{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:00.604684", "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": "2022-Dec-02_to_2022-Dec-07_18.5_-31.5"}, "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": 2022120000198}, "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": "December 02 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 07 2022"}, "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": 56007.68916116073}, "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": ["South 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": ["Atlantic Ocean"]}, "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": -31.5}, "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": 18.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[19.25, -32.0], [19.03, -32.53], [18.5, -32.75], [17.97, -32.53], [17.82, -32.18], [17.47, -32.03], [17.25, -31.5], [17.35, -31.25], [17.32, -31.18], [16.97, -31.03], [16.82, -30.68], [16.47, -30.53], [16.25, -30.0], [16.35, -29.75], [16.25, -29.5], [16.35, -29.25], [16.25, -29.0], [16.47, -28.47], [17.0, -28.25], [17.53, -28.47], [17.75, -29.0], [17.65, -29.25], [17.68, -29.32], [17.8, -29.37], [17.97, -28.97], [18.5, -28.75], [18.75, -28.85], [19.0, -28.75], [19.25, -28.85], [19.5, -28.75], [20.03, -28.97], [20.25, -29.5], [20.15, -29.75], [20.25, -30.0], [20.15, -30.25], [20.25, -30.5], [20.03, -31.03], [19.68, -31.18], [19.53, -31.53], [19.18, -31.68], [19.15, -31.75], [19.25, -32.0]]]]}}, "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": {"2022-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.25, -30.5], [17.47, -29.97], [17.82, -29.82], [17.85, -29.75], [17.75, -29.5], 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-31.75], [19.25, -32.0], [19.03, -32.53], [18.5, -32.75], [17.97, -32.53], [17.75, -32.0], [17.85, -31.75], [17.82, -31.68], [17.47, -31.53], [17.32, -31.18], [16.97, -31.03], [16.75, -30.5], [16.88, -30.2], [16.47, -30.03]]]]}, "2022-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, -30.97], [18.5, -30.75], [19.03, -30.97], [19.25, -31.5], [19.15, -31.75], [19.25, -32.0], [19.03, -32.53], [18.5, -32.75], [17.97, -32.53], [17.75, -32.0], [17.85, -31.75], [17.75, -31.5], [17.97, -30.97]]], [[[17.0, -30.25], [16.47, -30.03], [16.25, -29.5], [16.47, -28.97], [17.0, -28.75], [17.53, -28.97], [17.75, -29.5], [17.53, -30.03], [17.0, -30.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.577782942530121}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.163883220419332}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.07362459137812, 16.43320173485597, 16.30536204186592, 15.942520409884253, 17.116016346104345, 17.205436409145136]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.337417831918799, 14.333033077907942, 13.960393327632517, 13.5229964706636, 15.940842199349504, 15.922243904399181]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.07335311219258, -3.896156659611262, -4.12455780654804, -4.5515585764243, -2.5535995566747545, -2.473543392127624]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.514057039739384, -5.326452217825533, -5.754104922542524, -6.577782942530121, -3.490966012383808, -2.916734425540483]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4808473754091511, -1.3096900926404056, -1.3812037423127599, -1.4791296279624133, -1.0502943146563635, -1.1143905868595168]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7380412980215767, -1.499123979531917, -1.6031151600379903, -1.9600841029936225, -1.133352383129017, -1.2403950044022987]}}