{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:52.384701", "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": "2024-Mar-26_to_2024-Mar-30_129.0_69.0"}, "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": 2024030000569}, "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": "March 26 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 30 2024"}, "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": 63904.50963124273}, "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": ["Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 69.0}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 132.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 69.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[125.97, 68.53], [126.32, 68.68], [126.47, 69.03], [126.82, 69.18], [126.85, 69.25], [126.75, 69.5], [126.97, 70.03], 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"value": ["Russian-Arctic"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, 68.53], [126.32, 68.68], [126.47, 69.03], [126.82, 69.18], [126.85, 69.25], [126.75, 69.5], [126.97, 70.03], [127.5, 70.25], [128.0, 70.04], [128.5, 70.25], [128.75, 70.15], [129.0, 70.25], [129.25, 70.15], [129.5, 70.25], [130.03, 70.03], [130.25, 69.5], [130.15, 69.25], [130.25, 69.0], [130.15, 68.75], [130.25, 68.5], [130.03, 67.97], [129.68, 67.82], [129.53, 67.47], [129.18, 67.32], [129.03, 66.97], [128.5, 66.75], [128.25, 66.85], [128.0, 66.75], [127.75, 66.85], [127.63, 66.8], [127.75, 66.5], [127.53, 65.97], [127.0, 65.75], [126.75, 65.85], [126.5, 65.75], [125.97, 65.97], [125.75, 66.5], [125.88, 66.8], [125.47, 66.97], [125.25, 67.5], [125.47, 68.03], [125.82, 68.18], [125.97, 68.53]]]]}, "2024-03-27T11:30:00.000000000": {"type": 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