{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:31.768020", "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": "2025-Aug-17_to_2025-Aug-19_288.5_50.0"}, "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": 2025080000560}, "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 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 19 2025"}, "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": 69580.44180798976}, "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": []}, "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": 50.0}, "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": 288.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "288.5\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": 291.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.62, 51.2], [-73.75, 51.5], [-73.53, 52.03], [-73.0, 52.25], [-72.75, 52.15], [-72.68, 52.18], [-72.53, 52.53], [-72.18, 52.68], [-72.03, 53.03], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-70.25, 53.15], [-70.18, 53.18], [-70.03, 53.53], [-69.5, 53.75], [-68.97, 53.53], [-68.82, 53.18], [-68.47, 53.03], [-68.25, 52.5], [-68.47, 51.97], [-69.0, 51.75], [-69.25, 51.85], [-69.32, 51.82], [-69.35, 51.75], [-69.25, 51.5], [-69.47, 50.97], [-69.82, 50.82], [-69.97, 50.47], [-70.32, 50.32], [-70.47, 49.97], [-70.82, 49.82], [-70.97, 49.47], [-71.5, 49.25], [-71.75, 49.35], [-72.0, 49.25], [-72.25, 49.35], [-72.5, 49.25], [-72.75, 49.35], [-73.0, 49.25], [-73.25, 49.35], [-73.5, 49.25], [-73.75, 49.35], [-74.0, 49.25], [-74.53, 49.47], [-74.75, 50.0], [-74.53, 50.53], [-74.18, 50.68], [-74.03, 51.03], [-73.62, 51.2]]]]}, "2025-08-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.62, 51.2], [-73.75, 51.5], [-73.53, 52.03], [-73.0, 52.25], [-72.75, 52.15], [-72.68, 52.18], [-72.53, 52.53], [-72.18, 52.68], [-72.03, 53.03], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-70.25, 53.15], [-70.18, 53.18], [-70.03, 53.53], [-69.5, 53.75], [-68.97, 53.53], [-68.82, 53.18], [-68.47, 53.03], [-68.25, 52.5], [-68.47, 51.97], [-69.0, 51.75], [-69.25, 51.85], [-69.32, 51.82], [-69.35, 51.75], [-69.25, 51.5], [-69.47, 50.97], [-69.82, 50.82], [-69.97, 50.47], [-70.32, 50.32], [-70.47, 49.97], [-70.82, 49.82], [-70.97, 49.47], [-71.5, 49.25], [-71.75, 49.35], [-72.0, 49.25], [-72.25, 49.35], [-72.5, 49.25], [-72.75, 49.35], [-73.0, 49.25], [-73.25, 49.35], [-73.5, 49.25], [-73.75, 49.35], [-74.0, 49.25], [-74.53, 49.47], [-74.75, 50.0], [-74.53, 50.53], [-74.18, 50.68], [-74.03, 51.03], [-73.62, 51.2]]]]}, "2025-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.62, 51.2], [-73.75, 51.5], [-73.53, 52.03], [-73.0, 52.25], [-72.75, 52.15], [-72.68, 52.18], [-72.53, 52.53], [-72.18, 52.68], [-72.03, 53.03], [-71.5, 53.25], [-71.25, 53.15], [-71.0, 53.25], [-70.75, 53.15], [-70.5, 53.25], [-70.25, 53.15], [-70.18, 53.18], [-70.03, 53.53], [-69.5, 53.75], [-68.97, 53.53], [-68.82, 53.18], [-68.47, 53.03], [-68.25, 52.5], [-68.47, 51.97], [-69.0, 51.75], [-69.25, 51.85], [-69.32, 51.82], [-69.35, 51.75], [-69.25, 51.5], [-69.47, 50.97], [-69.82, 50.82], [-69.97, 50.47], [-70.32, 50.32], [-70.47, 49.97], [-70.82, 49.82], [-70.97, 49.47], [-71.5, 49.25], [-71.75, 49.35], [-72.0, 49.25], [-72.25, 49.35], [-72.5, 49.25], [-72.75, 49.35], [-73.0, 49.25], [-73.25, 49.35], [-73.5, 49.25], [-73.75, 49.35], [-74.0, 49.25], [-74.53, 49.47], [-74.75, 50.0], [-74.53, 50.53], [-74.18, 50.68], [-74.03, 51.03], [-73.62, 51.2]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.7958741946365535}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.014016555611568}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.431127590603296, 7.531393941243493, 8.814247526945906]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.624012247721396, 5.505921936035179, 7.364002482096396]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.27280747704965, -6.058424609258982, -4.710817580526072]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.979765317374813, -6.7958741946365535, -5.6867892554880655]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4631497532425823, -2.069665108429803, -1.636285894093607]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6915700400986893, -2.31499728780953, -2.067805225318133]}}