{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:29.099423", "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": "2026-Apr-22_to_2026-Apr-25_26.0_-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": 2026040000656}, "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": "April 22 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 60812.596118951966}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "W.Southern-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": []}, "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": 26.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 26.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, -18.47], [22.0, -18.25], [22.25, -18.35], [22.5, -18.25], [23.03, -18.47], [23.18, -18.82], [23.25, -18.85], [23.5, -18.75], [24.03, -18.97], [24.18, -19.32], [24.53, -19.47], [24.75, -20.0], [24.65, -20.25], [24.75, -20.5], [24.53, -21.03], [24.0, -21.25], [23.75, -21.15], [23.5, -21.25], [23.25, -21.15], [23.0, -21.25], [22.47, -21.03], [22.32, -20.68], [21.97, -20.53], [21.82, -20.18], [21.47, -20.03], [21.25, -19.5], [21.35, -19.25], [21.25, -19.0], [21.47, -18.47]]]]}, "2026-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, -18.47], [22.0, -18.25], [22.25, -18.35], [22.5, -18.25], [23.03, -18.47], [23.18, -18.82], [23.25, -18.85], [23.5, -18.75], [24.03, -18.97], [24.18, -19.32], [24.53, -19.47], [24.75, -20.0], [24.65, -20.25], [24.68, -20.32], [24.75, -20.35], [25.0, -20.25], [25.53, -20.47], [25.68, -20.82], [25.75, -20.85], [26.0, -20.75], [26.53, -20.97], [26.75, -21.5], [26.53, -22.03], [26.0, -22.25], [25.75, -22.15], [25.68, -22.18], [25.53, -22.53], [25.0, -22.75], [24.75, -22.65], [24.5, -22.75], [23.97, -22.53], [23.75, -22.0], [23.85, -21.75], [23.75, -21.5], [23.85, -21.25], [23.82, -21.18], [23.75, -21.15], [23.5, -21.25], [23.25, -21.15], [23.0, -21.25], [22.47, -21.03], [22.32, -20.68], [21.97, -20.53], [21.82, -20.18], [21.47, -20.03], [21.25, -19.5], [21.35, -19.25], [21.25, -19.0], [21.47, -18.47]]]]}, "2026-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.47, -18.47], [22.0, -18.25], [22.25, -18.35], [22.5, -18.25], [23.03, -18.47], [23.18, -18.82], [23.25, -18.85], [23.5, -18.75], [24.03, -18.97], [24.18, -19.32], [24.53, -19.47], [24.75, -20.0], [24.65, -20.25], [24.68, -20.32], [24.75, -20.35], [25.0, -20.25], [25.53, -20.47], [25.68, -20.82], [25.75, -20.85], [26.0, -20.75], [26.53, -20.97], [26.75, -21.5], [26.53, -22.03], [26.0, -22.25], [25.75, -22.15], [25.68, -22.18], [25.53, -22.53], [25.0, -22.75], [24.75, -22.65], [24.5, -22.75], [23.97, -22.53], [23.75, -22.0], [23.85, -21.75], [23.75, -21.5], [23.85, -21.25], [23.82, -21.18], [23.75, -21.15], [23.5, -21.25], [23.25, -21.15], [23.0, -21.25], [22.47, -21.03], [22.32, -20.68], [21.97, -20.53], [21.82, -20.18], [21.47, -20.03], [21.25, -19.5], [21.35, -19.25], [21.25, -19.0], [21.47, -18.47]]]]}, "2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.85, -21.25], [23.75, -21.0], [23.97, -20.47], [24.5, -20.25], [24.75, -20.35], [25.0, -20.25], [25.53, -20.47], [25.68, -20.82], [25.75, -20.85], [26.0, -20.75], [26.53, -20.97], [26.75, -21.5], [26.53, -22.03], [26.0, -22.25], [25.75, -22.15], [25.68, -22.18], [25.53, -22.53], [25.0, -22.75], [24.75, -22.65], [24.5, -22.75], [23.97, -22.53], [23.75, -22.0], [23.85, -21.75], [23.75, -21.5], [23.85, -21.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.47222844922652}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2541209641019044}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.03789222912917, 19.943482062930173, 18.791972399514805, 18.788083648681663]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.43653004964193, 17.245379384358728, 15.796022033691429, 18.141528065999353]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2043406720488816, -2.8043292741492216, -3.8119436416640182, -3.05143259621331]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.579671880618548, -4.163952378197621, -5.47222844922652, -3.3331493132076844]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.667003791792402, -1.3283407182269822, -1.74972909863256, -1.295635832765446]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0871390987950584, -1.877274182051054, -2.3562144998509345, -1.444130360198966]}}