{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:12.930433", "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-Jul-23_to_2025-Jul-25_351.0_23.5"}, "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": 2025070000841}, "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": "July 23 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 25 2025"}, "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": 197128.1120225673}, "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": ["Mauritania", "Morocco"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 23.5}, "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": 351.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "351.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 344.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 352.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 22.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.03, 22.47], [-16.25, 23.0], [-16.03, 23.53], [-15.5, 23.75], [-15.25, 23.65], [-15.18, 23.68], [-15.03, 24.03], [-14.68, 24.18], [-14.53, 24.53], [-14.0, 24.75], [-13.75, 24.65], [-13.68, 24.68], [-13.53, 25.03], [-13.18, 25.18], [-13.03, 25.53], [-12.5, 25.75], [-12.25, 25.65], [-12.0, 25.75], [-11.75, 25.65], [-11.5, 25.75], [-11.25, 25.65], [-11.18, 25.68], [-11.03, 26.03], [-10.68, 26.18], [-10.65, 26.25], [-10.75, 26.5], [-10.53, 27.03], [-10.0, 27.25], [-9.75, 27.15], [-9.5, 27.25], [-9.25, 27.15], [-9.0, 27.25], [-8.75, 27.15], [-8.5, 27.25], [-7.97, 27.03], [-7.75, 26.5], [-7.85, 26.25], [-7.82, 26.18], [-7.47, 26.03], [-7.25, 25.5], [-7.35, 25.25], [-7.25, 25.0], [-7.47, 24.47], [-7.82, 24.32], [-7.85, 24.25], [-7.75, 24.0], [-7.97, 23.47], [-8.32, 23.32], [-8.35, 23.25], [-8.25, 23.0], [-8.47, 22.47], [-9.0, 22.25], [-9.25, 22.35], [-9.5, 22.25], [-9.75, 22.35], [-10.0, 22.25], [-10.25, 22.35], [-10.5, 22.25], [-10.75, 22.35], [-11.0, 22.25], [-11.25, 22.35], [-11.5, 22.25], [-11.75, 22.35], [-12.0, 22.25], [-12.25, 22.35], [-12.32, 22.32], [-12.47, 21.97], [-13.0, 21.75], [-13.53, 21.97], [-13.68, 22.32], [-14.03, 22.47], [-14.2, 22.88], [-14.32, 22.82], [-14.47, 22.47], [-15.0, 22.25], [-15.25, 22.35], [-15.5, 22.25], [-16.03, 22.47]]]]}, "2025-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.03, 22.47], [-16.25, 23.0], [-16.03, 23.53], [-15.5, 23.75], [-15.25, 23.65], [-15.18, 23.68], [-15.03, 24.03], [-14.68, 24.18], [-14.53, 24.53], [-14.0, 24.75], [-13.75, 24.65], [-13.68, 24.68], [-13.53, 25.03], [-13.18, 25.18], [-13.03, 25.53], [-12.5, 25.75], [-12.25, 25.65], [-12.0, 25.75], [-11.75, 25.65], [-11.5, 25.75], [-11.25, 25.65], [-11.18, 25.68], [-11.03, 26.03], [-10.68, 26.18], [-10.65, 26.25], [-10.75, 26.5], [-10.53, 27.03], [-10.0, 27.25], [-9.75, 27.15], [-9.5, 27.25], [-9.25, 27.15], [-9.0, 27.25], [-8.75, 27.15], [-8.5, 27.25], [-7.97, 27.03], [-7.75, 26.5], [-7.85, 26.25], [-7.82, 26.18], [-7.47, 26.03], [-7.25, 25.5], [-7.35, 25.25], [-7.25, 25.0], [-7.47, 24.47], [-7.82, 24.32], [-7.85, 24.25], [-7.75, 24.0], [-7.97, 23.47], [-8.32, 23.32], [-8.35, 23.25], [-8.25, 23.0], [-8.47, 22.47], [-9.0, 22.25], [-9.25, 22.35], [-9.5, 22.25], [-9.75, 22.35], [-10.0, 22.25], [-10.25, 22.35], [-10.5, 22.25], [-10.75, 22.35], [-11.0, 22.25], [-11.25, 22.35], [-11.5, 22.25], [-11.75, 22.35], [-12.0, 22.25], [-12.25, 22.35], [-12.32, 22.32], [-12.47, 21.97], [-13.0, 21.75], [-13.53, 21.97], [-13.68, 22.32], [-14.03, 22.47], [-14.2, 22.88], [-14.32, 22.82], [-14.47, 22.47], [-15.0, 22.25], [-15.25, 22.35], [-15.5, 22.25], [-16.03, 22.47]]]]}, "2025-07-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.03, 22.47], [-16.25, 23.0], [-16.03, 23.53], [-15.5, 23.75], [-15.25, 23.65], [-15.18, 23.68], [-15.03, 24.03], [-14.68, 24.18], [-14.53, 24.53], [-14.0, 24.75], [-13.75, 24.65], [-13.68, 24.68], [-13.53, 25.03], [-13.18, 25.18], [-13.03, 25.53], [-12.5, 25.75], [-12.25, 25.65], [-12.0, 25.75], [-11.75, 25.65], [-11.5, 25.75], [-11.25, 25.65], 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t2m anomaly recorded over entire duration", "value": -8.51125730189915}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.131177081532436}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [30.09056541806177, 27.80208921886623, 28.065644182477683]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.358595784505212, 23.21705271402999, 23.355879720052087]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.728681999568078, -7.006638680093999, -6.65821056493524]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.11941602891585, -8.51125730189915, -7.82584122508996]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6113053452627488, -2.412473678990788, -2.2812514128511405]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9703329856103553, -3.3284728471605662, -2.8817116601289334]}}