{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:04.260903", "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-Nov-18_to_2022-Nov-21_349.0_15.0"}, "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": 2022110000670}, "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": "November 18 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 21 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": 101571.00402237262}, "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": ["Mali", "Mauritania", "Senegal"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-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": 15.0}, "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": 349.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "349.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 345.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 350.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-11-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.53, 16.03], [-14.0, 16.25], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.75, 16.15], [-12.68, 16.18], [-12.53, 16.53], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-11.25, 16.65], [-11.0, 16.75], [-10.47, 16.53], [-10.32, 16.18], [-9.97, 16.03], [-9.82, 15.68], [-9.47, 15.53], [-9.25, 15.0], [-9.35, 14.75], [-9.25, 14.5], [-9.47, 13.97], [-10.0, 13.75], [-10.25, 13.85], [-10.5, 13.75], [-10.75, 13.85], [-10.82, 13.82], [-10.97, 13.47], [-11.32, 13.32], [-11.47, 12.97], [-12.0, 12.75], [-12.25, 12.85], [-12.5, 12.75], [-13.03, 12.97], [-13.18, 13.32], [-13.53, 13.47], [-13.75, 14.0], [-13.65, 14.25], [-13.68, 14.32], [-13.75, 14.35], [-14.0, 14.25], [-14.53, 14.47], [-14.75, 15.0], [-14.65, 15.25], [-14.75, 15.5], [-14.53, 16.03]]]]}, "2022-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.53, 16.03], [-14.0, 16.25], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.75, 16.15], [-12.68, 16.18], [-12.53, 16.53], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-11.25, 16.65], [-11.0, 16.75], [-10.47, 16.53], [-10.32, 16.18], [-9.97, 16.03], [-9.82, 15.68], [-9.47, 15.53], [-9.25, 15.0], [-9.35, 14.75], [-9.25, 14.5], [-9.47, 13.97], [-10.0, 13.75], [-10.25, 13.85], [-10.32, 13.82], [-10.47, 13.47], [-11.0, 13.25], [-11.25, 13.35], [-11.32, 13.32], [-11.47, 12.97], [-12.0, 12.75], [-12.25, 12.85], [-12.5, 12.75], [-13.03, 12.97], [-13.18, 13.32], [-13.53, 13.47], [-13.75, 14.0], [-13.65, 14.25], [-13.68, 14.32], [-13.75, 14.35], [-14.0, 14.25], [-14.53, 14.47], [-14.75, 15.0], [-14.65, 15.25], [-14.75, 15.5], [-14.53, 16.03]]]]}, "2022-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.53, 16.03], [-14.0, 16.25], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.0, 16.25], [-12.75, 16.15], [-12.68, 16.18], [-12.53, 16.53], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-11.25, 16.65], [-11.0, 16.75], [-10.47, 16.53], [-10.32, 16.18], [-9.97, 16.03], [-9.82, 15.68], [-9.47, 15.53], [-9.25, 15.0], [-9.35, 14.75], [-9.25, 14.5], [-9.47, 13.97], [-10.0, 13.75], [-10.25, 13.85], [-10.32, 13.82], [-10.47, 13.47], [-11.0, 13.25], [-11.25, 13.35], [-11.32, 13.32], [-11.47, 12.97], [-12.0, 12.75], [-12.25, 12.85], [-12.5, 12.75], [-13.03, 12.97], [-13.18, 13.32], [-13.53, 13.47], [-13.75, 14.0], [-13.65, 14.25], [-13.68, 14.32], [-13.75, 14.35], [-14.0, 14.25], [-14.53, 14.47], [-14.75, 15.0], [-14.65, 15.25], [-14.75, 15.5], [-14.53, 16.03]]]]}, "2022-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.25, 14.5], [-12.03, 15.03], [-11.68, 15.18], [-11.53, 15.53], [-11.0, 15.75], [-10.47, 15.53], [-10.25, 15.0], [-10.35, 14.75], [-10.25, 14.5], [-10.35, 14.25], [-10.25, 14.0], [-10.47, 13.47], [-11.0, 13.25], [-11.53, 13.47], [-11.68, 13.82], [-12.03, 13.97], [-12.25, 14.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.797946986525346}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.908494055799473}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.333348832553895, 25.185543878114743, 25.77057593003923, 26.9280665782303]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.59057986829083, 24.01645422652149, 24.511819674647256, 26.66124984204282]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4596518608437847, -3.5221528427005317, -2.8573344312332503, -1.8301992843377946]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.548788507644531, -4.797946986525346, -4.004980303308514, -1.9228040282558254]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8783296947090493, -2.7176507798949188, -2.1973500640570154, -1.418991204656312]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.6255291060470154, -3.6521209428210857, -2.9687191315871218, -1.506342791595926]}}