{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:07.547829", "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": "2019-Feb-26_to_2019-Feb-28_289.5_47.5"}, "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": 2019020000806}, "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 26 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 28 2019"}, "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": 52994.88066936117}, "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", "United States"]}, "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": ["Gulf of St. Lawrence"]}, "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": 47.5}, "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": 289.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 290.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.53, 47.03], [-74.0, 47.25], [-73.75, 47.15], [-73.68, 47.18], [-73.65, 47.25], [-73.75, 47.5], [-73.53, 48.03], [-73.18, 48.18], [-73.03, 48.53], [-72.5, 48.75], [-71.97, 48.53], [-71.75, 48.0], [-71.85, 47.75], [-71.82, 47.68], [-71.75, 47.65], [-71.5, 47.75], [-71.25, 47.65], [-71.18, 47.68], [-71.03, 48.03], [-70.5, 48.25], [-70.25, 48.15], [-70.0, 48.25], [-69.47, 48.03], [-69.25, 47.5], [-69.35, 47.25], [-69.32, 47.18], [-68.97, 47.03], [-68.75, 46.5], [-68.85, 46.25], [-68.75, 46.0], [-68.97, 45.47], [-69.5, 45.25], [-69.75, 45.35], [-70.0, 45.25], [-70.25, 45.35], [-70.32, 45.32], [-70.47, 44.97], [-71.0, 44.75], [-71.53, 44.97], [-71.68, 45.32], [-72.03, 45.47], [-72.25, 46.0], [-72.12, 46.3], [-72.25, 46.35], [-72.5, 46.25], [-72.75, 46.35], [-72.82, 46.32], [-72.97, 45.97], [-73.32, 45.82], [-73.47, 45.47], [-74.0, 45.25], [-74.53, 45.47], [-74.75, 46.0], [-74.65, 46.25], [-74.75, 46.5], [-74.53, 47.03]]]]}, "2019-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.53, 47.03], [-74.0, 47.25], [-73.75, 47.15], [-73.68, 47.18], [-73.65, 47.25], [-73.75, 47.5], [-73.53, 48.03], [-73.18, 48.18], [-73.03, 48.53], [-72.5, 48.75], [-71.97, 48.53], [-71.75, 48.0], [-71.85, 47.75], [-71.82, 47.68], [-71.75, 47.65], [-71.5, 47.75], [-71.25, 47.65], [-71.18, 47.68], [-71.03, 48.03], [-70.5, 48.25], [-70.25, 48.15], [-70.0, 48.25], [-69.47, 48.03], [-69.25, 47.5], [-69.35, 47.25], [-69.32, 47.18], [-68.97, 47.03], [-68.75, 46.5], [-68.85, 46.25], [-68.75, 46.0], [-68.97, 45.47], [-69.5, 45.25], [-69.75, 45.35], [-70.0, 45.25], [-70.25, 45.35], [-70.32, 45.32], [-70.47, 44.97], [-71.0, 44.75], [-71.53, 44.97], [-71.68, 45.32], [-72.03, 45.47], [-72.25, 46.0], [-72.12, 46.3], [-72.25, 46.35], [-72.5, 46.25], [-72.75, 46.35], [-72.82, 46.32], [-72.97, 45.97], [-73.32, 45.82], [-73.47, 45.47], [-74.0, 45.25], [-74.53, 45.47], [-74.75, 46.0], [-74.65, 46.25], [-74.75, 46.5], [-74.53, 47.03]]]]}, "2019-02-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.53, 47.03], [-74.0, 47.25], [-73.75, 47.15], [-73.68, 47.18], [-73.65, 47.25], [-73.75, 47.5], [-73.53, 48.03], [-73.18, 48.18], [-73.03, 48.53], [-72.5, 48.75], [-71.97, 48.53], [-71.75, 48.0], [-71.85, 47.75], [-71.82, 47.68], [-71.75, 47.65], [-71.5, 47.75], [-71.25, 47.65], [-71.18, 47.68], [-71.03, 48.03], [-70.5, 48.25], [-70.25, 48.15], [-70.0, 48.25], [-69.47, 48.03], [-69.25, 47.5], [-69.35, 47.25], [-69.32, 47.18], [-68.97, 47.03], [-68.75, 46.5], [-68.85, 46.25], [-68.75, 46.0], [-68.97, 45.47], [-69.5, 45.25], [-69.75, 45.35], [-70.0, 45.25], [-70.25, 45.35], [-70.32, 45.32], [-70.47, 44.97], [-71.0, 44.75], [-71.53, 44.97], [-71.68, 45.32], [-72.03, 45.47], [-72.25, 46.0], [-72.12, 46.3], [-72.25, 46.35], [-72.5, 46.25], [-72.75, 46.35], [-72.82, 46.32], [-72.97, 45.97], [-73.32, 45.82], [-73.47, 45.47], [-74.0, 45.25], [-74.53, 45.47], [-74.75, 46.0], [-74.65, 46.25], [-74.75, 46.5], [-74.53, 47.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.224290692288122}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.043497150328143}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-17.4799597904709, -19.870108562620374, -18.41327708797411]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.576244566548866, -22.035600766911017, -20.956183418517384]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.892404959093717, -11.397938466804998, -9.840148025085696]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.658011652547458, -12.224290692288122, -11.34360729429008]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.373593691506076, -1.762091040355011, -1.5173466379569078]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6004044934788864, -1.9023300568296257, -1.7205378946104142]}}