{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:59:09.006551", "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": "2024-Jun-02_to_2024-Jun-04_17.5_-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": 2024060000134}, "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": "June 02 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 04 2024"}, "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": 53570.47628929337}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": -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": 17.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "17.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 17.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[16.97, -22.97], [17.5, -22.75], [18.0, -22.96], [18.32, -22.82], [18.47, -22.47], [19.0, -22.25], [19.25, -22.35], [19.5, -22.25], [20.03, -22.47], [20.18, -22.82], [20.53, -22.97], [20.75, -23.5], [20.65, -23.75], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.65, -24.75], [20.75, -25.0], [20.53, -25.53], [20.18, -25.68], [20.15, -25.75], [20.25, -26.0], [20.03, -26.53], [19.5, -26.75], [18.97, -26.53], [18.75, -26.0], [18.85, -25.75], [18.82, -25.68], [18.47, -25.53], [18.25, -25.0], [18.35, -24.75], [18.3, -24.62], [18.0, -24.75], [17.47, -24.53], [17.32, -24.18], [16.97, -24.03], [16.75, -23.5], [16.97, -22.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.97, -24.03], [16.75, -23.5], [16.97, -22.97], [17.5, -22.75], [18.0, -22.96], [18.32, -22.82], [18.47, -22.47], [19.0, -22.25], [19.25, -22.35], [19.5, -22.25], [20.03, -22.47], [20.18, -22.82], [20.53, -22.97], [20.75, -23.5], [20.65, -23.75], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.65, -24.75], [20.75, -25.0], [20.53, -25.53], [20.18, -25.68], [20.15, -25.75], [20.25, -26.0], [20.03, -26.53], [19.5, -26.75], [18.97, -26.53], [18.75, -26.0], [18.85, -25.75], [18.82, -25.68], [18.47, -25.53], [18.25, -25.0], [18.35, -24.75], [18.3, -24.62], [18.0, -24.75], [17.47, -24.53], [17.32, -24.18], [16.97, -24.03]]]]}, "2024-06-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.97, -24.03], [16.75, -23.5], [16.97, -22.97], [17.5, -22.75], [18.0, -22.96], [18.32, -22.82], [18.47, -22.47], [19.0, -22.25], [19.25, -22.35], [19.5, -22.25], [20.03, -22.47], [20.18, -22.82], [20.53, -22.97], [20.75, -23.5], [20.65, -23.75], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.65, -24.75], [20.75, -25.0], [20.53, -25.53], [20.18, -25.68], [20.15, -25.75], [20.25, -26.0], [20.03, -26.53], [19.5, -26.75], [18.97, -26.53], [18.75, -26.0], [18.85, -25.75], [18.82, -25.68], [18.47, -25.53], [18.25, -25.0], [18.35, -24.75], [18.3, -24.62], [18.0, -24.75], [17.47, -24.53], [17.32, -24.18], [16.97, -24.03]]]]}, "2024-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.97, -24.03], [16.75, -23.5], [16.97, -22.97], [17.5, -22.75], [18.0, -22.96], [18.32, -22.82], [18.47, -22.47], [19.0, -22.25], [19.25, -22.35], [19.5, -22.25], [20.03, -22.47], [20.18, -22.82], [20.53, -22.97], [20.75, -23.5], [20.65, -23.75], [20.75, -24.0], [20.65, -24.25], [20.75, -24.5], [20.65, -24.75], [20.75, -25.0], [20.53, -25.53], [20.18, -25.68], [20.15, -25.75], [20.25, -26.0], [20.03, -26.53], [19.5, -26.75], [18.97, -26.53], [18.75, -26.0], [18.85, -25.75], [18.82, -25.68], [18.47, -25.53], [18.25, -25.0], [18.35, -24.75], [18.3, -24.62], [18.0, -24.75], [17.47, -24.53], [17.32, -24.18], [16.97, -24.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.22581145324699}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.01382920071644}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.8301382022741, 7.209135737881297, 9.97124447712099]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.63644684585546, 5.950779967940832, 8.867480693197365]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.426727563312762, -7.815873772194954, -4.798886266641605]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.098875844004624, -9.22581145324699, -5.5445384758542104]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9742400569323308, -2.778851783134496, -1.6289921667722016]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.138155732590458, -3.470062346324735, -1.8461483399325216]}}