{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:55.684502", "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": "2021-Aug-14_to_2021-Aug-17_46.0_-24.0"}, "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": 2021080000630}, "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": "August 14 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 17 2021"}, "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": 51185.9437195182}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "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": -24.0}, "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": 46.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 45.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 47.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, -22.97], [45.5, -22.75], [46.03, -22.97], [46.18, -23.32], [46.25, -23.35], [46.32, -23.32], [46.35, -23.25], [46.25, -23.0], [46.47, -22.47], [47.0, -22.25], [47.53, -22.47], [47.75, -23.0], [47.65, -23.25], [47.75, -23.5], [47.65, -23.75], [47.75, -24.0], [47.65, -24.25], [47.75, -24.5], [47.53, -25.03], [47.0, -25.25], [46.75, -25.15], [46.5, -25.25], [46.25, -25.15], [46.0, -25.25], [45.47, -25.03], [45.32, -24.68], [44.97, -24.53], [44.75, -24.0], [44.85, -23.75], [44.75, -23.5], [44.97, -22.97]]]]}, "2021-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, -22.97], [45.5, -22.75], [46.03, -22.97], [46.18, -23.32], [46.25, -23.35], [46.32, -23.32], [46.35, -23.25], [46.25, -23.0], [46.35, -22.75], [46.32, -22.68], [45.97, -22.53], [45.75, -22.0], [45.85, -21.75], [45.75, -21.5], [45.97, -20.97], [46.5, -20.75], [46.75, -20.85], [47.0, -20.75], [47.25, -20.85], [47.5, -20.75], [48.03, -20.97], [48.25, -21.5], [48.15, -21.75], [48.25, -22.0], [48.15, -22.25], [48.25, -22.5], [48.03, -23.03], [47.68, -23.18], [47.65, -23.25], [47.75, -23.5], [47.65, -23.75], [47.75, -24.0], [47.65, -24.25], [47.75, -24.5], [47.53, -25.03], [47.0, -25.25], [46.75, -25.15], [46.5, -25.25], [46.25, -25.15], [46.0, -25.25], [45.47, -25.03], [45.32, -24.68], [44.97, -24.53], [44.75, -24.0], [44.85, -23.75], [44.75, -23.5], [44.97, -22.97]]]]}, "2021-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[44.97, -22.97], [45.5, -22.75], [46.03, -22.97], [46.18, -23.32], [46.25, -23.35], [46.32, -23.32], [46.35, -23.25], [46.25, -23.0], [46.35, -22.75], [46.32, -22.68], [45.97, -22.53], [45.75, -22.0], [45.85, -21.75], [45.75, -21.5], [45.97, -20.97], [46.5, -20.75], [46.75, -20.85], [47.0, -20.75], [47.25, -20.85], [47.5, -20.75], [48.03, -20.97], [48.25, -21.5], [48.15, -21.75], [48.25, -22.0], [48.15, -22.25], [48.25, -22.5], [48.03, -23.03], [47.68, -23.18], [47.65, -23.25], [47.75, -23.5], [47.65, -23.75], [47.75, -24.0], [47.65, -24.25], [47.75, -24.5], [47.53, -25.03], [47.0, 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"Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.747787456073866, 14.000846703605816, 15.002494268665544, 15.102250577642224]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.746188338763773, 11.269297184371567, 12.223144388413516, 12.617547367187797]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.250352038640153, -3.529278087237183, -2.5558399335687816, -1.8971491719347]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.388645109745312, -4.802349349200767, -3.775638837196027, -2.2941027901819098]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.926076241921998, 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