{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:29:20.754043", "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-Feb-22_to_2022-Feb-25_294.5_56.0"}, "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": 2022020000899}, "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": "February 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 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": 69742.63554244796}, "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": ["Canada"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.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": 56.0}, "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": 294.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "294.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 289.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 295.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 58.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, 57.53], [-70.5, 57.75], [-70.25, 57.65], [-70.18, 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"coordinates": [[[[-71.03, 57.53], [-70.5, 57.75], [-70.25, 57.65], [-70.18, 57.68], [-70.03, 58.03], [-69.5, 58.25], [-69.25, 58.15], [-69.0, 58.25], [-68.75, 58.15], [-68.68, 58.18], [-68.53, 58.53], [-68.0, 58.75], [-67.47, 58.53], [-67.32, 58.18], [-67.0, 58.04], [-66.5, 58.25], [-65.97, 58.03], [-65.82, 57.68], [-65.47, 57.53], [-65.32, 57.18], [-64.97, 57.03], [-64.82, 56.68], [-64.75, 56.65], [-64.5, 56.75], [-63.97, 56.53], [-63.75, 56.0], [-63.97, 55.47], [-64.5, 55.25], [-64.75, 55.35], [-65.0, 55.25], [-65.25, 55.35], [-65.5, 55.25], [-66.03, 55.47], [-66.18, 55.82], [-66.25, 55.85], [-66.32, 55.82], [-66.35, 55.75], [-66.25, 55.5], [-66.47, 54.97], [-67.0, 54.75], [-67.53, 54.97], [-67.68, 55.32], [-67.75, 55.35], [-67.82, 55.32], [-67.97, 54.97], [-68.5, 54.75], [-68.75, 54.85], [-69.0, 54.75], [-69.53, 54.97], [-69.68, 55.32], [-69.75, 55.35], [-70.0, 55.25], [-70.53, 55.47], [-70.68, 55.82], [-71.03, 55.97], [-71.25, 56.5], [-71.15, 56.75], [-71.25, 57.0], [-71.03, 57.53]]]]}, "2022-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, 57.53], [-70.5, 57.75], [-70.25, 57.65], [-70.18, 57.68], [-70.03, 58.03], [-69.5, 58.25], [-69.25, 58.15], [-69.0, 58.25], [-68.75, 58.15], [-68.68, 58.18], [-68.53, 58.53], [-68.0, 58.75], [-67.47, 58.53], [-67.32, 58.18], [-67.0, 58.04], [-66.5, 58.25], [-65.97, 58.03], [-65.82, 57.68], [-65.47, 57.53], [-65.32, 57.18], [-64.97, 57.03], [-64.82, 56.68], [-64.75, 56.65], [-64.5, 56.75], [-63.97, 56.53], [-63.75, 56.0], [-63.97, 55.47], [-64.5, 55.25], [-64.75, 55.35], [-65.0, 55.25], [-65.25, 55.35], [-65.5, 55.25], [-66.03, 55.47], [-66.18, 55.82], [-66.25, 55.85], [-66.32, 55.82], [-66.35, 55.75], [-66.25, 55.5], [-66.47, 54.97], [-67.0, 54.75], [-67.53, 54.97], [-67.68, 55.32], [-67.75, 55.35], [-67.82, 55.32], [-67.97, 54.97], [-68.5, 54.75], [-68.75, 54.85], [-69.0, 54.75], [-69.53, 54.97], [-69.68, 55.32], [-69.75, 55.35], [-70.0, 55.25], [-70.53, 55.47], [-70.68, 55.82], [-71.03, 55.97], [-71.25, 56.5], [-71.15, 56.75], [-71.25, 57.0], [-71.03, 57.53]]]]}, "2022-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.03, 57.03], [-67.5, 57.25], [-67.25, 57.15], [-67.0, 57.25], [-66.75, 57.15], [-66.68, 57.18], [-66.53, 57.53], [-66.0, 57.75], [-65.47, 57.53], [-65.32, 57.18], [-64.97, 57.03], [-64.82, 56.68], [-64.75, 56.65], [-64.5, 56.75], [-63.97, 56.53], [-63.75, 56.0], [-63.97, 55.47], [-64.5, 55.25], [-64.75, 55.35], [-65.0, 55.25], [-65.25, 55.35], [-65.5, 55.25], [-66.03, 55.47], [-66.18, 55.82], [-66.25, 55.85], [-66.32, 55.82], [-66.35, 55.75], [-66.25, 55.5], [-66.47, 54.97], [-67.0, 54.75], [-67.53, 54.97], [-67.68, 55.32], [-68.03, 55.47], [-68.25, 56.0], [-68.15, 56.25], [-68.25, 56.5], [-68.03, 57.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.914236355077804}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.06661964252867}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-30.701290592845368, -29.468410190479602, -30.06209491163395, -28.73765739326086]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-32.56629873483783, -30.965303699089333, -32.00238629938656, -29.178630977495487]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.538258222768585, -8.48064877614347, -9.22338160452688, -8.921651583364481]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.914236355077804, -8.92492298516055, -10.41733370362627, -9.326792766805482]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3490855624611038, -1.2082754111274239, -1.3027864384336632, -1.2538294192429758]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5222497569796103, -1.2613468908411067, -1.42283249461878, -1.324762511226801]}}