{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:49.393990", "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-Jan-15_to_2026-Jan-19_30.0_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": 2026010000480}, "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": "January 15 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 19 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 73626.59039271214}, "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": ["South Sudan"]}, "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": 30.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "30.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 28.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 32.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[28.0, 8.75], [28.25, 8.65], [28.5, 8.75], [29.03, 8.53], [29.18, 8.18], [29.25, 8.15], [29.32, 8.18], [29.47, 8.53], [30.0, 8.75], [30.25, 8.65], [30.5, 8.75], [30.75, 8.65], [31.0, 8.75], [31.53, 8.53], [31.75, 8.0], [31.54, 7.5], [31.7, 7.13], [32.0, 7.25], [32.53, 7.03], [32.75, 6.5], [32.65, 6.25], [32.75, 6.0], [32.53, 5.47], [32.18, 5.32], [32.03, 4.97], [31.5, 4.75], [30.97, 4.97], [30.82, 5.32], [30.75, 5.35], [30.5, 5.25], [29.97, 5.47], [29.82, 5.82], [29.47, 5.97], [29.32, 6.32], [29.25, 6.35], [29.0, 6.25], [28.47, 6.47], [28.32, 6.82], [27.97, 6.97], [27.82, 7.32], [27.47, 7.47], [27.25, 8.0], [27.47, 8.53], [28.0, 8.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Eastern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.47, 7.53], [30.0, 7.75], [30.53, 7.53], [30.75, 7.0], [30.53, 6.47], [30.0, 6.25], [29.47, 6.47], [29.25, 7.0], [29.47, 7.53]]]]}, "2026-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 7.47], [27.25, 8.0], [27.47, 8.53], [28.0, 8.75], [28.25, 8.65], [28.5, 8.75], [29.03, 8.53], [29.18, 8.18], [29.25, 8.15], [29.32, 8.18], [29.47, 8.53], [30.0, 8.75], [30.25, 8.65], [30.5, 8.75], [30.75, 8.65], [31.0, 8.75], [31.53, 8.53], [31.75, 8.0], [31.54, 7.5], [31.7, 7.13], [32.0, 7.25], [32.53, 7.03], [32.75, 6.5], [32.65, 6.25], [32.75, 6.0], [32.53, 5.47], [32.18, 5.32], [32.03, 4.97], [31.5, 4.75], [30.97, 4.97], [30.82, 5.32], [30.75, 5.35], [30.5, 5.25], [29.97, 5.47], [29.82, 5.82], [29.47, 5.97], [29.32, 6.32], [29.25, 6.35], [29.0, 6.25], [28.47, 6.47], [28.32, 6.82], [27.97, 6.97], [27.82, 7.32], [27.47, 7.47]]]]}, "2026-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 7.47], [27.25, 8.0], [27.47, 8.53], [28.0, 8.75], [28.25, 8.65], [28.5, 8.75], [29.03, 8.53], [29.18, 8.18], [29.25, 8.15], [29.32, 8.18], [29.47, 8.53], [30.0, 8.75], [30.25, 8.65], [30.5, 8.75], [30.75, 8.65], [31.0, 8.75], [31.53, 8.53], [31.75, 8.0], [31.54, 7.5], [31.7, 7.13], [32.0, 7.25], [32.53, 7.03], [32.75, 6.5], [32.65, 6.25], [32.75, 6.0], [32.53, 5.47], [32.18, 5.32], [32.03, 4.97], [31.5, 4.75], [30.97, 4.97], [30.82, 5.32], [30.75, 5.35], [30.5, 5.25], [29.97, 5.47], [29.82, 5.82], [29.47, 5.97], [29.32, 6.32], [29.25, 6.35], [29.0, 6.25], [28.47, 6.47], [28.32, 6.82], [27.97, 6.97], [27.82, 7.32], [27.47, 7.47]]]]}, "2026-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.47, 7.47], [27.25, 8.0], [27.47, 8.53], [28.0, 8.75], [28.25, 8.65], [28.5, 8.75], [29.03, 8.53], [29.18, 8.18], [29.25, 8.15], [29.32, 8.18], [29.47, 8.53], [30.0, 8.75], [30.25, 8.65], [30.5, 8.75], [30.75, 8.65], [31.0, 8.75], [31.53, 8.53], [31.75, 8.0], [31.54, 7.5], [31.7, 7.13], [32.0, 7.25], [32.53, 7.03], [32.75, 6.5], [32.65, 6.25], [32.75, 6.0], [32.53, 5.47], [32.18, 5.32], [32.03, 4.97], [31.5, 4.75], [30.97, 4.97], [30.82, 5.32], [30.75, 5.35], [30.5, 5.25], [29.97, 5.47], [29.82, 5.82], [29.47, 5.97], [29.32, 6.32], [29.25, 6.35], [29.0, 6.25], [28.47, 6.47], [28.32, 6.82], [27.97, 6.97], [27.82, 7.32], [27.47, 7.47]]]]}, "2026-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[29.0, 6.75], [28.47, 6.97], [28.25, 7.5], [28.47, 8.03], [29.0, 8.25], [29.25, 8.15], [29.5, 8.25], [30.03, 8.03], [30.18, 7.68], [30.53, 7.53], [30.75, 7.0], [30.57, 6.57], [31.0, 6.75], [31.25, 6.65], [31.5, 6.75], [32.03, 6.53], [32.25, 6.0], [32.03, 5.47], [31.5, 5.25], [31.25, 5.35], [31.0, 5.25], [30.47, 5.47], [30.25, 6.0], [30.43, 6.43], [30.0, 6.25], [29.47, 6.47], [29.32, 6.82], [29.25, 6.85], [29.0, 6.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.3884146198882945}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0779637985291757}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.752781168619833, 25.589929623074, 25.885294426812095, 26.621809895833337, 27.102666982015023]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.752781168619833, 24.1612322489421, 24.878475443522177, 25.671929931640648, 26.18302179972335]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9783876357030863, -3.484392407699, -3.278761723822619, -2.6385971408545337, -2.2921516225089933]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.9783876357030863, -4.3884146198882945, -3.955339768581041, -3.3516876289300512, -2.5190830806735107]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3730996789202763, -1.7745958805611863, -1.7650437906061487, -1.4578577423817916, -1.2425554388299176]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3730996789202763, -2.0663255726847645, -2.1074031516038514, -1.7759187400291137, -1.287604642072384]}}