{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:42.151860", "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-May-24_to_2018-May-29_346.5_25.0"}, "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": 2018050000963}, "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 24 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 29 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 69937.18227729222}, "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": ["Mauritania", "Morocco"]}, "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": 25.0}, "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": 346.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "346.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 346.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 351.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.03, 26.03], [-13.5, 26.25], [-12.97, 26.03], [-12.75, 25.5], [-12.85, 25.25], [-12.75, 25.0], [-12.97, 24.47], [-13.5, 24.25], [-14.03, 24.47], [-14.25, 25.0], [-14.15, 25.25], [-14.25, 25.5], [-14.03, 26.03]]]]}, "2018-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.15, 25.25], [-14.25, 25.5], [-14.03, 26.03], [-13.5, 26.25], [-12.97, 26.03], [-12.82, 25.68], [-12.47, 25.53], [-12.25, 25.0], [-12.47, 24.47], [-12.82, 24.32], [-12.97, 23.97], [-13.5, 23.75], [-14.03, 23.97], [-14.25, 24.5], [-14.15, 24.75], [-14.25, 25.0], [-14.15, 25.25]]]]}, "2018-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.15, 24.25], [-14.25, 24.5], [-14.15, 24.75], [-14.25, 25.0], [-14.15, 25.25], [-14.25, 25.5], [-14.03, 26.03], [-13.5, 26.25], [-13.25, 26.15], [-13.0, 26.25], [-12.47, 26.03], [-12.32, 25.68], [-12.25, 25.65], [-12.0, 25.75], [-11.57, 25.57], [-11.75, 26.0], [-11.65, 26.25], [-11.75, 26.5], [-11.53, 27.03], [-11.0, 27.25], [-10.47, 27.03], [-10.32, 26.68], [-9.97, 26.53], [-9.75, 26.0], [-9.97, 25.47], [-10.5, 25.25], [-10.75, 25.35], [-11.0, 25.25], [-11.43, 25.43], [-11.25, 25.0], [-11.47, 24.47], [-11.87, 24.3], [-11.75, 24.0], [-11.97, 23.47], [-12.32, 23.32], [-12.47, 22.97], [-13.0, 22.75], [-13.25, 22.85], [-13.5, 22.75], [-14.03, 22.97], [-14.25, 23.5], [-14.15, 23.75], [-14.25, 24.0], [-14.15, 24.25]]]]}, "2018-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.15, 24.25], [-14.25, 24.5], [-14.15, 24.75], [-14.25, 25.0], [-14.15, 25.25], [-14.25, 25.5], [-14.03, 26.03], [-13.5, 26.25], [-13.25, 26.15], [-13.0, 26.25], [-12.47, 26.03], [-12.32, 25.68], [-12.25, 25.65], [-12.18, 25.68], [-12.03, 26.03], [-11.68, 26.18], [-11.65, 26.25], [-11.75, 26.5], [-11.53, 27.03], [-11.0, 27.25], [-10.47, 27.03], [-10.32, 26.68], [-9.97, 26.53], [-9.82, 26.18], [-9.75, 26.15], [-9.68, 26.18], [-9.65, 26.25], [-9.75, 26.5], [-9.53, 27.03], [-9.0, 27.25], [-8.75, 27.15], [-8.5, 27.25], [-7.97, 27.03], [-7.75, 26.5], [-7.97, 25.97], [-8.32, 25.82], [-8.47, 25.47], [-8.82, 25.32], [-8.97, 24.97], [-9.32, 24.82], [-9.47, 24.47], [-10.0, 24.25], [-10.53, 24.47], [-10.68, 24.82], [-10.75, 24.85], [-11.0, 24.75], [-11.25, 24.85], [-11.32, 24.82], [-11.47, 24.47], [-11.87, 24.3], [-11.75, 24.0], [-11.97, 23.47], [-12.32, 23.32], [-12.47, 22.97], [-13.0, 22.75], [-13.25, 22.85], [-13.5, 22.75], [-14.03, 22.97], [-14.25, 23.5], [-14.15, 23.75], [-14.25, 24.0], [-14.15, 24.25]]]]}, "2018-05-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.15, 24.25], [-14.25, 24.5], [-14.15, 24.75], [-14.25, 25.0], [-14.15, 25.25], [-14.25, 25.5], [-14.03, 26.03], [-13.5, 26.25], [-13.25, 26.15], [-13.0, 26.25], [-12.47, 26.03], [-12.32, 25.68], [-12.25, 25.65], [-12.18, 25.68], [-12.03, 26.03], [-11.68, 26.18], [-11.65, 26.25], [-11.75, 26.5], [-11.53, 27.03], [-11.0, 27.25], [-10.47, 27.03], [-10.32, 26.68], [-9.97, 26.53], [-9.82, 26.18], [-9.75, 26.15], [-9.68, 26.18], [-9.65, 26.25], [-9.75, 26.5], [-9.53, 27.03], [-9.0, 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