{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:14.785552", "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-Jul-31_to_2025-Aug-02_292.5_52.0"}, "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": 2025070001111}, "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": "July 31 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 02 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": 71778.24763579304}, "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": 52.0}, "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": 292.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "292.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 287.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 295.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.0, 50.25], [-71.75, 50.15], [-71.68, 50.18], [-71.54, 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48.85], [-71.5, 48.75], [-71.75, 48.85], [-71.82, 48.82], [-71.97, 48.47], [-72.5, 48.25], [-73.03, 48.47], [-73.25, 49.0], [-73.03, 49.53], [-72.68, 49.68], [-72.53, 50.03], [-72.0, 50.25]]]]}, "2025-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.0, 50.25], [-71.75, 50.15], [-71.68, 50.18], [-71.54, 50.5], [-71.75, 51.0], [-71.65, 51.25], [-71.75, 51.5], [-71.53, 52.03], [-71.0, 52.25], [-70.75, 52.15], [-70.5, 52.25], [-70.25, 52.15], [-70.0, 52.25], [-69.75, 52.15], [-69.68, 52.18], [-69.53, 52.53], [-69.0, 52.75], [-68.75, 52.65], [-68.5, 52.75], [-68.25, 52.65], [-68.0, 52.75], [-67.75, 52.65], [-67.68, 52.68], [-67.53, 53.03], [-67.0, 53.25], [-66.75, 53.15], [-66.5, 53.25], [-65.97, 53.03], [-65.75, 52.5], [-65.85, 52.25], [-65.82, 52.18], [-65.75, 52.15], [-65.68, 52.18], [-65.53, 52.53], [-65.0, 52.75], [-64.47, 52.53], [-64.25, 52.0], [-64.35, 51.75], [-64.25, 51.5], [-64.47, 50.97], [-65.0, 50.75], [-65.25, 50.85], [-65.5, 50.75], [-65.75, 50.85], [-66.0, 50.75], [-66.25, 50.85], [-66.5, 50.75], [-66.8, 50.88], [-66.97, 50.47], [-67.5, 50.25], [-67.8, 50.38], [-67.97, 49.97], [-68.5, 49.75], [-68.75, 49.85], [-69.0, 49.75], [-69.25, 49.85], [-69.5, 49.75], [-69.75, 49.85], [-69.82, 49.82], [-69.97, 49.47], [-70.32, 49.32], [-70.47, 48.97], [-71.0, 48.75], [-71.25, 48.85], [-71.5, 48.75], [-71.75, 48.85], [-71.82, 48.82], [-71.97, 48.47], [-72.5, 48.25], [-73.03, 48.47], [-73.25, 49.0], [-73.03, 49.53], [-72.68, 49.68], [-72.53, 50.03], [-72.0, 50.25]]]]}, "2025-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.0, 50.25], [-71.75, 50.15], [-71.68, 50.18], [-71.54, 50.5], [-71.75, 51.0], [-71.65, 51.25], [-71.75, 51.5], [-71.53, 52.03], [-71.0, 52.25], [-70.75, 52.15], [-70.5, 52.25], [-70.25, 52.15], [-70.0, 52.25], [-69.75, 52.15], [-69.68, 52.18], [-69.53, 52.53], [-69.0, 52.75], [-68.75, 52.65], [-68.5, 52.75], [-68.25, 52.65], [-68.0, 52.75], [-67.75, 52.65], [-67.68, 52.68], [-67.53, 53.03], [-67.0, 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"mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.382968023611595}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.295573308446478, 10.793719881074992, 11.851636883160097]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.43138147989913, 9.05725758870443, 10.395478820800804]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.065538831888186, -4.558097331718809, -3.5252679072277915]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.955735446103347, -5.272347785979605, -3.977848994190822]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0108660963363563, -1.7913111477053782, -1.3640235420742248]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3059889373612457, -2.0788766772313574, -1.4962098010812674]}}