{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:34.838213", "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": "2022-Feb-22_to_2022-Feb-25_294.0_56.0"}, "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": 2022020000930}, "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": "February 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 76544.65249645629}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 56.0}, "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": 294.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "294.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 288.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 294.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-65.47, 57.53], [-65.25, 57.0], [-65.35, 56.75], [-65.25, 56.5], [-65.35, 56.25], [-65.25, 56.0], [-65.47, 55.47], [-66.0, 55.25], [-66.25, 55.35], [-66.32, 55.32], [-66.47, 54.97], [-67.0, 54.75], [-67.53, 54.97], [-67.68, 55.32], [-67.75, 55.35], [-67.82, 55.32], [-67.97, 54.97], [-68.5, 54.75], [-68.75, 54.85], [-69.0, 54.75], [-69.53, 54.97], [-69.68, 55.32], [-69.75, 55.35], [-70.0, 55.25], [-70.53, 55.47], [-70.68, 55.82], [-70.75, 55.85], [-71.0, 55.75], [-71.25, 55.85], [-71.32, 55.82], [-71.47, 55.47], [-72.0, 55.25], [-72.53, 55.47], [-72.75, 56.0], [-72.65, 56.25], [-72.75, 56.5], [-72.53, 57.03], [-72.18, 57.18], [-72.03, 57.53], [-71.5, 57.75], [-71.25, 57.65], [-71.18, 57.68], [-71.03, 58.03], [-70.5, 58.25], [-70.25, 58.15], [-70.0, 58.25], [-69.75, 58.15], [-69.5, 58.25], [-69.25, 58.15], [-69.0, 58.25], [-68.75, 58.15], [-68.5, 58.25], [-68.25, 58.15], [-68.0, 58.25], [-67.75, 58.15], [-67.5, 58.25], [-66.97, 58.03], [-66.82, 57.68], [-66.75, 57.65], [-66.5, 57.75], [-66.25, 57.65], [-66.0, 57.75], [-65.47, 57.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.75, 56.5], [-72.52999999999997, 57.03], [-72.18, 57.18], [-72.02999999999997, 57.53], [-71.5, 57.75], [-71.25, 57.65], [-71.18, 57.68], [-71.02999999999997, 58.03], [-70.5, 58.25], [-70.25, 58.15], [-70.0, 58.25], [-69.75, 58.15], [-69.5, 58.25], [-69.25, 58.15], [-69.0, 58.25], [-68.75, 58.15], [-68.5, 58.25], [-68.25, 58.15], [-68.0, 58.25], [-67.75, 58.15], [-67.5, 58.25], [-66.97000000000003, 58.03], [-66.82, 57.68], [-66.75, 57.65], [-66.5, 57.75], [-66.25, 57.65], [-66.0, 57.75], [-65.47000000000003, 57.53], [-65.25, 57.0], [-65.35000000000002, 56.75], [-65.25, 56.5], [-65.35000000000002, 56.25], [-65.25, 56.0], [-65.47000000000003, 55.47], [-66.0, 55.25], [-66.25, 55.35], [-66.32, 55.32], 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"Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.068831277897369}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-30.919145621191177, -29.766074525301832, -30.41267344342012, -28.60589328294634]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-32.56629873483783, -32.03835561820415, -32.593095549767554, -29.03737441762189]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.256567535456584, -8.446635101381501, -9.485756701641407, -9.147736506354164]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.875136806234025, -9.18753032691788, -10.112939217938845, -9.464875702083987]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3469965676731162, -1.2087398297093679, -1.3200414809975494, -1.2691894469471436]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5594992040625228, -1.2528636088487184, -1.433842556737898, -1.3338428110151643]}}