{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:12:40.214945", "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-14_to_2018-May-17_25.5_-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": 2018050000622}, "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 14 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 17 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": 162669.2049116347}, "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": ["Botswana", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "W.Southern-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": -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": 25.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 23.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 30.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.25, -24.5], [24.47, -23.97], [24.82, -23.82], [24.85, -23.75], [24.75, -23.5], [24.97, -22.97], [25.5, -22.75], [25.75, -22.85], [26.0, -22.75], [26.25, -22.85], [26.5, -22.75], [26.75, -22.85], [27.0, -22.75], [27.25, -22.85], [27.5, -22.75], [27.75, -22.85], [28.0, -22.75], [28.53, -22.97], [28.7, -23.37], [29.0, -23.25], [29.53, -23.47], [29.75, -24.0], [29.63, -24.3], [30.0, -24.46], [30.5, -24.25], [31.03, -24.47], [31.25, -25.0], [31.15, -25.25], [31.25, -25.5], [31.03, -26.03], [30.5, -26.25], [30.25, -26.15], [30.18, -26.18], [30.03, -26.53], [29.68, -26.68], [29.53, -27.03], [29.0, -27.25], [28.75, -27.15], [28.68, -27.18], [28.53, -27.53], [28.0, -27.75], [27.47, -27.53], [27.25, -27.0], [27.35, -26.75], [27.32, -26.68], [27.25, -26.65], [27.0, -26.75], [26.47, -26.53], [26.32, -26.18], [26.25, -26.15], [26.0, -26.25], [25.47, -26.03], [25.32, -25.68], [24.97, -25.53], [24.82, -25.18], [24.47, -25.03], [24.25, -24.5]]]]}, "2018-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, -24.0], [23.47, -23.47], [23.82, -23.32], [23.97, -22.97], [24.5, -22.75], [24.75, -22.85], [25.0, -22.75], [25.25, -22.85], [25.5, -22.75], [25.75, -22.85], [26.0, -22.75], [26.25, -22.85], [26.5, -22.75], [26.75, -22.85], [27.0, -22.75], [27.25, -22.85], [27.5, -22.75], [27.75, -22.85], [28.0, -22.75], [28.53, -22.97], [28.7, -23.37], [29.0, -23.25], [29.53, -23.47], [29.75, -24.0], [29.63, -24.3], [30.0, -24.46], [30.5, -24.25], [31.03, -24.47], [31.25, -25.0], [31.15, -25.25], [31.25, -25.5], [31.03, -26.03], [30.5, -26.25], [30.25, -26.15], [30.18, -26.18], [30.03, -26.53], [29.68, -26.68], [29.53, -27.03], [29.0, -27.25], [28.75, -27.15], [28.68, -27.18], [28.53, -27.53], [28.0, -27.75], [27.47, -27.53], [27.25, -27.0], [27.35, -26.75], [27.32, -26.68], [27.25, -26.65], [27.0, -26.75], [26.47, -26.53], [26.32, -26.18], [26.25, -26.15], [26.0, -26.25], [25.47, -26.03], [25.32, -25.68], [25.25, -25.65], [25.0, -25.75], [24.75, -25.65], [24.5, -25.75], [23.97, -25.53], [23.75, -25.0], [23.85, -24.75], [23.82, -24.68], [23.47, -24.53], [23.25, -24.0]]]]}, "2018-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, -24.0], [23.47, -23.47], [23.82, -23.32], [23.97, -22.97], [24.5, -22.75], [24.75, -22.85], [25.0, -22.75], [25.25, -22.85], [25.5, -22.75], [25.75, -22.85], [26.0, -22.75], [26.25, -22.85], [26.5, -22.75], [26.75, -22.85], [27.0, -22.75], [27.25, -22.85], [27.5, -22.75], [27.75, -22.85], [28.0, -22.75], [28.53, -22.97], [28.7, -23.37], [29.0, -23.25], [29.53, -23.47], [29.75, -24.0], [29.63, -24.3], [30.0, -24.46], [30.5, -24.25], [31.03, -24.47], [31.25, -25.0], [31.15, -25.25], [31.25, -25.5], [31.03, -26.03], [30.5, -26.25], [30.25, -26.15], [30.18, -26.18], [30.03, -26.53], [29.68, -26.68], [29.53, -27.03], [29.0, -27.25], [28.75, -27.15], [28.68, -27.18], [28.53, -27.53], [28.0, -27.75], [27.47, -27.53], [27.25, -27.0], [27.35, -26.75], [27.32, -26.68], [27.25, -26.65], [27.0, -26.75], [26.47, -26.53], [26.32, -26.18], [26.25, -26.15], [26.0, -26.25], [25.47, -26.03], [25.32, -25.68], [25.25, -25.65], [25.0, -25.75], [24.75, -25.65], [24.5, -25.75], [23.97, -25.53], [23.75, -25.0], [23.85, -24.75], [23.82, -24.68], [23.47, -24.53], [23.25, -24.0]]]]}, "2018-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.25, -24.0], [23.47, -23.47], [23.82, -23.32], [23.97, -22.97], [24.5, -22.75], [24.75, -22.85], [25.0, -22.75], [25.25, -22.85], [25.5, -22.75], [25.75, -22.85], [26.0, -22.75], [26.25, -22.85], [26.5, -22.75], [27.03, -22.97], [27.18, -23.32], [27.25, -23.35], [27.5, -23.25], [28.03, -23.47], [28.25, -24.0], [28.03, -24.53], [27.5, -24.75], [27.25, -24.65], [27.0, -24.75], [26.75, -24.65], [26.5, -24.75], [26.0, -24.54], [25.68, -24.68], [25.65, -24.75], [25.75, -25.0], [25.53, -25.53], [25.0, -25.75], [24.75, -25.65], [24.5, -25.75], [23.97, -25.53], [23.75, -25.0], [23.85, -24.75], [23.82, -24.68], [23.47, -24.53], [23.25, -24.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.225791744015169}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0201887460096404}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.352581199007943, 12.837561836125474, 12.708728173461623, 14.256382629392817]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.36696803378328, 8.609253734650963, 7.611055544888018, 12.940868518672971]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.323177339673442, -2.910824656508456, -2.9635742453484486, -2.6750217801488816]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.225791744015169, -3.581444596541587, -4.135833724797237, -3.2022814323963757]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7880229100086158, -1.5739985801383207, -1.6597920007945328, -1.4779334654595877]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2716754833287753, -1.9973704830460972, -2.282543233681054, -1.7702361144933583]}}