{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:18:30.183928", "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": "2022-Mar-01_to_2022-Mar-05_16.0_-26.5"}, "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": 2022030000048}, "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": "March 01 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 05 2022"}, "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": 52315.180427042054}, "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": ["Namibia", "South Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": -26.5}, "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": 16.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -24.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[17.32, -28.18], [17.25, -28.15], [17.0, -28.25], [16.75, -28.15], [16.5, -28.25], [15.97, -28.03], [15.82, -27.68], [15.47, 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the boundary of the event at each time step", "value": {"2022-03-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.35, -28.75], [17.25, -28.5], [17.35, -28.25], [17.25, -28.0], [17.47, -27.47], [18.0, -27.25], [18.53, -27.47], [18.75, -28.0], [18.65, -28.25], [18.75, -28.5], [18.65, -28.75], [18.75, -29.0], [18.65, -29.25], [18.75, -29.5], [18.53, -30.03], [18.0, -30.25], [17.47, -30.03], [17.25, -29.5], [17.35, -29.25], [17.25, -29.0], [17.35, -28.75]]], [[[15.47, -25.97], [16.0, -25.75], [16.53, -25.97], [16.68, -26.32], [17.03, -26.47], [17.25, -27.0], [17.15, -27.25], [17.25, -27.5], [17.03, -28.03], [16.5, -28.25], [15.97, -28.03], [15.82, -27.68], [15.47, -27.53], [15.25, -27.0], [15.35, -26.75], [15.25, -26.5], [15.47, -25.97]]]]}, "2022-03-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -26.5], [15.35, -26.25], [15.25, -26.0], [15.35, -25.75], [15.25, -25.5], [15.47, -24.97], [16.0, -24.75], [16.53, -24.97], [16.75, -25.5], 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"max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.721989783141794}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.484731822626845}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.16103443120892, 20.506965779647203, 20.19838060055895, 19.49784511637705, 22.13572293935067]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.963649090477418, 18.1821134840568, 17.67746567273383, 16.86413197626274, 21.922531459371555]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.238643258948429, -4.0540995430271884, -4.468115331337748, -5.180655679862821, -3.4727280801346296]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.909405378996837, -4.810150824949062, -5.630636299695652, -5.721989783141794, -3.685569743918677]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3946942907691222, -1.4138263692371427, -1.6395128711361884, -1.9040325502269304, -1.545566418377112]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4828972758084655, -1.6563894684546236, -2.2693435112523157, -2.3402365462621284, -1.6234241192792032]}}