{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:37.980185", "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": "2017-Dec-05_to_2017-Dec-08_25.5_-24.5"}, "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": 2017120000201}, "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 05 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 08 2017"}, "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": 153650.34784267683}, "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": -24.5}, "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": 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": 22.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.47, -24.47], [23.0, -24.25], [23.5, -24.46], [23.82, -24.32], [23.97, -23.97], [24.5, -23.75], [24.75, -23.85], [24.82, -23.82], [24.97, -23.47], [25.5, -23.25], [25.75, -23.35], [26.0, -23.25], [26.25, -23.35], [26.5, -23.25], [26.75, -23.35], [27.0, -23.25], [27.53, -23.47], [27.68, -23.82], [27.75, -23.85], [28.0, -23.75], [28.25, -23.85], [28.5, -23.75], [29.03, -23.97], [29.25, -24.5], [29.15, -24.75], [29.18, -24.82], [29.53, -24.97], [29.75, -25.5], [29.65, -25.75], [29.68, -25.82], [30.03, -25.97], [30.25, -26.5], [30.15, -26.75], [30.25, -27.0], [30.15, -27.25], [30.25, -27.5], [30.03, -28.03], [29.5, -28.25], [28.97, -28.03], [28.82, -27.68], [28.75, -27.65], [28.5, -27.75], [27.97, -27.53], [27.82, -27.18], [27.75, -27.15], [27.5, -27.25], [26.97, -27.03], [26.75, -26.5], [26.85, -26.25], [26.82, -26.18], [26.75, -26.15], [26.68, -26.18], [26.53, -26.53], [26.0, -26.75], [25.75, -26.65], [25.5, -26.75], [24.97, -26.53], [24.82, -26.18], [24.75, -26.15], [24.5, -26.25], [24.25, -26.15], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.47, -26.03], [22.25, -25.5], [22.35, -25.25], [22.25, -25.0], [22.47, -24.47]]]]}, "2017-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.47, -24.47], [23.0, -24.25], [23.5, -24.46], [23.82, -24.32], [23.97, -23.97], [24.32, -23.82], [24.47, -23.47], [25.0, -23.25], [25.25, -23.35], [25.5, -23.25], [25.75, -23.35], [26.0, -23.25], [26.25, -23.35], [26.5, -23.25], [26.75, -23.35], [27.0, -23.25], [27.25, -23.35], [27.5, -23.25], [28.03, -23.47], [28.18, -23.82], [28.25, -23.85], [28.5, -23.75], [29.03, -23.97], [29.2, -24.37], [29.5, -24.25], [30.03, -24.47], [30.25, -25.0], [30.03, -25.53], [29.68, -25.68], [29.65, -25.75], [29.68, -25.82], [30.03, -25.97], [30.25, -26.5], [30.15, -26.75], [30.25, -27.0], [30.15, -27.25], [30.25, -27.5], [30.03, -28.03], [29.5, -28.25], [28.97, -28.03], [28.82, -27.68], [28.75, -27.65], [28.5, -27.75], [27.97, -27.53], [27.82, -27.18], [27.75, -27.15], [27.5, -27.25], [26.97, -27.03], [26.75, -26.5], [26.85, -26.25], [26.82, -26.18], [26.75, -26.15], [26.68, -26.18], [26.53, -26.53], [26.0, -26.75], [25.75, -26.65], [25.5, -26.75], [24.97, -26.53], [24.82, -26.18], [24.75, -26.15], [24.5, -26.25], [24.25, -26.15], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.47, -26.03], [22.25, -25.5], [22.35, -25.25], [22.25, -25.0], [22.47, -24.47]]]]}, "2017-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.47, -24.47], [23.0, -24.25], [23.5, -24.46], [23.82, -24.32], [23.97, -23.97], [24.32, -23.82], [24.47, -23.47], [25.0, -23.25], [25.25, -23.35], [25.5, -23.25], [25.75, -23.35], [26.0, -23.25], [26.25, -23.35], [26.5, -23.25], [26.75, -23.35], [27.0, -23.25], [27.25, -23.35], [27.5, -23.25], [28.03, -23.47], [28.18, -23.82], [28.25, -23.85], [28.5, -23.75], [29.03, -23.97], [29.2, -24.37], [29.5, -24.25], [30.03, -24.47], [30.25, -25.0], [30.03, -25.53], [29.68, -25.68], [29.65, -25.75], [29.68, -25.82], [30.03, -25.97], [30.25, -26.5], [30.15, -26.75], [30.25, -27.0], [30.15, -27.25], [30.25, -27.5], [30.03, -28.03], [29.5, -28.25], [28.97, -28.03], [28.82, -27.68], [28.75, -27.65], [28.5, -27.75], [27.97, -27.53], [27.82, -27.18], [27.75, -27.15], [27.5, -27.25], [26.97, -27.03], [26.75, -26.5], [26.85, -26.25], [26.82, -26.18], [26.75, -26.15], [26.68, -26.18], [26.53, -26.53], [26.0, -26.75], [25.75, -26.65], [25.5, -26.75], [24.97, -26.53], [24.82, -26.18], [24.75, -26.15], [24.5, -26.25], [24.25, -26.15], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.47, -26.03], [22.25, -25.5], [22.35, -25.25], [22.25, -25.0], [22.47, -24.47]]]]}, "2017-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, -27.0], [28.97, -26.47], [29.5, -26.25], [30.03, -26.47], [30.25, -27.0], [30.03, -27.53], [29.5, -27.75], [28.97, -27.53], [28.75, -27.0]]], [[[22.25, -25.0], [22.47, -24.47], [23.0, -24.25], [23.53, -24.47], [23.75, -25.0], [23.53, -25.53], [23.0, -25.75], [22.47, -25.53], [22.25, -25.0]]], [[[28.75, -25.0], [28.97, -24.47], [29.5, -24.25], [30.03, -24.47], [30.25, -25.0], [30.03, -25.53], [29.5, -25.75], [28.97, -25.53], [28.75, -25.0]]], [[[24.32, -23.82], [24.47, -23.47], [25.0, -23.25], [25.25, -23.35], [25.5, -23.25], [25.75, -23.35], [26.0, -23.25], [26.25, -23.35], [26.5, -23.25], [26.75, -23.35], [27.0, -23.25], [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], [27.18, -24.68], [27.03, -25.03], [26.5, -25.25], [26.25, -25.15], [26.18, -25.18], [26.03, -25.53], [25.5, -25.75], [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], [23.75, -24.5], [23.97, -23.97], [24.32, -23.82]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.645923051255522}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.360863920020295}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.037632201107726, 18.963658160697435, 18.656573286201024, 20.472667906883828]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.025934444286975, 12.815072580804951, 13.541629025359384, 15.132777807317382]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.040621036423378, -4.035763571623652, -4.201608003462646, -3.8486418329335748]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.645923051255522, -4.627642004340657, -5.435780043372972, -4.478771996740136]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8867830182119418, -1.5358406002783378, -1.5865193399613644, -1.4361790324764343]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.51052302318938, -1.8469691075486054, -1.961712495875602, -1.661009123179388]}}