{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:44.142019", "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-Aug-02_to_2023-Aug-06_28.5_-24.5"}, "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": 2023080000144}, "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 02 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 06 2023"}, "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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 107500.90918669752}, "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", "South Africa"]}, "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": -24.5}, "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": 28.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "28.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 30.5}, "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": -22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[25.5, -22.75], [25.8, -22.87], [25.85, -22.75], [25.75, -22.5], [25.85, -22.25], [25.75, -22.0], [25.97, -21.47], [26.5, 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"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": {"2023-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.75, -24.5], [27.85, -24.25], [27.75, -24.0], [27.97, -23.47], [28.32, -23.32], [28.47, -22.97], [29.0, -22.75], [29.25, -22.85], [29.32, -22.82], [29.47, -22.47], [30.0, -22.25], [30.25, -22.35], [30.5, -22.25], [31.03, -22.47], [31.25, -23.0], [31.03, -23.53], [30.68, -23.68], [30.53, -24.03], [30.18, -24.18], [30.03, -24.53], [29.68, -24.68], [29.65, -24.75], [29.75, -25.0], [29.53, -25.53], [29.0, -25.75], [28.75, -25.65], [28.5, -25.75], [27.97, -25.53], [27.75, -25.0], [27.85, -24.75], [27.75, -24.5]]]]}, "2023-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.5, -24.75], [24.97, -24.53], [24.75, -24.0], [24.97, -23.47], [25.5, -23.25], [25.75, -23.35], 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12.170570780197693, 13.064652158138472]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.57592541185295, 8.985720188226935, 9.024176182931058, 9.640374051165225, 12.578198857680206]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1721650226423654, -3.1529913740482223, -3.6293269620464597, -3.2504769472908355, -2.8974232419798605]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7309873822944724, -4.189326239414356, -4.315563299450673, -3.9305333219997465, -3.197915006528717]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.486637209083652, -1.5010684910840786, -1.641908395906015, -1.4089518501100493, -1.2404859619875268]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6769150506736994, -1.925558493728988, -1.860327290476747, -1.6545417551904416, -1.338290946595134]}}