{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:29.249884", "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": "2020-Apr-15_to_2020-Apr-17_286.5_52.5"}, "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": 2020040000429}, "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": "April 15 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 17 2020"}, "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": 168295.26105076776}, "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", "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": []}, "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": 52.5}, "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": 286.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "286.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 282.25}, "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": 49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.03, 53.03], [-77.68, 53.18], [-77.53, 53.53], [-77.0, 53.75], [-76.75, 53.65], [-76.5, 53.75], [-76.25, 53.65], [-76.0, 53.75], [-75.75, 53.65], [-75.68, 53.68], [-75.53, 54.03], [-75.0, 54.25], [-74.75, 54.15], [-74.5, 54.25], [-74.25, 54.15], [-74.0, 54.25], [-73.75, 54.15], [-73.5, 54.25], [-72.97, 54.03], [-72.82, 53.68], [-72.75, 53.65], [-72.5, 53.75], [-71.97, 53.53], [-71.82, 53.18], [-71.75, 53.15], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-70.25, 53.15], [-70.0, 53.25], [-69.47, 53.03], [-69.32, 52.68], [-68.97, 52.53], [-68.75, 52.0], [-68.97, 51.47], [-69.32, 51.32], [-69.47, 50.97], [-70.0, 50.75], [-70.25, 50.85], [-70.32, 50.82], [-70.47, 50.47], [-70.82, 50.32], [-70.97, 49.97], [-71.5, 49.75], [-71.75, 49.85], [-72.0, 49.75], [-72.25, 49.85], [-72.32, 49.82], [-72.47, 49.47], [-72.82, 49.32], [-72.97, 48.97], [-73.5, 48.75], [-74.03, 48.97], [-74.18, 49.32], [-74.25, 49.35], [-74.5, 49.25], [-75.03, 49.47], [-75.18, 49.82], [-75.25, 49.85], [-75.5, 49.75], [-75.75, 49.85], [-76.0, 49.75], [-76.53, 49.97], [-76.75, 50.5], [-76.65, 50.75], [-76.68, 50.82], [-76.75, 50.85], [-77.0, 50.75], [-77.53, 50.97], [-77.68, 51.32], [-78.03, 51.47], [-78.25, 52.0], [-78.15, 52.25], [-78.25, 52.5], [-78.03, 53.03]]]]}, "2020-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.03, 53.03], [-77.68, 53.18], [-77.53, 53.53], [-77.0, 53.75], [-76.75, 53.65], [-76.5, 53.75], [-76.25, 53.65], [-76.0, 53.75], [-75.75, 53.65], [-75.68, 53.68], [-75.53, 54.03], [-75.0, 54.25], [-74.75, 54.15], [-74.5, 54.25], [-74.25, 54.15], [-74.0, 54.25], [-73.75, 54.15], [-73.5, 54.25], [-72.97, 54.03], [-72.82, 53.68], [-72.75, 53.65], [-72.5, 53.75], [-71.97, 53.53], [-71.82, 53.18], [-71.75, 53.15], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-70.25, 53.15], [-70.0, 53.25], [-69.47, 53.03], [-69.32, 52.68], [-68.97, 52.53], [-68.75, 52.0], [-68.97, 51.47], [-69.32, 51.32], [-69.47, 50.97], [-70.0, 50.75], [-70.25, 50.85], [-70.32, 50.82], [-70.47, 50.47], [-70.82, 50.32], [-70.97, 49.97], [-71.5, 49.75], [-71.75, 49.85], [-72.0, 49.75], [-72.25, 49.85], [-72.32, 49.82], [-72.47, 49.47], [-72.82, 49.32], [-72.97, 48.97], [-73.5, 48.75], [-74.03, 48.97], [-74.18, 49.32], [-74.25, 49.35], [-74.5, 49.25], [-75.03, 49.47], [-75.18, 49.82], [-75.25, 49.85], [-75.5, 49.75], [-75.75, 49.85], [-76.0, 49.75], [-76.53, 49.97], [-76.75, 50.5], [-76.65, 50.75], [-76.68, 50.82], [-76.75, 50.85], [-77.0, 50.75], [-77.53, 50.97], [-77.68, 51.32], [-78.03, 51.47], [-78.25, 52.0], [-78.15, 52.25], [-78.25, 52.5], [-78.03, 53.03]]]]}, "2020-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.03, 53.03], [-77.68, 53.18], [-77.53, 53.53], [-77.0, 53.75], [-76.75, 53.65], [-76.5, 53.75], [-76.25, 53.65], [-76.0, 53.75], [-75.75, 53.65], [-75.68, 53.68], [-75.53, 54.03], [-75.0, 54.25], [-74.75, 54.15], [-74.5, 54.25], [-74.25, 54.15], [-74.0, 54.25], [-73.75, 54.15], [-73.5, 54.25], [-72.97, 54.03], [-72.82, 53.68], [-72.75, 53.65], [-72.5, 53.75], [-71.97, 53.53], [-71.82, 53.18], [-71.75, 53.15], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-70.25, 53.15], [-70.0, 53.25], [-69.47, 53.03], [-69.32, 52.68], [-68.97, 52.53], [-68.75, 52.0], [-68.97, 51.47], [-69.32, 51.32], [-69.47, 50.97], [-70.0, 50.75], [-70.25, 50.85], [-70.32, 50.82], [-70.47, 50.47], [-70.82, 50.32], [-70.97, 49.97], [-71.5, 49.75], [-71.75, 49.85], [-72.0, 49.75], [-72.25, 49.85], [-72.32, 49.82], [-72.47, 49.47], [-72.82, 49.32], [-72.97, 48.97], [-73.5, 48.75], [-74.03, 48.97], [-74.18, 49.32], [-74.25, 49.35], [-74.5, 49.25], [-75.03, 49.47], [-75.18, 49.82], [-75.25, 49.85], [-75.5, 49.75], [-75.75, 49.85], [-76.0, 49.75], [-76.53, 49.97], [-76.75, 50.5], [-76.65, 50.75], [-76.68, 50.82], [-76.75, 50.85], [-77.0, 50.75], [-77.53, 50.97], [-77.68, 51.32], [-78.03, 51.47], [-78.25, 52.0], [-78.15, 52.25], [-78.25, 52.5], [-78.03, 53.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.176546666935167}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.779199574051855}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-10.821169360821841, -10.01202622239009, -9.394959801350353]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.166550604540646, -13.16532631643571, -12.027503558928117]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.280910635510327, -7.741334244909385, -7.315353841735848]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.568169986472299, -10.176546666935167, -8.318740825679129]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8279350311707716, -1.7095611588613673, -1.6419103718270833]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.104337760447999, -1.987051506561344, -1.9335305741215192]}}