{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:43.106845", "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": "2018-Dec-28_to_2018-Dec-31_29.0_24.0"}, "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": 2018120000920}, "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": "December 28 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 31 2018"}, "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": 211000.9289831193}, "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": ["Egypt", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": 24.0}, "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": 29.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "29.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 26.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.97, 23.53], [26.32, 23.68], [26.47, 24.03], [27.0, 24.25], 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{"type": "MultiPolygon", "coordinates": [[[[25.97, 23.53], [26.32, 23.68], [26.47, 24.03], [27.0, 24.25], [27.5, 24.04], [27.82, 24.18], [27.97, 24.53], [28.32, 24.68], [28.47, 25.03], [29.0, 25.25], [29.53, 25.03], [29.68, 24.68], [30.0, 24.54], [30.5, 24.75], [30.75, 24.65], [31.0, 24.75], [31.25, 24.65], [31.32, 24.68], [31.47, 25.03], [32.0, 25.25], [32.53, 25.03], [32.68, 24.68], [33.03, 24.53], [33.2, 24.13], [33.5, 24.25], [34.03, 24.03], [34.25, 23.5], [34.15, 23.25], [34.25, 23.0], [34.03, 22.47], [33.68, 22.32], [33.53, 21.97], [33.18, 21.82], [33.03, 21.47], [32.68, 21.32], [32.53, 20.97], [32.18, 20.82], [32.03, 20.47], [31.5, 20.25], [31.25, 20.35], [31.0, 20.25], [30.5, 20.46], [30.0, 20.25], [29.47, 20.47], [29.3, 20.88], [29.18, 20.82], [29.03, 20.47], [28.5, 20.25], [28.0, 20.46], [27.5, 20.25], [26.97, 20.47], [26.75, 21.0], [26.85, 21.25], [26.82, 21.32], [26.47, 21.47], [26.32, 21.82], [25.97, 21.97], [25.75, 22.5], [25.85, 22.75], [25.75, 23.0], [25.97, 23.53]]]]}, 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