{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:43.308697", "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-12_to_2025-Jun-17_347.5_15.0"}, "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": 2025060000447}, "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 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 17 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 77556.32658094859}, "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": ["Mali", "Mauritania", "Senegal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "Africa", "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": 15.0}, "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": 347.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "347.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 345.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 349.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 16.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.18, 16.18], [-13.03, 16.53], [-12.5, 16.75], [-12.25, 16.65], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-11.25, 16.65], [-11.0, 16.75], [-10.47, 16.53], [-10.25, 16.0], [-10.35, 15.75], [-10.25, 15.5], [-10.47, 14.97], [-10.82, 14.82], [-10.97, 14.47], [-11.5, 14.25], [-11.75, 14.35], [-11.82, 14.32], [-11.97, 13.97], [-12.5, 13.75], [-12.75, 13.85], [-13.0, 13.75], [-13.25, 13.85], [-13.5, 13.75], [-13.75, 13.85], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-14.75, 13.85], [-15.0, 13.75], [-15.53, 13.97], [-15.75, 14.5], [-15.65, 14.75], [-15.75, 15.0], [-15.65, 15.25], [-15.75, 15.5], [-15.53, 16.03], [-15.0, 16.25], [-14.5, 16.04], [-14.0, 16.25], [-13.75, 16.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara", "Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.649999999999977, 15.25], [-13.75, 15.5], [-13.529999999999973, 16.03], [-13.0, 16.25], [-12.75, 16.15], [-12.680000000000007, 16.18], [-12.529999999999973, 16.53], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-11.25, 16.65], [-11.0, 16.75], [-10.470000000000027, 16.53], [-10.25, 16.0], [-10.350000000000023, 15.75], [-10.25, 15.5], [-10.470000000000027, 14.97], [-10.819999999999993, 14.82], [-10.970000000000027, 14.47], [-11.5, 14.25], [-11.75, 14.35], [-11.819999999999993, 14.32], [-11.970000000000027, 13.97], [-12.5, 13.75], [-12.75, 13.85], [-13.0, 13.75], [-13.25, 13.85], [-13.5, 13.75], [-14.029999999999973, 13.97], [-14.25, 14.5], [-14.029999999999973, 15.03], [-13.680000000000007, 15.18], [-13.649999999999977, 15.25]]]]}, "2025-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.75, 15.0], [-15.529999999999973, 15.53], [-15.0, 15.75], [-14.75, 15.65], [-14.680000000000007, 15.68], [-14.529999999999973, 16.03], [-14.0, 16.25], [-13.75, 16.15], [-13.5, 16.25], [-13.25, 16.15], [-13.180000000000007, 16.18], [-13.029999999999973, 16.53], [-12.5, 16.75], [-12.25, 16.65], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-11.25, 16.65], [-11.0, 16.75], [-10.470000000000027, 16.53], [-10.25, 16.0], [-10.350000000000023, 15.75], [-10.25, 15.5], [-10.470000000000027, 14.97], [-10.819999999999993, 14.82], [-10.970000000000027, 14.47], [-11.5, 14.25], [-11.75, 14.35], [-11.819999999999993, 14.32], [-11.970000000000027, 13.97], [-12.5, 13.75], [-12.75, 13.85], [-13.0, 13.75], [-13.25, 13.85], [-13.5, 13.75], [-13.75, 13.85], [-14.0, 13.75], [-14.25, 13.85], [-14.5, 13.75], [-14.75, 13.85], [-15.0, 13.75], [-15.529999999999973, 13.97], [-15.75, 14.5], [-15.649999999999977, 14.75], [-15.75, 15.0]]]]}, "2025-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.75, 15.0], [-15.529999999999973, 15.53], [-15.0, 15.75], [-14.75, 15.65], [-14.680000000000007, 15.68], [-14.529999999999973, 16.03], [-14.0, 16.25], [-13.75, 16.15], [-13.5, 16.25], 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evolution of mean t2m anomalies.", "value": [-2.7823765103188367, -5.140855385392469, -2.7479537826911793, -2.856842454921116, -1.9020702161414988, -2.629563131123561]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6226854794574024, -7.004124289244203, -4.048396622047221, -3.427517559075227, -2.2351519247224587, -3.4966602758774457]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7744504880398668, -3.4690503555132732, -1.8276298411451035, -1.9768565517907517, -1.376000982730827, -1.8085186560830286]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2729196613554, -4.607976103869688, -2.6301108981764805, -2.3802894458819552, -1.7142639610390784, -2.2632119263657717]}}