{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:16.452216", "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-Feb-21_to_2021-Feb-25_21.5_-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": 2021020000812}, "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": "February 21 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 2021"}, "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": 141439.85144077064}, "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", "Namibia", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": -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": 21.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 23.75}, "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": -20.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -21.5], [18.97, -20.97], [19.32, -20.82], [19.47, -20.47], [19.82, -20.32], [19.97, -19.97], [20.5, -19.75], [20.75, -19.85], [21.0, -19.75], [21.53, -19.97], [21.75, -20.5], [21.65, -20.75], [21.75, -21.0], [21.65, -21.25], [21.75, -21.5], [21.65, -21.75], [21.75, -22.0], [21.65, -22.25], [21.75, -22.5], [21.65, -22.75], [21.68, -22.82], [22.03, -22.97], [22.25, -23.5], [22.03, -24.03], [21.5, -24.25], [20.97, -24.03], [20.82, -23.68], [20.47, -23.53], [20.32, -23.18], [19.97, -23.03], [19.82, -22.68], [19.47, -22.53], [19.32, -22.18], [18.97, -22.03], [18.75, -21.5]]]]}, "2021-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -21.5], [18.97, -20.97], [19.32, -20.82], [19.47, -20.47], [19.82, -20.32], [19.97, -19.97], [20.5, -19.75], [20.75, -19.85], [21.0, -19.75], [21.53, -19.97], [21.75, -20.5], [21.65, -20.75], [21.75, -21.0], [21.65, -21.25], [21.75, -21.5], [21.65, -21.75], [21.75, -22.0], [21.65, -22.25], [21.75, -22.5], [21.65, -22.75], [21.68, -22.82], [22.03, -22.97], [22.18, -23.32], [22.53, -23.47], [22.68, -23.82], [23.03, -23.97], [23.18, -24.32], [23.53, -24.47], [23.68, -24.82], [24.03, -24.97], [24.25, -25.5], [24.15, -25.75], [24.25, -26.0], [24.03, -26.53], [23.5, -26.75], [23.25, -26.65], [23.0, -26.75], [22.47, -26.53], [22.32, -26.18], [22.25, -26.15], [22.18, -26.18], [22.03, -26.53], [21.5, -26.75], [20.97, -26.53], [20.82, -26.18], [20.75, -26.15], [20.5, -26.25], [20.25, -26.15], [20.0, -26.25], [19.47, -26.03], [19.25, -25.5], [19.35, -25.25], [19.25, -25.0], [19.35, -24.75], [19.25, -24.5], [19.35, -24.25], [19.25, -24.0], [19.35, -23.75], [19.25, -23.5], [19.35, -23.25], [19.25, -23.0], [19.35, -22.75], [19.25, -22.5], [19.35, -22.25], [19.32, -22.18], [18.97, -22.03], [18.75, -21.5]]]]}, "2021-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, -21.5], [18.97, -20.97], [19.32, -20.82], [19.47, -20.47], [19.82, -20.32], [19.97, -19.97], [20.5, -19.75], [20.75, -19.85], [21.0, -19.75], [21.53, -19.97], [21.75, -20.5], [21.65, -20.75], [21.75, -21.0], [21.65, -21.25], [21.75, -21.5], [21.65, -21.75], [21.75, -22.0], [21.65, -22.25], [21.75, -22.5], [21.65, -22.75], [21.68, -22.82], [22.03, -22.97], [22.18, -23.32], [22.53, -23.47], [22.68, -23.82], [23.03, -23.97], [23.18, -24.32], [23.53, -24.47], [23.68, -24.82], [24.03, -24.97], [24.25, -25.5], [24.15, -25.75], [24.25, -26.0], [24.03, -26.53], [23.5, -26.75], [23.25, -26.65], [23.0, -26.75], [22.47, -26.53], [22.32, -26.18], [22.25, -26.15], [22.18, -26.18], [22.03, -26.53], [21.5, -26.75], [20.97, -26.53], [20.82, -26.18], [20.75, -26.15], [20.5, -26.25], [20.25, -26.15], [20.0, -26.25], [19.47, -26.03], [19.25, -25.5], [19.35, -25.25], [19.25, -25.0], [19.35, -24.75], [19.25, -24.5], [19.35, -24.25], [19.25, -24.0], [19.35, -23.75], [19.25, -23.5], [19.35, -23.25], [19.25, -23.0], [19.35, -22.75], [19.25, -22.5], [19.35, -22.25], [19.32, -22.18], [18.97, -22.03], [18.75, -21.5]]]]}, "2021-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.35, -24.75], [19.25, -24.5], [19.35, -24.25], [19.25, -24.0], [19.35, -23.75], [19.25, -23.5], [19.35, -23.25], [19.25, -23.0], [19.35, -22.75], [19.25, -22.5], [19.47, -21.97], [19.88, -21.8], [19.75, -21.5], [19.97, -20.97], [20.5, -20.75], [21.03, -20.97], [21.18, -21.32], [21.53, -21.47], [21.75, -22.0], [21.65, -22.25], [21.75, -22.5], [21.65, -22.75], [21.68, -22.82], [22.03, -22.97], [22.18, -23.32], [22.53, -23.47], [22.68, -23.82], [23.03, -23.97], [23.18, -24.32], [23.53, -24.47], [23.68, -24.82], [24.03, -24.97], [24.25, -25.5], [24.15, -25.75], [24.25, -26.0], [24.03, -26.53], [23.5, -26.75], [23.25, -26.65], [23.0, -26.75], [22.47, -26.53], [22.32, -26.18], [22.25, -26.15], [22.18, -26.18], [22.03, -26.53], [21.5, -26.75], [20.97, -26.53], [20.82, -26.18], [20.75, -26.15], [20.5, -26.25], [20.25, -26.15], [20.0, -26.25], [19.47, -26.03], [19.25, -25.5], [19.35, -25.25], [19.25, -25.0], [19.35, -24.75]]]]}, "2021-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, -21.97], [19.88, -21.8], [19.75, -21.5], [19.97, -20.97], [20.5, -20.75], [21.03, -20.97], [21.18, -21.32], [21.53, -21.47], [21.75, -22.0], [21.65, -22.25], [21.75, -22.5], [21.65, -22.75], [21.68, -22.82], [22.03, -22.97], [22.25, -23.5], [22.03, -24.03], [21.5, -24.25], [21.25, -24.15], [21.0, -24.25], [20.75, -24.15], [20.5, -24.25], [19.97, -24.03], [19.82, -23.68], [19.47, -23.53], [19.25, -23.0], [19.35, -22.75], [19.25, -22.5], [19.47, -21.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.813973779450521}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.727927245147621}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.149755128229913, 21.872139366761814, 22.12553737363521, 22.477224710186874, 21.565970317381527]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.56307637265479, 19.871378745514903, 20.73248119665965, 21.289172940929404, 20.817814477273657]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.725267278291245, -3.9422208750666936, -3.6721984592909633, -3.5727511303545354, -3.575323777720774]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.323811883967153, -4.813973779450521, -4.662219173415735, -4.367827339975236, -4.042175369782285]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5589581674597697, -1.633683972849682, -1.515054652888347, -1.4472771653025973, -1.3844308653689017]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.826494214204867, -2.0866750787629735, -2.0547803476653232, -1.8545892163409365, -1.5485893170288085]}}