{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:57.727908", "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": "2023-Nov-23_to_2023-Nov-26_348.0_14.5"}, "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": 2023110000503}, "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 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 26 2023"}, "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": 77908.18627956067}, "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": ["Gambia", "Guinea-Bissau", "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": 14.5}, "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": 348.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "348.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 349.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 15.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.75, 13.0], [-16.53, 13.53], [-16.0, 13.75], [-15.7, 13.62], [-15.53, 14.03], [-15.18, 14.18], [-15.15, 14.25], [-15.25, 14.5], [-15.03, 15.03], [-14.5, 15.25], [-13.97, 15.03], [-13.82, 14.68], [-13.75, 14.65], [-13.5, 14.75], [-12.97, 14.53], [-12.75, 14.0], [-12.97, 13.47], [-13.5, 13.25], [-13.75, 13.35], [-13.82, 13.32], [-13.97, 12.97], [-14.37, 12.8], [-14.25, 12.5], [-14.47, 11.97], [-15.0, 11.75], [-15.53, 11.97], [-15.7, 12.38], [-16.0, 12.25], [-16.53, 12.47], [-16.75, 13.0]]], [[[-12.75, 14.5], [-12.53, 15.03], [-12.0, 15.25], [-11.75, 15.15], [-11.5, 15.25], [-10.97, 15.03], [-10.75, 14.5], [-10.97, 13.97], [-11.5, 13.75], [-11.75, 13.85], [-12.0, 13.75], [-12.53, 13.97], [-12.75, 14.5]]]]}, "2023-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.03, 14.53], [-15.5, 14.75], [-15.2, 14.62], [-15.03, 15.03], [-14.5, 15.25], [-14.25, 15.15], [-14.18, 15.18], [-14.03, 15.53], [-13.5, 15.75], [-13.25, 15.65], [-13.0, 15.75], [-12.75, 15.65], [-12.5, 15.75], [-12.25, 15.65], [-12.18, 15.68], [-12.03, 16.03], [-11.5, 16.25], [-10.97, 16.03], [-10.82, 15.68], [-10.47, 15.53], [-10.25, 15.0], [-10.47, 14.47], [-10.82, 14.32], [-10.97, 13.97], [-11.5, 13.75], [-11.75, 13.85], [-12.0, 13.75], [-12.25, 13.85], [-12.32, 13.82], [-12.35, 13.75], [-12.25, 13.5], [-12.47, 12.97], [-13.0, 12.75], [-13.53, 12.97], [-13.68, 13.32], [-13.75, 13.35], [-13.82, 13.32], [-13.97, 12.97], [-14.32, 12.82], [-14.35, 12.75], [-14.25, 12.5], [-14.47, 11.97], [-15.0, 11.75], [-15.53, 11.97], [-15.68, 12.32], [-15.75, 12.35], [-16.0, 12.25], [-16.53, 12.47], [-16.75, 13.0], [-16.53, 13.53], [-16.12, 13.7], [-16.25, 14.0], [-16.03, 14.53]]]]}, "2023-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.03, 14.53], [-15.5, 14.75], [-15.2, 14.62], [-15.03, 15.03], [-14.5, 15.25], [-14.25, 15.15], [-14.18, 15.18], [-14.03, 15.53], [-13.5, 15.75], [-13.25, 15.65], [-13.0, 15.75], [-12.75, 15.65], [-12.5, 15.75], [-12.25, 15.65], [-12.18, 15.68], [-12.03, 16.03], [-11.5, 16.25], [-10.97, 16.03], [-10.82, 15.68], [-10.47, 15.53], [-10.25, 15.0], [-10.47, 14.47], [-10.82, 14.32], [-10.97, 13.97], [-11.5, 13.75], [-11.75, 13.85], [-12.0, 13.75], [-12.25, 13.85], [-12.32, 13.82], [-12.35, 13.75], [-12.25, 13.5], [-12.47, 12.97], [-13.0, 12.75], [-13.53, 12.97], [-13.68, 13.32], [-13.75, 13.35], [-13.82, 13.32], [-13.97, 12.97], [-14.32, 12.82], [-14.35, 12.75], [-14.25, 12.5], [-14.47, 11.97], [-15.0, 11.75], [-15.53, 11.97], [-15.68, 12.32], [-15.75, 12.35], [-16.0, 12.25], [-16.53, 12.47], [-16.75, 13.0], [-16.53, 13.53], [-16.12, 13.7], [-16.25, 14.0], [-16.03, 14.53]]]]}, "2023-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.03, 14.53], [-15.5, 14.75], [-15.2, 14.62], [-15.03, 15.03], [-14.5, 15.25], [-14.25, 15.15], [-14.18, 15.18], [-14.03, 15.53], [-13.5, 15.75], [-13.25, 15.65], [-13.0, 15.75], [-12.75, 15.65], [-12.5, 15.75], [-12.25, 15.65], [-12.18, 15.68], [-12.03, 16.03], [-11.5, 16.25], [-10.97, 16.03], [-10.82, 15.68], [-10.47, 15.53], [-10.25, 15.0], [-10.47, 14.47], [-10.82, 14.32], [-10.97, 13.97], [-11.5, 13.75], [-11.75, 13.85], [-12.0, 13.75], [-12.25, 13.85], [-12.32, 13.82], [-12.35, 13.75], [-12.25, 13.5], [-12.47, 12.97], [-13.0, 12.75], [-13.53, 12.97], [-13.68, 13.32], [-13.75, 13.35], [-13.82, 13.32], [-13.97, 12.97], [-14.32, 12.82], [-14.35, 12.75], [-14.25, 12.5], [-14.47, 11.97], [-15.0, 11.75], [-15.53, 11.97], [-15.68, 12.32], [-16.03, 12.47], [-16.25, 13.0], [-16.04, 13.5], [-16.25, 14.0], [-16.03, 14.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1512411280197057}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1506510244123964}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.073634605467248, 25.968759774899922, 25.46260661969444, 25.59597018515052]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.172819749540338, 25.114330940494312, 24.361824118605853, 24.649036366696293]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8118116887844793, -1.9816431117034046, -2.3926581982105994, -2.210267527130784]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.299913052416116, -2.8777113183205074, -3.1512411280197057, -2.7566309377234575]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5419408646669996, -1.5902385441211528, -1.9019329279699142, -1.7247293265955688]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8921388806823247, -2.3292013085192513, -2.4462875878706427, -2.0605831417994507]}}