{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:40.609040", "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": "2025-Jun-08_to_2025-Jun-15_20.0_-20.5"}, "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": 2025060000301}, "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 08 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 15 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 614289.9950316895}, "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": ["Angola", "Botswana", "Namibia", "South Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": -20.5}, "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": 16.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[26.68, -23.82], [27.0, -23.96], [27.5, -23.75], [27.75, -23.85], [28.0, -23.75], [28.53, -23.97], [28.75, -24.5], [28.53, -25.03], [28.18, -25.18], [28.03, -25.53], [27.5, -25.75], [27.25, -25.65], [27.0, -25.75], [26.75, -25.65], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.7, -25.62], [25.53, -26.03], [25.0, -26.25], [24.75, -26.15], [24.5, -26.25], [24.25, -26.15], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.75, -26.15], [22.5, -26.25], [22.25, -26.15], [22.0, -26.25], [21.47, -26.03], [21.3, -25.62], [21.0, -25.75], [20.47, -25.53], [20.25, -25.0], [20.47, -24.47], [20.82, -24.32], [20.85, -24.25], [20.8, -24.12], [20.5, -24.25], [20.25, -24.15], [20.0, -24.25], [19.75, -24.15], [19.5, -24.25], [18.97, -24.03], [18.82, -23.68], [18.47, -23.53], [18.25, -23.0], [18.35, -22.75], [18.32, -22.68], [18.25, -22.65], [18.18, -22.68], [18.03, -23.03], [17.5, -23.25], [17.25, -23.15], [17.18, -23.18], [17.03, -23.53], [16.5, -23.75], [16.25, -23.65], [16.0, -23.75], [15.47, -23.53], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.3, -20.87], [16.35, -20.75], [16.25, -20.5], [16.46, -20.0], [16.32, -19.68], [15.97, -19.53], [15.75, -19.0], [15.97, -18.47], [16.32, -18.32], [16.47, -17.97], [17.0, -17.75], [17.25, -17.85], [17.5, -17.75], [17.75, -17.85], [17.82, -17.82], [17.97, -17.47], [18.32, -17.32], [18.47, -16.97], [19.0, -16.75], [19.25, -16.85], [19.5, -16.75], [19.75, -16.85], [20.0, -16.75], [20.25, -16.85], [20.5, -16.75], [21.03, -16.97], [21.18, -17.32], [21.25, -17.35], [21.5, -17.25], [21.75, -17.35], [22.0, -17.25], [22.53, -17.47], [22.68, -17.82], [23.03, -17.97], [23.18, -18.32], [23.53, -18.47], [23.75, -19.0], [23.65, -19.25], [23.68, -19.32], [24.03, -19.47], [24.25, -20.0], [24.15, -20.25], [24.18, -20.32], [24.53, -20.47], [24.68, -20.82], [25.03, -20.97], [25.18, -21.32], [25.53, -21.47], [25.68, -21.82], [26.03, -21.97], [26.18, -22.32], [26.53, -22.47], [26.75, -23.0], [26.65, -23.25], [26.75, -23.5], [26.65, -23.75], [26.68, -23.82]]]]}}, "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": {"2025-06-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.53, -20.97], [16.75, -21.5], [16.65, -21.75], [16.75, -22.0], [16.65, -22.25], [16.68, -22.32], [17.03, -22.47], [17.25, -23.0], [17.03, -23.53], [16.5, -23.75], [16.25, -23.65], [16.0, -23.75], [15.47, -23.53], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5]]]]}, "2025-06-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.3, -20.87], [16.35, -20.75], [16.25, -20.5], [16.46, -20.0], [16.32, -19.68], [15.97, -19.53], [15.75, -19.0], [15.97, -18.47], [16.32, -18.32], [16.47, -17.97], [17.0, -17.75], [17.25, -17.85], [17.5, -17.75], [17.75, -17.85], [17.82, -17.82], [17.97, -17.47], [18.5, -17.25], [18.75, -17.35], [19.0, -17.25], [19.53, -17.47], [19.75, -18.0], [19.65, -18.25], [19.68, -18.32], [20.03, -18.47], [20.18, -18.82], [20.25, -18.85], [20.5, -18.75], [20.75, -18.85], [21.0, -18.75], [21.25, -18.85], [21.32, -18.82], [21.47, -18.47], [22.0, -18.25], [22.53, -18.47], [22.68, -18.82], [23.03, -18.97], [23.18, -19.32], [23.25, -19.35], [23.5, -19.25], [24.03, -19.47], [24.25, -20.0], [24.15, -20.25], [24.18, -20.32], [24.53, -20.47], [24.68, -20.82], [25.03, -20.97], [25.18, -21.32], [25.53, -21.47], [25.68, -21.82], [26.03, -21.97], [26.18, -22.32], [26.53, -22.47], [26.75, -23.0], [26.65, -23.25], [26.75, -23.5], [26.65, -23.75], [26.68, -23.82], [27.03, -23.97], [27.18, -24.32], [27.53, -24.47], [27.75, -25.0], [27.53, -25.53], [27.0, -25.75], [26.75, -25.65], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.7, -25.62], [25.53, -26.03], [25.0, -26.25], [24.75, -26.15], [24.5, -26.25], [24.25, -26.15], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.75, -26.15], [22.5, -26.25], [22.25, -26.15], [22.0, -26.25], [21.47, -26.03], [21.3, -25.62], [21.0, -25.75], [20.47, -25.53], [20.25, -25.0], [20.47, -24.47], [20.82, -24.32], [20.85, -24.25], [20.8, -24.12], [20.5, -24.25], [20.25, -24.15], [20.0, -24.25], [19.75, -24.15], [19.5, -24.25], [18.97, -24.03], [18.82, -23.68], [18.47, -23.53], [18.25, -23.0], [18.35, -22.75], [18.32, -22.68], [18.25, -22.65], [18.18, -22.68], [18.03, -23.03], [17.5, -23.25], [17.25, -23.15], [17.18, -23.18], [17.03, -23.53], [16.5, -23.75], [16.25, -23.65], [16.0, -23.75], [15.47, -23.53], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5]]]]}, "2025-06-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.25, -22.5], [15.35, -22.25], [15.25, -22.0], [15.35, -21.75], [15.25, -21.5], [15.47, -20.97], [16.0, -20.75], [16.3, -20.87], [16.35, -20.75], [16.25, -20.5], [16.46, -20.0], [16.32, -19.68], [15.97, -19.53], [15.75, -19.0], [15.97, -18.47], [16.32, -18.32], [16.47, -17.97], [17.0, -17.75], [17.25, -17.85], [17.5, -17.75], [17.75, -17.85], [17.82, -17.82], [17.97, -17.47], [18.32, -17.32], [18.47, -16.97], [19.0, -16.75], [19.25, -16.85], [19.5, -16.75], [19.75, -16.85], [20.0, -16.75], [20.25, -16.85], [20.5, -16.75], [21.03, -16.97], [21.18, -17.32], [21.25, -17.35], [21.5, -17.25], [21.75, -17.35], [22.0, -17.25], [22.53, -17.47], [22.68, -17.82], [23.03, -17.97], [23.18, -18.32], [23.53, -18.47], [23.75, -19.0], [23.65, -19.25], [23.68, -19.32], [24.03, -19.47], [24.25, -20.0], [24.15, -20.25], [24.18, -20.32], [24.53, -20.47], [24.68, -20.82], [25.03, -20.97], [25.18, -21.32], [25.53, -21.47], [25.68, -21.82], [26.03, -21.97], [26.18, -22.32], [26.53, -22.47], [26.75, -23.0], [26.65, -23.25], [26.75, -23.5], [26.65, -23.75], [26.68, -23.82], [27.0, -23.96], [27.5, -23.75], [27.75, -23.85], [28.0, -23.75], [28.53, -23.97], [28.75, -24.5], [28.53, -25.03], [28.18, -25.18], [28.03, -25.53], [27.5, -25.75], [27.25, -25.65], [27.0, -25.75], [26.75, -25.65], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.7, -25.62], [25.53, -26.03], [25.0, -26.25], [24.75, -26.15], [24.5, -26.25], [24.25, -26.15], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.75, -26.15], [22.5, -26.25], [22.25, -26.15], [22.0, -26.25], [21.47, -26.03], [21.3, -25.62], [21.0, -25.75], [20.47, -25.53], [20.25, -25.0], [20.47, -24.47], [20.82, -24.32], [20.85, -24.25], [20.8, -24.12], [20.5, -24.25], [20.25, -24.15], [20.0, -24.25], [19.75, -24.15], [19.5, -24.25], [18.97, -24.03], [18.82, -23.68], [18.47, -23.53], [18.25, -23.0], [18.35, -22.75], [18.32, -22.68], [18.25, -22.65], [18.18, -22.68], [18.03, -23.03], [17.5, -23.25], [17.25, -23.15], [17.18, -23.18], [17.03, -23.53], [16.5, -23.75], [16.25, -23.65], [16.0, -23.75], [15.47, -23.53], [15.25, -23.0], [15.35, -22.75], [15.25, -22.5]]]]}, "2025-06-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.97, -19.53], [15.75, -19.0], [15.97, -18.47], [16.32, -18.32], [16.47, -17.97], [17.0, -17.75], [17.25, -17.85], [17.5, -17.75], [17.75, -17.85], [17.82, -17.82], [17.97, -17.47], [18.32, -17.32], [18.47, -16.97], [19.0, -16.75], [19.25, -16.85], [19.5, -16.75], [19.75, -16.85], [20.0, -16.75], [20.25, -16.85], [20.5, -16.75], [21.03, -16.97], [21.18, -17.32], [21.25, -17.35], [21.5, -17.25], [21.75, -17.35], [22.0, -17.25], [22.53, -17.47], [22.68, -17.82], [23.03, -17.97], [23.18, -18.32], [23.53, -18.47], [23.75, -19.0], [23.65, -19.25], [23.68, -19.32], [24.03, -19.47], [24.25, -20.0], [24.15, -20.25], [24.18, -20.32], [24.53, -20.47], [24.68, -20.82], [25.03, -20.97], [25.18, -21.32], [25.53, -21.47], [25.68, -21.82], [26.03, -21.97], [26.18, -22.32], [26.53, -22.47], [26.75, -23.0], [26.65, -23.25], [26.75, -23.5], [26.65, -23.75], [26.68, -23.82], [27.0, -23.96], [27.5, -23.75], [27.75, -23.85], [28.0, -23.75], [28.53, -23.97], [28.75, -24.5], [28.53, -25.03], [28.18, -25.18], [28.03, -25.53], [27.5, -25.75], [27.25, -25.65], [27.0, -25.75], [26.75, -25.65], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.7, -25.62], [25.53, -26.03], [25.0, -26.25], [24.75, -26.15], [24.5, -26.25], [24.25, -26.15], [24.0, -26.25], [23.75, -26.15], [23.5, -26.25], [23.25, -26.15], [23.0, -26.25], [22.75, -26.15], [22.5, -26.25], [22.25, -26.15], [22.0, -26.25], [21.47, -26.03], [21.3, -25.62], [21.0, -25.75], [20.47, -25.53], [20.25, -25.0], [20.47, -24.47], [20.82, -24.32], [20.85, -24.25], [20.8, -24.12], [20.5, -24.25], [20.25, -24.15], [20.0, -24.25], [19.75, -24.15], [19.5, -24.25], [18.97, -24.03], [18.82, -23.68], [18.47, -23.53], [18.25, -23.0], [18.35, -22.75], [18.32, -22.68], [18.25, -22.65], [18.18, -22.68], [18.03, -23.03], [17.5, -23.25], [17.25, -23.15], [17.0, -23.25], [16.47, -23.03], [16.25, -22.5], [16.35, -22.25], [16.25, -22.0], [16.35, -21.75], [16.25, -21.5], [16.35, -21.25], [16.25, -21.0], [16.35, -20.75], [16.25, -20.5], [16.46, -20.0], [16.32, -19.68], [15.97, -19.53]]]]}, "2025-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.75, -24.5], [24.97, -23.97], [25.32, -23.82], [25.47, -23.47], [26.0, -23.25], [26.53, -23.47], [26.68, -23.82], [27.0, -23.96], [27.5, -23.75], [27.75, -23.85], [28.0, -23.75], [28.53, -23.97], [28.75, -24.5], [28.53, -25.03], [28.18, -25.18], [28.03, -25.53], [27.5, -25.75], [27.0, -25.54], [26.5, -25.75], [26.25, -25.65], [26.0, -25.75], [25.47, -25.53], [25.32, -25.18], [24.97, -25.03], [24.75, -24.5]]], [[[17.47, -19.47], [17.82, -19.32], [17.85, -19.25], [17.75, -19.0], [17.85, -18.75], [17.75, -18.5], [17.85, -18.25], [17.75, -18.0], [17.97, -17.47], [18.32, -17.32], [18.47, -16.97], [19.0, -16.75], [19.25, -16.85], [19.5, -16.75], [19.75, -16.85], [20.0, -16.75], [20.25, -16.85], [20.5, -16.75], [21.03, -16.97], [21.18, -17.32], [21.25, -17.35], [21.5, -17.25], [21.75, -17.35], [22.0, -17.25], [22.53, -17.47], [22.68, -17.82], [23.03, -17.97], [23.18, -18.32], [23.53, -18.47], [23.75, -19.0], [23.65, -19.25], [23.75, -19.5], [23.53, -20.03], [23.18, -20.18], [23.03, -20.53], [22.5, -20.75], [22.25, -20.65], [22.18, -20.68], [22.03, -21.03], [21.5, -21.25], [21.0, -21.04], [20.5, -21.25], [20.25, -21.15], [20.0, -21.25], [19.75, -21.15], [19.5, -21.25], [19.25, -21.15], [19.0, -21.25], [18.75, -21.15], [18.5, -21.25], [18.25, -21.15], [18.0, -21.25], [17.47, -21.03], [17.25, -20.5], [17.35, -20.25], [17.25, -20.0], [17.47, -19.47]]]]}, "2025-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.97, -25.03], [24.75, -24.5], [24.97, -23.97], [25.5, -23.75], [25.75, -23.85], [26.0, -23.75], [26.53, -23.97], [26.75, -24.5], [26.53, -25.03], [26.0, -25.25], [25.75, -25.15], [25.5, -25.25], [24.97, -25.03]]], [[[27.5, -23.75], [27.75, -23.85], [28.0, -23.75], [28.53, -23.97], [28.75, -24.5], [28.53, -25.03], [28.0, -25.25], [27.75, -25.15], [27.5, -25.25], [26.97, -25.03], [26.75, -24.5], [26.97, -23.97], [27.5, -23.75]]]]}, "2025-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.5, -25.25], [26.97, -25.03], [26.75, -24.5], [26.97, -23.97], [27.5, -23.75], [27.75, -23.85], [28.0, -23.75], [28.53, -23.97], [28.75, -24.5], [28.53, -25.03], [28.0, -25.25], [27.75, -25.15], [27.5, -25.25]]]]}, "2025-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, -23.97], [28.0, -23.75], [28.53, -23.97], [28.75, -24.5], [28.53, -25.03], [28.0, -25.25], [27.47, -25.03], [27.25, -24.5], [27.47, -23.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.137524652450622}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.9035552109817315}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.887613169352221, 9.73406914335925, 9.03050434433419, 10.469960407701251, 12.7708397498497, 10.409710184733058, 10.371539052327535, 9.486908213297568]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.253840382893884, 4.60535837809249, 5.622542317708337, 7.817578887939476, 9.591628011067712, 9.277182515462243, 9.766029612223349, 9.486908213297568]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.172274051107024, -5.073039958880524, -5.899357309937379, -4.355566692269101, -3.203350434322372, -2.5794578053819066, -2.4111235804353726, -2.74985825826883]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.71488832422898, -8.137524652450622, -7.731636414465299, -5.980887114872189, -4.519634209202138, -2.954446337950344, -2.451589069009515, -2.74985825826883]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.597307756438679, -2.0271329741095747, -2.4685051071253485, -1.879767869735559, -1.5290603288184978, -1.315565902960675, -1.1965215673475846, -1.3250565856894168]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.752849880754189, -3.1426997006240454, -3.3176262842337, -2.6426335533602865, -2.106034554704774, -1.4601349773214882, -1.2094472568554364, -1.3250565856894168]}}