{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:20.577867", "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": "2012-May-11_to_2012-May-15_5.0_16.0"}, "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": 2012050000682}, "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": "May 11 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 15 2012"}, "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": 98407.063906002}, "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": ["Mali", "Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "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": 16.0}, "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": 5.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "5.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 3.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 6.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-05-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[3.75, 16.0], [3.97, 16.53], [4.32, 16.68], [4.35, 16.75], [4.25, 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[3.97, 14.47], [3.82, 14.82], [3.47, 14.97], [3.32, 15.32], [2.97, 15.47], [2.75, 16.0]]]]}, "2012-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.75, 16.0], [2.97, 16.53], [3.32, 16.68], [3.47, 17.03], [3.82, 17.18], [3.97, 17.53], [4.5, 17.75], [4.75, 17.65], [5.0, 17.75], [5.25, 17.65], [5.5, 17.75], [6.03, 17.53], [6.18, 17.18], [6.53, 17.03], [6.75, 16.5], [6.65, 16.25], [6.75, 16.0], [6.65, 15.75], [6.75, 15.5], [6.53, 14.97], [6.18, 14.82], [6.15, 14.75], [6.18, 14.68], [6.53, 14.53], [6.75, 14.0], [6.65, 13.75], [6.75, 13.5], [6.53, 12.97], [6.18, 12.82], [6.03, 12.47], [5.5, 12.25], [5.2, 12.38], [5.03, 11.97], [4.5, 11.75], [3.97, 11.97], [3.75, 12.5], [3.85, 12.75], [3.75, 13.0], [3.97, 13.53], [4.32, 13.68], [4.35, 13.75], [4.25, 14.0], [4.35, 14.25], [4.32, 14.32], [3.97, 14.47], [3.82, 14.82], [3.47, 14.97], [3.32, 15.32], [2.97, 15.47], [2.75, 16.0]]]]}, "2012-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[2.75, 16.0], 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