{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:59.280475", "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": "2024-Dec-16_to_2024-Dec-21_16.5_11.0"}, "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": 2024120000432}, "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 16 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 21 2024"}, "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": 69906.26434250984}, "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": ["Cameroon", "Chad"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-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": 11.0}, "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": 16.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 17.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.47, 12.03], [15.82, 12.18], [15.97, 12.53], [16.5, 12.75], 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11.5], [15.47, 12.03], [15.82, 12.18], [15.97, 12.53], [16.5, 12.75], [16.75, 12.65], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.75, 11.5], [17.65, 11.25], [17.68, 11.18], [18.03, 11.03], [18.25, 10.5], [18.03, 9.97], [17.68, 9.82], [17.53, 9.47], [17.18, 9.32], [17.15, 9.25], [17.25, 9.0], [17.03, 8.47], [16.5, 8.25], [16.25, 8.35], [16.0, 8.25], [15.47, 8.47], [15.32, 8.82], [14.97, 8.97], [14.82, 9.32], [14.47, 9.47], [14.25, 10.0]]]]}, "2024-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 10.0], [14.47, 10.53], [14.82, 10.68], [14.97, 11.03], [15.32, 11.18], [15.35, 11.25], [15.25, 11.5], [15.47, 12.03], [15.82, 12.18], [15.97, 12.53], [16.5, 12.75], [16.75, 12.65], [17.0, 12.75], [17.53, 12.53], [17.75, 12.0], [17.65, 11.75], [17.75, 11.5], [17.65, 11.25], [17.68, 11.18], [18.03, 11.03], [18.25, 10.5], [18.03, 9.97], [17.68, 9.82], [17.53, 9.47], [17.18, 9.32], [17.15, 9.25], [17.25, 9.0], [17.03, 8.47], [16.5, 8.25], [16.25, 8.35], [16.0, 8.25], [15.47, 8.47], [15.32, 8.82], [14.97, 8.97], [14.82, 9.32], [14.47, 9.47], [14.25, 10.0]]]]}, "2024-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 10.0], [14.47, 10.53], [14.82, 10.68], [14.97, 11.03], [15.32, 11.18], [15.35, 11.25], [15.25, 11.5], [15.47, 12.03], [16.0, 12.25], [16.25, 12.15], [16.5, 12.25], [16.75, 12.15], [17.0, 12.25], [17.53, 12.03], [17.75, 11.5], [17.65, 11.25], [17.68, 11.18], [18.03, 11.03], [18.25, 10.5], [18.03, 9.97], [17.68, 9.82], [17.53, 9.47], [17.18, 9.32], [17.15, 9.25], [17.25, 9.0], [17.03, 8.47], [16.5, 8.25], [16.25, 8.35], [16.0, 8.25], [15.47, 8.47], [15.32, 8.82], [14.97, 8.97], [14.82, 9.32], [14.47, 9.47], [14.25, 10.0]]]]}, "2024-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, 10.0], [14.47, 10.53], [15.0, 10.75], [15.3, 10.63], [15.35, 10.75], [15.25, 11.0], [15.47, 11.53], [16.0, 11.75], [16.25, 11.65], [16.5, 11.75], [17.03, 11.53], [17.25, 11.0], [17.15, 10.75], [17.25, 10.5], [17.15, 10.25], [17.25, 10.0], [17.03, 9.47], [16.68, 9.32], [16.53, 8.97], [16.0, 8.75], [15.75, 8.85], [15.5, 8.75], [14.97, 8.97], [14.82, 9.32], [14.47, 9.47], [14.25, 10.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.423852681707615}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6835774963871195}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.351525152297313, 22.66503530649038, 22.539801257589602, 22.41029792453935, 22.67488511100646, 22.91137932671444]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.542896525065146, 21.722070312500023, 21.443687693278036, 21.396548207600915, 21.53384933471682, 22.312285359700525]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9250188921712783, -2.7384764165005278, -2.7596318546250727, -2.7931345971490313, -2.538078536732972, -2.281648481251207]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1287072361342325, -3.153477333010983, -3.423852681707615, -3.3700110108456443, -3.0699770421896915, -2.7070891165370767]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5147313575921235, -1.5653241936560927, -1.673665476129248, -1.7239020303399002, -1.638756413396253, -1.5328128575321966]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6027455944547448, -1.723439567437793, -1.9035440549764409, -1.9926054836048932, -1.8756500585171318, -1.649273608855069]}}