{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:19.944594", "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-18_to_2022-Sep-23_356.0_16.0"}, "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": 2022090000654}, "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 18 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 23 2022"}, "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": 62334.703822171825}, "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"]}, "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": 16.0}, "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": 356.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "356.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 354.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-2.5, 16.25], [-1.97, 16.03], [-1.75, 15.5], [-1.97, 14.97], [-2.5, 14.75], [-3.03, 14.97], [-3.25, 15.5], [-3.03, 16.03], [-2.5, 16.25]]]]}, "2022-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.53, 16.47], [-5.75, 17.0], [-5.53, 17.53], [-5.0, 17.75], [-4.75, 17.65], [-4.5, 17.75], [-4.25, 17.65], [-4.0, 17.75], [-3.75, 17.65], [-3.5, 17.75], [-3.25, 17.65], [-3.0, 17.75], [-2.47, 17.53], [-2.32, 17.18], [-1.97, 17.03], [-1.82, 16.68], [-1.47, 16.53], [-1.25, 16.0], [-1.35, 15.75], [-1.25, 15.5], [-1.47, 14.97], [-1.82, 14.82], [-1.97, 14.47], [-2.5, 14.25], [-3.03, 14.47], [-3.18, 14.82], [-3.25, 14.85], [-3.5, 14.75], [-3.75, 14.85], [-4.0, 14.75], [-4.53, 14.97], [-4.75, 15.5], [-4.65, 15.75], [-4.75, 16.0], [-4.65, 16.25], [-4.68, 16.32], [-4.75, 16.35], [-5.0, 16.25], [-5.53, 16.47]]]]}, "2022-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.75, 17.0], [-5.53, 17.53], [-5.0, 17.75], [-4.75, 17.65], [-4.5, 17.75], [-4.25, 17.65], [-4.0, 17.75], [-3.75, 17.65], [-3.5, 17.75], [-3.25, 17.65], [-3.0, 17.75], [-2.47, 17.53], [-2.32, 17.18], [-1.97, 17.03], [-1.82, 16.68], [-1.47, 16.53], [-1.25, 16.0], [-1.35, 15.75], [-1.25, 15.5], [-1.47, 14.97], [-1.82, 14.82], [-1.97, 14.47], [-2.5, 14.25], [-3.03, 14.47], [-3.18, 14.82], [-3.25, 14.85], [-3.5, 14.75], [-3.75, 14.85], [-4.0, 14.75], [-4.53, 14.97], [-4.75, 15.5], [-4.65, 15.75], [-4.68, 15.82], [-5.03, 15.97], [-5.18, 16.32], [-5.53, 16.47], [-5.75, 17.0]]]]}, "2022-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.75, 17.0], [-5.53, 17.53], [-5.0, 17.75], [-4.75, 17.65], [-4.5, 17.75], [-4.25, 17.65], [-4.0, 17.75], [-3.75, 17.65], [-3.5, 17.75], [-3.25, 17.65], [-3.0, 17.75], [-2.47, 17.53], [-2.32, 17.18], [-1.97, 17.03], [-1.82, 16.68], [-1.47, 16.53], [-1.25, 16.0], [-1.35, 15.75], [-1.25, 15.5], [-1.47, 14.97], [-1.82, 14.82], [-1.97, 14.47], [-2.5, 14.25], [-3.03, 14.47], [-3.18, 14.82], [-3.25, 14.85], [-3.5, 14.75], [-3.75, 14.85], [-4.0, 14.75], [-4.53, 14.97], [-4.75, 15.5], [-4.65, 15.75], [-4.68, 15.82], [-5.03, 15.97], [-5.18, 16.32], [-5.53, 16.47], [-5.75, 17.0]]]]}, "2022-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.25, 16.5], [-5.03, 17.03], [-4.5, 17.25], [-4.25, 17.15], [-4.0, 17.25], [-3.7, 17.12], [-3.53, 17.53], [-3.0, 17.75], [-2.47, 17.53], [-2.32, 17.18], [-1.97, 17.03], [-1.82, 16.68], [-1.47, 16.53], [-1.25, 16.0], [-1.35, 15.75], [-1.25, 15.5], [-1.47, 14.97], [-2.0, 14.75], [-2.25, 14.85], [-2.5, 14.75], [-3.03, 14.97], [-3.25, 15.5], [-3.15, 15.75], [-3.18, 15.82], [-3.3, 15.88], [-3.47, 15.47], [-4.0, 15.25], [-4.53, 15.47], [-4.68, 15.82], [-5.03, 15.97], [-5.25, 16.5]]]]}, "2022-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-1.97, 16.53], [-1.75, 16.0], [-1.97, 15.47], [-2.5, 15.25], [-3.03, 15.47], [-3.25, 16.0], [-3.03, 16.53], [-2.5, 16.75], [-1.97, 16.53]]], [[[-5.03, 17.03], [-4.5, 17.25], [-4.25, 17.15], [-4.0, 17.25], [-3.47, 17.03], [-3.25, 16.5], [-3.35, 16.25], [-3.25, 16.0], [-3.47, 15.47], [-4.0, 15.25], [-4.53, 15.47], [-4.68, 15.82], [-5.03, 15.97], [-5.25, 16.5], [-5.03, 17.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.086224239528974}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.8349198114342427}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.6648290707995, 28.85418915121204, 28.95249047535026, 28.433702232597398, 29.571905580352222, 29.60985353316653]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.6648290707995, 27.769347202020697, 27.08207895277195, 27.050642778842985, 28.554924940647652, 29.506257050900388]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": 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