{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:16.027536", "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": "2021-Oct-16_to_2021-Oct-18_24.0_-28.5"}, "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": 2021100000560}, "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": "October 16 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 18 2021"}, "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": 125730.01785283105}, "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": ["South Africa"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": -28.5}, "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": 23.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 26.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[22.25, -30.5], [22.35, -30.25], [22.25, -30.0], [22.35, -29.75], [22.25, -29.5], [22.35, -29.25], [22.25, -29.0], [22.35, -28.75], [22.25, -28.5], [22.47, -27.97], [22.82, -27.82], [22.97, -27.47], [23.5, -27.25], [23.75, -27.35], [24.0, -27.25], [24.5, -27.46], [25.0, -27.25], [25.53, -27.47], [25.68, -27.82], [26.03, -27.97], [26.18, -28.32], [26.53, -28.47], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.53, -30.03], [26.0, -30.25], [25.75, -30.15], [25.68, -30.18], [25.53, -30.53], [25.13, -30.7], [25.2, -30.87], [25.5, -30.75], [26.03, -30.97], [26.18, -31.32], [26.53, -31.47], [26.75, -32.0], [26.53, -32.53], [26.0, -32.75], [25.75, -32.65], [25.68, -32.68], [25.53, -33.03], [25.0, -33.25], [24.47, -33.03], [24.32, -32.68], [24.25, -32.65], [24.0, -32.75], [23.75, -32.65], [23.5, -32.75], [22.97, -32.53], [22.82, -32.18], [22.47, -32.03], [22.25, -31.5], [22.35, -31.25], [22.25, -31.0], [22.35, -30.75], [22.25, -30.5]]]]}}, "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": {"2021-10-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -31.0], [22.35, -30.75], [22.25, -30.5], [22.35, -30.25], [22.25, -30.0], [22.35, -29.75], [22.25, -29.5], [22.35, -29.25], [22.25, -29.0], [22.35, -28.75], [22.25, -28.5], [22.47, -27.97], [22.82, -27.82], [22.97, -27.47], [23.5, -27.25], [23.75, -27.35], [24.0, -27.25], [24.5, -27.46], [25.0, -27.25], [25.53, -27.47], [25.68, -27.82], [26.03, -27.97], [26.18, -28.32], [26.53, -28.47], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.53, -30.03], [26.0, -30.25], [25.75, -30.15], [25.68, -30.18], [25.53, -30.53], [25.13, -30.7], [25.2, -30.87], [25.5, -30.75], [26.03, -30.97], [26.18, -31.32], [26.53, -31.47], [26.75, -32.0], [26.53, -32.53], [26.0, -32.75], [25.75, -32.65], [25.68, -32.68], [25.53, -33.03], [25.0, -33.25], [24.47, -33.03], [24.32, -32.68], [24.25, -32.65], [24.0, -32.75], [23.75, -32.65], [23.5, -32.75], [22.97, -32.53], [22.82, -32.18], [22.47, -32.03], [22.25, -31.5], [22.35, -31.25], [22.25, -31.0]]]]}, "2021-10-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -31.0], [22.35, -30.75], [22.25, -30.5], [22.35, -30.25], [22.25, -30.0], [22.35, -29.75], [22.25, -29.5], [22.35, -29.25], [22.25, -29.0], [22.35, -28.75], [22.25, -28.5], [22.47, -27.97], [22.82, -27.82], [22.97, -27.47], [23.5, -27.25], [23.75, -27.35], [24.0, -27.25], [24.5, -27.46], [25.0, -27.25], [25.53, -27.47], [25.68, -27.82], [26.03, -27.97], [26.18, -28.32], [26.53, -28.47], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.53, -30.03], [26.0, -30.25], [25.75, -30.15], [25.68, -30.18], [25.53, -30.53], [25.13, -30.7], [25.2, -30.87], [25.5, -30.75], [26.03, -30.97], [26.18, -31.32], [26.53, -31.47], [26.75, -32.0], [26.53, -32.53], [26.0, -32.75], [25.75, -32.65], [25.68, -32.68], [25.53, -33.03], [25.0, -33.25], [24.47, -33.03], [24.32, -32.68], [24.25, -32.65], [24.0, -32.75], [23.75, -32.65], [23.5, -32.75], [22.97, -32.53], [22.82, -32.18], [22.47, -32.03], [22.25, -31.5], [22.35, -31.25], [22.25, -31.0]]]]}, "2021-10-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.25, -31.0], [22.35, -30.75], [22.25, -30.5], [22.35, -30.25], [22.25, -30.0], [22.35, -29.75], [22.25, -29.5], [22.35, -29.25], [22.25, -29.0], [22.35, -28.75], [22.25, -28.5], [22.47, -27.97], [22.82, -27.82], [22.97, -27.47], [23.5, -27.25], [23.75, -27.35], [24.0, -27.25], [24.5, -27.46], [25.0, -27.25], [25.53, -27.47], [25.68, -27.82], [26.03, -27.97], [26.18, -28.32], [26.53, -28.47], [26.75, -29.0], [26.65, -29.25], [26.75, -29.5], [26.53, -30.03], [26.0, -30.25], [25.75, -30.15], [25.68, -30.18], [25.53, -30.53], [25.13, -30.7], [25.2, -30.87], [25.5, -30.75], [26.03, -30.97], [26.18, -31.32], [26.53, -31.47], [26.75, -32.0], [26.53, -32.53], [26.0, -32.75], [25.75, -32.65], [25.68, -32.68], [25.53, -33.03], [25.0, -33.25], [24.47, -33.03], [24.32, -32.68], [24.25, -32.65], [24.0, -32.75], [23.75, -32.65], [23.5, -32.75], [22.97, -32.53], [22.82, -32.18], [22.47, -32.03], [22.25, -31.5], [22.35, -31.25], [22.25, -31.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.434745427918472}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.30300226756127}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.664452570918684, 12.120832537854142, 13.312800216818744]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.803462872404737, 7.1687319787409365, 8.982628664447645]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.612943209356497, -7.296789106047715, -5.999274487279599]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.357925676600075, -8.434745427918472, -6.839153423327048]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5148482189639096, -1.9775557488724875, -1.6235520136822077]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0210732192924303, -2.1158924562862733, -1.9597756976237724]}}