{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:47.135850", "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-Aug-06_to_2023-Aug-08_345.5_22.0"}, "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": 2023080000252}, "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": "August 06 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 08 2023"}, "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": 114284.36646249461}, "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": ["Mauritania"]}, "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": 22.0}, "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": 345.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.5\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": 21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-16.53, 23.03], [-16.18, 23.18], [-16.03, 23.53], [-15.68, 23.68], [-15.53, 24.03], [-15.18, 24.18], [-15.03, 24.53], [-14.5, 24.75], [-14.25, 24.65], [-14.0, 24.75], [-13.47, 24.53], [-13.32, 24.18], [-12.97, 24.03], [-12.8, 23.62], [-12.5, 23.75], [-11.97, 23.53], [-11.82, 23.18], [-11.75, 23.15], [-11.5, 23.25], [-10.97, 23.03], [-10.75, 22.5], [-10.85, 22.25], [-10.75, 22.0], [-10.85, 21.75], [-10.75, 21.5], [-10.97, 20.97], [-11.5, 20.75], [-11.75, 20.85], [-12.0, 20.75], [-12.53, 20.97], [-12.68, 21.32], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.32, 21.32], [-13.47, 20.97], [-14.0, 20.75], [-14.25, 20.85], [-14.5, 20.75], [-14.75, 20.85], [-15.0, 20.75], [-15.25, 20.85], [-15.5, 20.75], [-15.75, 20.85], [-16.0, 20.75], [-16.25, 20.85], [-16.5, 20.75], [-17.03, 20.97], [-17.25, 21.5], [-17.03, 22.03], [-16.68, 22.18], [-16.65, 22.25], [-16.75, 22.5], [-16.53, 23.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.649999999999977, 22.25], [-16.75, 22.5], [-16.529999999999973, 23.03], [-16.180000000000007, 23.18], [-16.029999999999973, 23.53], [-15.680000000000007, 23.68], [-15.529999999999973, 24.03], [-15.180000000000007, 24.18], [-15.029999999999973, 24.53], [-14.5, 24.75], [-14.25, 24.65], [-14.0, 24.75], [-13.470000000000027, 24.53], [-13.319999999999993, 24.18], [-12.970000000000027, 24.03], [-12.800000000000011, 23.62], [-12.5, 23.75], [-11.970000000000027, 23.53], [-11.819999999999993, 23.18], [-11.75, 23.15], [-11.5, 23.25], [-10.970000000000027, 23.03], [-10.75, 22.5], [-10.850000000000023, 22.25], [-10.75, 22.0], [-10.850000000000023, 21.75], [-10.75, 21.5], [-10.970000000000027, 20.97], [-11.5, 20.75], [-11.75, 20.85], [-12.0, 20.75], [-12.529999999999973, 20.97], [-12.680000000000007, 21.32], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.319999999999993, 21.32], [-13.470000000000027, 20.97], [-14.0, 20.75], [-14.25, 20.85], [-14.5, 20.75], [-14.75, 20.85], [-15.0, 20.75], [-15.25, 20.85], [-15.5, 20.75], [-15.75, 20.85], [-16.0, 20.75], [-16.25, 20.85], [-16.5, 20.75], [-17.029999999999973, 20.97], [-17.25, 21.5], [-17.029999999999973, 22.03], [-16.680000000000007, 22.18], [-16.649999999999977, 22.25]]]]}, "2023-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.649999999999977, 22.25], [-16.75, 22.5], [-16.529999999999973, 23.03], [-16.180000000000007, 23.18], [-16.029999999999973, 23.53], [-15.680000000000007, 23.68], [-15.529999999999973, 24.03], [-15.180000000000007, 24.18], [-15.029999999999973, 24.53], [-14.5, 24.75], [-14.25, 24.65], [-14.0, 24.75], [-13.470000000000027, 24.53], [-13.319999999999993, 24.18], [-12.970000000000027, 24.03], [-12.800000000000011, 23.62], [-12.5, 23.75], [-11.970000000000027, 23.53], [-11.819999999999993, 23.18], [-11.75, 23.15], [-11.5, 23.25], [-10.970000000000027, 23.03], [-10.75, 22.5], [-10.850000000000023, 22.25], [-10.75, 22.0], [-10.850000000000023, 21.75], [-10.75, 21.5], [-10.970000000000027, 20.97], [-11.5, 20.75], [-11.75, 20.85], [-12.0, 20.75], [-12.529999999999973, 20.97], [-12.680000000000007, 21.32], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.319999999999993, 21.32], [-13.470000000000027, 20.97], [-14.0, 20.75], [-14.25, 20.85], [-14.5, 20.75], [-14.75, 20.85], [-15.0, 20.75], [-15.25, 20.85], [-15.5, 20.75], [-15.75, 20.85], [-16.0, 20.75], [-16.25, 20.85], [-16.5, 20.75], [-17.029999999999973, 20.97], [-17.25, 21.5], [-17.029999999999973, 22.03], [-16.680000000000007, 22.18], [-16.649999999999977, 22.25]]]]}, "2023-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.649999999999977, 22.25], [-16.75, 22.5], [-16.529999999999973, 23.03], [-16.180000000000007, 23.18], [-16.029999999999973, 23.53], [-15.680000000000007, 23.68], [-15.529999999999973, 24.03], [-15.180000000000007, 24.18], [-15.029999999999973, 24.53], [-14.5, 24.75], [-14.25, 24.65], [-14.0, 24.75], [-13.470000000000027, 24.53], [-13.319999999999993, 24.18], [-12.970000000000027, 24.03], [-12.800000000000011, 23.62], [-12.5, 23.75], [-11.970000000000027, 23.53], [-11.819999999999993, 23.18], [-11.75, 23.15], [-11.5, 23.25], [-10.970000000000027, 23.03], [-10.75, 22.5], [-10.850000000000023, 22.25], [-10.75, 22.0], [-10.850000000000023, 21.75], [-10.75, 21.5], [-10.970000000000027, 20.97], [-11.5, 20.75], [-11.75, 20.85], [-12.0, 20.75], [-12.529999999999973, 20.97], [-12.680000000000007, 21.32], [-12.75, 21.35], [-13.0, 21.25], [-13.25, 21.35], [-13.319999999999993, 21.32], [-13.470000000000027, 20.97], [-14.0, 20.75], [-14.25, 20.85], [-14.5, 20.75], [-14.75, 20.85], [-15.0, 20.75], [-15.25, 20.85], [-15.5, 20.75], [-15.75, 20.85], [-16.0, 20.75], [-16.25, 20.85], [-16.5, 20.75], [-17.029999999999973, 20.97], [-17.25, 21.5], [-17.029999999999973, 22.03], [-16.680000000000007, 22.18], [-16.649999999999977, 22.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.304108352354888}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.502379811332568}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.977951134397927, 27.209579451298964, 28.14045641052644]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.47813647816821, 23.251664287607525, 24.209128360444595]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.2772109791047175, -5.093746450971612, -4.13618200392137]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.500746622041504, -6.304108352354888, -5.407723599573956]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.715445215059971, -2.126395847878281, -1.720366675543086]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.96651225962726, -2.703617133099758, -2.383599014935456]}}