{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:51.420376", "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-19_to_2026-Jan-23_355.5_13.5"}, "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": 2026010000588}, "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 19 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 23 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": 125750.29043448526}, "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": ["Guinea", "Mali"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["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": 13.5}, "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": 355.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 350.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 356.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.0}, "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": [[[[-3.75, 13.0], [-3.97, 12.47], [-4.5, 12.25], [-5.03, 12.47], [-5.18, 12.82], [-5.53, 12.97], [-5.68, 13.32], [-5.75, 13.35], [-6.0, 13.25], [-6.25, 13.35], [-6.5, 13.25], [-6.75, 13.35], [-7.0, 13.25], [-7.25, 13.35], [-7.5, 13.25], [-7.75, 13.35], [-8.0, 13.25], [-8.25, 13.35], [-8.5, 13.25], [-8.75, 13.35], [-8.82, 13.32], [-8.85, 13.25], [-8.82, 13.18], [-8.47, 13.03], [-8.25, 12.5], [-8.35, 12.25], [-8.25, 12.0], [-8.47, 11.47], [-9.0, 11.25], [-9.53, 11.47], [-9.75, 12.0], [-9.65, 12.25], [-9.68, 12.32], [-10.03, 12.47], [-10.25, 13.0], [-10.15, 13.25], [-10.25, 13.5], [-10.15, 13.75], [-10.25, 14.0], [-10.03, 14.53], [-9.5, 14.75], [-9.25, 14.65], [-9.18, 14.68], [-9.03, 15.03], [-8.5, 15.25], [-8.25, 15.15], [-8.18, 15.18], [-8.03, 15.53], [-7.68, 15.68], [-7.53, 16.03], [-7.0, 16.25], [-6.75, 16.15], [-6.5, 16.25], [-6.25, 16.15], [-6.0, 16.25], [-5.75, 16.15], [-5.68, 16.18], [-5.53, 16.53], [-5.0, 16.75], [-4.47, 16.53], [-4.25, 16.0], [-4.35, 15.75], [-4.3, 15.62], [-4.18, 15.68], [-4.03, 16.03], [-3.5, 16.25], [-2.97, 16.03], [-2.75, 15.5], [-2.97, 14.97], [-3.32, 14.82], [-3.46, 14.5], [-3.25, 14.0], [-3.47, 13.47], [-3.82, 13.32], [-3.85, 13.25], [-3.75, 13.0]]]]}}, "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": {"2026-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.25, 15.0], [-6.029999999999973, 15.53], [-5.5, 15.75], [-5.25, 15.65], [-5.0, 15.75], [-4.470000000000027, 15.53], [-4.25, 15.0], [-4.350000000000023, 14.75], [-4.25, 14.5], [-4.3700000000000045, 14.2], [-3.9700000000000273, 14.03], [-3.75, 13.5], [-3.9700000000000273, 12.97], [-4.5, 12.75], [-5.029999999999973, 12.97], [-5.25, 13.5], [-5.1200000000000045, 13.8], [-5.25, 13.85], [-5.5, 13.75], [-6.029999999999973, 13.97], [-6.25, 14.5], [-6.149999999999977, 14.75], [-6.25, 15.0]]]]}, "2026-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": 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"evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.591631825765035, 20.258483414422926, 19.533208102271715, 20.473011271158896, 21.499190690782427]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.600827789306663, 17.37046839396163, 16.39956436157229, 17.679432169596396, 21.428525543212913]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3633323988580512, -3.64812453900003, -4.434176411370616, -3.640124316081192, -3.5580565007470946]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5696765209519867, -4.568154003818336, -5.4496346162505915, -4.5133975809927165, -3.7397538817497775]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4697709029293164, -1.5555199428381914, -1.7993150742378383, -1.444141477293771, -1.4570064400846123]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5234070677026172, -1.8835819231756448, -2.088845355649766, -1.8891542547301743, -1.5383243484420241]}}