{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:54.858020", "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-Apr-30_to_2023-May-03_35.0_17.5"}, "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": 2023040000968}, "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": "April 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 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": 50039.524547210734}, "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": ["Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 17.5}, "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": 35.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "35.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 34.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 37.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 19.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.35, 17.75], [34.25, 18.0], [34.35, 18.25], [34.25, 18.5], [34.47, 19.03], [35.0, 19.25], [35.25, 19.15], [35.32, 19.18], [35.47, 19.53], [36.0, 19.75], [36.53, 19.53], [36.75, 19.0], [36.65, 18.75], [36.68, 18.68], [36.75, 18.65], [37.0, 18.75], [37.53, 18.53], [37.75, 18.0], [37.53, 17.47], [37.18, 17.32], [37.03, 16.97], [36.68, 16.82], [36.53, 16.47], [36.18, 16.32], [36.03, 15.97], [35.5, 15.75], [34.97, 15.97], [34.82, 16.32], [34.47, 16.47], [34.25, 17.0], [34.35, 17.25], [34.25, 17.5], [34.35, 17.75]]]]}, "2023-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.35, 17.75], [34.25, 18.0], [34.35, 18.25], [34.25, 18.5], [34.47, 19.03], [35.0, 19.25], [35.25, 19.15], [35.32, 19.18], [35.47, 19.53], [36.0, 19.75], [36.53, 19.53], [36.75, 19.0], [36.65, 18.75], [36.68, 18.68], [36.75, 18.65], [37.0, 18.75], [37.53, 18.53], [37.75, 18.0], [37.53, 17.47], [37.18, 17.32], [37.03, 16.97], [36.68, 16.82], [36.53, 16.47], [36.18, 16.32], [36.03, 15.97], [35.5, 15.75], [34.97, 15.97], [34.82, 16.32], [34.47, 16.47], [34.25, 17.0], [34.35, 17.25], [34.25, 17.5], [34.35, 17.75]]]]}, "2023-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[34.35, 17.75], [34.25, 18.0], [34.35, 18.25], [34.25, 18.5], [34.47, 19.03], [35.0, 19.25], [35.25, 19.15], [35.32, 19.18], [35.47, 19.53], [36.0, 19.75], [36.53, 19.53], [36.75, 19.0], [36.65, 18.75], [36.68, 18.68], [36.75, 18.65], [37.0, 18.75], [37.53, 18.53], [37.75, 18.0], [37.53, 17.47], [37.18, 17.32], [37.03, 16.97], [36.68, 16.82], [36.53, 16.47], [36.18, 16.32], [36.03, 15.97], [35.5, 15.75], [34.97, 15.97], [34.82, 16.32], [34.47, 16.47], [34.25, 17.0], [34.35, 17.25], [34.25, 17.5], [34.35, 17.75]]]]}, "2023-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.0, 18.25], [35.53, 18.03], [35.75, 17.5], [35.53, 16.97], [35.0, 16.75], [34.47, 16.97], [34.25, 17.5], [34.47, 18.03], [35.0, 18.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.9980566171159353}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0419696421281506}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.704383855382503, 29.19343593867967, 29.501791683779118, 30.817896877152236]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.84973497589675, 25.457553610322236, 26.27514092268109, 30.817896877152236]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7291551872173057, -3.319216331111985, -3.0957891833752287, -2.731689461686983]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.079162190219222, -3.9980566171159353, -3.731066349727996, -2.731689461686983]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.586222460070335, -1.9865897579369256, -1.8898454315747468, -1.530143603660412]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7504667710212813, -2.3034194535368093, -2.2950068103374104, -1.530143603660412]}}