{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:14.371809", "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": "2023-May-19_to_2023-May-21_24.0_-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": 2023050000572}, "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": "May 19 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 2023"}, "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": 52877.6014114469}, "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", "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": -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": 24.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "24.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.0}, "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": [[[[21.97, -25.97], [22.32, -25.82], [22.35, -25.75], [22.25, -25.5], [22.47, -24.97], [22.82, -24.82], [22.97, -24.47], [23.32, -24.32], [23.47, -23.97], [24.0, -23.75], [24.53, -23.97], [24.68, -24.32], [25.03, -24.47], [25.18, -24.82], [25.53, -24.97], [25.75, -25.5], [25.65, -25.75], [25.75, -26.0], [25.53, -26.53], [25.0, -26.75], [24.75, -26.65], [24.68, -26.68], [24.53, -27.03], [24.0, -27.25], [23.75, -27.15], [23.68, -27.18], [23.53, -27.53], [23.0, -27.75], [22.47, -27.53], [22.32, -27.18], [21.97, -27.03], [21.75, -26.5], [21.97, -25.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa", "E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -27.03], [21.75, -26.5], [21.97, -25.97], [22.32, -25.82], [22.35, -25.75], [22.25, -25.5], [22.47, -24.97], [22.82, -24.82], [22.97, -24.47], [23.32, -24.32], [23.47, -23.97], [24.0, -23.75], [24.53, -23.97], [24.68, -24.32], [25.03, -24.47], [25.18, -24.82], [25.53, -24.97], [25.75, -25.5], [25.65, -25.75], [25.75, -26.0], [25.53, -26.53], [25.0, -26.75], [24.75, -26.65], [24.68, -26.68], [24.53, -27.03], [24.0, -27.25], [23.75, -27.15], [23.68, -27.18], [23.53, -27.53], [23.0, -27.75], [22.47, -27.53], [22.32, -27.18], [21.97, -27.03]]]]}, "2023-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -27.03], [21.75, -26.5], [21.97, -25.97], [22.32, -25.82], [22.35, -25.75], [22.25, -25.5], [22.47, -24.97], [22.82, -24.82], [22.97, -24.47], [23.32, -24.32], [23.47, -23.97], [24.0, -23.75], [24.53, -23.97], [24.68, -24.32], [25.03, -24.47], [25.18, -24.82], [25.53, -24.97], [25.75, -25.5], [25.65, -25.75], [25.75, -26.0], [25.53, -26.53], [25.0, -26.75], [24.75, -26.65], [24.68, -26.68], [24.53, -27.03], [24.0, -27.25], [23.75, -27.15], [23.68, -27.18], [23.53, -27.53], [23.0, -27.75], [22.47, -27.53], [22.32, -27.18], [21.97, -27.03]]]]}, "2023-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -27.03], [21.75, -26.5], [21.97, -25.97], [22.32, -25.82], [22.35, -25.75], [22.25, -25.5], [22.47, -24.97], [22.82, -24.82], [22.97, -24.47], [23.32, -24.32], [23.47, -23.97], [24.0, -23.75], [24.53, -23.97], [24.68, -24.32], [25.03, -24.47], [25.18, -24.82], [25.53, -24.97], [25.75, -25.5], [25.65, -25.75], [25.75, -26.0], [25.53, -26.53], [25.0, -26.75], [24.75, -26.65], [24.68, -26.68], [24.53, -27.03], [24.0, -27.25], [23.75, -27.15], [23.68, -27.18], [23.53, -27.53], [23.0, -27.75], [22.47, -27.53], [22.32, -27.18], [21.97, -27.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.9445087811434405}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8503368246137466}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.754058389563227, 11.39323171399377, 11.874203978751268]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.06647221342871, 10.407295398258952, 10.9428174521899]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9357565988660723, -4.1266824751687485, -3.4885713998064185]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.727098420739196, -4.9445087811434405, -4.160150124773338]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7818623304550014, -1.7448599049590339, -1.3990640978945494]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0075128581050343, -2.067521198603029, -1.6195269520754156]}}