{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:17:20.221990", "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": "2022-Feb-01_to_2022-Feb-05_237.5_67.5"}, "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": 2022020000186}, "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": "February 01 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 05 2022"}, "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": 79345.68535949301}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": []}, "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": 67.5}, "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": 237.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 226.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 238.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 65.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-133.0, 67.75], [-132.75, 67.65], [-132.5, 67.75], [-132.25, 67.65], [-132.0, 67.75], [-131.75, 67.65], [-131.5, 67.75], 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"polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.03, 68.03], [-122.5, 68.25], [-122.25, 68.15], [-122.0, 68.25], [-121.75, 68.15], [-121.5, 68.25], [-120.97, 68.03], [-120.75, 67.5], [-120.97, 66.97], [-121.5, 66.75], [-121.75, 66.85], [-121.82, 66.82], [-121.97, 66.47], [-122.5, 66.25], [-122.75, 66.35], [-123.0, 66.25], [-123.53, 66.47], [-123.75, 67.0], [-123.53, 67.53], [-123.18, 67.68], [-123.03, 68.03]]]]}, "2022-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.53, 66.97], [-129.75, 67.5], [-129.53, 68.03], [-129.0, 68.25], [-128.75, 68.15], [-128.5, 68.25], [-128.25, 68.15], [-128.0, 68.25], [-127.75, 68.15], [-127.5, 68.25], [-127.25, 68.15], [-127.0, 68.25], [-126.75, 68.15], [-126.5, 68.25], [-126.25, 68.15], [-126.0, 68.25], [-125.75, 68.15], [-125.5, 68.25], [-125.25, 68.15], [-125.0, 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"anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.118256212506168, -13.104179763738074, -15.68721767603489, -14.800094449081087, -15.909259646016295]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4735629481591679, -1.5316965334307764, -1.575601712929235, -1.615629535334602, -1.6423354410017732]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6148142730405683, -2.0230695892079447, -2.1228052625868497, -1.8476414352811872, -1.9248610428612294]}}