{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:29.428556", "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": "2025-May-26_to_2025-May-30_260.5_38.0"}, "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": 2025050000552}, "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": "May 26 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 30 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 113788.26839191081}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": 38.0}, "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": 260.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "260.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 259.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 265.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.15, 38.75], [-101.25, 39.0], [-101.03, 39.53], [-100.5, 39.75], [-100.0, 39.54], [-99.5, 39.75], [-99.25, 39.65], [-99.0, 39.75], [-98.75, 39.65], [-98.5, 39.75], [-97.97, 39.53], [-97.82, 39.18], [-97.75, 39.15], [-97.5, 39.25], [-97.25, 39.15], [-97.0, 39.25], [-96.75, 39.15], [-96.68, 39.18], [-96.53, 39.53], [-96.0, 39.75], [-95.47, 39.53], [-95.32, 39.18], [-94.97, 39.03], [-94.82, 38.68], [-94.47, 38.53], [-94.25, 38.0], [-94.35, 37.75], [-94.25, 37.5], [-94.47, 36.97], [-95.0, 36.75], [-95.53, 36.97], [-95.68, 37.32], [-95.75, 37.35], [-96.0, 37.25], [-96.25, 37.35], [-96.32, 37.32], [-96.47, 36.97], [-97.0, 36.75], [-97.53, 36.97], [-97.68, 37.32], [-97.75, 37.35], [-98.0, 37.25], [-98.25, 37.35], [-98.32, 37.32], [-98.47, 36.97], [-99.0, 36.75], [-99.25, 36.85], [-99.5, 36.75], [-99.75, 36.85], [-100.0, 36.75], [-100.53, 36.97], [-100.68, 37.32], [-101.03, 37.47], [-101.25, 38.0], [-101.15, 38.25], [-101.25, 38.5], [-101.15, 38.75]]]]}, "2025-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.15, 38.75], [-101.25, 39.0], [-101.15, 39.25], [-101.25, 39.5], [-101.15, 39.75], [-101.25, 40.0], [-101.03, 40.53], [-100.5, 40.75], [-100.25, 40.65], [-100.0, 40.75], [-99.75, 40.65], [-99.5, 40.75], [-98.97, 40.53], [-98.82, 40.18], [-98.75, 40.15], [-98.5, 40.25], [-98.25, 40.15], [-98.0, 40.25], [-97.47, 40.03], [-97.25, 39.5], [-97.35, 39.25], [-97.32, 39.18], [-97.25, 39.15], [-97.0, 39.25], [-96.75, 39.15], [-96.68, 39.18], [-96.53, 39.53], [-96.0, 39.75], [-95.47, 39.53], [-95.32, 39.18], [-94.97, 39.03], [-94.82, 38.68], [-94.47, 38.53], [-94.25, 38.0], [-94.35, 37.75], [-94.25, 37.5], [-94.47, 36.97], [-95.0, 36.75], [-95.25, 36.85], [-95.5, 36.75], [-95.75, 36.85], [-96.0, 36.75], [-96.5, 36.96], [-97.0, 36.75], [-97.53, 36.97], [-97.68, 37.32], [-97.75, 37.35], [-98.0, 37.25], [-98.25, 37.35], [-98.32, 37.32], [-98.47, 36.97], [-99.0, 36.75], [-99.25, 36.85], [-99.5, 36.75], [-99.75, 36.85], [-100.0, 36.75], [-100.53, 36.97], [-100.68, 37.32], [-101.03, 37.47], [-101.25, 38.0], [-101.15, 38.25], [-101.25, 38.5], [-101.15, 38.75]]]]}, "2025-05-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-101.15, 38.75], [-101.25, 39.0], [-101.15, 39.25], [-101.25, 39.5], [-101.15, 39.75], [-101.25, 40.0], [-101.03, 40.53], [-100.5, 40.75], [-100.25, 40.65], [-100.0, 40.75], [-99.75, 40.65], [-99.5, 40.75], [-98.97, 40.53], [-98.82, 40.18], [-98.75, 40.15], [-98.5, 40.25], [-98.25, 40.15], [-98.0, 40.25], [-97.47, 40.03], [-97.25, 39.5], [-97.35, 39.25], [-97.32, 39.18], [-97.25, 39.15], [-97.0, 39.25], [-96.75, 39.15], [-96.68, 39.18], [-96.53, 39.53], [-96.0, 39.75], [-95.47, 39.53], [-95.32, 39.18], [-94.97, 39.03], [-94.82, 38.68], [-94.47, 38.53], [-94.25, 38.0], [-94.35, 37.75], [-94.25, 37.5], [-94.47, 36.97], [-95.0, 36.75], [-95.25, 36.85], [-95.5, 36.75], [-95.75, 36.85], [-96.0, 36.75], [-96.5, 36.96], [-97.0, 36.75], [-97.53, 36.97], [-97.68, 37.32], [-97.75, 37.35], [-98.0, 37.25], [-98.25, 37.35], [-98.32, 37.32], [-98.35, 37.25], [-98.25, 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36.85], [-96.0, 36.75], [-96.53, 36.97], [-96.68, 37.32], [-96.75, 37.35], [-97.0, 37.25], [-97.25, 37.35], [-97.5, 37.25], [-97.75, 37.35], [-98.0, 37.25], [-98.25, 37.35], [-98.32, 37.32], [-98.35, 37.25], [-98.25, 37.0], [-98.47, 36.47], [-99.0, 36.25], [-99.25, 36.35], [-99.5, 36.25], [-100.03, 36.47], [-100.18, 36.82], [-100.53, 36.97], [-100.68, 37.32], [-101.03, 37.47], [-101.25, 38.0], [-101.15, 38.25], [-101.25, 38.5], [-101.15, 38.75]]]]}, "2025-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-100.03, 36.47], [-100.25, 37.0], [-100.03, 37.53], [-99.5, 37.75], [-99.25, 37.65], [-99.0, 37.75], [-98.47, 37.53], [-98.25, 37.0], [-98.47, 36.47], [-99.0, 36.25], [-99.25, 36.35], [-99.5, 36.25], [-100.03, 36.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.112412051996728}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.017359385303031}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.185357935741763, 13.838213941786023, 14.50974713048197, 14.914555312647963, 17.184175109863304]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.7540107727051, 11.637834167480491, 12.562465922037802, 12.9682607014974, 17.11028188069662]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.066855982396841, -6.36568125730812, -5.95680075948813, -5.739236109957673, -4.905263177388747]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.646052445642113, -7.112412051996728, -6.81755670609374, -6.848366095714823, -5.024836289111136]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5488946750998351, -1.6274941618011667, -1.5415741853329752, -1.482848580263193, -1.2733515191983993]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6472015933817368, -1.7682640639093548, -1.725999948254974, -1.6837728965140484, -1.2876295953751744]}}