{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:55.904116", "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-13_to_2025-Jan-18_26.5_-21.0"}, "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": 2025010000377}, "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 13 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 132035.52808617096}, "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", "Zimbabwe"]}, "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": -21.0}, "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": 26.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 26.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 31.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[25.35, -21.25], [25.25, -21.0], [25.47, -20.47], [25.82, -20.32], [25.97, -19.97], [26.5, -19.75], [26.75, -19.85], [27.0, -19.75], [27.25, -19.85], [27.5, -19.75], [28.03, -19.97], [28.18, -20.32], [28.25, -20.35], [28.5, -20.25], [28.75, -20.35], [29.0, -20.25], [29.25, -20.35], [29.5, -20.25], [30.0, -20.46], [30.5, -20.25], [30.75, -20.35], [31.0, -20.25], [31.53, -20.47], [31.75, -21.0], [31.65, -21.25], [31.75, -21.5], [31.65, -21.75], [31.75, -22.0], [31.53, -22.53], [31.0, -22.75], [30.75, -22.65], [30.5, -22.75], [30.0, -22.54], [29.68, -22.68], [29.53, -23.03], [29.0, -23.25], [28.75, -23.15], [28.68, -23.18], [28.53, -23.53], [28.18, -23.68], [28.03, -24.03], [27.5, -24.25], [27.25, -24.15], [27.0, -24.25], [26.47, -24.03], [26.25, -23.5], [26.35, -23.25], [26.32, -23.18], [26.25, -23.15], [26.0, -23.25], [25.47, -23.03], [25.25, -22.5], [25.35, -22.25], [25.25, -22.0], [25.35, -21.75], [25.25, -21.5], [25.35, -21.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.75, -20.5], [25.97, -19.97], [26.5, -19.75], [27.03, -19.97], [27.25, -20.5], [27.15, -20.75], [27.25, -21.0], [27.03, -21.53], [26.5, -21.75], [25.97, -21.53], [25.75, -21.0], [25.85, -20.75], [25.75, -20.5]]]]}, "2025-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.75, -20.5], [25.97, -19.97], [26.5, -19.75], [27.03, -19.97], [27.25, -20.5], [27.15, -20.75], [27.25, -21.0], [27.03, -21.53], [26.5, -21.75], [25.97, -21.53], [25.75, -21.0], [25.85, -20.75], [25.75, -20.5]]]]}, "2025-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.75, -20.5], [25.97, -19.97], [26.5, -19.75], [26.75, -19.85], [27.0, -19.75], [27.53, -19.97], [27.75, -20.5], [27.53, -21.03], [27.18, -21.18], [27.03, -21.53], [26.5, -21.75], [25.97, -21.53], [25.75, -21.0], [25.85, -20.75], [25.75, -20.5]]]]}, "2025-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.25, -22.0], [25.35, -21.75], [25.25, -21.5], [25.35, -21.25], [25.25, -21.0], [25.47, -20.47], [25.82, -20.32], [25.97, -19.97], [26.5, -19.75], [26.75, -19.85], [27.0, -19.75], [27.25, -19.85], [27.5, -19.75], [28.03, -19.97], [28.18, -20.32], [28.25, -20.35], [28.5, -20.25], [28.75, -20.35], [29.0, -20.25], [29.25, -20.35], [29.5, -20.25], [30.0, -20.46], [30.5, -20.25], [30.75, -20.35], [31.0, -20.25], [31.53, -20.47], [31.75, -21.0], [31.65, -21.25], [31.75, -21.5], [31.65, -21.75], [31.75, -22.0], [31.53, -22.53], [31.0, -22.75], [30.75, -22.65], [30.5, -22.75], [30.0, -22.54], [29.68, -22.68], [29.53, -23.03], [29.0, -23.25], [28.75, -23.15], [28.68, -23.18], [28.53, -23.53], [28.18, -23.68], [28.03, -24.03], [27.5, -24.25], [27.25, -24.15], [27.0, -24.25], [26.47, -24.03], [26.25, -23.5], [26.35, -23.25], [26.32, -23.18], [26.25, -23.15], [26.0, -23.25], [25.47, -23.03], [25.25, -22.5], [25.35, -22.25], [25.25, -22.0]]]]}, "2025-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.25, -22.0], [25.35, -21.75], [25.25, -21.5], [25.35, -21.25], [25.25, -21.0], [25.47, -20.47], [25.82, -20.32], [25.97, -19.97], [26.5, -19.75], [26.75, -19.85], [27.0, -19.75], [27.25, -19.85], [27.5, -19.75], [28.03, -19.97], [28.18, -20.32], [28.25, -20.35], [28.5, -20.25], [28.75, -20.35], [29.0, -20.25], [29.25, -20.35], [29.5, -20.25], [30.0, -20.46], [30.5, -20.25], [30.75, -20.35], [31.0, -20.25], [31.53, -20.47], [31.75, -21.0], [31.65, -21.25], [31.75, -21.5], [31.65, -21.75], [31.75, -22.0], [31.53, -22.53], [31.0, -22.75], [30.75, -22.65], [30.5, -22.75], [30.0, -22.54], [29.68, -22.68], [29.53, -23.03], [29.0, -23.25], [28.75, -23.15], [28.68, -23.18], [28.53, -23.53], [28.18, -23.68], [28.03, -24.03], [27.5, -24.25], [27.25, -24.15], [27.0, -24.25], [26.47, -24.03], [26.25, -23.5], [26.35, -23.25], [26.32, -23.18], [26.25, -23.15], [26.0, -23.25], [25.47, -23.03], 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-2.7477888590277075, -2.678786314539517, -3.9382845639533444, -5.403690903604741, -3.9383515974353775]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.0100537027300334, -2.853074145977814, -3.0218245768560905, -5.8320516753177, -6.7643080526376025, -5.159755812997389]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2119513861578453, -1.191031187716373, -1.1541958720614447, -1.5277599878811114, -2.06779706409162, -1.5177620070408675]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2560011730429033, -1.2632983037117145, -1.3188947953449803, -2.140336356490526, -2.418872036260107, -2.1427358164932766]}}