{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:02:57.593947", "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-Jan-17_to_2025-Jan-20_355.0_12.5"}, "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": 2025010000476}, "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 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 20 2025"}, "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": 51364.52638588609}, "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"]}, "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": 12.5}, "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": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 352.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-8.53, 12.53], [-8.0, 12.75], [-7.75, 12.65], [-7.5, 12.75], [-7.25, 12.65], [-7.18, 12.68], [-7.03, 13.03], [-6.5, 13.25], [-6.25, 13.15], [-6.0, 13.25], [-5.75, 13.15], [-5.68, 13.18], [-5.53, 13.53], [-5.0, 13.75], [-4.75, 13.65], [-4.5, 13.75], [-3.97, 13.53], [-3.75, 13.0], [-3.85, 12.75], [-3.75, 12.5], [-3.97, 11.97], [-4.32, 11.82], [-4.47, 11.47], [-4.82, 11.32], [-4.97, 10.97], [-5.5, 10.75], [-5.75, 10.85], [-6.0, 10.75], [-6.25, 10.85], [-6.5, 10.75], [-7.03, 10.97], [-7.18, 11.32], [-7.25, 11.35], [-7.5, 11.25], [-7.75, 11.35], [-8.0, 11.25], [-8.53, 11.47], [-8.75, 12.0], [-8.53, 12.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.0, 11.25], [-8.529999999999973, 11.47], [-8.75, 12.0], [-8.529999999999973, 12.53], [-8.0, 12.75], [-7.75, 12.65], [-7.5, 12.75], [-7.25, 12.65], [-7.180000000000007, 12.68], [-7.029999999999973, 13.03], [-6.5, 13.25], [-6.25, 13.15], [-6.0, 13.25], [-5.75, 13.15], [-5.680000000000007, 13.18], [-5.529999999999973, 13.53], [-5.0, 13.75], [-4.75, 13.65], [-4.5, 13.75], [-3.9700000000000273, 13.53], [-3.75, 13.0], [-3.8500000000000227, 12.75], [-3.75, 12.5], [-3.9700000000000273, 11.97], [-4.319999999999993, 11.82], [-4.470000000000027, 11.47], [-4.819999999999993, 11.32], [-4.970000000000027, 10.97], [-5.5, 10.75], [-5.75, 10.85], [-6.0, 10.75], [-6.25, 10.85], [-6.5, 10.75], [-7.029999999999973, 10.97], [-7.180000000000007, 11.32], [-7.25, 11.35], [-7.5, 11.25], [-7.75, 11.35], [-8.0, 11.25]]]]}, "2025-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.0, 11.25], [-8.529999999999973, 11.47], [-8.75, 12.0], [-8.529999999999973, 12.53], [-8.0, 12.75], [-7.75, 12.65], [-7.5, 12.75], [-7.25, 12.65], [-7.180000000000007, 12.68], [-7.029999999999973, 13.03], [-6.5, 13.25], [-6.25, 13.15], [-6.0, 13.25], [-5.75, 13.15], [-5.680000000000007, 13.18], [-5.529999999999973, 13.53], [-5.0, 13.75], [-4.75, 13.65], [-4.5, 13.75], [-3.9700000000000273, 13.53], [-3.75, 13.0], [-3.8500000000000227, 12.75], [-3.75, 12.5], [-3.9700000000000273, 11.97], [-4.319999999999993, 11.82], [-4.470000000000027, 11.47], [-4.819999999999993, 11.32], [-4.970000000000027, 10.97], [-5.5, 10.75], [-5.75, 10.85], [-6.0, 10.75], [-6.25, 10.85], [-6.5, 10.75], [-7.029999999999973, 10.97], [-7.180000000000007, 11.32], [-7.25, 11.35], [-7.5, 11.25], [-7.75, 11.35], [-8.0, 11.25]]]]}, "2025-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.0, 11.25], [-8.529999999999973, 11.47], [-8.75, 12.0], [-8.529999999999973, 12.53], [-8.0, 12.75], [-7.75, 12.65], [-7.5, 12.75], [-7.25, 12.65], [-7.180000000000007, 12.68], [-7.029999999999973, 13.03], [-6.5, 13.25], [-6.25, 13.15], [-6.0, 13.25], [-5.75, 13.15], [-5.680000000000007, 13.18], [-5.529999999999973, 13.53], [-5.0, 13.75], [-4.75, 13.65], [-4.5, 13.75], [-3.9700000000000273, 13.53], [-3.75, 13.0], [-3.8500000000000227, 12.75], [-3.75, 12.5], [-3.9700000000000273, 11.97], [-4.319999999999993, 11.82], [-4.470000000000027, 11.47], [-4.819999999999993, 11.32], [-4.970000000000027, 10.97], [-5.5, 10.75], [-5.75, 10.85], [-6.0, 10.75], [-6.25, 10.85], [-6.5, 10.75], [-7.029999999999973, 10.97], [-7.180000000000007, 11.32], [-7.25, 11.35], [-7.5, 11.25], [-7.75, 11.35], [-8.0, 11.25]]]]}, "2025-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-7.25, 12.5], [-7.029999999999973, 13.03], [-6.5, 13.25], [-6.0, 13.04], [-5.680000000000007, 13.18], [-5.529999999999973, 13.53], [-5.0, 13.75], [-4.470000000000027, 13.53], [-4.25, 13.0], [-4.350000000000023, 12.75], [-4.25, 12.5], [-4.470000000000027, 11.97], [-5.0, 11.75], [-5.25, 11.85], [-5.5, 11.75], [-5.930000000000007, 11.93], [-5.75, 11.5], [-5.970000000000027, 10.97], [-6.5, 10.75], [-7.029999999999973, 10.97], [-7.25, 11.5], [-7.0400000000000205, 12.0], [-7.25, 12.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.432243850345003}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.9709077822349164}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.424160033581302, 22.887987054563098, 22.65329678105377, 22.668775685628248]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.470278676350915, 21.713838195800804, 21.516075388590536, 21.99318974812826]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8233686918582, -2.447696846210814, -2.732981121475558, -2.6604085185795157]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.432243850345003, -3.116713088075471, -3.4322240952971583, -2.881953214827547]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2004427763093357, -1.3453329705942456, -1.4245265576807975, -1.2852697268809021]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5631889629403934, -1.6660159306554914, -1.7211930762115781, -1.347554858881635]}}