{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:37.002826", "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": "2026-Feb-23_to_2026-Feb-25_20.0_-27.5"}, "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": 2026020000536}, "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 23 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 2026"}, "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": 146670.6613286213}, "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": -27.5}, "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": 20.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 22.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -28.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -24.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.47, -26.47], [17.82, -26.32], [17.97, -25.97], [18.32, -25.82], [18.35, -25.75], [18.25, -25.5], [18.47, -24.97], [18.82, -24.82], [18.97, -24.47], [19.5, -24.25], [19.75, -24.35], [19.82, -24.32], [19.97, -23.97], [20.5, -23.75], [20.75, -23.85], [21.0, -23.75], [21.53, -23.97], [21.68, -24.32], [21.75, -24.35], [22.0, -24.25], [22.25, -24.35], [22.5, -24.25], [23.03, -24.47], [23.25, -25.0], [23.15, -25.25], [23.25, -25.5], [23.15, -25.75], [23.25, -26.0], [23.03, -26.53], [22.68, -26.68], [22.53, -27.03], [22.18, -27.18], [22.04, -27.5], [22.25, -28.0], [22.15, -28.25], [22.25, -28.5], [22.03, -29.03], [21.5, -29.25], [21.0, -29.04], [20.5, -29.25], [20.25, -29.15], [20.0, -29.25], [19.75, -29.15], [19.5, -29.25], [18.97, -29.03], [18.75, -28.5], [18.85, -28.25], [18.75, -28.0], [18.93, -27.57], [18.68, -27.68], [18.53, -28.03], [18.0, -28.25], [17.47, -28.03], [17.25, -27.5], [17.35, -27.25], [17.25, -27.0], [17.47, -26.47]]]]}, "2026-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.47, -26.47], [17.82, -26.32], [17.97, -25.97], [18.32, -25.82], [18.35, -25.75], [18.25, -25.5], [18.47, -24.97], [18.82, -24.82], [18.97, -24.47], [19.5, -24.25], [19.75, -24.35], [19.82, -24.32], [19.97, -23.97], [20.5, -23.75], [20.75, -23.85], [21.0, -23.75], [21.53, -23.97], [21.68, -24.32], [21.75, -24.35], [22.0, -24.25], [22.25, -24.35], [22.5, -24.25], [23.03, -24.47], [23.25, -25.0], [23.15, -25.25], [23.25, -25.5], [23.15, -25.75], [23.25, -26.0], [23.03, -26.53], [22.68, -26.68], [22.53, -27.03], [22.18, -27.18], [22.04, -27.5], [22.25, -28.0], [22.15, -28.25], [22.25, -28.5], [22.03, -29.03], [21.5, -29.25], [21.0, -29.04], [20.5, -29.25], [20.25, -29.15], [20.0, -29.25], [19.75, -29.15], [19.5, -29.25], [18.97, -29.03], [18.75, -28.5], [18.85, -28.25], [18.75, -28.0], [18.93, -27.57], [18.68, -27.68], [18.53, -28.03], [18.0, -28.25], [17.47, -28.03], [17.25, -27.5], [17.35, -27.25], [17.25, -27.0], [17.47, -26.47]]]]}, "2026-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.47, -26.47], [17.82, -26.32], [17.97, -25.97], [18.32, -25.82], [18.35, -25.75], [18.25, -25.5], [18.47, -24.97], [18.82, -24.82], [18.97, -24.47], [19.5, -24.25], [19.75, -24.35], [19.82, -24.32], [19.97, -23.97], [20.5, -23.75], [20.75, -23.85], [21.0, -23.75], [21.53, -23.97], [21.68, -24.32], [21.75, -24.35], [22.0, -24.25], [22.25, -24.35], [22.5, -24.25], [23.03, -24.47], [23.25, -25.0], [23.15, -25.25], [23.25, -25.5], [23.15, -25.75], [23.25, -26.0], [23.03, -26.53], [22.68, -26.68], [22.53, -27.03], [22.18, -27.18], [22.04, -27.5], [22.25, -28.0], [22.15, -28.25], [22.25, -28.5], [22.03, -29.03], [21.5, -29.25], [21.0, -29.04], [20.5, -29.25], [20.25, -29.15], [20.0, -29.25], [19.75, -29.15], [19.5, -29.25], [18.97, -29.03], [18.75, -28.5], [18.85, -28.25], [18.75, -28.0], [18.93, -27.57], [18.68, -27.68], [18.53, -28.03], [18.0, -28.25], [17.47, -28.03], [17.25, -27.5], [17.35, -27.25], [17.25, -27.0], [17.47, -26.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.022307002731964}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.693427182070795}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.48414939544483, 21.749141635534897, 23.515055520879457]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.295677439371786, 18.80888392130538, 21.55018259684249]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.8352120743176545, -5.53405781218567, -3.711011659709057]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.197818266225511, -7.022307002731964, -4.39645733481683]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.995730942091546, -2.233441122255693, -1.4674968078431485]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.526159563356573, -2.827746058246271, -1.7201513428406114]}}