{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-20 10:52:29.272977", "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-Apr-23_to_2026-Apr-25_16.0_-7.0"}, "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": 2026040000700}, "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": "April 23 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 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": 73721.8288927495}, "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", "Congo DRC"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-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": -7.0}, "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": 16.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "16.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 18.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -8.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -4.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, -7.0], [14.47, -6.47], [15.0, -6.25], [15.25, -6.35], [15.32, -6.32], [15.35, -6.25], [15.25, -6.0], [15.47, -5.47], [15.82, -5.32], [15.97, -4.97], [16.32, -4.82], [16.47, -4.47], [17.0, -4.25], [17.25, -4.35], [17.5, -4.25], [17.75, -4.35], [18.0, -4.25], [18.53, -4.47], [18.75, -5.0], [18.65, -5.25], [18.75, -5.5], [18.53, -6.03], [18.18, -6.18], [18.15, -6.25], [18.25, -6.5], [18.03, -7.03], [17.68, -7.18], [17.53, -7.53], [17.18, -7.68], [17.03, -8.03], [16.5, -8.25], [16.25, -8.15], [16.18, -8.18], [16.03, -8.53], [15.5, -8.75], [14.97, -8.53], [14.75, -8.0], [14.85, -7.75], [14.82, -7.68], [14.47, -7.53], [14.25, -7.0]]]]}, "2026-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, -7.0], [14.47, -6.47], [15.0, -6.25], [15.25, -6.35], [15.32, -6.32], [15.35, -6.25], [15.25, -6.0], [15.47, -5.47], [15.82, -5.32], [15.97, -4.97], [16.32, -4.82], [16.47, -4.47], [17.0, -4.25], [17.25, -4.35], [17.5, -4.25], [17.75, -4.35], [18.0, -4.25], [18.53, -4.47], [18.75, -5.0], [18.65, -5.25], [18.75, -5.5], [18.53, -6.03], [18.18, -6.18], [18.15, -6.25], [18.25, -6.5], [18.03, -7.03], [17.68, -7.18], [17.53, -7.53], [17.18, -7.68], [17.03, -8.03], [16.5, -8.25], [16.25, -8.15], [16.18, -8.18], [16.03, -8.53], [15.5, -8.75], [14.97, -8.53], [14.75, -8.0], [14.85, -7.75], [14.82, -7.68], [14.47, -7.53], [14.25, -7.0]]]]}, "2026-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.25, -7.0], [14.47, -6.47], [15.0, -6.25], [15.25, -6.35], [15.32, -6.32], [15.35, -6.25], [15.25, -6.0], [15.47, -5.47], [15.82, -5.32], [15.97, -4.97], [16.32, -4.82], [16.47, -4.47], [17.0, -4.25], [17.25, -4.35], [17.5, -4.25], [17.75, -4.35], [18.0, -4.25], [18.53, -4.47], [18.75, -5.0], [18.65, -5.25], [18.75, -5.5], [18.53, -6.03], [18.18, -6.18], [18.15, -6.25], [18.25, -6.5], [18.03, -7.03], [17.68, -7.18], [17.53, -7.53], [17.18, -7.68], [17.03, -8.03], [16.5, -8.25], [16.25, -8.15], [16.18, -8.18], [16.03, -8.53], [15.5, -8.75], [14.97, -8.53], [14.75, -8.0], [14.85, -7.75], [14.82, -7.68], [14.47, -7.53], [14.25, -7.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.446628262175807}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7639563178301065}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.913866933186853, 22.229208882649743, 21.82999106513131]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.791277821858728, 19.759726460774743, 19.147875722249353]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8220385491325313, -1.5304446401616545, -1.9393857641961343]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.38120721022716, -2.1818315140988034, -2.446628262175807]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9445201154916802, -1.6690019562770282, -2.076332901522328]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3925053248885932, -2.3743901264964564, -2.4887893910964096]}}