{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:25.298421", "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-14_277.0_47.0"}, "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": 2022020000598}, "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 14 2022"}, "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": 82000.4546559097}, "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": 47.0}, "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": 277.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 275.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 49.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-85.25, 49.0], [-85.03, 49.53], [-84.5, 49.75], [-84.25, 49.65], [-84.0, 49.75], [-83.75, 49.65], [-83.5, 49.75], [-83.25, 49.65], [-83.18, 49.68], [-83.03, 50.03], [-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], [-79.0, 50.25], [-78.47, 50.03], [-78.25, 49.5], [-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], [-80.47, 47.47], [-80.82, 47.32], [-80.97, 46.97], [-81.32, 46.82], [-81.47, 46.47], [-82.0, 46.25], [-82.25, 46.35], [-82.5, 46.25], [-82.75, 46.35], [-83.0, 46.25], [-83.25, 46.35], [-83.5, 46.25], [-83.75, 46.35], [-84.0, 46.25], [-84.53, 46.47], [-84.75, 47.0], [-84.53, 47.53], [-84.18, 47.68], [-84.04, 48.0], [-84.18, 48.32], [-84.25, 48.35], [-84.5, 48.25], [-85.03, 48.47], [-85.25, 49.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "E.North-America"]}, "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": [[[[-84.5, 48.25], [-85.02999999999997, 48.47], [-85.25, 49.0], [-85.02999999999997, 49.53], [-84.5, 49.75], [-84.25, 49.65], [-84.0, 49.75], [-83.75, 49.65], [-83.5, 49.75], [-83.25, 49.65], [-83.18, 49.68], [-83.02999999999997, 50.03], [-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], [-79.0, 50.25], [-78.47000000000003, 50.03], [-78.25, 49.5], [-78.47000000000003, 48.97], [-78.82, 48.82], [-78.97000000000003, 48.47], [-79.5, 48.25], [-79.80000000000001, 48.38], [-79.97000000000003, 47.97], [-80.32, 47.82], [-80.47000000000003, 47.47], [-80.82, 47.32], [-80.97000000000003, 46.97], [-81.32, 46.82], [-81.47000000000003, 46.47], [-82.0, 46.25], [-82.25, 46.35], [-82.5, 46.25], [-82.75, 46.35], [-83.0, 46.25], [-83.25, 46.35], [-83.5, 46.25], [-83.75, 46.35], [-84.0, 46.25], [-84.52999999999997, 46.47], [-84.75, 47.0], [-84.52999999999997, 47.53], [-84.18, 47.68], [-84.04000000000002, 48.0], [-84.18, 48.32], [-84.25, 48.35], [-84.5, 48.25]]]]}, "2022-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.5, 48.25], [-85.02999999999997, 48.47], [-85.25, 49.0], [-85.02999999999997, 49.53], [-84.5, 49.75], [-84.25, 49.65], [-84.0, 49.75], [-83.75, 49.65], [-83.5, 49.75], [-83.25, 49.65], [-83.18, 49.68], [-83.02999999999997, 50.03], [-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], [-79.0, 50.25], [-78.47000000000003, 50.03], [-78.25, 49.5], [-78.47000000000003, 48.97], [-78.82, 48.82], [-78.97000000000003, 48.47], [-79.5, 48.25], [-79.80000000000001, 48.38], [-79.97000000000003, 47.97], [-80.32, 47.82], [-80.47000000000003, 47.47], [-80.82, 47.32], [-80.97000000000003, 46.97], [-81.32, 46.82], [-81.47000000000003, 46.47], [-82.0, 46.25], [-82.25, 46.35], [-82.5, 46.25], [-82.75, 46.35], [-83.0, 46.25], [-83.25, 46.35], [-83.5, 46.25], [-83.75, 46.35], [-84.0, 46.25], [-84.52999999999997, 46.47], [-84.75, 47.0], [-84.52999999999997, 47.53], [-84.18, 47.68], [-84.04000000000002, 48.0], [-84.18, 48.32], [-84.25, 48.35], [-84.5, 48.25]]]]}, "2022-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-84.5, 48.25], [-85.02999999999997, 48.47], [-85.25, 49.0], [-85.02999999999997, 49.53], [-84.5, 49.75], [-84.25, 49.65], [-84.0, 49.75], [-83.75, 49.65], [-83.5, 49.75], [-83.25, 49.65], [-83.18, 49.68], [-83.02999999999997, 50.03], [-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], [-79.0, 50.25], [-78.47000000000003, 50.03], [-78.25, 49.5], [-78.47000000000003, 48.97], [-78.82, 48.82], [-78.97000000000003, 48.47], [-79.5, 48.25], [-79.80000000000001, 48.38], [-79.97000000000003, 47.97], [-80.32, 47.82], [-80.47000000000003, 47.47], [-80.82, 47.32], [-80.97000000000003, 46.97], [-81.32, 46.82], [-81.47000000000003, 46.47], [-82.0, 46.25], [-82.25, 46.35], [-82.5, 46.25], [-82.75, 46.35], [-83.0, 46.25], [-83.25, 46.35], [-83.5, 46.25], [-83.75, 46.35], [-84.0, 46.25], [-84.52999999999997, 46.47], [-84.75, 47.0], [-84.52999999999997, 47.53], [-84.18, 47.68], [-84.04000000000002, 48.0], [-84.18, 48.32], [-84.25, 48.35], [-84.5, 48.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.828050519336244}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -10.87636515078358}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-24.998526040070345, -27.769414980624617, -24.12621600648933]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-27.144431686698226, -29.3108460692512, -26.462193951093013]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.165981726534147, -12.916554892758649, -9.546558833057938]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.130710836841814, -14.828050519336244, -10.491829238345161]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.529396332184247, -1.9503054393478554, -1.4210147583063466]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8191782925802242, -2.3636045644941097, -1.6712148940713263]}}