{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:28.047612", "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": "2019-Sep-06_to_2019-Sep-14_298.5_50.0"}, "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": 2019090000223}, "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 06 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 14 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 93030.87536873436}, "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": ["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": ["Gulf of St. Lawrence"]}, "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": 50.0}, "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": 298.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "298.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 290.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 300.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.5, 48.75], [-69.25, 48.65], [-69.18, 48.68], [-69.03, 49.03], [-68.62, 49.2], [-68.75, 49.5], [-68.53, 50.03], [-68.0, 50.25], [-67.47, 50.03], [-67.25, 49.5], [-67.37, 49.2], [-66.97, 49.03], [-66.75, 48.5], [-66.85, 48.25], [-66.75, 48.0], [-66.97, 47.47], [-67.32, 47.32], [-67.47, 46.97], [-68.0, 46.75], [-68.25, 46.85], [-68.5, 46.75], [-68.75, 46.85], [-69.0, 46.75], [-69.25, 46.85], [-69.5, 46.75], [-70.03, 46.97], [-70.25, 47.5], [-70.15, 47.75], [-70.25, 48.0], [-70.03, 48.53], [-69.5, 48.75]]], [[[-64.75, 49.5], [-64.53, 50.03], [-64.0, 50.25], [-63.47, 50.03], [-63.25, 49.5], [-63.47, 48.97], [-64.0, 48.75], [-64.53, 48.97], [-64.75, 49.5]]], [[[-66.25, 50.0], [-66.03, 50.53], [-65.5, 50.75], [-64.97, 50.53], [-64.75, 50.0], [-64.97, 49.47], [-65.5, 49.25], [-66.03, 49.47], [-66.25, 50.0]]]]}, "2019-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.5, 48.75], [-69.25, 48.65], [-69.18, 48.68], [-69.03, 49.03], [-68.62, 49.2], [-68.75, 49.5], [-68.53, 50.03], [-68.0, 50.25], [-67.47, 50.03], [-67.25, 49.5], [-67.37, 49.2], [-66.97, 49.03], [-66.75, 48.5], [-66.85, 48.25], [-66.75, 48.0], [-66.97, 47.47], [-67.32, 47.32], [-67.47, 46.97], [-68.0, 46.75], [-68.25, 46.85], [-68.5, 46.75], [-68.75, 46.85], [-69.0, 46.75], [-69.25, 46.85], [-69.5, 46.75], [-70.03, 46.97], [-70.25, 47.5], [-70.15, 47.75], [-70.25, 48.0], [-70.03, 48.53], [-69.5, 48.75]]], [[[-66.25, 50.0], [-66.03, 50.53], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.5, 50.54], [-64.0, 50.75], [-63.75, 50.65], [-63.5, 50.75], [-63.0, 50.54], [-62.5, 50.75], [-62.25, 50.65], [-62.0, 50.75], [-61.75, 50.65], [-61.5, 50.75], [-60.97, 50.53], [-60.75, 50.0], [-60.97, 49.47], [-61.32, 49.32], [-61.47, 48.97], [-62.0, 48.75], [-62.25, 48.85], [-62.5, 48.75], [-63.0, 48.96], [-63.5, 48.75], [-63.75, 48.85], [-64.0, 48.75], [-64.53, 48.97], [-64.7, 49.38], [-65.0, 49.25], [-65.25, 49.35], [-65.5, 49.25], [-66.03, 49.47], [-66.25, 50.0]]]]}, "2019-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.5, 48.75], [-69.25, 48.65], [-69.18, 48.68], [-69.03, 49.03], [-68.62, 49.2], [-68.75, 49.5], [-68.53, 50.03], [-68.0, 50.25], [-67.47, 50.03], [-67.25, 49.5], [-67.37, 49.2], [-66.97, 49.03], [-66.75, 48.5], [-66.85, 48.25], [-66.75, 48.0], [-66.97, 47.47], [-67.32, 47.32], [-67.47, 46.97], [-68.0, 46.75], [-68.25, 46.85], [-68.5, 46.75], [-68.75, 46.85], [-69.0, 46.75], [-69.25, 46.85], [-69.5, 46.75], [-70.03, 46.97], [-70.25, 47.5], [-70.15, 47.75], [-70.25, 48.0], [-70.03, 48.53], [-69.5, 48.75]]], [[[-66.25, 50.0], [-66.03, 50.53], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.75, 50.65], [-63.5, 50.75], [-63.25, 50.65], [-63.0, 50.75], [-62.75, 50.65], [-62.5, 50.75], [-62.25, 50.65], [-62.0, 50.75], [-61.75, 50.65], [-61.5, 50.75], [-60.97, 50.53], [-60.75, 50.0], [-60.97, 49.47], [-61.32, 49.32], [-61.47, 48.97], [-62.0, 48.75], [-62.25, 48.85], [-62.32, 48.82], [-62.47, 48.47], [-63.0, 48.25], [-63.25, 48.35], [-63.5, 48.25], [-63.75, 48.35], [-64.0, 48.25], [-64.53, 48.47], [-64.68, 48.82], [-65.03, 48.97], [-65.18, 49.32], [-65.25, 49.35], [-65.5, 49.25], [-66.03, 49.47], [-66.25, 50.0]]]]}, "2019-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.53, 48.47], [-68.75, 49.0], [-68.53, 49.53], [-68.0, 49.75], [-67.47, 49.53], [-67.25, 49.0], [-67.47, 48.47], [-68.0, 48.25], [-68.53, 48.47]]], [[[-66.25, 50.0], [-66.03, 50.53], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.75, 50.65], [-63.5, 50.75], [-63.25, 50.65], [-63.0, 50.75], [-62.75, 50.65], [-62.5, 50.75], [-62.25, 50.65], [-62.0, 50.75], [-61.75, 50.65], [-61.5, 50.75], [-60.97, 50.53], [-60.75, 50.0], [-60.97, 49.47], [-61.32, 49.32], [-61.47, 48.97], [-62.0, 48.75], [-62.25, 48.85], [-62.32, 48.82], [-62.47, 48.47], [-63.0, 48.25], [-63.25, 48.35], [-63.5, 48.25], [-63.75, 48.35], [-64.0, 48.25], [-64.53, 48.47], [-64.68, 48.82], [-65.03, 48.97], [-65.18, 49.32], [-65.25, 49.35], [-65.5, 49.25], [-66.03, 49.47], [-66.25, 50.0]]]]}, "2019-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.53, 48.47], [-68.75, 49.0], [-68.53, 49.53], [-68.0, 49.75], [-67.75, 49.65], [-67.68, 49.68], [-67.53, 50.03], [-67.0, 50.25], [-66.75, 50.15], [-66.68, 50.18], [-66.53, 50.53], [-66.0, 50.75], [-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.75, 50.65], [-63.5, 50.75], [-63.25, 50.65], [-63.0, 50.75], [-62.75, 50.65], [-62.5, 50.75], [-62.25, 50.65], [-62.0, 50.75], [-61.75, 50.65], [-61.5, 50.75], [-60.97, 50.53], [-60.75, 50.0], [-60.97, 49.47], [-61.5, 49.25], [-61.75, 49.35], [-62.0, 49.25], [-62.25, 49.35], [-62.37, 49.3], [-62.25, 49.0], [-62.47, 48.47], [-63.0, 48.25], [-63.25, 48.35], [-63.5, 48.25], [-63.75, 48.35], [-64.0, 48.25], [-64.53, 48.47], [-64.68, 48.82], [-65.03, 48.97], [-65.18, 49.32], [-65.25, 49.35], [-65.5, 49.25], [-65.75, 49.35], [-65.82, 49.32], [-65.97, 48.97], [-66.32, 48.82], [-66.47, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.75, 48.35], [-68.0, 48.25], [-68.53, 48.47]]]]}, "2019-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.53, 48.47], [-68.75, 49.0], [-68.53, 49.53], [-68.0, 49.75], [-67.75, 49.65], [-67.68, 49.68], [-67.53, 50.03], [-67.0, 50.25], [-66.75, 50.15], [-66.68, 50.18], [-66.53, 50.53], [-66.0, 50.75], [-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.75, 50.65], [-63.5, 50.75], [-63.25, 50.65], [-63.0, 50.75], [-62.75, 50.65], [-62.5, 50.75], [-62.25, 50.65], [-62.0, 50.75], [-61.75, 50.65], [-61.5, 50.75], [-61.25, 50.65], [-61.0, 50.75], [-60.47, 50.53], [-60.25, 50.0], [-60.47, 49.47], [-61.0, 49.25], [-61.25, 49.35], [-61.32, 49.32], [-61.47, 48.97], [-62.0, 48.75], [-62.53, 48.97], [-62.68, 49.32], [-62.75, 49.35], [-63.0, 49.25], [-63.25, 49.35], [-63.37, 49.3], [-63.25, 49.0], [-63.47, 48.47], [-64.0, 48.25], [-64.53, 48.47], [-64.75, 49.0], [-64.62, 49.3], [-64.75, 49.35], [-65.0, 49.25], [-65.25, 49.35], [-65.32, 49.32], [-65.47, 48.97], [-66.0, 48.75], [-66.25, 48.85], [-66.32, 48.82], [-66.47, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.75, 48.35], [-68.0, 48.25], [-68.53, 48.47]]]]}, "2019-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.53, 48.47], [-68.75, 49.0], [-68.53, 49.53], [-68.0, 49.75], [-67.75, 49.65], [-67.68, 49.68], [-67.53, 50.03], [-67.0, 50.25], [-66.75, 50.15], [-66.68, 50.18], [-66.53, 50.53], [-66.0, 50.75], [-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.75, 50.65], [-63.5, 50.75], [-63.25, 50.65], [-63.0, 50.75], [-62.75, 50.65], [-62.5, 50.75], [-62.25, 50.65], [-62.0, 50.75], [-61.75, 50.65], [-61.5, 50.75], [-61.25, 50.65], [-61.0, 50.75], [-60.75, 50.65], [-60.5, 50.75], [-60.25, 50.65], [-60.0, 50.75], [-59.47, 50.53], [-59.25, 50.0], [-59.35, 49.75], [-59.25, 49.5], [-59.47, 48.97], [-60.0, 48.75], [-60.25, 48.85], [-60.5, 48.75], [-60.75, 48.85], [-60.82, 48.82], [-60.97, 48.47], [-61.32, 48.32], [-61.47, 47.97], [-62.0, 47.75], [-62.53, 47.97], [-62.75, 48.5], [-62.54, 49.0], [-62.68, 49.32], [-62.75, 49.35], [-63.0, 49.25], [-63.25, 49.35], [-63.37, 49.3], [-63.25, 49.0], [-63.47, 48.47], [-64.0, 48.25], [-64.25, 48.35], [-64.5, 48.25], [-65.03, 48.47], [-65.25, 49.0], [-65.12, 49.3], [-65.25, 49.35], [-65.32, 49.32], [-65.47, 48.97], [-66.0, 48.75], [-66.25, 48.85], [-66.32, 48.82], [-66.47, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.75, 48.35], [-68.0, 48.25], [-68.53, 48.47]]]]}, "2019-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-68.53, 48.47], [-68.75, 49.0], [-68.53, 49.53], [-68.0, 49.75], [-67.75, 49.65], [-67.68, 49.68], [-67.53, 50.03], [-67.0, 50.25], [-66.75, 50.15], [-66.68, 50.18], [-66.53, 50.53], [-66.0, 50.75], [-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.75, 50.65], [-63.5, 50.75], [-63.25, 50.65], [-63.0, 50.75], [-62.75, 50.65], [-62.5, 50.75], [-62.25, 50.65], [-62.0, 50.75], [-61.75, 50.65], [-61.5, 50.75], [-61.25, 50.65], [-61.0, 50.75], [-60.75, 50.65], [-60.5, 50.75], [-60.25, 50.65], [-60.0, 50.75], [-59.47, 50.53], [-59.25, 50.0], [-59.35, 49.75], [-59.25, 49.5], [-59.47, 48.97], [-60.0, 48.75], [-60.25, 48.85], [-60.5, 48.75], [-60.75, 48.85], [-60.82, 48.82], [-60.97, 48.47], [-61.32, 48.32], [-61.47, 47.97], [-62.0, 47.75], [-62.53, 47.97], [-62.75, 48.5], [-62.54, 49.0], [-62.68, 49.32], [-62.75, 49.35], [-63.0, 49.25], [-63.25, 49.35], [-63.37, 49.3], [-63.25, 49.0], [-63.47, 48.47], [-64.0, 48.25], [-64.25, 48.35], [-64.5, 48.25], [-65.03, 48.47], [-65.25, 49.0], [-65.12, 49.3], [-65.25, 49.35], [-65.32, 49.32], [-65.47, 48.97], [-66.0, 48.75], [-66.25, 48.85], [-66.32, 48.82], [-66.47, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.75, 48.35], [-68.0, 48.25], [-68.53, 48.47]]]]}, "2019-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-65.03, 48.47], [-65.25, 49.0], [-65.03, 49.53], [-64.5, 49.75], [-63.97, 49.53], [-63.75, 49.0], [-63.97, 48.47], [-64.5, 48.25], [-65.03, 48.47]]], [[[-62.03, 50.53], [-61.5, 50.75], [-61.25, 50.65], [-61.0, 50.75], [-60.75, 50.65], [-60.5, 50.75], [-60.25, 50.65], [-60.0, 50.75], [-59.47, 50.53], [-59.25, 50.0], [-59.35, 49.75], [-59.25, 49.5], [-59.47, 48.97], [-60.0, 48.75], [-60.25, 48.85], [-60.5, 48.75], [-60.75, 48.85], [-60.82, 48.82], [-60.97, 48.47], [-61.32, 48.32], [-61.47, 47.97], [-62.0, 47.75], [-62.53, 47.97], [-62.75, 48.5], [-62.53, 49.03], [-62.18, 49.18], [-62.04, 49.5], [-62.25, 50.0], [-62.03, 50.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.362479807290526}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0959871409706357}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.61415206343014, 9.171750299082362, 9.443507074636557, 10.246237557813572, 10.1766931862187, 9.954237703606793, 9.873142923570924, 9.676987549509022, 10.018215871115899]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.413522477039123, 6.588291002577364, 7.67164019153023, 9.29517618934625, 9.10956488149219, 9.250783883481688, 8.749279500562182, 8.799944632255404, 9.368680840723528]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.108180779167894, -4.200262979687788, -3.68612484218858, -2.615873870631207, -2.4349737569814662, -2.474776131043098, -2.6497580628154775, -2.7411829280597937, -2.6863430264295913]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.124962326471348, -6.362479807290526, -5.178305275598348, -3.1425729634091795, -3.0073002206694355, -2.9529572300365317, -3.2147263157074235, -3.4319651923646006, -3.338861102254498]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4228042438722162, -1.6262003570473909, -1.7085062933986674, -1.61007564450995, -1.577144488347694, -1.5259067741832064, -1.5863225580951175, -1.590270597667771, -1.476096851589665]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6697671339920677, -1.9271833464626142, -2.4214144889004117, -2.005548768518541, -2.140319867734317, -1.8761565524710724, -1.9717633579512024, -1.995304252640265, -1.629499169390811]}}