{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:31.643202", "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": "2011-Jan-13_to_2011-Jan-18_23.5_-22.5"}, "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": 2011010000697}, "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": "January 13 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 18 2011"}, "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": 65511.78430494639}, "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": ["Botswana"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "W.Southern-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": -22.5}, "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": 23.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.75}, "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": {"2011-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[25.5, -22.25], [26.03, -22.47], [26.25, -23.0], [26.03, -23.53], [25.5, -23.75], [24.97, -23.53], [24.75, -23.0], [24.97, -22.47], [25.5, -22.25]]]]}, "2011-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.47, -21.47], [23.0, -21.25], [23.25, -21.35], [23.32, -21.32], [23.47, -20.97], [24.0, -20.75], [24.53, -20.97], [24.68, -21.32], [25.03, -21.47], [25.25, -22.0], [25.15, -22.25], [25.18, -22.32], [25.25, -22.35], [25.5, -22.25], [26.03, -22.47], [26.25, -23.0], [26.03, -23.53], [25.5, -23.75], [25.25, -23.65], [25.0, -23.75], [24.75, -23.65], [24.5, -23.75], [24.25, -23.65], [24.0, -23.75], [23.75, -23.65], [23.5, -23.75], [22.97, -23.53], [22.82, -23.18], [22.47, -23.03], [22.25, -22.5], [22.35, -22.25], [22.25, -22.0], [22.47, -21.47]]]]}, "2011-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -21.97], [22.32, -21.82], [22.47, -21.47], [23.0, -21.25], [23.25, -21.35], [23.32, -21.32], [23.47, -20.97], [24.0, -20.75], [24.53, -20.97], [24.68, -21.32], [25.03, -21.47], [25.25, -22.0], [25.15, -22.25], [25.18, -22.32], [25.25, -22.35], [25.5, -22.25], [26.03, -22.47], [26.25, -23.0], [26.03, -23.53], [25.5, -23.75], [25.25, -23.65], [25.0, -23.75], [24.75, -23.65], [24.68, -23.68], [24.53, -24.03], [24.0, -24.25], [23.47, -24.03], [23.32, -23.68], [23.25, -23.65], [23.0, -23.75], [22.75, -23.65], [22.5, -23.75], [21.97, -23.53], [21.75, -23.0], [21.85, -22.75], [21.75, -22.5], [21.97, -21.97]]]]}, "2011-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -22.75], [21.75, -22.5], [21.97, -21.97], [22.32, -21.82], [22.47, -21.47], [23.0, -21.25], [23.25, -21.35], [23.32, -21.32], [23.47, -20.97], [24.0, -20.75], [24.53, -20.97], [24.68, -21.32], [25.03, -21.47], [25.25, -22.0], [25.15, -22.25], [25.18, -22.32], [25.25, -22.35], [25.5, -22.25], [26.03, -22.47], [26.25, -23.0], [26.03, -23.53], [25.5, -23.75], [25.25, -23.65], [25.0, -23.75], [24.75, -23.65], [24.68, -23.68], [24.54, -24.0], [24.75, -24.5], [24.53, -25.03], [24.0, -25.25], [23.47, -25.03], [23.32, -24.68], [22.97, -24.53], [22.82, -24.18], [22.75, -24.15], [22.5, -24.25], [21.97, -24.03], [21.75, -23.5], [21.85, -23.25], [21.75, -23.0], [21.85, -22.75]]]]}, "2011-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -22.75], [21.75, -22.5], [21.97, -21.97], [22.32, -21.82], [22.47, -21.47], [23.0, -21.25], [23.25, -21.35], [23.5, -21.25], [23.75, -21.35], [24.0, -21.25], [24.53, -21.47], [24.68, -21.82], [25.03, -21.97], [25.25, -22.5], [25.03, -23.03], [24.68, -23.18], [24.65, -23.25], [24.75, -23.5], [24.54, -24.0], [24.75, -24.5], [24.53, -25.03], [24.0, -25.25], [23.47, -25.03], [23.32, -24.68], [22.97, -24.53], [22.82, -24.18], [22.75, -24.15], [22.5, -24.25], [21.97, -24.03], [21.75, -23.5], [21.85, -23.25], [21.75, -23.0], [21.85, -22.75]]]]}, "2011-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -24.03], [21.75, -23.5], [21.97, -22.97], [22.5, -22.75], [22.75, -22.85], [23.0, -22.75], [23.25, 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21.482582880348218, 21.956605372384388]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.636989391361965, -3.6950408132215835, -3.7027385594804514, -3.885090567578444, -4.00806160879572, -3.9769091491043356]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.636989391361965, -4.215237575022115, -4.309504827850844, -4.720741738648314, -4.806476215017767, -4.133878306077293]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1083617145123956, -1.5191389095399146, -1.4732133168026336, -1.4880044038941045, -1.4887500255958424, -1.5226345069106504]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.1083617145123956, -1.782249191858047, -1.6617368513399582, -1.8814730758761917, -1.7973304299943995, -1.658792134228499]}}