{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:09.012209", "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-Oct-07_to_2021-Oct-10_27.0_48.5"}, "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": 2021100000318}, "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": "October 07 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 10 2021"}, "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": 88208.11898795106}, "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": ["Romania", "Ukraine"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "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": 48.5}, "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": 27.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "27.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 24.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[24.0, 49.75], [24.25, 49.65], [24.5, 49.75], [25.03, 49.53], [25.18, 49.18], [25.25, 49.15], [25.5, 49.25], [25.75, 49.15], 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49.53], [24.0, 49.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["West&Central-Europe", "Mediterranean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-10-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.97, 49.53], [27.32, 49.68], [27.47, 50.03], [27.82, 50.18], [27.97, 50.53], [28.32, 50.68], [28.47, 51.03], [29.0, 51.25], [29.53, 51.03], [29.68, 50.68], [30.03, 50.53], [30.25, 50.0], [30.03, 49.47], [29.68, 49.32], [29.53, 48.97], [29.0, 48.75], [28.75, 48.85], [28.68, 48.82], [28.53, 48.47], [28.18, 48.32], [28.03, 47.97], [27.5, 47.75], [27.25, 47.85], [27.0, 47.75], [26.47, 47.97], [26.25, 48.5], [26.47, 49.03], [26.82, 49.18], [26.97, 49.53]]]]}, "2021-10-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 48.47], [23.25, 49.0], [23.47, 49.53], [24.0, 49.75], [24.25, 49.65], 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