{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:50.919125", "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": "2012-Nov-29_to_2012-Dec-01_282.5_48.5"}, "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": 2012110001102}, "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 29 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 01 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 81862.57836512437}, "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": ["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": 48.5}, "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": 282.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "282.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 280.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 286.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.75, 49.0], [-79.53, 49.53], [-79.0, 49.75], [-78.75, 49.65], [-78.68, 49.68], [-78.65, 49.75], [-78.75, 50.0], [-78.53, 50.53], [-78.0, 50.75], [-77.47, 50.53], [-77.32, 50.18], [-77.25, 50.15], [-77.0, 50.25], [-76.75, 50.15], [-76.5, 50.25], [-76.25, 50.15], [-76.0, 50.25], [-75.47, 50.03], [-75.32, 49.68], [-75.25, 49.65], [-75.0, 49.75], [-74.47, 49.53], [-74.32, 49.18], [-74.25, 49.15], [-74.0, 49.25], [-73.75, 49.15], [-73.5, 49.25], [-72.97, 49.03], [-72.75, 48.5], [-72.97, 47.97], [-73.32, 47.82], [-73.35, 47.75], [-73.25, 47.5], [-73.47, 46.97], [-74.0, 46.75], [-74.25, 46.85], [-74.5, 46.75], [-74.75, 46.85], [-75.0, 46.75], [-75.25, 46.85], [-75.5, 46.75], [-76.0, 46.96], [-76.5, 46.75], [-77.03, 46.97], [-77.18, 47.32], [-77.25, 47.35], [-77.5, 47.25], [-77.75, 47.35], [-78.0, 47.25], [-78.53, 47.47], [-78.68, 47.82], [-79.03, 47.97], [-79.18, 48.32], [-79.53, 48.47], [-79.75, 49.0]]]]}, "2012-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.75, 49.0], [-79.53, 49.53], [-79.0, 49.75], [-78.75, 49.65], [-78.68, 49.68], [-78.65, 49.75], [-78.75, 50.0], [-78.53, 50.53], [-78.0, 50.75], [-77.47, 50.53], [-77.32, 50.18], [-77.25, 50.15], [-77.0, 50.25], [-76.75, 50.15], [-76.5, 50.25], [-76.25, 50.15], [-76.0, 50.25], [-75.47, 50.03], [-75.32, 49.68], [-75.25, 49.65], [-75.0, 49.75], [-74.47, 49.53], [-74.32, 49.18], [-74.25, 49.15], [-74.0, 49.25], [-73.75, 49.15], [-73.5, 49.25], [-72.97, 49.03], [-72.75, 48.5], [-72.97, 47.97], [-73.32, 47.82], [-73.35, 47.75], [-73.25, 47.5], [-73.47, 46.97], [-74.0, 46.75], [-74.25, 46.85], [-74.5, 46.75], [-74.75, 46.85], [-75.0, 46.75], [-75.25, 46.85], [-75.5, 46.75], [-76.0, 46.96], [-76.5, 46.75], [-77.03, 46.97], [-77.18, 47.32], [-77.25, 47.35], [-77.5, 47.25], [-77.75, 47.35], [-78.0, 47.25], [-78.53, 47.47], [-78.68, 47.82], [-79.03, 47.97], [-79.18, 48.32], [-79.53, 48.47], [-79.75, 49.0]]]]}, "2012-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.75, 49.0], [-79.53, 49.53], [-79.0, 49.75], [-78.75, 49.65], [-78.68, 49.68], [-78.65, 49.75], [-78.75, 50.0], [-78.53, 50.53], [-78.0, 50.75], [-77.47, 50.53], [-77.32, 50.18], [-77.25, 50.15], [-77.0, 50.25], [-76.75, 50.15], [-76.5, 50.25], [-76.25, 50.15], [-76.0, 50.25], [-75.47, 50.03], [-75.32, 49.68], [-75.25, 49.65], [-75.0, 49.75], [-74.47, 49.53], [-74.32, 49.18], [-74.25, 49.15], [-74.0, 49.25], [-73.75, 49.15], [-73.5, 49.25], [-72.97, 49.03], [-72.75, 48.5], [-72.97, 47.97], [-73.32, 47.82], [-73.35, 47.75], [-73.25, 47.5], [-73.47, 46.97], [-74.0, 46.75], [-74.25, 46.85], [-74.5, 46.75], [-74.75, 46.85], [-75.0, 46.75], [-75.25, 46.85], [-75.5, 46.75], [-76.0, 46.96], [-76.5, 46.75], [-77.03, 46.97], [-77.18, 47.32], [-77.25, 47.35], [-77.5, 47.25], [-77.75, 47.35], [-78.0, 47.25], [-78.53, 47.47], [-78.68, 47.82], [-79.03, 47.97], [-79.18, 48.32], [-79.53, 48.47], [-79.75, 49.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.731236237132919}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.794340355895562}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-16.336107606689723, -19.78604714693813, -16.216905583815276]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.683616333072194, -22.256054684407104, -17.53846531300141]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.820073299417455, -13.13598287646202, -9.426964891807218]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.976172537857536, -15.731236237132919, -10.764970602199355]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6769714549053099, -2.2386880031441714, -1.5654153748407946]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0174187783158106, -2.634704380940766, -1.928936966983234]}}