{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-05-28 16:19:52.412091", "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-May-15_to_2026-May-18_347.0_22.0"}, "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": 2026050000391}, "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": "May 15 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 18 2026"}, "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": 91060.64618347015}, "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": 22.0}, "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": 347.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "347.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 345.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 348.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.68, 21.82], [-15.03, 21.97], [-15.25, 22.5], [-15.03, 23.03], [-14.68, 23.18], [-14.65, 23.25], [-14.75, 23.5], [-14.65, 23.75], [-14.75, 24.0], [-14.53, 24.53], [-14.18, 24.68], [-14.03, 25.03], [-13.5, 25.25], [-13.25, 25.15], [-13.0, 25.25], [-12.75, 25.15], [-12.5, 25.25], [-11.97, 25.03], [-11.82, 24.68], [-11.47, 24.53], [-11.25, 24.0], [-11.35, 23.75], [-11.25, 23.5], [-11.47, 22.97], [-11.82, 22.82], [-11.85, 22.75], [-11.75, 22.5], [-11.85, 22.25], [-11.75, 22.0], [-11.97, 21.47], [-12.5, 21.25], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.32, 21.32], [-13.47, 20.97], [-13.82, 20.82], [-13.97, 20.47], [-14.5, 20.25], [-15.03, 20.47], [-15.25, 21.0], [-15.03, 21.53], [-14.68, 21.68], [-14.65, 21.75], [-14.68, 21.82]]]]}, "2026-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.68, 21.82], [-15.03, 21.97], [-15.25, 22.5], [-15.03, 23.03], [-14.68, 23.18], [-14.65, 23.25], [-14.75, 23.5], [-14.65, 23.75], [-14.75, 24.0], [-14.53, 24.53], [-14.18, 24.68], [-14.03, 25.03], [-13.5, 25.25], [-13.25, 25.15], [-13.0, 25.25], [-12.75, 25.15], [-12.5, 25.25], [-11.97, 25.03], [-11.82, 24.68], [-11.47, 24.53], [-11.25, 24.0], [-11.35, 23.75], [-11.25, 23.5], [-11.37, 23.2], [-10.97, 23.03], [-10.75, 22.5], [-10.85, 22.25], [-10.75, 22.0], [-10.97, 21.47], [-11.5, 21.25], [-11.75, 21.35], [-12.0, 21.25], [-12.25, 21.35], [-12.5, 21.25], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.32, 21.32], [-13.47, 20.97], [-13.82, 20.82], [-13.97, 20.47], [-14.5, 20.25], [-15.03, 20.47], [-15.25, 21.0], [-15.03, 21.53], [-14.68, 21.68], [-14.65, 21.75], [-14.68, 21.82]]]]}, "2026-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.68, 21.82], [-15.03, 21.97], [-15.25, 22.5], [-15.03, 23.03], [-14.68, 23.18], [-14.65, 23.25], [-14.75, 23.5], [-14.65, 23.75], [-14.75, 24.0], [-14.53, 24.53], [-14.18, 24.68], [-14.03, 25.03], [-13.5, 25.25], [-13.25, 25.15], [-13.0, 25.25], [-12.75, 25.15], [-12.5, 25.25], [-11.97, 25.03], [-11.82, 24.68], [-11.47, 24.53], [-11.25, 24.0], [-11.35, 23.75], [-11.25, 23.5], [-11.37, 23.2], [-10.97, 23.03], [-10.75, 22.5], [-10.85, 22.25], [-10.75, 22.0], [-10.97, 21.47], [-11.5, 21.25], [-11.75, 21.35], [-12.0, 21.25], [-12.25, 21.35], [-12.5, 21.25], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.32, 21.32], [-13.47, 20.97], [-13.82, 20.82], [-13.97, 20.47], [-14.5, 20.25], [-15.03, 20.47], [-15.25, 21.0], [-15.03, 21.53], [-14.68, 21.68], [-14.65, 21.75], [-14.68, 21.82]]]]}, "2026-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.65, 22.75], [-14.75, 23.0], [-14.65, 23.25], [-14.75, 23.5], [-14.65, 23.75], [-14.75, 24.0], [-14.53, 24.53], [-14.0, 24.75], [-13.75, 24.65], [-13.5, 24.75], [-13.25, 24.65], [-13.18, 24.68], [-13.03, 25.03], [-12.5, 25.25], [-11.97, 25.03], [-11.82, 24.68], [-11.47, 24.53], [-11.25, 24.0], [-11.35, 23.75], [-11.25, 23.5], [-11.37, 23.2], [-10.97, 23.03], [-10.75, 22.5], [-10.85, 22.25], [-10.75, 22.0], [-10.97, 21.47], [-11.5, 21.25], [-11.75, 21.35], [-12.0, 21.25], [-12.25, 21.35], [-12.5, 21.25], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.5, 21.25], [-13.75, 21.35], [-14.0, 21.25], [-14.53, 21.47], [-14.75, 22.0], [-14.65, 22.25], [-14.75, 22.5], [-14.65, 22.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.649316714423037}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.527782017567461}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.30401527768089, 22.174559529622456, 23.246266937255825, 23.09537168903114]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.216540273030603, 19.31947479248049, 19.854683176676474, 20.365569051106775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.740073934071357, -5.100155586953177, -4.0523229540348975, -4.19276580092265]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.18729936646281, -5.649316714423037, -4.399498789236418, -4.724615914810386]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2268155589667948, -1.3824986731542162, -1.1258766810553689, -1.192683945894362]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3944303886099834, -1.619818720007865, -1.2469074082706324, -1.2981660198478069]}}