{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:27.580509", "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": "2023-Jan-29_to_2023-Feb-02_345.0_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": 2023010001351}, "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 29 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 02 2023"}, "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": 74660.53406438931}, "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": ["Gambia", "Mali", "Mauritania", "Senegal"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 345.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 343.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 348.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 13.5}, "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": [[[[-16.68, 15.18], [-16.53, 15.53], [-16.0, 15.75], [-15.75, 15.65], [-15.68, 15.68], [-15.53, 16.03], [-15.0, 16.25], [-14.75, 16.15], [-14.5, 16.25], [-14.25, 16.15], [-14.0, 16.25], [-13.5, 16.04], [-13.0, 16.25], [-12.7, 16.12], [-12.53, 16.53], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-10.97, 16.53], [-10.75, 16.0], [-10.85, 15.75], [-10.75, 15.5], [-10.97, 14.97], [-11.5, 14.75], [-11.75, 14.85], [-11.82, 14.82], [-11.97, 14.47], [-12.5, 14.25], [-12.75, 14.35], [-13.0, 14.25], [-13.25, 14.35], [-13.32, 14.32], [-13.47, 13.97], [-14.0, 13.75], [-14.25, 13.85], [-14.37, 13.8], [-14.25, 13.5], [-14.47, 12.97], [-15.0, 12.75], [-15.53, 12.97], [-15.68, 13.32], [-15.75, 13.35], [-16.0, 13.25], [-16.53, 13.47], [-16.68, 13.82], [-17.03, 13.97], [-17.25, 14.5], [-17.03, 15.03], [-16.68, 15.18]]]]}}, "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": {"2023-01-29T11:30:00.000000000": 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[-15.680000000000007, 13.32], [-15.75, 13.35], [-16.0, 13.25], [-16.529999999999973, 13.47], [-16.680000000000007, 13.82], [-17.029999999999973, 13.97]]]]}, "2023-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.029999999999973, 13.97], [-17.25, 14.5], [-17.029999999999973, 15.03], [-16.680000000000007, 15.18], [-16.529999999999973, 15.53], [-16.0, 15.75], [-15.75, 15.65], [-15.680000000000007, 15.68], [-15.529999999999973, 16.03], [-15.0, 16.25], [-14.75, 16.15], [-14.5, 16.25], [-14.25, 16.15], [-14.0, 16.25], [-13.5, 16.04], [-13.0, 16.25], [-12.699999999999989, 16.12], [-12.529999999999973, 16.53], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-10.970000000000027, 16.53], [-10.75, 16.0], [-10.850000000000023, 15.75], [-10.75, 15.5], [-10.970000000000027, 14.97], [-11.5, 14.75], [-11.75, 14.85], [-11.819999999999993, 14.82], [-11.970000000000027, 14.47], [-12.5, 14.25], [-12.75, 14.35], [-13.0, 14.25], [-13.25, 14.35], [-13.319999999999993, 14.32], [-13.470000000000027, 13.97], [-14.0, 13.75], [-14.25, 13.85], [-14.370000000000005, 13.8], [-14.25, 13.5], [-14.470000000000027, 12.97], [-15.0, 12.75], [-15.529999999999973, 12.97], [-15.680000000000007, 13.32], [-15.75, 13.35], [-16.0, 13.25], [-16.529999999999973, 13.47], [-16.680000000000007, 13.82], [-17.029999999999973, 13.97]]]]}, "2023-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.029999999999973, 13.97], [-17.25, 14.5], [-17.029999999999973, 15.03], [-16.680000000000007, 15.18], [-16.529999999999973, 15.53], [-16.0, 15.75], [-15.75, 15.65], [-15.680000000000007, 15.68], [-15.529999999999973, 16.03], [-15.0, 16.25], [-14.75, 16.15], [-14.5, 16.25], [-14.25, 16.15], [-14.0, 16.25], [-13.5, 16.04], [-13.0, 16.25], [-12.699999999999989, 16.12], [-12.529999999999973, 16.53], [-12.0, 16.75], [-11.75, 16.65], [-11.5, 16.75], [-10.970000000000027, 16.53], [-10.75, 16.0], [-10.850000000000023, 15.75], [-10.75, 15.5], [-10.970000000000027, 14.97], [-11.5, 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15.0], [-16.029999999999973, 15.53], [-15.5, 15.75], [-15.25, 15.65], [-15.0, 15.75], [-14.470000000000027, 15.53], [-14.25, 15.0], [-14.470000000000027, 14.47], [-15.0, 14.25], [-15.25, 14.35], [-15.5, 14.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.719203427016055}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5440251165874304}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.918093470244457, 21.648791546031134, 22.905425601760726, 22.072306208765553, 22.319379558864682]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.350911472004952, 20.276616330693344, 21.056787166634592, 21.984571722621922, 22.130042019207337]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7248359335126473, -4.081728335394141, -2.9345513044591938, -2.9218284641538617, -2.8032189739748503]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.719203427016055, -4.58771264521954, -3.9041706099447993, -3.065267238044896, -3.044142516939246]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7888511785407135, -1.9460624769509116, -1.4009813369034658, -1.392971787328682, -1.3502011730472514]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.104927326365636, -2.2917928491226673, -1.814872770371274, -1.4353925569779025, -1.443878622557736]}}