{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:21.610306", "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": "2024-Dec-04_to_2024-Dec-06_287.0_25.0"}, "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": 2024120000136}, "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": "December 04 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 06 2024"}, "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": 50592.39421104032}, "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": ["Bahamas"]}, "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": ["Atlantic Ocean"]}, "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": 25.0}, "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": 287.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "287.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 289.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-74.53, 25.03], [-74.18, 25.18], [-74.03, 25.53], [-73.5, 25.75], [-73.25, 25.65], [-73.18, 25.68], [-73.03, 26.03], [-72.5, 26.25], [-72.25, 26.15], [-72.0, 26.25], [-71.75, 26.15], [-71.5, 26.25], [-71.25, 26.15], [-71.0, 26.25], [-70.47, 26.03], [-70.25, 25.5], [-70.47, 24.97], [-71.0, 24.75], [-71.25, 24.85], [-71.32, 24.82], [-71.47, 24.47], [-71.82, 24.32], [-71.97, 23.97], [-72.5, 23.75], [-72.75, 23.85], [-72.82, 23.82], [-72.97, 23.47], [-73.32, 23.32], [-73.47, 22.97], [-74.0, 22.75], [-74.25, 22.85], [-74.5, 22.75], [-74.75, 22.85], [-75.0, 22.75], [-75.53, 22.97], [-75.75, 23.5], [-75.53, 24.03], [-75.18, 24.18], [-75.03, 24.53], [-74.68, 24.68], [-74.53, 25.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America", "Caribbean", "N.Atlantic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, 24.53], [-74.68, 24.68], [-74.52999999999997, 25.03], [-74.18, 25.18], [-74.02999999999997, 25.53], [-73.5, 25.75], [-73.25, 25.65], [-73.18, 25.68], [-73.02999999999997, 26.03], [-72.5, 26.25], [-72.25, 26.15], [-72.0, 26.25], [-71.75, 26.15], [-71.5, 26.25], [-71.25, 26.15], [-71.0, 26.25], [-70.47000000000003, 26.03], [-70.25, 25.5], [-70.47000000000003, 24.97], [-71.0, 24.75], [-71.25, 24.85], [-71.32, 24.82], [-71.47000000000003, 24.47], [-71.82, 24.32], [-71.97000000000003, 23.97], [-72.5, 23.75], [-72.75, 23.85], [-72.82, 23.82], [-72.97000000000003, 23.47], [-73.32, 23.32], [-73.47000000000003, 22.97], [-74.0, 22.75], [-74.25, 22.85], [-74.5, 22.75], [-74.75, 22.85], [-75.0, 22.75], [-75.52999999999997, 22.97], [-75.75, 23.5], [-75.52999999999997, 24.03], [-75.18, 24.18], [-75.02999999999997, 24.53]]]]}, "2024-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, 24.53], [-74.68, 24.68], [-74.52999999999997, 25.03], [-74.18, 25.18], [-74.02999999999997, 25.53], [-73.5, 25.75], [-73.25, 25.65], [-73.18, 25.68], [-73.02999999999997, 26.03], [-72.5, 26.25], [-72.25, 26.15], [-72.0, 26.25], [-71.75, 26.15], [-71.5, 26.25], [-71.25, 26.15], [-71.0, 26.25], [-70.47000000000003, 26.03], [-70.25, 25.5], [-70.47000000000003, 24.97], [-71.0, 24.75], [-71.25, 24.85], [-71.32, 24.82], [-71.47000000000003, 24.47], [-71.82, 24.32], [-71.97000000000003, 23.97], [-72.5, 23.75], [-72.75, 23.85], [-72.82, 23.82], [-72.97000000000003, 23.47], [-73.32, 23.32], [-73.47000000000003, 22.97], [-74.0, 22.75], [-74.25, 22.85], [-74.5, 22.75], [-74.75, 22.85], [-75.0, 22.75], [-75.52999999999997, 22.97], [-75.75, 23.5], [-75.52999999999997, 24.03], [-75.18, 24.18], [-75.02999999999997, 24.53]]]]}, "2024-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.02999999999997, 24.53], [-74.68, 24.68], [-74.52999999999997, 25.03], [-74.18, 25.18], [-74.02999999999997, 25.53], [-73.5, 25.75], [-73.25, 25.65], [-73.18, 25.68], [-73.02999999999997, 26.03], [-72.5, 26.25], [-72.25, 26.15], [-72.0, 26.25], [-71.75, 26.15], [-71.5, 26.25], [-71.25, 26.15], [-71.0, 26.25], [-70.47000000000003, 26.03], [-70.25, 25.5], [-70.47000000000003, 24.97], [-71.0, 24.75], [-71.25, 24.85], [-71.32, 24.82], [-71.47000000000003, 24.47], [-71.82, 24.32], [-71.97000000000003, 23.97], [-72.5, 23.75], [-72.75, 23.85], [-72.82, 23.82], [-72.97000000000003, 23.47], [-73.32, 23.32], [-73.47000000000003, 22.97], [-74.0, 22.75], [-74.25, 22.85], [-74.5, 22.75], [-74.75, 22.85], [-75.0, 22.75], [-75.52999999999997, 22.97], [-75.75, 23.5], [-75.52999999999997, 24.03], [-75.18, 24.18], [-75.02999999999997, 24.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.193316639693478}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5999893988781209}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.80953609325269, 22.719740097611066, 22.989648437500023]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.077408091227255, 21.797869618733728, 22.48639322916671]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6172431463211139, -1.7199775788952663, -1.4627474714179824]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.930453939678955, -2.193316639693478, -1.6431182855753832]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.560455818318137, -1.7063974483263895, -1.474695209715121]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7734042367661882, -2.0568665774551893, -1.6457877914695287]}}