{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:07.460975", "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": "2015-Jun-01_to_2015-Jun-05_289.5_42.5"}, "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": 2015060000092}, "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": "June 01 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 05 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 300286.8268261465}, "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", "United States"]}, "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": ["Bay of Fundy", "North 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": 42.5}, "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": 289.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 298.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, 45.0], [-74.53, 45.53], [-74.18, 45.68], [-74.03, 46.03], [-73.5, 46.25], [-73.25, 46.15], [-73.0, 46.25], [-72.75, 46.15], [-72.5, 46.25], [-72.25, 46.15], [-72.0, 46.25], [-71.75, 46.15], [-71.5, 46.25], [-71.25, 46.15], [-71.0, 46.25], [-70.75, 46.15], [-70.5, 46.25], [-70.25, 46.15], [-70.0, 46.25], [-69.75, 46.15], [-69.5, 46.25], [-69.25, 46.15], [-69.0, 46.25], [-68.75, 46.15], [-68.5, 46.25], [-68.25, 46.15], [-68.0, 46.25], [-67.75, 46.15], [-67.5, 46.25], [-67.25, 46.15], [-67.0, 46.25], [-66.75, 46.15], [-66.5, 46.25], [-66.25, 46.15], [-66.0, 46.25], [-65.75, 46.15], [-65.5, 46.25], [-64.97, 46.03], [-64.82, 45.68], [-64.75, 45.65], [-64.68, 45.68], [-64.53, 46.03], [-64.0, 46.25], [-63.75, 46.15], [-63.5, 46.25], [-63.25, 46.15], [-63.0, 46.25], [-62.75, 46.15], [-62.5, 46.25], [-62.25, 46.15], [-62.0, 46.25], [-61.47, 46.03], [-61.25, 45.5], [-61.47, 44.97], [-61.82, 44.82], [-61.97, 44.47], [-62.5, 44.25], [-62.75, 44.35], [-63.0, 44.25], [-63.25, 44.35], [-63.5, 44.25], [-63.75, 44.35], [-63.82, 44.32], [-63.97, 43.97], [-64.32, 43.82], [-64.47, 43.47], [-65.0, 43.25], [-65.25, 43.35], [-65.5, 43.25], [-65.75, 43.35], [-66.0, 43.25], [-66.53, 43.47], [-66.75, 44.0], [-66.57, 44.43], [-67.0, 44.25], [-67.25, 44.35], [-67.32, 44.32], [-67.47, 43.97], [-68.0, 43.75], [-68.25, 43.85], [-68.5, 43.75], [-68.75, 43.85], [-68.82, 43.82], [-68.97, 43.47], [-69.32, 43.32], [-69.35, 43.25], [-69.25, 43.0], [-69.47, 42.47], [-69.82, 42.32], [-69.97, 41.97], [-70.32, 41.82], [-70.47, 41.47], [-70.82, 41.32], [-70.97, 40.97], [-71.5, 40.75], [-71.75, 40.85], [-72.0, 40.75], [-72.25, 40.85], [-72.5, 40.75], [-72.75, 40.85], [-73.0, 40.75], [-73.53, 40.97], [-73.75, 41.5], [-73.53, 42.03], [-73.18, 42.18], [-73.03, 42.53], [-72.68, 42.68], [-72.65, 42.75], [-72.75, 43.0], [-72.65, 43.25], [-72.68, 43.32], [-72.75, 43.35], [-72.82, 43.32], [-72.97, 42.97], [-73.5, 42.75], [-74.03, 42.97], [-74.25, 43.5], [-74.15, 43.75], [-74.25, 44.0], [-74.15, 44.25], [-74.18, 44.32], [-74.53, 44.47], [-74.75, 45.0]], [[-66.25, 44.85], [-66.32, 44.82], [-66.43, 44.57], [-66.18, 44.68], [-66.12, 44.8], [-66.25, 44.85]]]]}, "2015-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.25, 40.5], [-75.03, 41.03], [-74.68, 41.18], [-74.53, 41.53], [-74.0, 41.75], [-73.75, 41.65], [-73.68, 41.68], [-73.53, 42.03], [-73.18, 42.18], [-73.03, 42.53], [-72.68, 42.68], [-72.65, 42.75], [-72.75, 43.0], [-72.65, 43.25], [-72.68, 43.32], [-72.75, 43.35], [-72.82, 43.32], [-72.97, 42.97], [-73.5, 42.75], [-74.03, 42.97], [-74.25, 43.5], [-74.15, 43.75], [-74.25, 44.0], [-74.15, 44.25], [-74.18, 44.32], [-74.53, 44.47], [-74.75, 45.0], [-74.53, 45.53], [-74.18, 45.68], [-74.03, 46.03], [-73.5, 46.25], [-73.25, 46.15], [-73.0, 46.25], [-72.75, 46.15], [-72.5, 46.25], [-72.25, 46.15], [-72.0, 46.25], [-71.75, 46.15], [-71.5, 46.25], [-71.25, 46.15], [-71.0, 46.25], [-70.75, 46.15], [-70.5, 46.25], [-70.25, 46.15], [-70.0, 46.25], [-69.75, 46.15], [-69.5, 46.25], [-69.25, 46.15], [-69.0, 46.25], [-68.75, 46.15], [-68.5, 46.25], [-68.25, 46.15], [-68.0, 46.25], [-67.75, 46.15], [-67.5, 46.25], [-67.25, 46.15], [-67.0, 46.25], [-66.75, 46.15], [-66.5, 46.25], [-66.25, 46.15], [-66.0, 46.25], [-65.75, 46.15], [-65.5, 46.25], [-64.97, 46.03], [-64.82, 45.68], [-64.75, 45.65], [-64.68, 45.68], [-64.53, 46.03], [-64.0, 46.25], [-63.75, 46.15], [-63.5, 46.25], [-63.25, 46.15], [-63.0, 46.25], [-62.75, 46.15], [-62.5, 46.25], [-62.25, 46.15], [-62.0, 46.25], [-61.47, 46.03], [-61.25, 45.5], [-61.47, 44.97], [-61.82, 44.82], [-61.97, 44.47], [-62.5, 44.25], [-62.75, 44.35], [-63.0, 44.25], [-63.25, 44.35], [-63.5, 44.25], [-63.75, 44.35], [-63.82, 44.32], [-63.97, 43.97], [-64.32, 43.82], [-64.47, 43.47], [-65.0, 43.25], [-65.25, 43.35], [-65.5, 43.25], [-65.75, 43.35], [-66.0, 43.25], [-66.53, 43.47], [-66.75, 44.0], [-66.65, 44.25], [-66.7, 44.38], [-66.82, 44.32], [-66.97, 43.97], [-67.32, 43.82], [-67.35, 43.75], [-67.25, 43.5], [-67.47, 42.97], [-68.0, 42.75], [-68.53, 42.97], [-68.75, 43.5], [-68.65, 43.75], [-68.68, 43.82], [-68.75, 43.85], [-68.82, 43.82], [-68.97, 43.47], [-69.32, 43.32], [-69.35, 43.25], [-69.32, 43.18], [-68.97, 43.03], [-68.75, 42.5], [-68.97, 41.97], [-69.32, 41.82], [-69.47, 41.47], [-70.0, 41.25], [-70.25, 41.35], [-70.32, 41.32], [-70.47, 40.97], [-71.0, 40.75], [-71.25, 40.85], [-71.32, 40.82], [-71.47, 40.47], [-72.0, 40.25], [-72.25, 40.35], [-72.32, 40.32], [-72.47, 39.97], [-73.0, 39.75], [-73.25, 39.85], [-73.32, 39.82], [-73.47, 39.47], [-74.0, 39.25], [-74.25, 39.35], [-74.32, 39.32], [-74.47, 38.97], [-75.0, 38.75], [-75.53, 38.97], [-75.75, 39.5], [-75.53, 40.03], [-75.18, 40.18], [-75.15, 40.25], [-75.25, 40.5]]]]}, "2015-06-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.25, 40.5], [-75.03, 41.03], [-74.68, 41.18], [-74.53, 41.53], [-74.0, 41.75], [-73.75, 41.65], [-73.68, 41.68], [-73.53, 42.03], [-73.18, 42.18], [-73.03, 42.53], [-72.68, 42.68], [-72.65, 42.75], [-72.75, 43.0], [-72.65, 43.25], [-72.68, 43.32], [-72.75, 43.35], [-72.82, 43.32], [-72.97, 42.97], [-73.5, 42.75], [-74.03, 42.97], [-74.25, 43.5], [-74.15, 43.75], [-74.25, 44.0], [-74.15, 44.25], [-74.18, 44.32], [-74.53, 44.47], [-74.75, 45.0], [-74.53, 45.53], [-74.18, 45.68], [-74.03, 46.03], [-73.5, 46.25], [-73.25, 46.15], [-73.0, 46.25], [-72.75, 46.15], [-72.5, 46.25], [-72.25, 46.15], [-72.0, 46.25], [-71.75, 46.15], [-71.5, 46.25], [-71.25, 46.15], [-71.0, 46.25], [-70.75, 46.15], [-70.5, 46.25], [-70.25, 46.15], [-70.0, 46.25], [-69.75, 46.15], [-69.5, 46.25], [-69.25, 46.15], [-69.0, 46.25], [-68.75, 46.15], [-68.5, 46.25], [-68.25, 46.15], [-68.0, 46.25], [-67.75, 46.15], [-67.5, 46.25], [-67.25, 46.15], [-67.0, 46.25], [-66.75, 46.15], [-66.5, 46.25], [-66.25, 46.15], [-66.0, 46.25], [-65.75, 46.15], [-65.5, 46.25], [-64.97, 46.03], [-64.82, 45.68], [-64.75, 45.65], [-64.68, 45.68], [-64.53, 46.03], [-64.0, 46.25], [-63.75, 46.15], [-63.5, 46.25], [-63.25, 46.15], [-63.0, 46.25], [-62.75, 46.15], [-62.5, 46.25], [-62.25, 46.15], [-62.0, 46.25], [-61.47, 46.03], [-61.25, 45.5], [-61.47, 44.97], [-61.82, 44.82], [-61.97, 44.47], [-62.5, 44.25], [-62.75, 44.35], [-63.0, 44.25], [-63.25, 44.35], [-63.5, 44.25], [-63.75, 44.35], [-63.82, 44.32], [-63.97, 43.97], [-64.32, 43.82], [-64.47, 43.47], [-65.0, 43.25], [-65.25, 43.35], [-65.5, 43.25], [-65.75, 43.35], [-66.0, 43.25], [-66.43, 43.43], [-66.25, 43.0], [-66.47, 42.47], [-66.82, 42.32], [-66.97, 41.97], [-67.5, 41.75], [-67.75, 41.85], [-67.82, 41.82], [-67.97, 41.47], [-68.32, 41.32], [-68.47, 40.97], [-69.0, 40.75], [-69.25, 40.85], [-69.5, 40.75], [-69.75, 40.85], [-69.82, 40.82], [-69.97, 40.47], [-70.5, 40.25], [-70.75, 40.35], [-70.82, 40.32], [-70.97, 39.97], [-71.5, 39.75], [-71.75, 39.85], [-72.0, 39.75], [-72.25, 39.85], [-72.5, 39.75], [-72.75, 39.85], [-73.0, 39.75], [-73.25, 39.85], [-73.32, 39.82], [-73.47, 39.47], [-74.0, 39.25], [-74.25, 39.35], [-74.32, 39.32], [-74.47, 38.97], [-75.0, 38.75], [-75.53, 38.97], [-75.75, 39.5], [-75.53, 40.03], [-75.18, 40.18], [-75.15, 40.25], [-75.25, 40.5]], [[-68.75, 43.5], [-68.65, 43.75], [-68.68, 43.82], [-68.75, 43.85], [-68.82, 43.82], [-68.97, 43.47], [-69.32, 43.32], [-69.35, 43.25], [-69.32, 43.18], [-69.25, 43.15], [-69.0, 43.25], [-68.75, 43.15], [-68.68, 43.18], [-68.65, 43.25], [-68.75, 43.5]], [[-66.57, 43.57], [-66.75, 44.0], [-66.65, 44.25], [-66.7, 44.38], [-66.82, 44.32], [-66.96, 44.0], [-66.82, 43.68], [-66.57, 43.57]]]]}, "2015-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.03, 41.03], [-74.68, 41.18], [-74.53, 41.53], [-74.0, 41.75], [-73.75, 41.65], [-73.68, 41.68], [-73.53, 42.03], [-73.0, 42.25], [-72.75, 42.15], [-72.5, 42.25], [-72.25, 42.15], [-72.0, 42.25], [-71.75, 42.15], [-71.68, 42.18], [-71.65, 42.25], [-71.75, 42.5], [-71.65, 42.75], [-71.75, 43.0], [-71.53, 43.53], [-71.18, 43.68], [-71.03, 44.03], [-70.5, 44.25], [-69.97, 44.03], [-69.82, 43.68], [-69.47, 43.53], [-69.32, 43.18], [-69.25, 43.15], [-69.0, 43.25], [-68.75, 43.15], [-68.68, 43.18], [-68.65, 43.25], [-68.75, 43.5], [-68.65, 43.75], [-68.75, 44.0], [-68.53, 44.53], [-68.18, 44.68], [-68.03, 45.03], [-67.5, 45.25], [-66.97, 45.03], [-66.75, 44.5], [-66.96, 44.0], [-66.82, 43.68], [-66.47, 43.53], [-66.25, 43.0], [-66.47, 42.47], [-66.82, 42.32], [-66.97, 41.97], [-67.5, 41.75], [-67.75, 41.85], [-67.82, 41.82], [-67.97, 41.47], [-68.32, 41.32], [-68.47, 40.97], [-69.0, 40.75], [-69.25, 40.85], [-69.5, 40.75], [-69.75, 40.85], [-69.82, 40.82], [-69.97, 40.47], [-70.5, 40.25], [-70.75, 40.35], [-70.82, 40.32], [-70.97, 39.97], [-71.5, 39.75], [-71.75, 39.85], [-72.0, 39.75], [-72.25, 39.85], [-72.5, 39.75], [-72.75, 39.85], [-73.0, 39.75], [-73.25, 39.85], [-73.32, 39.82], [-73.47, 39.47], [-74.0, 39.25], [-74.25, 39.35], [-74.32, 39.32], [-74.47, 38.97], [-75.0, 38.75], [-75.53, 38.97], [-75.75, 39.5], [-75.53, 40.03], [-75.18, 40.18], [-75.15, 40.25], [-75.25, 40.5], [-75.03, 41.03]]], [[[-65.47, 45.03], [-65.25, 44.5], [-65.47, 43.97], [-66.0, 43.75], [-66.53, 43.97], [-66.75, 44.5], [-66.53, 45.03], [-66.0, 45.25], [-65.47, 45.03]]]]}, "2015-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.75, 41.15], [-73.68, 41.18], [-73.53, 41.53], [-73.0, 41.75], [-72.75, 41.65], [-72.5, 41.75], [-72.25, 41.65], [-72.0, 41.75], [-71.75, 41.65], [-71.68, 41.68], [-71.53, 42.03], [-71.18, 42.18], [-71.15, 42.25], [-71.25, 42.5], [-71.15, 42.75], [-71.25, 43.0], [-71.15, 43.25], [-71.25, 43.5], [-71.03, 44.03], [-70.5, 44.25], [-69.97, 44.03], [-69.82, 43.68], [-69.47, 43.53], [-69.32, 43.18], [-69.25, 43.15], [-69.0, 43.25], [-68.75, 43.15], [-68.68, 43.18], [-68.65, 43.25], [-68.75, 43.5], [-68.65, 43.75], [-68.75, 44.0], [-68.53, 44.53], [-68.18, 44.68], [-68.03, 45.03], [-67.5, 45.25], [-66.97, 45.03], [-66.75, 44.5], [-66.96, 44.0], [-66.82, 43.68], [-66.47, 43.53], [-66.25, 43.0], [-66.47, 42.47], [-66.82, 42.32], [-66.97, 41.97], [-67.5, 41.75], [-67.75, 41.85], [-67.82, 41.82], [-67.97, 41.47], [-68.32, 41.32], [-68.47, 40.97], [-69.0, 40.75], [-69.25, 40.85], [-69.5, 40.75], [-69.75, 40.85], [-69.82, 40.82], [-69.97, 40.47], [-70.5, 40.25], [-70.75, 40.35], [-70.82, 40.32], [-70.97, 39.97], [-71.5, 39.75], [-71.75, 39.85], [-72.0, 39.75], [-72.25, 39.85], [-72.5, 39.75], [-72.75, 39.85], [-73.0, 39.75], [-73.25, 39.85], [-73.5, 39.75], [-73.75, 39.85], [-73.82, 39.82], [-73.97, 39.47], [-74.5, 39.25], [-75.03, 39.47], [-75.25, 40.0], [-75.03, 40.53], [-74.68, 40.68], [-74.53, 41.03], [-74.0, 41.25], [-73.75, 41.15]]], [[[-65.47, 45.03], [-65.25, 44.5], [-65.47, 43.97], [-66.0, 43.75], [-66.53, 43.97], [-66.75, 44.5], [-66.53, 45.03], [-66.0, 45.25], [-65.47, 45.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.11822381281064}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.996036013258869}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.537269625960107, 8.184479292597018, 9.69831319176484, 11.438037960893666, 11.02308143797768]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.889035943867498, 4.69943522274508, 6.198215730511208, 8.305948071796081, 8.064456175523787]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.949551330374249, -6.444610089965892, -4.592736090311065, -3.1185536065874757, -2.6091208275535207]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.067134992829779, -9.11822381281064, -6.847005774192382, -5.175484050564933, -4.637640406152855]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.761024305952607, -2.1022386790584706, -1.705248248641498, -1.5320713778187613, -1.4909876177829653]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4185736669794657, -2.6227149566102614, -2.250257853195463, -1.900911441218489, -1.787299504054047]}}