{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:29.550780", "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-Jul-31_to_2025-Aug-02_356.5_14.5"}, "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": 2025070001158}, "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": "July 31 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 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": 77688.63027008428}, "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": ["Burkina Faso", "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": 14.5}, "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": 356.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "356.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 355.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 360.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.0}, "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": [[[[-5.03, 15.53], [-4.5, 15.75], [-4.25, 15.65], [-4.18, 15.68], [-4.03, 16.03], [-3.5, 16.25], [-3.25, 16.15], [-3.0, 16.25], [-2.5, 16.04], [-2.0, 16.25], [-1.5, 16.04], [-1.0, 16.25], [-0.75, 16.15], [-0.68, 16.18], [-0.53, 16.53], [0.0, 16.75], [0.53, 16.53], [0.75, 16.0], [0.53, 15.47], [0.18, 15.32], [0.04, 15.0], [0.25, 14.5], [0.03, 13.97], [-0.5, 13.75], [-0.75, 13.85], [-1.0, 13.75], [-1.25, 13.85], [-1.5, 13.75], [-1.75, 13.85], [-2.0, 13.75], [-2.5, 13.96], [-2.82, 13.82], [-2.97, 13.47], [-3.5, 13.25], [-3.75, 13.35], [-4.0, 13.25], [-4.25, 13.35], [-4.5, 13.25], [-4.75, 13.35], [-5.0, 13.25], [-5.53, 13.47], [-5.75, 14.0], [-5.53, 14.53], [-5.18, 14.68], [-5.15, 14.75], [-5.25, 15.0], [-5.03, 15.53]]]]}}, "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": {"2025-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.149999999999977, 14.75], [-5.25, 15.0], [-5.029999999999973, 15.53], [-4.5, 15.75], [-4.25, 15.65], [-4.180000000000007, 15.68], [-4.029999999999973, 16.03], [-3.5, 16.25], [-3.25, 16.15], [-3.0, 16.25], [-2.5, 16.04], [-2.0, 16.25], [-1.5, 16.04], [-1.0, 16.25], [-0.75, 16.15], [-0.6800000000000068, 16.18], [-0.5299999999999727, 16.53], [0.0, 16.75], [0.5299999999999727, 16.53], [0.75, 16.0], [0.5299999999999727, 15.47], [0.18000000000000682, 15.32], [0.040000000000020464, 15.0], [0.25, 14.5], [0.029999999999972715, 13.97], [-0.5, 13.75], [-0.75, 13.85], [-1.0, 13.75], [-1.25, 13.85], [-1.5, 13.75], [-1.75, 13.85], [-2.0, 13.75], [-2.5, 13.96], [-2.819999999999993, 13.82], [-2.9700000000000273, 13.47], [-3.5, 13.25], [-3.75, 13.35], [-4.0, 13.25], [-4.25, 13.35], [-4.5, 13.25], [-4.75, 13.35], [-5.0, 13.25], [-5.529999999999973, 13.47], [-5.75, 14.0], [-5.529999999999973, 14.53], [-5.180000000000007, 14.68], [-5.149999999999977, 14.75]]]]}, "2025-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.149999999999977, 14.75], [-5.25, 15.0], [-5.029999999999973, 15.53], [-4.5, 15.75], [-4.25, 15.65], [-4.180000000000007, 15.68], [-4.029999999999973, 16.03], [-3.5, 16.25], [-3.25, 16.15], [-3.0, 16.25], [-2.5, 16.04], [-2.0, 16.25], [-1.5, 16.04], [-1.0, 16.25], [-0.75, 16.15], [-0.6800000000000068, 16.18], [-0.5299999999999727, 16.53], [0.0, 16.75], [0.5299999999999727, 16.53], [0.75, 16.0], [0.5299999999999727, 15.47], [0.18000000000000682, 15.32], [0.040000000000020464, 15.0], [0.25, 14.5], [0.029999999999972715, 13.97], [-0.5, 13.75], [-0.75, 13.85], [-1.0, 13.75], [-1.25, 13.85], [-1.5, 13.75], [-1.75, 13.85], [-2.0, 13.75], [-2.5, 13.96], [-2.819999999999993, 13.82], [-2.9700000000000273, 13.47], [-3.5, 13.25], [-3.75, 13.35], [-4.0, 13.25], [-4.25, 13.35], [-4.5, 13.25], [-4.75, 13.35], [-5.0, 13.25], [-5.529999999999973, 13.47], [-5.75, 14.0], [-5.529999999999973, 14.53], [-5.180000000000007, 14.68], [-5.149999999999977, 14.75]]]]}, "2025-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-5.149999999999977, 14.75], [-5.25, 15.0], [-5.029999999999973, 15.53], [-4.5, 15.75], [-4.25, 15.65], [-4.180000000000007, 15.68], [-4.029999999999973, 16.03], [-3.5, 16.25], [-3.25, 16.15], [-3.0, 16.25], [-2.5, 16.04], [-2.0, 16.25], [-1.5, 16.04], [-1.0, 16.25], [-0.75, 16.15], [-0.6800000000000068, 16.18], [-0.5299999999999727, 16.53], [0.0, 16.75], [0.5299999999999727, 16.53], [0.75, 16.0], [0.5299999999999727, 15.47], [0.18000000000000682, 15.32], [0.040000000000020464, 15.0], [0.25, 14.5], [0.029999999999972715, 13.97], [-0.5, 13.75], [-0.75, 13.85], [-1.0, 13.75], [-1.25, 13.85], [-1.5, 13.75], [-1.75, 13.85], [-2.0, 13.75], [-2.5, 13.96], [-2.819999999999993, 13.82], [-2.9700000000000273, 13.47], [-3.5, 13.25], [-3.75, 13.35], [-4.0, 13.25], [-4.25, 13.35], [-4.5, 13.25], [-4.75, 13.35], [-5.0, 13.25], [-5.529999999999973, 13.47], [-5.75, 14.0], [-5.529999999999973, 14.53], [-5.180000000000007, 14.68], [-5.149999999999977, 14.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.4372350774736447}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.4859118835752336}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.68734502156576, 26.262273864746135, 26.43067738850914]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.60561650594076, 24.396043395996116, 24.733369445800804]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.3431230261746965, -2.6728610149154837, -2.441751609635521]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.997118640296378, -3.091881354696511, -3.4372350774736447]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7088074678765313, -1.9314195079674459, -1.7248983056217813]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4173038395275066, -2.18180917800655, -2.280806691655813]}}