{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:04.237164", "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": "2025-Apr-03_to_2025-Apr-06_306.0_53.0"}, "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": 2025040000157}, "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": "April 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2025"}, "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": 75327.86720649253}, "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": ["Labrador Sea"]}, "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": 53.0}, "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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 301.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 306.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.65, 55.25], [-58.75, 55.5], [-58.53, 56.03], [-58.0, 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55.65], [-56.5, 55.75], [-55.97, 55.53], [-55.82, 55.18], [-55.75, 55.15], [-55.5, 55.25], [-54.97, 55.03], [-54.82, 54.68], [-54.47, 54.53], [-54.32, 54.18], [-53.97, 54.03], [-53.82, 53.68], [-53.47, 53.53], [-53.25, 53.0], [-53.35, 52.75], [-53.25, 52.5], [-53.35, 52.25], [-53.25, 52.0], [-53.47, 51.47], [-53.82, 51.32], [-53.97, 50.97], [-54.5, 50.75], [-55.03, 50.97], [-55.18, 51.32], [-55.5, 51.46], [-56.0, 51.25], [-56.25, 51.35], [-56.5, 51.25], [-57.03, 51.47], [-57.25, 52.0], [-57.15, 52.25], [-57.25, 52.5], [-57.12, 52.8], [-57.53, 52.97], [-57.68, 53.32], [-58.03, 53.47], [-58.18, 53.82], [-58.53, 53.97], [-58.75, 54.5], [-58.65, 54.75], [-58.75, 55.0], [-58.65, 55.25]]]]}, "2025-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.65, 55.25], [-58.75, 55.5], [-58.53, 56.03], [-58.0, 56.25], [-57.75, 56.15], [-57.5, 56.25], [-56.97, 56.03], [-56.82, 55.68], [-56.75, 55.65], [-56.5, 55.75], [-55.97, 55.53], [-55.82, 55.18], [-55.75, 55.15], [-55.5, 55.25], [-54.97, 55.03], [-54.82, 54.68], [-54.47, 54.53], [-54.32, 54.18], [-53.97, 54.03], [-53.82, 53.68], [-53.47, 53.53], [-53.25, 53.0], [-53.35, 52.75], [-53.25, 52.5], [-53.35, 52.25], [-53.25, 52.0], [-53.47, 51.47], [-53.82, 51.32], [-53.97, 50.97], [-54.5, 50.75], [-55.03, 50.97], [-55.18, 51.32], [-55.5, 51.46], [-56.0, 51.25], [-56.25, 51.35], [-56.5, 51.25], [-57.03, 51.47], [-57.25, 52.0], [-57.15, 52.25], [-57.25, 52.5], [-57.12, 52.8], [-57.53, 52.97], [-57.68, 53.32], [-58.03, 53.47], [-58.18, 53.82], [-58.53, 53.97], [-58.75, 54.5], [-58.65, 54.75], [-58.75, 55.0], [-58.65, 55.25]]]]}, "2025-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.65, 52.75], [-54.75, 53.0], [-54.53, 53.53], [-54.0, 53.75], [-53.47, 53.53], [-53.25, 53.0], [-53.35, 52.75], [-53.25, 52.5], [-53.35, 52.25], [-53.25, 52.0], [-53.47, 51.47], [-54.0, 51.25], [-54.53, 51.47], [-54.75, 52.0], [-54.65, 52.25], [-54.75, 52.5], [-54.65, 52.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.808074796685105}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.752752478919993}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-11.355684134630621, -10.63419052992407, -9.635293969875363, -6.540203264024456]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-14.1840830485026, -13.37766621907548, -11.93471755981443, -6.70155309041337]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.442546747485595, -6.910727346812733, -6.06965213386068, -4.5022789964666]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.808074796685105, -8.78185607228852, -7.171379500738567, -4.63494095474033]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0408624224563496, -1.9260823921343992, -1.7315830819415357, -1.622854130508511]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.627639864003507, -2.5854148497632035, -2.0807317231485967, -1.6669226503775667]}}