{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:39.250555", "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": "2017-Aug-07_to_2017-Aug-09_289.0_49.0"}, "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": 2017080000256}, "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": "August 07 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2017"}, "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": 63427.59075460931}, "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": 49.0}, "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": 289.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 287.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 294.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "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": {"2017-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.53, 50.53], [-72.0, 50.75], [-71.75, 50.65], [-71.5, 50.75], [-70.97, 50.53], [-70.82, 50.18], [-70.5, 50.04], [-70.0, 50.25], [-69.75, 50.15], [-69.5, 50.25], [-68.97, 50.03], [-68.82, 49.68], [-68.47, 49.53], [-68.32, 49.18], [-68.25, 49.15], [-68.0, 49.25], [-67.75, 49.15], [-67.5, 49.25], [-67.25, 49.15], [-67.18, 49.18], [-67.03, 49.53], [-66.5, 49.75], [-66.25, 49.65], [-66.0, 49.75], [-65.47, 49.53], [-65.25, 49.0], [-65.47, 48.47], [-65.82, 48.32], [-65.97, 47.97], [-66.5, 47.75], [-66.75, 47.85], [-66.82, 47.82], [-66.85, 47.75], [-66.82, 47.68], [-66.47, 47.53], [-66.25, 47.0], [-66.47, 46.47], [-67.0, 46.25], [-67.5, 46.46], [-68.0, 46.25], [-68.53, 46.47], [-68.68, 46.82], [-68.75, 46.85], [-69.0, 46.75], [-69.53, 46.97], [-69.75, 47.5], [-69.65, 47.75], [-69.68, 47.82], [-69.75, 47.85], [-70.0, 47.75], [-70.25, 47.85], [-70.5, 47.75], [-70.75, 47.85], [-71.0, 47.75], [-71.53, 47.97], [-71.68, 48.32], [-72.03, 48.47], [-72.18, 48.82], [-72.53, 48.97], [-72.75, 49.5], [-72.65, 49.75], [-72.75, 50.0], [-72.53, 50.53]]]]}, "2017-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.53, 50.53], [-72.0, 50.75], [-71.75, 50.65], [-71.5, 50.75], [-70.97, 50.53], [-70.82, 50.18], [-70.5, 50.04], [-70.0, 50.25], [-69.75, 50.15], [-69.5, 50.25], [-68.97, 50.03], [-68.82, 49.68], [-68.47, 49.53], [-68.32, 49.18], [-68.25, 49.15], [-68.0, 49.25], [-67.75, 49.15], [-67.5, 49.25], [-67.25, 49.15], [-67.18, 49.18], [-67.03, 49.53], [-66.5, 49.75], [-66.25, 49.65], [-66.0, 49.75], [-65.47, 49.53], [-65.25, 49.0], [-65.47, 48.47], [-65.82, 48.32], [-65.97, 47.97], [-66.5, 47.75], [-66.75, 47.85], [-66.82, 47.82], [-66.85, 47.75], [-66.82, 47.68], [-66.47, 47.53], [-66.25, 47.0], [-66.47, 46.47], [-67.0, 46.25], [-67.5, 46.46], [-68.0, 46.25], [-68.53, 46.47], [-68.68, 46.82], [-68.75, 46.85], [-69.0, 46.75], [-69.53, 46.97], [-69.75, 47.5], [-69.65, 47.75], [-69.68, 47.82], [-69.75, 47.85], [-70.0, 47.75], [-70.25, 47.85], [-70.5, 47.75], [-70.75, 47.85], [-71.0, 47.75], [-71.53, 47.97], [-71.68, 48.32], [-72.03, 48.47], [-72.18, 48.82], [-72.53, 48.97], [-72.75, 49.5], [-72.65, 49.75], [-72.75, 50.0], [-72.53, 50.53]]]]}, "2017-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.53, 50.53], [-72.0, 50.75], [-71.75, 50.65], [-71.5, 50.75], [-70.97, 50.53], [-70.82, 50.18], [-70.5, 50.04], [-70.0, 50.25], [-69.75, 50.15], [-69.5, 50.25], [-68.97, 50.03], [-68.82, 49.68], [-68.47, 49.53], [-68.32, 49.18], [-68.25, 49.15], [-68.0, 49.25], [-67.75, 49.15], [-67.5, 49.25], [-67.25, 49.15], [-67.18, 49.18], [-67.03, 49.53], [-66.5, 49.75], [-66.25, 49.65], [-66.0, 49.75], [-65.47, 49.53], [-65.25, 49.0], [-65.47, 48.47], [-65.82, 48.32], [-65.97, 47.97], [-66.5, 47.75], [-66.75, 47.85], [-66.82, 47.82], [-66.85, 47.75], [-66.82, 47.68], [-66.47, 47.53], [-66.25, 47.0], [-66.47, 46.47], [-67.0, 46.25], [-67.5, 46.46], [-68.0, 46.25], [-68.53, 46.47], [-68.68, 46.82], [-68.75, 46.85], [-69.0, 46.75], [-69.53, 46.97], [-69.75, 47.5], [-69.65, 47.75], [-69.68, 47.82], [-69.75, 47.85], [-70.0, 47.75], [-70.25, 47.85], [-70.5, 47.75], [-70.75, 47.85], [-71.0, 47.75], [-71.53, 47.97], [-71.68, 48.32], [-72.03, 48.47], [-72.18, 48.82], [-72.53, 48.97], [-72.75, 49.5], [-72.65, 49.75], [-72.75, 50.0], [-72.53, 50.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.42006233240312}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.111793158461413}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.518210949359514, 12.432673981033531, 12.87282963789039]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.545286371829661, 10.954635054033417, 11.086961788284327]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.263850464826406, -4.287620150612816, -3.783908859945018]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.42006233240312, -5.118984924925542, -4.237489066946978]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6090059260451253, -1.5901681083668113, -1.3783227752988794]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.338034020819861, -1.8060352523055259, -1.567041241137815]}}