{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:56.260896", "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-Jan-31_to_2023-Feb-02_267.0_66.5"}, "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": 2023010001419}, "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": "January 31 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 02 2023"}, "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": 71575.50256589935}, "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": ["The Northwestern Passages"]}, "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": 66.5}, "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": 267.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "267.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 264.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 271.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 65.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 68.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.65, 66.75], [-95.75, 67.0], [-95.53, 67.53], [-95.0, 67.75], [-94.75, 67.65], [-94.68, 67.68], [-94.53, 68.03], [-94.18, 68.18], [-94.03, 68.53], [-93.5, 68.75], [-93.25, 68.65], [-93.0, 68.75], [-92.75, 68.65], [-92.5, 68.75], [-92.25, 68.65], [-92.0, 68.75], [-91.75, 68.65], [-91.5, 68.75], [-90.97, 68.53], [-90.82, 68.18], [-90.75, 68.15], [-90.68, 68.18], [-90.53, 68.53], [-90.0, 68.75], [-89.75, 68.65], [-89.5, 68.75], [-89.25, 68.65], [-89.0, 68.75], [-88.75, 68.65], [-88.5, 68.75], [-87.97, 68.53], [-87.75, 68.0], [-87.85, 67.75], [-87.75, 67.5], [-87.97, 66.97], [-88.32, 66.82], [-88.47, 66.47], [-88.82, 66.32], [-88.97, 65.97], [-89.32, 65.82], [-89.35, 65.75], [-89.25, 65.5], [-89.47, 64.97], [-90.0, 64.75], [-90.25, 64.85], [-90.5, 64.75], [-90.75, 64.85], [-91.0, 64.75], [-91.25, 64.85], [-91.5, 64.75], [-91.75, 64.85], [-92.0, 64.75], [-92.53, 64.97], [-92.68, 65.32], [-92.75, 65.35], [-93.0, 65.25], [-93.25, 65.35], [-93.5, 65.25], [-94.0, 65.46], [-94.5, 65.25], [-94.75, 65.35], [-95.0, 65.25], [-95.53, 65.47], [-95.75, 66.0], [-95.65, 66.25], [-95.75, 66.5], [-95.65, 66.75]]]]}, "2023-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.65, 66.75], [-95.75, 67.0], [-95.53, 67.53], [-95.0, 67.75], [-94.75, 67.65], [-94.68, 67.68], [-94.53, 68.03], [-94.18, 68.18], [-94.03, 68.53], [-93.5, 68.75], [-93.25, 68.65], [-93.0, 68.75], [-92.75, 68.65], [-92.5, 68.75], [-92.25, 68.65], [-92.0, 68.75], [-91.75, 68.65], [-91.5, 68.75], [-90.97, 68.53], [-90.82, 68.18], [-90.75, 68.15], [-90.68, 68.18], [-90.53, 68.53], [-90.0, 68.75], [-89.75, 68.65], [-89.5, 68.75], [-89.25, 68.65], [-89.0, 68.75], [-88.75, 68.65], [-88.5, 68.75], [-87.97, 68.53], [-87.75, 68.0], [-87.85, 67.75], [-87.75, 67.5], [-87.97, 66.97], [-88.32, 66.82], [-88.47, 66.47], [-88.82, 66.32], [-88.97, 65.97], [-89.32, 65.82], [-89.35, 65.75], [-89.25, 65.5], [-89.47, 64.97], [-90.0, 64.75], [-90.25, 64.85], [-90.5, 64.75], [-90.75, 64.85], [-91.0, 64.75], [-91.25, 64.85], [-91.5, 64.75], [-91.75, 64.85], [-92.0, 64.75], [-92.53, 64.97], [-92.68, 65.32], [-92.75, 65.35], [-93.0, 65.25], [-93.25, 65.35], [-93.5, 65.25], [-94.0, 65.46], [-94.5, 65.25], [-94.75, 65.35], [-95.0, 65.25], [-95.53, 65.47], [-95.75, 66.0], [-95.65, 66.25], [-95.75, 66.5], [-95.65, 66.75]]]]}, "2023-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.65, 66.75], [-95.75, 67.0], [-95.53, 67.53], [-95.0, 67.75], [-94.75, 67.65], [-94.68, 67.68], [-94.53, 68.03], [-94.18, 68.18], [-94.03, 68.53], [-93.5, 68.75], [-93.25, 68.65], [-93.0, 68.75], [-92.75, 68.65], [-92.5, 68.75], [-92.25, 68.65], [-92.0, 68.75], [-91.75, 68.65], [-91.5, 68.75], [-90.97, 68.53], [-90.82, 68.18], [-90.75, 68.15], [-90.68, 68.18], [-90.53, 68.53], [-90.0, 68.75], [-89.75, 68.65], [-89.5, 68.75], [-89.25, 68.65], [-89.0, 68.75], [-88.75, 68.65], [-88.5, 68.75], [-87.97, 68.53], [-87.75, 68.0], [-87.85, 67.75], [-87.75, 67.5], [-87.97, 66.97], [-88.32, 66.82], [-88.47, 66.47], [-88.82, 66.32], [-88.97, 65.97], [-89.32, 65.82], [-89.35, 65.75], [-89.25, 65.5], [-89.47, 64.97], [-90.0, 64.75], [-90.25, 64.85], [-90.5, 64.75], [-90.75, 64.85], [-91.0, 64.75], [-91.25, 64.85], [-91.5, 64.75], [-91.75, 64.85], [-92.0, 64.75], [-92.53, 64.97], [-92.68, 65.32], [-92.75, 65.35], [-93.0, 65.25], [-93.25, 65.35], [-93.5, 65.25], [-94.0, 65.46], [-94.5, 65.25], [-94.75, 65.35], [-95.0, 65.25], [-95.53, 65.47], [-95.75, 66.0], [-95.65, 66.25], [-95.75, 66.5], [-95.65, 66.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.09871722466849}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.765455507217622}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-42.07123639474733, -44.22644802841026, -42.88525728254575]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-44.2651680449743, -46.89531438900653, -45.54550701424239]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.74011008550065, -9.924889755943079, -8.631366680209164]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.942863337233376, -12.09871722466849, -10.633653674497992]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3657777867131324, -1.75892229832362, -1.5241905458038532]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5858513915934995, -2.113404811525355, -1.8012655136441569]}}