{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:13.526278", "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": "2016-Sep-16_to_2016-Sep-18_290.0_59.0"}, "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": 2016090000444}, "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": "September 16 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 18 2016"}, "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": 59612.47870419279}, "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": ["N.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": ["Hudson Strait"]}, "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": 59.0}, "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": 290.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "290.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 285.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 292.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.03, 58.97], [-75.25, 59.5], [-75.03, 60.03], [-74.5, 60.25], [-74.25, 60.15], [-74.18, 60.18], [-74.03, 60.53], [-73.5, 60.75], [-73.25, 60.65], [-73.0, 60.75], [-72.75, 60.65], [-72.68, 60.68], [-72.53, 61.03], [-72.0, 61.25], [-71.75, 61.15], [-71.5, 61.25], [-71.25, 61.15], [-71.0, 61.25], [-70.75, 61.15], [-70.5, 61.25], [-70.25, 61.15], [-70.0, 61.25], [-69.47, 61.03], [-69.32, 60.68], [-68.97, 60.53], [-68.75, 60.0], [-68.85, 59.75], [-68.82, 59.68], [-68.75, 59.65], [-68.5, 59.75], [-68.25, 59.65], [-68.0, 59.75], [-67.75, 59.65], [-67.5, 59.75], [-66.97, 59.53], [-66.75, 59.0], [-66.97, 58.47], [-67.5, 58.25], [-67.75, 58.35], [-68.0, 58.25], [-68.25, 58.35], [-68.32, 58.32], [-68.47, 57.97], [-69.0, 57.75], [-69.25, 57.85], [-69.5, 57.75], [-69.75, 57.85], [-70.0, 57.75], [-70.25, 57.85], [-70.5, 57.75], [-70.75, 57.85], [-71.0, 57.75], [-71.53, 57.97], [-71.68, 58.32], [-72.03, 58.47], [-72.18, 58.82], [-72.25, 58.85], [-72.5, 58.75], [-73.0, 58.96], [-73.5, 58.75], [-73.75, 58.85], [-74.0, 58.75], [-74.25, 58.85], [-74.5, 58.75], [-75.03, 58.97]]]]}, "2016-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.03, 58.97], [-75.25, 59.5], [-75.03, 60.03], [-74.5, 60.25], [-74.25, 60.15], [-74.18, 60.18], [-74.03, 60.53], [-73.5, 60.75], [-73.25, 60.65], [-73.0, 60.75], [-72.75, 60.65], [-72.68, 60.68], [-72.53, 61.03], [-72.0, 61.25], [-71.75, 61.15], [-71.5, 61.25], [-71.25, 61.15], [-71.0, 61.25], [-70.75, 61.15], [-70.5, 61.25], [-70.25, 61.15], [-70.0, 61.25], [-69.47, 61.03], [-69.32, 60.68], [-68.97, 60.53], [-68.75, 60.0], [-68.85, 59.75], [-68.82, 59.68], [-68.75, 59.65], [-68.5, 59.75], [-68.25, 59.65], [-68.0, 59.75], [-67.75, 59.65], [-67.5, 59.75], [-66.97, 59.53], [-66.75, 59.0], [-66.97, 58.47], [-67.5, 58.25], [-67.75, 58.35], [-68.0, 58.25], [-68.25, 58.35], [-68.32, 58.32], [-68.47, 57.97], [-69.0, 57.75], [-69.25, 57.85], [-69.5, 57.75], [-69.75, 57.85], [-70.0, 57.75], [-70.25, 57.85], [-70.5, 57.75], [-70.75, 57.85], [-71.0, 57.75], [-71.53, 57.97], [-71.68, 58.32], [-72.03, 58.47], [-72.18, 58.82], [-72.25, 58.85], [-72.5, 58.75], [-73.0, 58.96], [-73.5, 58.75], [-73.75, 58.85], [-74.0, 58.75], [-74.25, 58.85], [-74.5, 58.75], [-75.03, 58.97]]]]}, "2016-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.03, 58.97], [-75.25, 59.5], [-75.03, 60.03], [-74.5, 60.25], [-74.25, 60.15], [-74.18, 60.18], [-74.03, 60.53], [-73.5, 60.75], [-73.25, 60.65], [-73.0, 60.75], [-72.75, 60.65], [-72.68, 60.68], [-72.53, 61.03], [-72.0, 61.25], [-71.75, 61.15], [-71.5, 61.25], [-71.25, 61.15], [-71.0, 61.25], [-70.75, 61.15], [-70.5, 61.25], [-70.25, 61.15], [-70.0, 61.25], [-69.47, 61.03], [-69.32, 60.68], [-68.97, 60.53], [-68.75, 60.0], [-68.85, 59.75], [-68.82, 59.68], [-68.75, 59.65], [-68.5, 59.75], [-68.25, 59.65], [-68.0, 59.75], [-67.75, 59.65], [-67.5, 59.75], [-66.97, 59.53], [-66.75, 59.0], [-66.97, 58.47], [-67.5, 58.25], [-67.75, 58.35], [-68.0, 58.25], [-68.25, 58.35], [-68.32, 58.32], [-68.47, 57.97], [-69.0, 57.75], [-69.25, 57.85], [-69.5, 57.75], [-69.75, 57.85], [-70.0, 57.75], [-70.25, 57.85], [-70.5, 57.75], [-70.75, 57.85], [-71.0, 57.75], [-71.53, 57.97], [-71.68, 58.32], [-72.03, 58.47], [-72.18, 58.82], [-72.25, 58.85], [-72.5, 58.75], [-73.0, 58.96], [-73.5, 58.75], [-73.75, 58.85], [-74.0, 58.75], [-74.25, 58.85], [-74.5, 58.75], [-75.03, 58.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.306504570853974}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.177991935566638}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.282755811139225, -0.657489008188918, 0.20496331708829985]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.2906552712320263, -2.2311129912530987, -1.1916248680923331]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.423299904939069, -4.52794584324655, -3.582730058514295]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.436842822815265, -6.306504570853974, -4.654301850217564]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.793872868359992, -1.8178202864554431, -1.4035726626484926]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0983525614363487, -2.320616437299461, -1.7240734682055414]}}