{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:32.602785", "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": "2021-Nov-21_to_2021-Nov-25_232.5_66.0"}, "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": 2021110000741}, "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": "November 21 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 25 2021"}, "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": 115761.94844105447}, "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": 66.0}, "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": 232.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "232.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 227.5}, "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": 68.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-127.0, 64.75], [-127.25, 64.85], [-127.5, 64.75], [-127.75, 64.85], [-128.0, 64.75], [-128.25, 64.85], [-128.5, 64.75], 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69.25], [-122.47, 69.03], [-122.25, 68.5], [-122.35, 68.25], [-122.3, 68.13], [-122.0, 68.25], [-121.75, 68.15], [-121.5, 68.25], [-120.97, 68.03], [-120.75, 67.5], [-120.97, 66.97], [-121.32, 66.82], [-121.47, 66.47], [-122.0, 66.25], [-122.25, 66.35], [-122.5, 66.25], [-122.75, 66.35], [-122.82, 66.32], [-122.97, 65.97], [-123.5, 65.75], [-123.75, 65.85], [-124.0, 65.75], [-124.25, 65.85], [-124.32, 65.82], [-124.47, 65.47], [-125.0, 65.25], [-125.25, 65.35], [-125.5, 65.25], [-125.75, 65.35], [-125.82, 65.32], [-125.97, 64.97], [-126.5, 64.75], [-126.75, 64.85], [-127.0, 64.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-128.25, 66.0], [-128.03, 66.53], [-127.5, 66.75], [-126.97, 66.53], 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