{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:44.346084", "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-Jun-01_to_2022-Jun-04_31.5_-24.5"}, "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": 2022060000043}, "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 01 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 04 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 89832.29635405177}, "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": ["Eswatini", "Mozambique", "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": -24.5}, "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": 31.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "31.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 29.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 32.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[29.35, -23.25], [29.25, -23.0], [29.47, -22.47], [29.82, -22.32], [29.97, -21.97], [30.5, -21.75], [30.75, -21.85], [31.0, -21.75], [31.53, -21.97], [31.68, -22.32], [32.03, -22.47], [32.25, -23.0], [32.15, -23.25], [32.18, -23.32], [32.53, -23.47], [32.75, -24.0], [32.65, -24.25], [32.75, -24.5], [32.53, -25.03], [32.18, -25.18], [32.15, -25.25], [32.18, -25.32], [32.53, -25.47], [32.68, -25.82], [33.03, -25.97], [33.25, -26.5], [33.03, -27.03], [32.68, -27.18], [32.65, -27.25], [32.75, -27.5], [32.53, -28.03], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [30.97, -28.03], [30.75, -27.5], [30.85, -27.25], [30.75, -27.0], [30.85, -26.75], [30.75, -26.5], [30.85, -26.25], [30.82, -26.18], [30.47, -26.03], [30.25, -25.5], [30.35, -25.25], [30.25, -25.0], [30.35, -24.75], [30.32, -24.68], [30.2, -24.62], [30.03, -25.03], [29.5, -25.25], [28.97, -25.03], [28.75, -24.5], [28.85, -24.25], [28.75, -24.0], [28.97, -23.47], [29.32, -23.32], [29.35, -23.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, -24.0], [28.97, -23.47], [29.32, -23.32], [29.35, -23.25], [29.25, -23.0], [29.47, -22.47], [29.82, -22.32], [29.97, -21.97], [30.5, -21.75], [30.75, -21.85], [31.0, -21.75], [31.53, -21.97], [31.68, -22.32], [32.03, -22.47], [32.25, -23.0], [32.15, -23.25], [32.18, -23.32], [32.53, -23.47], [32.75, -24.0], [32.65, -24.25], [32.75, -24.5], [32.53, -25.03], [32.18, -25.18], [32.15, -25.25], [32.18, -25.32], [32.53, -25.47], [32.68, -25.82], [33.03, -25.97], [33.25, -26.5], [33.03, -27.03], [32.68, -27.18], [32.65, -27.25], [32.75, -27.5], [32.53, -28.03], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [30.97, -28.03], [30.75, -27.5], [30.85, -27.25], [30.75, -27.0], [30.85, -26.75], [30.75, -26.5], [30.85, -26.25], [30.82, -26.18], [30.47, -26.03], [30.25, -25.5], [30.35, -25.25], [30.25, -25.0], [30.35, -24.75], [30.32, -24.68], [30.2, -24.62], [30.03, -25.03], [29.5, -25.25], [28.97, -25.03], [28.75, -24.5], [28.85, -24.25], [28.75, -24.0]]]]}, "2022-06-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, -24.0], [28.97, -23.47], [29.32, -23.32], [29.35, -23.25], [29.25, -23.0], [29.47, -22.47], [29.82, -22.32], [29.97, -21.97], [30.5, -21.75], [30.75, -21.85], [31.0, -21.75], [31.53, -21.97], [31.68, -22.32], [32.03, -22.47], [32.25, -23.0], [32.15, -23.25], [32.18, -23.32], [32.53, -23.47], [32.75, -24.0], [32.65, -24.25], [32.75, -24.5], [32.53, -25.03], [32.18, -25.18], [32.15, -25.25], [32.18, -25.32], [32.53, -25.47], [32.68, -25.82], [33.03, -25.97], [33.25, -26.5], [33.03, -27.03], [32.68, -27.18], [32.65, -27.25], [32.75, -27.5], [32.53, -28.03], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [30.97, -28.03], [30.75, -27.5], [30.85, -27.25], [30.75, -27.0], [30.85, -26.75], [30.75, -26.5], [30.85, -26.25], [30.82, -26.18], [30.47, -26.03], [30.25, -25.5], [30.35, -25.25], [30.25, -25.0], [30.35, -24.75], [30.32, -24.68], [30.2, -24.62], [30.03, -25.03], [29.5, -25.25], [28.97, -25.03], [28.75, -24.5], [28.85, -24.25], [28.75, -24.0]]]]}, "2022-06-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[28.75, -24.0], [28.97, -23.47], [29.32, -23.32], [29.35, -23.25], [29.25, -23.0], [29.47, -22.47], [29.82, -22.32], [29.97, -21.97], [30.5, -21.75], [30.75, -21.85], [31.0, -21.75], [31.53, -21.97], [31.68, -22.32], [32.03, -22.47], [32.25, -23.0], [32.15, -23.25], [32.18, -23.32], [32.53, -23.47], [32.75, -24.0], [32.65, -24.25], [32.75, -24.5], [32.53, -25.03], [32.18, -25.18], [32.15, -25.25], [32.18, -25.32], [32.53, -25.47], [32.68, -25.82], [33.03, -25.97], [33.25, -26.5], [33.03, -27.03], [32.68, -27.18], [32.65, -27.25], [32.75, -27.5], [32.53, -28.03], [32.0, -28.25], [31.75, -28.15], [31.5, -28.25], [30.97, -28.03], [30.75, -27.5], [30.85, -27.25], [30.75, -27.0], [30.85, -26.75], [30.75, -26.5], [30.85, -26.25], [30.82, -26.18], [30.47, -26.03], [30.25, -25.5], [30.35, -25.25], [30.25, -25.0], [30.35, -24.75], [30.32, -24.68], [30.2, -24.62], [30.03, -25.03], [29.5, -25.25], [28.97, -25.03], [28.75, -24.5], [28.85, -24.25], [28.75, -24.0]]]]}, "2022-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[30.75, -24.5], [30.97, -23.97], [31.5, -23.75], [32.03, -23.97], [32.25, -24.5], [32.15, -24.75], [32.25, -25.0], [32.03, -25.53], [31.5, -25.75], [30.97, -25.53], [30.75, -25.0], [30.85, -24.75], [30.75, -24.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.672968057007381}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.551120275389108}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.600784244006661, 13.636635560436673, 14.25014776506589, 15.543971917191698]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.085034223787659, 10.148852248872458, 10.406152794996501, 15.261861918773093]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.83597053665285, -3.804954302148598, -3.0572312423439705, -2.8343961957396004]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.421173125104019, -4.672968057007381, -3.5795618299409284, -2.8344988888662783]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9070390385373648, -1.892092848936759, -1.5270852754021853, -1.3039404441354114]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.320869042333776, -2.315269615125291, -1.8633235242736939, -1.3052701133174869]}}