{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:06.107240", "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-Dec-16_to_2011-Dec-21_33.5_-23.5"}, "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": 2011120000871}, "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": "December 16 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 21 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": 71529.52325925445}, "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": ["Mozambique", "South Africa", "Zimbabwe"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.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": -23.5}, "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": 33.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "33.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 30.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 34.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.46, -21.5], [30.25, -21.0], [30.47, -20.47], [31.0, -20.25], 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[32.32, -23.18], [32.0, -23.04], [31.5, -23.25], [31.25, -23.15], [31.0, -23.25], [30.47, -23.03], [30.25, -22.5], [30.35, -22.25], [30.25, -22.0], [30.46, -21.5]]]]}, "2011-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.85, -21.75], [31.75, -21.5], [31.97, -20.97], [32.5, -20.75], [33.03, -20.97], [33.18, -21.32], [33.53, -21.47], [33.68, -21.82], [34.03, -21.97], [34.18, -22.32], [34.53, -22.47], [34.75, -23.0], [34.65, -23.25], [34.75, -23.5], [34.53, -24.03], [34.18, -24.18], [34.03, -24.53], [33.5, -24.75], [32.97, -24.53], [32.82, -24.18], [32.47, -24.03], [32.25, -23.5], [32.35, -23.25], [32.32, -23.18], [31.97, -23.03], [31.75, -22.5], [31.85, -22.25], [31.75, -22.0], [31.85, -21.75]]]]}, "2011-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[32.35, -22.75], [32.25, -22.5], [32.35, -22.25], [32.25, -22.0], [32.47, -21.47], [33.0, -21.25], [33.53, -21.47], [33.68, -21.82], [34.03, -21.97], [34.18, -22.32], [34.53, -22.47], [34.75, 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23.1514186518977, 24.149989231808547, 24.655238255427548, 24.864804793125074]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.12348468637657, 21.97780810056605, 22.07705417855982, 23.846896300881156, 24.21410678945813, 24.77231392603443]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9327507859649584, -3.530483778973064, -4.087816980302596, -3.68524858181681, -3.3626810558967577, -3.1357352856876637]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.6031538489827994, -4.194554068331001, -4.5536636699300175, -4.07296776387625, -3.620093918318048, -3.2335386529059065]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5599881562348659, -1.3640890825150958, -1.5837563720707502, -1.5292364923314024, -1.434527730224654, -1.3481116728859526]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9345455719975229, -1.4659845831711262, -1.7940107452771987, -1.7059364867040274, -1.573720828802685, -1.378113117259382]}}