{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:36.829258", "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": "2026-Feb-22_to_2026-Feb-24_27.5_-9.0"}, "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": 2026020000518}, "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": "February 22 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 24 2026"}, "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": 70159.17968544808}, "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": ["Congo DRC"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "E.Southern-Africa", "S.Eastern-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": -9.0}, "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": 27.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "27.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 25.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -10.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.97, -7.47], [25.5, -7.25], [26.03, -7.47], [26.18, -7.82], [26.25, -7.85], [26.5, -7.75], [26.75, -7.85], [27.0, -7.75], [27.25, -7.85], [27.5, -7.75], [28.03, -7.97], [28.18, -8.32], [28.53, -8.47], [28.75, -9.0], [28.65, -9.25], [28.68, -9.32], [29.03, -9.47], [29.25, -10.0], [29.03, -10.53], [28.5, -10.75], [28.25, -10.65], [28.18, -10.68], [28.03, -11.03], [27.5, -11.25], [26.97, -11.03], [26.82, -10.68], [26.75, -10.65], [26.5, -10.75], [26.25, -10.65], [26.0, -10.75], [25.47, -10.53], [25.25, -10.0], [25.35, -9.75], [25.25, -9.5], [25.35, -9.25], [25.32, -9.18], [24.97, -9.03], [24.75, -8.5], [24.85, -8.25], [24.75, -8.0], [24.97, -7.47]]]]}, "2026-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.97, -7.47], [25.5, -7.25], [26.03, -7.47], [26.18, -7.82], [26.25, -7.85], [26.5, -7.75], [26.75, -7.85], [27.0, -7.75], [27.25, -7.85], [27.5, -7.75], [28.03, -7.97], [28.18, -8.32], [28.53, -8.47], [28.75, -9.0], [28.65, -9.25], [28.68, -9.32], [29.03, -9.47], [29.25, -10.0], [29.03, -10.53], [28.5, -10.75], [28.25, -10.65], [28.18, -10.68], [28.03, -11.03], [27.5, -11.25], [26.97, -11.03], [26.82, -10.68], [26.75, -10.65], [26.5, -10.75], [26.25, -10.65], [26.0, -10.75], [25.47, -10.53], [25.25, -10.0], [25.35, -9.75], [25.25, -9.5], [25.35, -9.25], [25.32, -9.18], [24.97, -9.03], [24.75, -8.5], [24.85, -8.25], [24.75, -8.0], [24.97, -7.47]]]]}, "2026-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.97, -7.47], [25.5, -7.25], [26.03, -7.47], [26.18, -7.82], [26.25, -7.85], [26.5, -7.75], [26.75, -7.85], [27.0, -7.75], [27.25, -7.85], [27.5, -7.75], [28.03, -7.97], [28.18, -8.32], [28.53, -8.47], [28.75, -9.0], [28.65, -9.25], [28.68, -9.32], [29.03, -9.47], [29.25, -10.0], [29.03, -10.53], [28.5, -10.75], [28.25, -10.65], [28.18, -10.68], [28.03, -11.03], [27.5, -11.25], [26.97, -11.03], [26.82, -10.68], [26.75, -10.65], [26.5, -10.75], [26.25, -10.65], [26.0, -10.75], [25.47, -10.53], [25.25, -10.0], [25.35, -9.75], [25.25, -9.5], [25.35, -9.25], [25.32, -9.18], [24.97, -9.03], [24.75, -8.5], [24.85, -8.25], [24.75, -8.0], [24.97, -7.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1927302516530176}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7877599475735346}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.86585133870443, 20.500964322297477, 20.443706158624195]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.559536234537802, 17.979433949788415, 17.882695770263695]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.196271136043979, -1.5622906277537774, -1.6047180789228472]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1927302516530176, -1.9798865945355715, -2.064213751747104]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.265654124353891, -1.6307551971225862, -1.68488404470668]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.405233687976047, -2.337462884423708, -2.392683203511546]}}