{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:26.255523", "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-Oct-25_to_2025-Oct-28_13.0_-18.5"}, "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": 2025100000550}, "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 25 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 28 2025"}, "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": 55097.778159864494}, "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": ["Namibia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-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": -18.5}, "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": 13.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 11.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 15.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[12.25, -19.0], [12.47, -18.47], [13.0, -18.25], [13.53, -18.47], [13.75, -19.0], [13.63, -19.3], [14.03, -19.47], [14.18, -19.82], [14.53, -19.97], [14.75, -20.5], [14.63, -20.8], [14.75, -20.85], [15.0, -20.75], [15.53, -20.97], [15.75, -21.5], [15.65, -21.75], [15.75, -22.0], [15.65, -22.25], [15.75, -22.5], [15.53, -23.03], [15.0, -23.25], [14.47, -23.03], [14.32, -22.68], [13.97, -22.53], [13.75, -22.0], [13.85, -21.75], [13.75, -21.5], [13.88, -21.2], [13.47, -21.03], [13.32, -20.68], [12.97, -20.53], [12.75, -20.0], [12.88, -19.7], [12.47, -19.53], [12.25, -19.0]]]]}, "2025-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, -18.0], [11.47, -17.47], [12.0, -17.25], [12.25, -17.35], [12.5, -17.25], [13.03, -17.47], [13.18, -17.82], [13.53, -17.97], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.15, -19.75], [14.18, -19.82], [14.53, -19.97], [14.68, -20.32], [15.03, -20.47], [15.18, -20.82], [15.53, -20.97], [15.75, -21.5], [15.65, -21.75], [15.75, -22.0], [15.65, -22.25], [15.75, -22.5], [15.53, -23.03], [15.0, -23.25], [14.47, -23.03], [14.32, -22.68], [13.97, -22.53], [13.82, -22.18], [13.47, -22.03], [13.25, -21.5], [13.35, -21.25], [13.32, -21.18], [12.97, -21.03], [12.75, -20.5], [12.85, -20.25], [12.82, -20.18], [12.47, -20.03], [12.25, -19.5], [12.35, -19.25], [12.32, -19.18], [11.97, -19.03], [11.82, -18.68], [11.47, -18.53], [11.25, -18.0]]]]}, "2025-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, -18.0], [11.47, -17.47], [12.0, -17.25], [12.25, -17.35], [12.5, -17.25], [13.03, -17.47], [13.18, -17.82], [13.53, -17.97], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.15, -19.75], [14.18, -19.82], [14.53, -19.97], [14.68, -20.32], [15.03, -20.47], [15.18, -20.82], [15.53, -20.97], [15.75, -21.5], [15.65, -21.75], [15.75, -22.0], [15.65, -22.25], [15.75, -22.5], [15.53, -23.03], [15.0, -23.25], [14.47, -23.03], [14.32, -22.68], [13.97, -22.53], [13.82, -22.18], [13.47, -22.03], [13.25, -21.5], [13.35, -21.25], [13.32, -21.18], [12.97, -21.03], [12.75, -20.5], [12.85, -20.25], [12.82, -20.18], [12.47, -20.03], [12.25, -19.5], [12.35, -19.25], [12.32, -19.18], [11.97, -19.03], [11.82, -18.68], [11.47, -18.53], [11.25, -18.0]]]]}, "2025-10-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.25, -18.0], [11.47, -17.47], [12.0, -17.25], [12.25, -17.35], [12.5, -17.25], [13.03, -17.47], [13.18, -17.82], [13.53, -17.97], [13.68, -18.32], [14.03, -18.47], [14.25, -19.0], [14.15, -19.25], [14.25, -19.5], [14.15, -19.75], [14.25, -20.0], [14.15, -20.25], [14.18, -20.32], [14.25, -20.35], [14.5, -20.25], [15.03, -20.47], [15.25, -21.0], [15.04, -21.5], [15.25, -22.0], [15.03, -22.53], [14.5, -22.75], [13.97, -22.53], [13.82, -22.18], [13.47, -22.03], [13.25, -21.5], [13.35, -21.25], [13.32, -21.18], [12.97, -21.03], [12.75, -20.5], [12.85, -20.25], [12.82, -20.18], [12.47, -20.03], [12.25, -19.5], [12.35, -19.25], [12.32, -19.18], [11.97, -19.03], [11.82, -18.68], [11.47, -18.53], [11.25, -18.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.225179731773551}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.575332471551897}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.238607025146507, 15.979200115538504, 15.242647793418541, 17.30752915881925]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.582285817464196, 13.670674896240257, 13.170896148681663, 14.460802968343103]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.05926052331651, -4.700921514035973, -5.512207961646134, -3.4283145763301173]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.011108116355615, -7.033691777480271, -7.225179731773551, -4.516267259009169]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3539015129022396, -1.7906024050237175, -2.1430564491181094, -1.4432148181767717]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5352596362855966, -2.726995756195655, -3.0003437030321605, -1.7400571101757825]}}