{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:21.942870", "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-26_to_2022-Sep-30_10.0_13.0"}, "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": 2022090000884}, "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 26 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 30 2022"}, "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": 51206.77879382719}, "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": ["Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": 13.0}, "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": 10.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "10.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 9.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 14.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, 12.47], [11.75, 13.0], [11.97, 13.53], [12.5, 13.75], 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12.32], [10.25, 12.35], [10.0, 12.25], [9.75, 12.35], [9.5, 12.25], [8.97, 12.47], [8.75, 13.0], [8.85, 13.25], [8.75, 13.5], [8.97, 14.03]]]]}, "2022-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 14.03], [9.5, 14.25], [9.75, 14.15], [10.0, 14.25], [10.53, 14.03], [10.68, 13.68], [10.75, 13.65], [11.0, 13.75], [11.25, 13.65], [11.5, 13.75], [11.75, 13.65], [11.82, 13.68], [11.97, 14.03], [12.5, 14.25], [13.03, 14.03], [13.18, 13.68], [13.25, 13.65], [13.5, 13.75], [13.75, 13.65], [14.0, 13.75], [14.53, 13.53], [14.75, 13.0], [14.53, 12.47], [14.0, 12.25], [13.75, 12.35], [13.68, 12.32], [13.53, 11.97], [13.0, 11.75], [12.75, 11.85], [12.5, 11.75], [12.25, 11.85], [12.0, 11.75], [11.5, 11.96], [11.0, 11.75], [10.47, 11.97], [10.32, 12.32], [10.25, 12.35], [10.0, 12.25], [9.75, 12.35], [9.5, 12.25], [8.97, 12.47], [8.75, 13.0], [8.85, 13.25], [8.75, 13.5], [8.97, 14.03]]]]}, "2022-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.97, 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27.12372167667803]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8783305477318493, -1.8172106033222022, -1.8297890629136593, -2.626789110578169, -2.150701116561043]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.086952856098378, -2.0426971938844076, -2.2376719598376553, -3.053345176883056, -2.755275258560914]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5244283461882135, -1.4799460386226175, -1.5078295114481683, -2.155278491360818, -1.7785013171628001]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6778890937267703, -1.6146005850868934, 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