.75, -21.0], [20.85, -20.75], [20.75, -20.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 4.674011662807743}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 3.504043502276728}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.547388543023033, 27.103812517438655, 27.244420865982306]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.92737986246749, 28.348499552408896, 28.303406016031943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.1894876632724434, 3.64396491159683, 3.6786779319609115]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.318669676811112, 4.35421253612418, 4.674011662807743]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4094445821905086, 1.5724985127146704, 1.5644447187145185]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9622855059758575, 1.9087962055816174, 2.058680279853964]}}