{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:27.946607", "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-May-18_to_2025-May-20_279.5_50.5"}, "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": 2025050000374}, "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": "May 18 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 20 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": 127736.75010302401}, "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": ["Hudson Bay"]}, "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": 50.5}, "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": 279.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "279.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 276.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.53, 50.53], [-83.18, 50.68], [-83.15, 50.75], [-83.18, 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47.75], [-81.75, 47.85], [-82.0, 47.75], [-82.53, 47.97], [-82.68, 48.32], [-83.03, 48.47], [-83.18, 48.82], [-83.53, 48.97], [-83.75, 49.5], [-83.65, 49.75], [-83.75, 50.0], [-83.53, 50.53]], [[-80.75, 49.85], [-80.82, 49.82], [-80.85, 49.75], [-80.82, 49.68], [-80.75, 49.65], [-80.5, 49.75], [-80.75, 49.85]]]]}, "2025-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.53, 50.53], [-83.18, 50.68], [-83.15, 50.75], [-83.18, 50.82], [-83.53, 50.97], [-83.75, 51.5], [-83.65, 51.75], [-83.75, 52.0], [-83.65, 52.25], [-83.75, 52.5], [-83.65, 52.75], [-83.75, 53.0], [-83.53, 53.53], [-83.18, 53.68], [-83.15, 53.75], [-83.25, 54.0], [-83.15, 54.25], [-83.25, 54.5], [-83.15, 54.75], [-83.25, 55.0], [-83.03, 55.53], [-82.5, 55.75], [-81.97, 55.53], [-81.82, 55.18], [-81.47, 55.03], [-81.32, 54.68], [-80.97, 54.53], [-80.82, 54.18], [-80.47, 54.03], [-80.25, 53.5], [-80.35, 53.25], [-80.32, 53.18], [-79.97, 53.03], [-79.75, 52.5], [-79.85, 52.25], [-79.75, 52.0], 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[-7.018867938202703, -8.508258623970095, -6.28377848930165]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.933915264194297, -11.103124696256486, -7.596964451661393]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4481430755441216, -1.7333571141724622, -1.312392422654764]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7212507902967373, -1.982777907211071, -1.5716181138459746]}}