{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:29:15.596215", "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-12_to_2022-Feb-15_274.0_49.0"}, "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": 2022020000559}, "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 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 15 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": 129259.30330484826}, "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"]}, "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": 49.0}, "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": 274.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "274.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.25, 49.5], [-87.03, 50.03], [-86.68, 50.18], [-86.53, 50.53], [-86.0, 50.75], [-85.47, 50.53], [-85.32, 50.18], [-85.0, 50.04], [-84.5, 50.25], [-84.25, 50.15], [-84.0, 50.25], [-83.75, 50.15], [-83.5, 50.25], [-83.25, 50.15], [-83.0, 50.25], [-82.75, 50.15], [-82.5, 50.25], [-82.25, 50.15], [-82.0, 50.25], [-81.75, 50.15], [-81.5, 50.25], [-81.25, 50.15], [-81.0, 50.25], [-80.75, 50.15], [-80.5, 50.25], [-80.25, 50.15], [-80.0, 50.25], [-79.75, 50.15], [-79.5, 50.25], [-79.25, 50.15], [-79.18, 50.18], [-79.03, 50.53], [-78.5, 50.75], [-77.97, 50.53], [-77.75, 50.0], [-77.97, 49.47], [-78.32, 49.32], [-78.47, 48.97], [-78.82, 48.82], [-78.97, 48.47], [-79.5, 48.25], [-79.8, 48.38], [-79.97, 47.97], [-80.32, 47.82], [-80.35, 47.75], [-80.25, 47.5], [-80.47, 46.97], [-80.82, 46.82], [-80.97, 46.47], [-81.32, 46.32], [-81.47, 45.97], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-82.75, 45.85], [-83.0, 45.75], [-83.25, 45.85], [-83.5, 45.75], [-83.75, 45.85], [-84.0, 45.75], [-84.53, 45.97], [-84.75, 46.5], [-84.65, 46.75], [-84.75, 47.0], [-84.65, 47.25], [-84.68, 47.32], [-85.03, 47.47], [-85.25, 48.0], [-85.12, 48.3], [-85.5, 48.46], [-86.0, 48.25], [-86.53, 48.47], [-86.68, 48.82], [-87.03, 48.97], [-87.25, 49.5]]]]}, "2022-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.25, 49.5], [-87.03, 50.03], [-86.68, 50.18], [-86.53, 50.53], [-86.0, 50.75], [-85.47, 50.53], [-85.32, 50.18], [-85.0, 50.04], [-84.5, 50.25], [-84.25, 50.15], [-84.0, 50.25], [-83.75, 50.15], [-83.5, 50.25], [-83.25, 50.15], [-83.0, 50.25], [-82.75, 50.15], [-82.5, 50.25], [-82.25, 50.15], [-82.0, 50.25], [-81.75, 50.15], [-81.5, 50.25], [-81.25, 50.15], [-81.0, 50.25], [-80.75, 50.15], [-80.5, 50.25], [-80.25, 50.15], [-80.0, 50.25], [-79.75, 50.15], [-79.5, 50.25], [-79.25, 50.15], [-79.18, 50.18], [-79.03, 50.53], [-78.5, 50.75], [-77.97, 50.53], [-77.75, 50.0], [-77.97, 49.47], [-78.32, 49.32], [-78.47, 48.97], [-78.82, 48.82], [-78.97, 48.47], [-79.5, 48.25], [-79.8, 48.38], [-79.97, 47.97], [-80.32, 47.82], [-80.35, 47.75], [-80.25, 47.5], [-80.47, 46.97], [-80.82, 46.82], [-80.97, 46.47], [-81.32, 46.32], [-81.47, 45.97], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-82.75, 45.85], [-83.0, 45.75], [-83.25, 45.85], [-83.5, 45.75], [-83.75, 45.85], [-84.0, 45.75], [-84.53, 45.97], [-84.75, 46.5], [-84.65, 46.75], [-84.75, 47.0], [-84.65, 47.25], [-84.68, 47.32], [-85.03, 47.47], [-85.25, 48.0], [-85.12, 48.3], [-85.5, 48.46], [-86.0, 48.25], [-86.53, 48.47], [-86.68, 48.82], [-87.03, 48.97], [-87.25, 49.5]]]]}, "2022-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-87.25, 49.5], [-87.03, 50.03], [-86.68, 50.18], [-86.53, 50.53], [-86.0, 50.75], [-85.47, 50.53], [-85.32, 50.18], [-85.0, 50.04], [-84.5, 50.25], [-84.25, 50.15], [-84.0, 50.25], [-83.75, 50.15], [-83.5, 50.25], [-83.25, 50.15], [-83.0, 50.25], [-82.75, 50.15], [-82.5, 50.25], [-82.25, 50.15], [-82.0, 50.25], [-81.75, 50.15], [-81.5, 50.25], [-81.25, 50.15], [-81.0, 50.25], [-80.75, 50.15], [-80.5, 50.25], [-80.25, 50.15], [-80.0, 50.25], [-79.75, 50.15], [-79.5, 50.25], [-79.25, 50.15], [-79.18, 50.18], [-79.03, 50.53], [-78.5, 50.75], [-77.97, 50.53], [-77.75, 50.0], [-77.97, 49.47], [-78.32, 49.32], [-78.47, 48.97], [-78.82, 48.82], [-78.97, 48.47], [-79.5, 48.25], [-79.8, 48.38], [-79.97, 47.97], [-80.32, 47.82], [-80.35, 47.75], [-80.25, 47.5], [-80.47, 46.97], [-80.82, 46.82], [-80.97, 46.47], [-81.32, 46.32], [-81.47, 45.97], [-82.0, 45.75], [-82.25, 45.85], [-82.5, 45.75], [-82.75, 45.85], [-83.0, 45.75], [-83.25, 45.85], [-83.5, 45.75], [-83.75, 45.85], [-84.0, 45.75], [-84.53, 45.97], [-84.75, 46.5], [-84.65, 46.75], [-84.75, 47.0], [-84.65, 47.25], [-84.68, 47.32], [-85.03, 47.47], [-85.25, 48.0], [-85.12, 48.3], [-85.5, 48.46], [-86.0, 48.25], [-86.53, 48.47], [-86.68, 48.82], [-87.03, 48.97], [-87.25, 49.5]]]]}, "2022-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.0, 49.75], [-85.47, 49.53], [-85.25, 49.0], [-85.47, 48.47], [-86.0, 48.25], [-86.53, 48.47], [-86.75, 49.0], [-86.53, 49.53], [-86.0, 49.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.703801005126564}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.590176679595562}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-24.81542375308473, -27.458879055525728, -23.76821187978649, -22.634639114440716]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-27.686723220128073, -29.3108460692512, -26.462193951093013, -22.634639114440716]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.865894608406238, -13.71922479468875, -10.226474922944558, -9.003126582665033]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-13.143667538707206, -15.703801005126564, -14.122012269370998, -9.003126582665033]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5947523277842899, -2.0269604766109133, -1.5395999205268096, -1.3258764708911988]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9599777257307913, -2.4625433458636903, -2.292965468395192, -1.3258764708911988]}}