{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:20.125497", "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": "2020-Sep-04_to_2020-Sep-08_344.5_15.5"}, "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": 2020090000188}, "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 04 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 08 2020"}, "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": 109719.99429771598}, "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", "Senegal"]}, "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": 15.5}, "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": 344.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "344.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 342.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 349.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.03, 16.53], [-11.5, 16.75], [-10.97, 16.53], [-10.75, 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15.53]], [[-12.15, 15.75], [-12.2, 15.88], [-12.32, 15.82], [-12.35, 15.75], [-12.25, 15.5], [-12.15, 15.75]]]]}, "2020-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.53, 15.53], [-17.18, 15.68], [-17.03, 16.03], [-16.5, 16.25], [-16.25, 16.15], [-16.0, 16.25], [-15.75, 16.15], [-15.68, 16.18], [-15.53, 16.53], [-15.0, 16.75], [-14.75, 16.65], [-14.68, 16.68], [-14.53, 17.03], [-14.12, 17.2], [-14.18, 17.32], [-14.25, 17.35], [-14.5, 17.25], [-15.03, 17.47], [-15.25, 18.0], [-15.03, 18.53], [-14.5, 18.75], [-14.25, 18.65], [-14.0, 18.75], [-13.47, 18.53], [-13.32, 18.18], [-13.25, 18.15], [-13.0, 18.25], [-12.75, 18.15], [-12.68, 18.18], [-12.53, 18.53], [-12.0, 18.75], [-11.47, 18.53], [-11.32, 18.18], [-11.25, 18.15], [-11.0, 18.25], [-10.47, 18.03], [-10.25, 17.5], [-10.35, 17.25], [-10.25, 17.0], [-10.47, 16.47], [-10.82, 16.32], [-10.85, 16.25], [-10.75, 16.0], [-10.85, 15.75], [-10.75, 15.5], [-10.97, 14.97], [-11.5, 14.75], [-12.03, 14.97], [-12.25, 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16.47], [-11.5, 16.25], [-12.03, 16.47]]], [[[-15.25, 18.0], [-15.03, 18.53], [-14.5, 18.75], [-14.25, 18.65], [-14.0, 18.75], [-13.47, 18.53], [-13.32, 18.18], [-12.97, 18.03], [-12.75, 17.5], [-12.97, 16.97], [-13.5, 16.75], [-14.03, 16.97], [-14.18, 17.32], [-14.25, 17.35], [-14.5, 17.25], [-15.03, 17.47], [-15.25, 18.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.171330437422171}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.691199815621246}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.447923735110976, 27.64726691576442, 27.61973441056199, 28.025613460061834, 29.084284647443724]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.722343394823554, 25.94703643337067, 24.92160467400538, 26.298969216120383, 28.939104383351832]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1205317291937416, -2.619662614999052, -2.8186768737920747, -2.879417478948899, -3.0837481611350483]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.7374467961570303, -3.820229954340107, -4.171330437422171, -3.7949253726550864, -3.308557707183752]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5175841035677773, -1.6450083389466583, -1.8314450516427703, -1.6494570416623142, -1.6045797766591336]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8375474574187833, 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