{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:52.586788", "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-Jan-05_to_2025-Jan-09_25.0_-23.0"}, "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": 2025010000192}, "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": "January 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 09 2025"}, "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": 111110.23754615618}, "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"]}, "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": -23.0}, "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": 25.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 23.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 26.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[26.25, -22.5], [26.15, -22.75], [26.18, -22.82], [26.53, -22.97], [26.75, -23.5], [26.53, -24.03], [26.18, -24.18], [26.03, -24.53], [25.68, -24.68], [25.53, -25.03], [25.0, -25.25], [24.75, -25.15], [24.5, -25.25], [24.25, -25.15], [24.0, -25.25], [23.47, -25.03], [23.32, -24.68], [22.97, -24.53], [22.75, -24.0], [22.85, -23.75], [22.82, -23.68], [22.47, -23.53], [22.25, -23.0], [22.35, -22.75], [22.25, -22.5], [22.35, -22.25], [22.25, -22.0], [22.35, -21.75], [22.25, -21.5], [22.47, -20.97], [23.0, -20.75], [23.25, -20.85], [23.5, -20.75], [23.75, -20.85], [24.0, -20.75], [24.25, -20.85], [24.32, -20.82], [24.47, -20.47], [25.0, -20.25], [25.53, -20.47], [25.68, -20.82], [26.03, -20.97], [26.25, -21.5], [26.15, -21.75], [26.25, -22.0], [26.15, -22.25], [26.25, -22.5]]]]}}, "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": {"2025-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -22.5], [22.47, -21.97], [23.0, -21.75], [23.25, -21.85], [23.5, -21.75], [23.75, -21.85], [23.82, -21.82], [23.97, -21.47], [24.5, -21.25], [25.03, -21.47], [25.2, -21.87], [25.5, -21.75], [26.03, -21.97], [26.25, -22.5], [26.15, -22.75], [26.18, -22.82], [26.53, -22.97], [26.75, -23.5], [26.53, -24.03], [26.18, -24.18], [26.03, -24.53], [25.68, -24.68], [25.53, -25.03], [25.0, -25.25], [24.75, -25.15], [24.5, -25.25], [24.25, -25.15], [24.0, -25.25], [23.47, -25.03], [23.32, -24.68], [22.97, -24.53], [22.75, -24.0], [22.85, -23.75], [22.82, -23.68], [22.47, -23.53], [22.25, -23.0], [22.35, -22.75], [22.25, -22.5]]]]}, "2025-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -22.5], [22.35, -22.25], [22.25, -22.0], [22.35, -21.75], [22.25, -21.5], [22.47, -20.97], [23.0, -20.75], [23.25, -20.85], [23.5, -20.75], [23.75, -20.85], [24.0, -20.75], [24.25, -20.85], [24.32, -20.82], [24.47, -20.47], [25.0, -20.25], [25.53, -20.47], 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[21.689970906575525, 21.07059758504232, 21.35631586710616, 21.784263865153036, 22.83902765909835]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7143495232474972, -4.0310417350721055, -3.9772406755813257, -3.697820443856339, -3.306545496425997]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.491130150017284, -4.70635358851564, -4.592600031343466, -4.6029752864750435, -3.306545496425997]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.401538169974831, -1.519062847926996, -1.474455853092047, -1.387859654724995, -1.2642437992056368]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6001527445465646, -1.79860701193964, -1.6695057402806968, -1.7017442840651433, -1.2642437992056368]}}