{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:19.528834", "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": "2022-Sep-16_to_2022-Sep-19_350.0_21.5"}, "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": 2022090000612}, "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": "September 16 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 19 2022"}, "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": 470228.7581322298}, "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", "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": 21.5}, "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": 350.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "350.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.65, 22.25], [-16.75, 22.5], [-16.53, 23.03], [-16.18, 23.18], [-16.15, 23.25], [-16.25, 23.5], [-16.03, 24.03], [-15.68, 24.18], [-15.53, 24.53], [-15.0, 24.75], [-14.75, 24.65], [-14.5, 24.75], [-14.25, 24.65], [-14.0, 24.75], [-13.75, 24.65], [-13.5, 24.75], [-13.25, 24.65], [-13.0, 24.75], [-12.75, 24.65], [-12.5, 24.75], [-12.25, 24.65], [-12.0, 24.75], [-11.75, 24.65], [-11.5, 24.75], [-11.25, 24.65], [-11.18, 24.68], [-11.03, 25.03], [-10.5, 25.25], [-10.25, 25.15], [-10.18, 25.18], [-10.03, 25.53], [-9.68, 25.68], [-9.53, 26.03], [-9.0, 26.25], [-8.75, 26.15], [-8.5, 26.25], [-8.25, 26.15], [-8.0, 26.25], [-7.75, 26.15], [-7.5, 26.25], [-7.25, 26.15], [-7.0, 26.25], [-6.75, 26.15], [-6.5, 26.25], [-6.25, 26.15], [-6.0, 26.25], [-5.47, 26.03], [-5.25, 25.5], [-5.35, 25.25], [-5.25, 25.0], [-5.35, 24.75], [-5.25, 24.5], [-5.47, 23.97], [-5.82, 23.82], [-5.85, 23.75], [-5.75, 23.5], [-5.97, 22.97], [-6.32, 22.82], [-6.35, 22.75], [-6.25, 22.5], [-6.47, 21.97], [-6.82, 21.82], [-6.85, 21.75], [-6.75, 21.5], [-6.97, 20.97], [-7.32, 20.82], [-7.47, 20.47], [-7.82, 20.32], [-7.97, 19.97], [-8.5, 19.75], [-8.75, 19.85], [-9.0, 19.75], [-9.25, 19.85], [-9.5, 19.75], [-9.75, 19.85], [-10.0, 19.75], [-10.25, 19.85], [-10.5, 19.75], [-10.75, 19.85], [-11.0, 19.75], [-11.53, 19.97], [-11.68, 20.32], [-11.75, 20.35], [-11.82, 20.32], [-11.97, 19.97], [-12.5, 19.75], [-13.03, 19.97], [-13.18, 20.32], [-13.25, 20.35], [-13.32, 20.32], [-13.47, 19.97], [-14.0, 19.75], [-14.53, 19.97], [-14.68, 20.32], [-14.75, 20.35], [-15.0, 20.25], [-15.25, 20.35], [-15.5, 20.25], [-16.03, 20.47], [-16.18, 20.82], [-16.53, 20.97], [-16.75, 21.5], [-16.65, 21.75], [-16.75, 22.0], [-16.65, 22.25]]]]}, "2022-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.15, 21.75], [-17.25, 22.0], [-17.03, 22.53], [-16.68, 22.68], [-16.53, 23.03], [-16.18, 23.18], [-16.15, 23.25], [-16.25, 23.5], [-16.03, 24.03], [-15.68, 24.18], [-15.53, 24.53], [-15.0, 24.75], [-14.75, 24.65], [-14.5, 24.75], [-14.25, 24.65], [-14.0, 24.75], [-13.75, 24.65], [-13.5, 24.75], [-13.25, 24.65], [-13.0, 24.75], [-12.75, 24.65], [-12.5, 24.75], [-12.25, 24.65], [-12.0, 24.75], [-11.75, 24.65], [-11.5, 24.75], [-11.25, 24.65], [-11.18, 24.68], [-11.03, 25.03], [-10.5, 25.25], [-10.25, 25.15], [-10.18, 25.18], [-10.03, 25.53], [-9.68, 25.68], [-9.53, 26.03], [-9.0, 26.25], [-8.75, 26.15], [-8.5, 26.25], [-8.25, 26.15], [-8.0, 26.25], [-7.75, 26.15], [-7.5, 26.25], [-7.25, 26.15], [-7.0, 26.25], [-6.75, 26.15], [-6.5, 26.25], [-6.25, 26.15], [-6.0, 26.25], [-5.47, 26.03], [-5.25, 25.5], [-5.35, 25.25], [-5.25, 25.0], [-5.35, 24.75], [-5.25, 24.5], [-5.47, 23.97], [-5.82, 23.82], [-5.85, 23.75], [-5.75, 23.5], [-5.97, 22.97], [-6.32, 22.82], [-6.35, 22.75], [-6.25, 22.5], [-6.47, 21.97], [-6.82, 21.82], [-6.85, 21.75], [-6.75, 21.5], [-6.97, 20.97], [-7.32, 20.82], [-7.47, 20.47], [-7.82, 20.32], [-7.97, 19.97], [-8.5, 19.75], [-8.75, 19.85], [-9.0, 19.75], [-9.25, 19.85], [-9.5, 19.75], [-9.75, 19.85], [-10.0, 19.75], [-10.25, 19.85], [-10.5, 19.75], [-10.75, 19.85], [-11.0, 19.75], [-11.53, 19.97], [-11.68, 20.32], [-11.75, 20.35], [-11.82, 20.32], [-11.97, 19.97], [-12.5, 19.75], [-13.03, 19.97], [-13.18, 20.32], [-13.25, 20.35], [-13.32, 20.32], [-13.47, 19.97], [-14.0, 19.75], [-14.53, 19.97], [-14.68, 20.32], [-14.75, 20.35], [-14.82, 20.32], [-14.97, 19.97], [-15.5, 19.75], [-15.75, 19.85], [-16.0, 19.75], [-16.53, 19.97], [-16.68, 20.32], [-17.03, 20.47], [-17.25, 21.0], [-17.15, 21.25], [-17.25, 21.5], [-17.15, 21.75]]]]}, "2022-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.15, 21.75], [-17.25, 22.0], [-17.03, 22.53], [-16.68, 22.68], [-16.53, 23.03], [-16.18, 23.18], [-16.15, 23.25], [-16.25, 23.5], [-16.03, 24.03], [-15.68, 24.18], [-15.53, 24.53], [-15.0, 24.75], [-14.75, 24.65], [-14.5, 24.75], [-14.25, 24.65], [-14.0, 24.75], [-13.75, 24.65], [-13.5, 24.75], [-13.25, 24.65], [-13.0, 24.75], [-12.75, 24.65], [-12.5, 24.75], [-12.25, 24.65], [-12.0, 24.75], [-11.75, 24.65], [-11.5, 24.75], [-11.25, 24.65], [-11.18, 24.68], [-11.03, 25.03], [-10.5, 25.25], [-10.25, 25.15], [-10.18, 25.18], [-10.03, 25.53], [-9.68, 25.68], [-9.53, 26.03], [-9.0, 26.25], [-8.75, 26.15], [-8.5, 26.25], [-8.25, 26.15], [-8.0, 26.25], [-7.75, 26.15], [-7.5, 26.25], [-7.25, 26.15], [-7.0, 26.25], [-6.75, 26.15], [-6.5, 26.25], [-6.25, 26.15], [-6.0, 26.25], [-5.47, 26.03], [-5.25, 25.5], [-5.35, 25.25], [-5.25, 25.0], [-5.35, 24.75], [-5.25, 24.5], [-5.47, 23.97], [-5.82, 23.82], [-5.85, 23.75], [-5.75, 23.5], [-5.97, 22.97], [-6.32, 22.82], [-6.35, 22.75], [-6.25, 22.5], [-6.47, 21.97], [-6.82, 21.82], [-6.85, 21.75], [-6.75, 21.5], [-6.97, 20.97], [-7.32, 20.82], [-7.47, 20.47], [-7.82, 20.32], [-7.97, 19.97], [-8.5, 19.75], [-8.75, 19.85], [-9.0, 19.75], [-9.25, 19.85], [-9.5, 19.75], [-9.75, 19.85], [-10.0, 19.75], [-10.25, 19.85], [-10.5, 19.75], [-10.75, 19.85], [-11.0, 19.75], [-11.53, 19.97], [-11.68, 20.32], [-11.75, 20.35], [-11.82, 20.32], [-11.97, 19.97], [-12.5, 19.75], [-13.03, 19.97], [-13.18, 20.32], [-13.25, 20.35], [-13.32, 20.32], [-13.47, 19.97], [-14.0, 19.75], [-14.53, 19.97], [-14.68, 20.32], [-14.75, 20.35], [-14.82, 20.32], [-14.97, 19.97], [-15.5, 19.75], [-15.75, 19.85], [-16.0, 19.75], [-16.53, 19.97], [-16.68, 20.32], [-17.03, 20.47], [-17.25, 21.0], [-17.15, 21.25], [-17.25, 21.5], [-17.15, 21.75]]]]}, "2022-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.15, 21.75], [-17.25, 22.0], [-17.03, 22.53], [-16.68, 22.68], [-16.53, 23.03], [-16.0, 23.25], [-15.75, 23.15], [-15.5, 23.25], [-14.97, 23.03], [-14.82, 22.68], [-14.47, 22.53], [-14.25, 22.0], [-14.35, 21.75], [-14.25, 21.5], [-14.35, 21.25], [-14.25, 21.0], [-14.47, 20.47], [-14.82, 20.32], [-14.97, 19.97], [-15.5, 19.75], [-15.75, 19.85], [-16.0, 19.75], [-16.53, 19.97], [-16.68, 20.32], [-17.03, 20.47], [-17.25, 21.0], [-17.15, 21.25], [-17.25, 21.5], [-17.15, 21.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.7049994705492395}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.094745904954566}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.73003285535225, 26.559122054556042, 26.55379435918377, 26.790539059230014]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.88620708344257, 22.665663951540353, 22.495010435925508, 23.351789067191646]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.547991934066624, -5.4817467905362705, -5.3205126919741925, -4.208946866952292]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.7133580227769585, -6.7049994705492395, -6.417005406563646, -5.128871245938228]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8437289061387938, -2.222791000606213, -2.1205635213335428, -1.5481284355869795]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3113244143724696, -3.082118692403287, -2.8636176634317208, -1.7735584136473832]}}