{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:44.435860", "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-Jan-13_to_2022-Jan-17_212.5_71.5"}, "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": 2022010000588}, "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": "January 13 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 17 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": 59392.78174912815}, "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": ["Beaufort 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": 71.5}, "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": 212.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "212.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 209.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 220.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 71.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 72.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-150.25, 72.15], [-150.18, 72.18], [-150.03, 72.53], [-149.5, 72.75], [-149.25, 72.65], [-149.0, 72.75], [-148.75, 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[-143.5, 70.75], [-143.75, 70.85], [-143.82, 70.82], [-143.97, 70.47], [-144.5, 70.25], [-144.75, 70.35], [-145.0, 70.25], [-145.25, 70.35], [-145.5, 70.25], [-145.75, 70.35], [-146.0, 70.25], [-146.25, 70.35], [-146.5, 70.25], [-146.75, 70.35], [-147.0, 70.25], [-147.25, 70.35], [-147.5, 70.25], [-147.75, 70.35], [-148.0, 70.25], [-148.25, 70.35], [-148.5, 70.25], [-148.75, 70.35], [-149.0, 70.25], [-149.25, 70.35], [-149.5, 70.25], [-149.75, 70.35], [-150.0, 70.25], [-150.25, 70.35], [-150.5, 70.25], [-151.03, 70.47], [-151.25, 71.0], [-151.15, 71.25], [-151.25, 71.5], [-151.03, 72.03], [-150.5, 72.25], [-150.25, 72.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "Arctic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-151.25, 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