{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:59.080463", "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-May-05_to_2022-May-07_286.5_51.0"}, "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": 2022050000262}, "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 05 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 07 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": 100424.64454466723}, "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": 51.0}, "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": 286.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "286.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 286.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 291.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-74.75, 51.0], [-74.53, 51.53], [-74.0, 51.75], [-73.75, 51.65], [-73.62, 51.7], [-73.75, 52.0], [-73.53, 52.53], [-73.18, 52.68], [-73.03, 53.03], [-72.68, 53.18], [-72.53, 53.53], [-72.0, 53.75], [-71.75, 53.65], [-71.5, 53.75], [-71.25, 53.65], [-71.0, 53.75], [-70.75, 53.65], [-70.5, 53.75], [-69.97, 53.53], [-69.82, 53.18], [-69.75, 53.15], [-69.5, 53.25], [-69.25, 53.15], [-69.0, 53.25], [-68.47, 53.03], [-68.25, 52.5], [-68.47, 51.97], [-68.82, 51.82], [-68.96, 51.5], [-68.75, 51.0], [-68.85, 50.75], [-68.75, 50.5], [-68.97, 49.97], [-69.32, 49.82], [-69.47, 49.47], [-70.0, 49.25], [-70.25, 49.35], [-70.5, 49.25], [-70.75, 49.35], [-70.82, 49.32], [-70.97, 48.97], [-71.5, 48.75], [-72.0, 48.96], [-72.5, 48.75], [-72.75, 48.85], [-73.0, 48.75], [-73.53, 48.97], [-73.75, 49.5], [-73.53, 50.03], [-73.18, 50.18], [-73.15, 50.25], [-73.18, 50.32], [-73.25, 50.35], [-73.5, 50.25], [-73.75, 50.35], [-74.0, 50.25], [-74.53, 50.47], [-74.75, 51.0]]]]}}, "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": {"2022-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.0, 50.25], [-74.52999999999997, 50.47], [-74.75, 51.0], [-74.52999999999997, 51.53], [-74.0, 51.75], [-73.75, 51.65], [-73.62, 51.7], [-73.75, 52.0], [-73.52999999999997, 52.53], [-73.18, 52.68], [-73.02999999999997, 53.03], [-72.68, 53.18], [-72.52999999999997, 53.53], [-72.0, 53.75], [-71.75, 53.65], [-71.5, 53.75], [-71.25, 53.65], [-71.0, 53.75], [-70.75, 53.65], [-70.5, 53.75], [-69.97000000000003, 53.53], [-69.82, 53.18], [-69.75, 53.15], [-69.5, 53.25], [-69.25, 53.15], [-69.0, 53.25], [-68.47000000000003, 53.03], [-68.25, 52.5], [-68.47000000000003, 51.97], [-68.82, 51.82], [-68.95999999999998, 51.5], [-68.75, 51.0], [-68.85000000000002, 50.75], [-68.75, 50.5], [-68.97000000000003, 49.97], [-69.32, 49.82], [-69.47000000000003, 49.47], [-70.0, 49.25], [-70.25, 49.35], [-70.5, 49.25], [-70.75, 49.35], [-70.82, 49.32], [-70.97000000000003, 48.97], [-71.5, 48.75], [-72.0, 48.96], [-72.5, 48.75], [-72.75, 48.85], [-73.0, 48.75], [-73.52999999999997, 48.97], [-73.75, 49.5], [-73.52999999999997, 50.03], [-73.18, 50.18], [-73.14999999999998, 50.25], [-73.18, 50.32], [-73.25, 50.35], [-73.5, 50.25], [-73.75, 50.35], [-74.0, 50.25]]]]}, "2022-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.0, 50.25], [-74.52999999999997, 50.47], [-74.75, 51.0], [-74.52999999999997, 51.53], [-74.0, 51.75], [-73.75, 51.65], [-73.62, 51.7], [-73.75, 52.0], [-73.52999999999997, 52.53], [-73.18, 52.68], [-73.02999999999997, 53.03], [-72.68, 53.18], [-72.52999999999997, 53.53], [-72.0, 53.75], [-71.75, 53.65], [-71.5, 53.75], [-71.25, 53.65], [-71.0, 53.75], [-70.75, 53.65], [-70.5, 53.75], [-69.97000000000003, 53.53], [-69.82, 53.18], [-69.75, 53.15], [-69.5, 53.25], [-69.25, 53.15], [-69.0, 53.25], [-68.47000000000003, 53.03], [-68.25, 52.5], [-68.47000000000003, 51.97], [-68.82, 51.82], [-68.95999999999998, 51.5], [-68.75, 51.0], [-68.85000000000002, 50.75], [-68.75, 50.5], [-68.97000000000003, 49.97], [-69.32, 49.82], [-69.47000000000003, 49.47], [-70.0, 49.25], [-70.25, 49.35], [-70.5, 49.25], [-70.75, 49.35], [-70.82, 49.32], [-70.97000000000003, 48.97], [-71.5, 48.75], [-72.0, 48.96], [-72.5, 48.75], [-72.75, 48.85], [-73.0, 48.75], [-73.52999999999997, 48.97], [-73.75, 49.5], [-73.52999999999997, 50.03], [-73.18, 50.18], [-73.14999999999998, 50.25], [-73.18, 50.32], [-73.25, 50.35], [-73.5, 50.25], [-73.75, 50.35], [-74.0, 50.25]]]]}, "2022-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.0, 50.25], [-74.52999999999997, 50.47], [-74.75, 51.0], [-74.52999999999997, 51.53], [-74.0, 51.75], [-73.75, 51.65], [-73.62, 51.7], [-73.75, 52.0], [-73.52999999999997, 52.53], [-73.18, 52.68], [-73.02999999999997, 53.03], [-72.68, 53.18], [-72.52999999999997, 53.53], [-72.0, 53.75], [-71.75, 53.65], [-71.5, 53.75], [-71.25, 53.65], [-71.0, 53.75], [-70.75, 53.65], [-70.5, 53.75], [-69.97000000000003, 53.53], [-69.82, 53.18], [-69.75, 53.15], [-69.5, 53.25], [-69.25, 53.15], [-69.0, 53.25], [-68.47000000000003, 53.03], [-68.25, 52.5], [-68.47000000000003, 51.97], [-68.82, 51.82], [-68.95999999999998, 51.5], [-68.75, 51.0], [-68.85000000000002, 50.75], [-68.75, 50.5], [-68.97000000000003, 49.97], [-69.32, 49.82], [-69.47000000000003, 49.47], [-70.0, 49.25], [-70.25, 49.35], [-70.5, 49.25], [-70.75, 49.35], [-70.82, 49.32], [-70.97000000000003, 48.97], [-71.5, 48.75], [-72.0, 48.96], [-72.5, 48.75], [-72.75, 48.85], [-73.0, 48.75], [-73.52999999999997, 48.97], [-73.75, 49.5], [-73.52999999999997, 50.03], [-73.18, 50.18], [-73.14999999999998, 50.25], [-73.18, 50.32], [-73.25, 50.35], [-73.5, 50.25], [-73.75, 50.35], [-74.0, 50.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.9754853115011315}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.440543821202088}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.775785546506768, -2.6782337158402925, -2.273973232289336]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.070884383150428, -6.374885477323744, -4.923719348682084]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.472196888267248, -5.566088113873816, -5.283346461465181]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.903079181447993, -6.9754853115011315, -5.916611585732539]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5129897543568254, -1.5295369545952657, -1.443222091831045]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.132525661635022, -1.7798896946046883, -1.6559400424459152]}}