{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:57:48.203210", "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": "2014-Nov-28_to_2014-Dec-02_284.0_65.0"}, "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": 2014110000981}, "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 28 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 02 2014"}, "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": 71968.38093129931}, "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": 65.0}, "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": 284.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "284.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 281.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 288.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.25}, "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": {"2014-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.5, 65.75], [-77.25, 65.65], [-77.0, 65.75], [-76.75, 65.65], [-76.5, 65.75], [-76.25, 65.65], [-76.18, 65.68], [-76.03, 66.03], [-75.5, 66.25], [-75.25, 66.15], [-75.0, 66.25], [-74.75, 66.15], [-74.5, 66.25], [-74.25, 66.15], [-74.0, 66.25], [-73.47, 66.03], [-73.25, 65.5], [-73.47, 64.97], [-74.0, 64.75], [-74.25, 64.85], [-74.32, 64.82], [-74.47, 64.47], [-75.0, 64.25], [-75.25, 64.35], [-75.5, 64.25], [-75.75, 64.35], [-76.0, 64.25], [-76.25, 64.35], [-76.32, 64.32], [-76.47, 63.97], [-77.0, 63.75], [-77.25, 63.85], [-77.5, 63.75], [-77.75, 63.85], [-78.0, 63.75], [-78.53, 63.97], [-78.75, 64.5], [-78.53, 65.03], [-78.18, 65.18], [-78.03, 65.53], [-77.5, 65.75]]]]}, "2014-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.25, 65.65], [-77.0, 65.75], [-76.75, 65.65], [-76.5, 65.75], [-76.25, 65.65], [-76.18, 65.68], [-76.03, 66.03], [-75.5, 66.25], [-75.25, 66.15], [-75.18, 66.18], [-75.03, 66.53], [-74.68, 66.68], [-74.53, 67.03], [-74.18, 67.18], [-74.12, 67.3], [-74.53, 67.47], [-74.75, 68.0], [-74.53, 68.53], [-74.0, 68.75], [-73.75, 68.65], [-73.5, 68.75], [-73.25, 68.65], [-73.0, 68.75], [-72.47, 68.53], [-72.32, 68.18], [-72.25, 68.15], [-72.0, 68.25], [-71.75, 68.15], [-71.5, 68.25], [-70.97, 68.03], [-70.75, 67.5], [-70.85, 67.25], [-70.75, 67.0], [-70.85, 66.75], [-70.75, 66.5], [-70.85, 66.25], [-70.75, 66.0], [-70.97, 65.47], [-71.5, 65.25], [-71.75, 65.35], [-71.82, 65.32], [-71.85, 65.25], [-71.75, 65.0], [-71.97, 64.47], [-72.5, 64.25], [-72.75, 64.35], [-73.0, 64.25], [-73.25, 64.35], [-73.5, 64.25], [-73.75, 64.35], [-74.0, 64.25], [-74.25, 64.35], [-74.5, 64.25], [-74.75, 64.35], [-75.0, 64.25], [-75.25, 64.35], [-75.5, 64.25], [-75.75, 64.35], [-75.82, 64.32], [-75.97, 63.97], [-76.5, 63.75], [-76.75, 63.85], [-77.0, 63.75], [-77.25, 63.85], [-77.5, 63.75], [-77.75, 63.85], [-78.0, 63.75], [-78.53, 63.97], [-78.75, 64.5], [-78.53, 65.03], [-78.18, 65.18], [-78.03, 65.53], [-77.5, 65.75], [-77.25, 65.65]]], [[[-75.47, 66.97], [-76.0, 66.75], [-76.25, 66.85], [-76.5, 66.75], [-77.03, 66.97], [-77.18, 67.32], [-77.53, 67.47], [-77.75, 68.0], [-77.53, 68.53], [-77.0, 68.75], [-76.75, 68.65], [-76.5, 68.75], [-76.25, 68.65], [-76.0, 68.75], [-75.75, 68.65], [-75.5, 68.75], [-74.97, 68.53], [-74.75, 68.0], [-74.97, 67.47], [-75.32, 67.32], [-75.47, 66.97]]]]}, "2014-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.5, 65.75], [-77.25, 65.65], [-77.0, 65.75], [-76.75, 65.65], [-76.5, 65.75], [-76.25, 65.65], [-76.18, 65.68], [-76.03, 66.03], [-75.5, 66.25], [-75.25, 66.15], [-75.18, 66.18], [-75.03, 66.53], [-74.68, 66.68], [-74.62, 66.8], [-75.03, 66.97], [-75.18, 67.32], [-75.25, 67.35], [-75.32, 67.32], [-75.47, 66.97], [-76.0, 66.75], [-76.25, 66.85], [-76.5, 66.75], [-76.75, 66.85], [-77.0, 66.75], [-77.25, 66.85], [-77.5, 66.75], [-78.03, 66.97], [-78.25, 67.5], [-78.15, 67.75], [-78.25, 68.0], [-78.03, 68.53], [-77.5, 68.75], [-77.25, 68.65], [-77.0, 68.75], [-76.75, 68.65], [-76.5, 68.75], [-76.25, 68.65], [-76.0, 68.75], [-75.75, 68.65], [-75.5, 68.75], [-75.25, 68.65], [-75.0, 68.75], [-74.5, 68.54], [-74.0, 68.75], [-73.75, 68.65], [-73.5, 68.75], [-73.25, 68.65], [-73.0, 68.75], [-72.47, 68.53], [-72.32, 68.18], [-72.25, 68.15], [-72.0, 68.25], [-71.75, 68.15], [-71.5, 68.25], [-70.97, 68.03], [-70.75, 67.5], [-70.85, 67.25], [-70.75, 67.0], [-70.85, 66.75], [-70.75, 66.5], [-70.85, 66.25], [-70.75, 66.0], [-70.97, 65.47], [-71.5, 65.25], [-71.75, 65.35], [-71.82, 65.32], [-71.85, 65.25], [-71.75, 65.0], [-71.97, 64.47], [-72.5, 64.25], [-72.75, 64.35], [-73.0, 64.25], [-73.25, 64.35], [-73.5, 64.25], [-73.75, 64.35], [-74.0, 64.25], [-74.25, 64.35], [-74.5, 64.25], [-74.75, 64.35], [-75.0, 64.25], [-75.25, 64.35], [-75.5, 64.25], [-75.75, 64.35], [-75.82, 64.32], [-75.97, 63.97], [-76.5, 63.75], [-76.75, 63.85], [-77.0, 63.75], [-77.25, 63.85], [-77.5, 63.75], [-77.75, 63.85], [-78.0, 63.75], [-78.53, 63.97], [-78.75, 64.5], [-78.53, 65.03], [-78.18, 65.18], [-78.03, 65.53], [-77.5, 65.75]]]]}, "2014-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.5, 65.75], [-77.25, 65.65], [-77.0, 65.75], [-76.75, 65.65], [-76.5, 65.75], [-76.25, 65.65], [-76.18, 65.68], [-76.03, 66.03], [-75.5, 66.25], [-75.25, 66.15], [-75.18, 66.18], [-75.03, 66.53], [-74.68, 66.68], [-74.62, 66.8], [-75.03, 66.97], [-75.18, 67.32], [-75.25, 67.35], [-75.32, 67.32], [-75.47, 66.97], [-76.0, 66.75], [-76.25, 66.85], [-76.5, 66.75], [-76.75, 66.85], [-77.0, 66.75], [-77.25, 66.85], [-77.5, 66.75], [-78.03, 66.97], [-78.25, 67.5], [-78.15, 67.75], [-78.25, 68.0], [-78.03, 68.53], [-77.5, 68.75], [-77.25, 68.65], [-77.0, 68.75], [-76.75, 68.65], [-76.5, 68.75], [-76.25, 68.65], [-76.0, 68.75], [-75.75, 68.65], [-75.5, 68.75], [-75.25, 68.65], [-75.0, 68.75], [-74.5, 68.54], [-74.0, 68.75], [-73.75, 68.65], [-73.5, 68.75], [-73.25, 68.65], [-73.0, 68.75], [-72.47, 68.53], [-72.32, 68.18], [-72.25, 68.15], [-72.0, 68.25], [-71.75, 68.15], [-71.5, 68.25], [-70.97, 68.03], [-70.75, 67.5], [-70.85, 67.25], [-70.75, 67.0], [-70.85, 66.75], [-70.75, 66.5], [-70.85, 66.25], [-70.75, 66.0], [-70.97, 65.47], [-71.5, 65.25], [-71.75, 65.35], [-71.82, 65.32], [-71.85, 65.25], [-71.75, 65.0], [-71.97, 64.47], [-72.5, 64.25], [-72.75, 64.35], [-73.0, 64.25], [-73.25, 64.35], [-73.5, 64.25], [-73.75, 64.35], [-74.0, 64.25], [-74.25, 64.35], [-74.5, 64.25], [-74.75, 64.35], [-75.0, 64.25], [-75.25, 64.35], [-75.5, 64.25], [-75.75, 64.35], [-75.82, 64.32], [-75.97, 63.97], [-76.5, 63.75], [-76.75, 63.85], [-77.0, 63.75], [-77.25, 63.85], [-77.5, 63.75], [-77.75, 63.85], [-78.0, 63.75], [-78.53, 63.97], [-78.75, 64.5], [-78.53, 65.03], [-78.18, 65.18], [-78.03, 65.53], [-77.5, 65.75]]]]}, "2014-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.25, 65.0], [-78.03, 65.53], [-77.5, 65.75], [-77.25, 65.65], [-77.0, 65.75], [-76.75, 65.65], [-76.5, 65.75], [-76.25, 65.65], [-76.0, 65.75], [-75.75, 65.65], [-75.5, 65.75], [-75.25, 65.65], [-75.0, 65.75], [-74.47, 65.53], [-74.25, 65.0], [-74.47, 64.47], [-75.0, 64.25], [-75.25, 64.35], [-75.5, 64.25], [-75.75, 64.35], [-76.0, 64.25], [-76.25, 64.35], [-76.5, 64.25], [-76.75, 64.35], [-77.0, 64.25], [-77.25, 64.35], [-77.5, 64.25], [-78.03, 64.47], [-78.25, 65.0]]], [[[-77.5, 68.75], [-77.25, 68.65], [-77.0, 68.75], [-76.75, 68.65], [-76.5, 68.75], [-76.25, 68.65], [-76.0, 68.75], [-75.75, 68.65], [-75.5, 68.75], [-75.25, 68.65], [-75.0, 68.75], [-74.47, 68.53], [-74.32, 68.18], [-73.97, 68.03], [-73.75, 67.5], [-73.97, 66.97], [-74.5, 66.75], [-75.03, 66.97], [-75.18, 67.32], [-75.25, 67.35], [-75.5, 67.25], [-75.75, 67.35], [-75.82, 67.32], [-75.97, 66.97], [-76.5, 66.75], [-76.75, 66.85], [-77.0, 66.75], [-77.25, 66.85], [-77.5, 66.75], [-78.03, 66.97], [-78.25, 67.5], [-78.15, 67.75], [-78.25, 68.0], [-78.03, 68.53], [-77.5, 68.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -16.662819487741814}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.483069423257586}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-26.38943323655957, -29.43332420591085, -30.011287945147444, -29.750249858387775, -27.864057390026176]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-29.642974455170673, -34.450103938770184, -34.11773238565749, -32.43411575824277, -30.59280280622741]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.190125766948055, -11.671688501381627, -12.095161853113972, -11.542420793785936, -9.47480167132859]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.01450957298104, -16.662819487741814, -15.315093348293715, -13.637993301737282, -12.19665236629902]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.515502102659726, -1.6147256891445283, -1.6711237128698404, -1.5923654458377525, -1.4384721368886182]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6690074877994616, -2.029077476550408, -2.126086131340081, -1.9961791522625334, -1.727868663152484]}}