{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:19:47.178452", "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": "2020-May-05_to_2020-May-08_304.5_47.5"}, "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": 2020050000162}, "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 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 08 2020"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 65963.14495612393}, "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", "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": 47.5}, "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": 304.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "304.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 305.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 49.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.03, 49.03], [-57.5, 49.25], [-57.25, 49.15], [-57.0, 49.25], [-56.75, 49.15], [-56.5, 49.25], [-55.97, 49.03], [-55.82, 48.68], [-55.75, 48.65], [-55.5, 48.75], [-55.25, 48.65], [-55.0, 48.75], [-54.47, 48.53], [-54.25, 48.0], [-54.47, 47.47], [-54.82, 47.32], [-54.97, 46.97], [-55.5, 46.75], [-56.03, 46.97], [-56.18, 47.32], [-56.25, 47.35], [-56.5, 47.25], [-56.75, 47.35], [-57.0, 47.25], [-57.25, 47.35], [-57.5, 47.25], [-58.03, 47.47], [-58.25, 48.0], [-58.15, 48.25], [-58.25, 48.5], [-58.03, 49.03]]]]}, "2020-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, 48.5], [-62.03, 49.03], [-61.68, 49.18], [-61.65, 49.25], [-61.75, 49.5], [-61.53, 50.03], [-61.0, 50.25], [-60.47, 50.03], [-60.32, 49.68], [-59.97, 49.53], [-59.82, 49.18], [-59.47, 49.03], [-59.32, 48.68], [-59.25, 48.65], [-59.18, 48.68], [-59.15, 48.75], [-59.25, 49.0], [-59.03, 49.53], [-58.5, 49.75], [-57.97, 49.53], [-57.82, 49.18], [-57.75, 49.15], [-57.5, 49.25], [-57.25, 49.15], [-57.0, 49.25], [-56.75, 49.15], [-56.5, 49.25], [-55.97, 49.03], [-55.82, 48.68], [-55.75, 48.65], [-55.5, 48.75], [-55.25, 48.65], [-55.0, 48.75], [-54.47, 48.53], [-54.32, 48.18], [-53.97, 48.03], [-53.75, 47.5], [-53.97, 46.97], [-54.5, 46.75], [-54.75, 46.85], [-54.82, 46.82], [-54.97, 46.47], [-55.5, 46.25], [-56.03, 46.47], [-56.18, 46.82], [-56.5, 46.96], [-57.0, 46.75], [-57.53, 46.97], [-57.68, 47.32], [-57.75, 47.35], [-58.0, 47.25], [-58.25, 47.35], [-58.5, 47.25], [-58.75, 47.35], [-59.0, 47.25], [-59.25, 47.35], [-59.5, 47.25], [-59.75, 47.35], [-60.0, 47.25], [-60.25, 47.35], [-60.5, 47.25], [-60.75, 47.35], [-61.0, 47.25], [-61.53, 47.47], [-61.68, 47.82], [-62.03, 47.97], [-62.25, 48.5]]]]}, "2020-05-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-62.25, 48.5], [-62.03, 49.03], [-61.68, 49.18], [-61.65, 49.25], [-61.75, 49.5], [-61.53, 50.03], [-61.0, 50.25], [-60.47, 50.03], [-60.32, 49.68], [-59.97, 49.53], [-59.82, 49.18], [-59.47, 49.03], [-59.32, 48.68], [-59.25, 48.65], [-59.18, 48.68], [-59.15, 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47.25], [-61.53, 47.47], [-61.68, 47.82], [-62.03, 47.97], [-62.25, 48.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.261838771315581}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.200516085668155}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.6437132307512456, 1.0352893552076807, 1.178115770968759, 1.3044598905239013]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.18254256227777432, -0.11240745133738983, -0.5176412340815091, 0.4912554678285801]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.319695451753608, -3.0756039576896423, -3.145048026107192, -3.0069579549684664]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.261838771315581, -4.755256508549564, -5.004593781133394, -4.8681050071101595]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4710661327902632, -1.3868730668224052, -1.4179674677400962, -1.3958275051360192]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6390060469706447, -1.8179834290389403, -2.0325143421783025, -1.6710895960197767]}}