{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:10.332396", "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-Nov-19_to_2021-Nov-21_31.0_-25.5"}, "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": 2021110000587}, "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": "November 19 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 21 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 50524.213579093484}, "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": ["Eswatini", "Mozambique", "South Africa"]}, "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": -25.5}, "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": 31.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 29.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 32.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.47, -23.97], [29.82, -23.82], [29.85, -23.75], [29.75, -23.5], [29.97, -22.97], [30.5, -22.75], [30.75, -22.85], [31.0, -22.75], [31.53, -22.97], [31.68, -23.32], [32.03, -23.47], [32.25, -24.0], [32.15, -24.25], [32.18, -24.32], [32.53, -24.47], [32.75, -25.0], [32.65, -25.25], [32.75, -25.5], [32.53, -26.03], [32.18, -26.18], [32.03, -26.53], [31.5, -26.75], [31.25, -26.65], [31.0, -26.75], [30.47, -26.53], [30.25, -26.0], [30.35, -25.75], [30.3, -25.62], [30.0, -25.75], [29.47, -25.53], [29.25, -25.0], [29.35, -24.75], [29.25, -24.5], [29.47, -23.97]]]]}, "2021-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.47, -23.97], [29.82, -23.82], [29.85, -23.75], [29.75, -23.5], [29.97, -22.97], [30.5, -22.75], [30.75, -22.85], [31.0, -22.75], [31.53, -22.97], [31.68, -23.32], [32.03, -23.47], [32.25, -24.0], [32.15, -24.25], [32.18, -24.32], [32.53, -24.47], [32.75, -25.0], [32.65, -25.25], [32.75, -25.5], [32.53, -26.03], [32.18, -26.18], [32.03, -26.53], [31.5, -26.75], [31.25, -26.65], [31.0, -26.75], [30.47, -26.53], [30.25, -26.0], [30.35, -25.75], [30.3, -25.62], [30.0, -25.75], [29.47, -25.53], [29.25, -25.0], [29.35, -24.75], [29.25, -24.5], [29.47, -23.97]]]]}, "2021-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.47, -23.97], [29.82, -23.82], [29.85, -23.75], [29.75, -23.5], [29.97, -22.97], [30.5, -22.75], [30.75, -22.85], [31.0, -22.75], [31.53, -22.97], [31.68, -23.32], [32.03, -23.47], [32.25, -24.0], [32.15, -24.25], [32.18, -24.32], [32.53, -24.47], [32.75, -25.0], [32.65, -25.25], [32.75, -25.5], [32.53, -26.03], [32.18, -26.18], [32.03, -26.53], [31.5, -26.75], [31.25, -26.65], [31.0, -26.75], [30.47, -26.53], [30.25, -26.0], [30.35, -25.75], [30.3, -25.62], [30.0, -25.75], [29.47, -25.53], [29.25, -25.0], [29.35, -24.75], [29.25, -24.5], [29.47, -23.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.462354330352639}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.6551654270273515}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.146262171118167, 18.246119698024245, 18.29842893039074]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.320760594676756, 14.267790220755387, 15.063510013618497]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.804565035386645, -4.662720231629446, -4.498211014065965]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.462354330352639, -5.161528504443311, -5.353108859285612]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6499653177228468, -1.6024185615301003, -1.5163125602184708]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9199912574565077, -1.8824186386330957, -1.6410237320361505]}}