{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:52.069328", "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-Jun-30_to_2025-Jul-02_345.0_15.5"}, "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": 2025060000895}, "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": "June 30 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 02 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": 56322.29758564949}, "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", "Senegal"]}, "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": 15.5}, "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": 345.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.0\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": 346.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.75}, "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": {"2025-06-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.15, 15.75], [-16.25, 16.0], [-16.15, 16.25], [-16.25, 16.5], [-16.04, 17.0], [-16.25, 17.5], [-16.03, 18.03], [-15.5, 18.25], [-15.25, 18.15], [-15.0, 18.25], [-14.75, 18.15], [-14.5, 18.25], [-14.25, 18.15], [-14.0, 18.25], [-13.47, 18.03], [-13.25, 17.5], [-13.35, 17.25], [-13.25, 17.0], [-13.35, 16.75], [-13.25, 16.5], [-13.35, 16.25], [-13.25, 16.0], [-13.47, 15.47], [-13.82, 15.32], [-13.97, 14.97], [-14.5, 14.75], [-14.75, 14.85], [-14.82, 14.82], [-14.97, 14.47], [-15.5, 14.25], [-16.03, 14.47], [-16.25, 15.0], [-16.15, 15.25], [-16.25, 15.5], [-16.15, 15.75]]]]}, "2025-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.15, 15.75], [-16.25, 16.0], [-16.15, 16.25], [-16.25, 16.5], [-16.04, 17.0], [-16.25, 17.5], [-16.03, 18.03], [-15.5, 18.25], [-15.25, 18.15], [-15.0, 18.25], [-14.75, 18.15], [-14.5, 18.25], [-14.25, 18.15], [-14.0, 18.25], [-13.47, 18.03], [-13.25, 17.5], [-13.35, 17.25], [-13.25, 17.0], [-13.35, 16.75], [-13.25, 16.5], [-13.35, 16.25], [-13.25, 16.0], [-13.47, 15.47], [-13.82, 15.32], [-13.97, 14.97], [-14.5, 14.75], [-14.75, 14.85], [-14.82, 14.82], [-14.97, 14.47], [-15.5, 14.25], [-16.03, 14.47], [-16.25, 15.0], [-16.15, 15.25], [-16.25, 15.5], [-16.15, 15.75]]]]}, "2025-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.15, 15.75], [-16.25, 16.0], [-16.15, 16.25], [-16.25, 16.5], [-16.04, 17.0], [-16.25, 17.5], [-16.03, 18.03], [-15.5, 18.25], [-15.25, 18.15], [-15.0, 18.25], [-14.75, 18.15], [-14.5, 18.25], [-14.25, 18.15], [-14.0, 18.25], [-13.47, 18.03], [-13.25, 17.5], [-13.35, 17.25], [-13.25, 17.0], [-13.35, 16.75], [-13.25, 16.5], [-13.35, 16.25], [-13.25, 16.0], [-13.47, 15.47], [-13.82, 15.32], [-13.97, 14.97], [-14.5, 14.75], [-14.75, 14.85], [-14.82, 14.82], [-14.97, 14.47], [-15.5, 14.25], [-16.03, 14.47], [-16.25, 15.0], [-16.15, 15.25], [-16.25, 15.5], [-16.15, 15.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.1509690613898442}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3113855553961162}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.15227935523319, 28.94449266132557, 29.17540920324501]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.042437489827478, 26.707710520426474, 27.098723347981775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.3118430504536245, -2.465370594982861, -2.1569430207518634]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.7302913439510803, -3.1509690613898442, -3.0286071445128755]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4293990319583831, -1.5466992043286125, -1.3890443479816668]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8983875712375735, -1.8455595200071513, -1.638214133600599]}}