{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:25.685419", "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-09_to_2022-Dec-12_23.5_-19.5"}, "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": 2022120000469}, "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 09 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 12 2022"}, "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": 55350.00904154742}, "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": ["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": -19.5}, "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": 23.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.5\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": 24.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.75, -19.5], [22.97, -18.97], [23.32, -18.82], [23.47, -18.47], [23.82, -18.32], [23.97, -17.97], [24.5, -17.75], [25.03, -17.97], [25.25, -18.5], [25.15, -18.75], [25.25, -19.0], [25.15, -19.25], [25.25, -19.5], [25.15, -19.75], [25.25, -20.0], [25.03, -20.53], [24.5, -20.75], [24.25, -20.65], [24.0, -20.75], [23.47, -20.53], [23.32, -20.18], [22.97, -20.03], [22.75, -19.5]]]]}, "2022-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, -19.5], [21.47, -18.97], [21.82, -18.82], [21.85, -18.75], [21.75, -18.5], [21.97, -17.97], [22.5, -17.75], [23.03, -17.97], [23.18, -18.32], [23.5, -18.46], [23.82, -18.32], [23.97, -17.97], [24.5, -17.75], [25.03, -17.97], [25.25, -18.5], [25.15, -18.75], [25.25, -19.0], [25.15, -19.25], [25.25, -19.5], [25.15, -19.75], [25.25, -20.0], [25.03, -20.53], [24.5, -20.75], [24.25, -20.65], [24.18, -20.68], [24.03, -21.03], [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]]]]}, "2022-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, -19.5], [21.47, -18.97], [21.82, -18.82], [21.85, -18.75], [21.75, -18.5], [21.97, -17.97], [22.5, -17.75], [23.03, -17.97], [23.18, -18.32], [23.5, -18.46], [23.82, -18.32], [23.97, -17.97], [24.5, -17.75], [25.03, -17.97], [25.25, -18.5], [25.15, -18.75], [25.25, -19.0], [25.15, -19.25], [25.25, -19.5], [25.15, -19.75], [25.25, -20.0], [25.03, -20.53], [24.5, -20.75], [24.25, -20.65], [24.18, -20.68], [24.03, -21.03], [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]]]]}, "2022-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.25, -19.5], [21.47, -18.97], [21.82, -18.82], [21.85, -18.75], [21.75, -18.5], [21.97, -17.97], [22.5, -17.75], [23.03, -17.97], [23.18, -18.32], [23.53, -18.47], [23.68, -18.82], [24.03, -18.97], [24.25, -19.5], [24.15, -19.75], [24.25, -20.0], [24.15, -20.25], [24.25, -20.5], [24.03, -21.03], [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]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.01991256735738}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.282349380800387}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.280169074751086, 22.854095135672424, 22.87213307009614, 22.975299107872274]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.086832723302848, 22.36136444998175, 22.371067908216787, 22.46601355164131]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7977340525833654, -3.37625068958087, -3.3420590525369436, -3.362208880459756]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.128271269000777, -4.01991256735738, -3.9310966136602588, -3.8200147079858766]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.325082378372057, -1.548972450418225, -1.5147024253731864, -1.4667519595421872]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.389809454713195, -1.7943399232789876, -1.708369184658718, -1.645224853738492]}}