{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:37.053742", "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": "2021-Mar-17_to_2021-Mar-21_345.5_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": 2021030000714}, "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": "March 17 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 21 2021"}, "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": 72334.39626515721}, "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", "Guinea-Bissau", "Senegal"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Western-Africa"]}, "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": 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": 343.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 346.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 11.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 14.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.15, 13.25], [-17.25, 13.5], [-17.15, 13.75], [-17.25, 14.0], [-17.03, 14.53], [-16.5, 14.75], [-15.97, 14.53], [-15.82, 14.18], [-15.5, 14.04], [-15.0, 14.25], [-14.75, 14.15], [-14.5, 14.25], [-13.97, 14.03], [-13.75, 13.5], [-13.85, 13.25], [-13.82, 13.18], [-13.47, 13.03], [-13.25, 12.5], [-13.47, 11.97], [-13.82, 11.82], [-13.97, 11.47], [-14.5, 11.25], [-14.75, 11.35], [-15.0, 11.25], [-15.25, 11.35], [-15.5, 11.25], [-15.75, 11.35], [-16.0, 11.25], [-16.53, 11.47], [-16.68, 11.82], [-17.03, 11.97], [-17.25, 12.5], [-17.15, 12.75], [-17.25, 13.0], [-17.15, 13.25]]]]}, "2021-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.15, 13.25], [-17.25, 13.5], [-17.15, 13.75], [-17.25, 14.0], [-17.03, 14.53], [-16.5, 14.75], [-15.97, 14.53], [-15.82, 14.18], [-15.75, 14.15], [-15.5, 14.25], [-15.25, 14.15], [-15.0, 14.25], [-14.75, 14.15], [-14.5, 14.25], [-14.25, 14.15], [-14.0, 14.25], [-13.47, 14.03], [-13.25, 13.5], [-13.35, 13.25], [-13.25, 13.0], [-13.35, 12.75], [-13.25, 12.5], [-13.47, 11.97], [-13.82, 11.82], [-13.97, 11.47], [-14.32, 11.32], [-14.47, 10.97], [-15.0, 10.75], [-15.53, 10.97], [-15.68, 11.32], [-15.75, 11.35], [-16.0, 11.25], [-16.53, 11.47], [-16.68, 11.82], [-17.03, 11.97], [-17.25, 12.5], [-17.15, 12.75], [-17.25, 13.0], [-17.15, 13.25]]]]}, "2021-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.15, 13.25], [-17.25, 13.5], [-17.15, 13.75], [-17.25, 14.0], [-17.03, 14.53], [-16.5, 14.75], [-15.97, 14.53], [-15.82, 14.18], [-15.75, 14.15], [-15.5, 14.25], [-15.25, 14.15], [-15.0, 14.25], [-14.75, 14.15], [-14.5, 14.25], [-14.25, 14.15], [-14.0, 14.25], [-13.47, 14.03], [-13.25, 13.5], [-13.35, 13.25], [-13.25, 13.0], [-13.35, 12.75], [-13.25, 12.5], [-13.47, 11.97], [-13.82, 11.82], [-13.97, 11.47], [-14.32, 11.32], [-14.47, 10.97], [-15.0, 10.75], [-15.53, 10.97], [-15.68, 11.32], [-15.75, 11.35], [-16.0, 11.25], [-16.53, 11.47], [-16.68, 11.82], [-17.03, 11.97], [-17.25, 12.5], [-17.15, 12.75], [-17.25, 13.0], [-17.15, 13.25]]]]}, "2021-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-17.03, 13.53], [-16.68, 13.68], [-16.53, 14.03], [-16.0, 14.25], [-15.75, 14.15], [-15.5, 14.25], [-15.25, 14.15], [-15.0, 14.25], [-14.75, 14.15], [-14.5, 14.25], [-14.25, 14.15], [-14.0, 14.25], [-13.47, 14.03], [-13.25, 13.5], [-13.35, 13.25], [-13.25, 13.0], [-13.35, 12.75], [-13.25, 12.5], [-13.47, 11.97], [-13.82, 11.82], [-13.97, 11.47], [-14.32, 11.32], [-14.47, 10.97], [-15.0, 10.75], [-15.53, 10.97], [-15.68, 11.32], [-15.75, 11.35], [-16.0, 11.25], [-16.53, 11.47], [-16.68, 11.82], [-17.03, 11.97], [-17.25, 12.5], [-17.15, 12.75], [-17.25, 13.0], [-17.03, 13.53]]]]}, "2021-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.25, 13.0], [-16.03, 13.53], [-15.68, 13.68], [-15.53, 14.03], [-15.0, 14.25], [-14.75, 14.15], [-14.5, 14.25], [-13.97, 14.03], [-13.75, 13.5], [-13.85, 13.25], [-13.75, 13.0], [-13.85, 12.75], [-13.75, 12.5], [-13.97, 11.97], [-14.32, 11.82], [-14.35, 11.75], [-14.25, 11.5], [-14.47, 10.97], [-15.0, 10.75], [-15.53, 10.97], [-15.68, 11.32], [-15.75, 11.35], [-16.0, 11.25], [-16.53, 11.47], [-16.75, 12.0], [-16.53, 12.53], [-16.18, 12.68], [-16.15, 12.75], [-16.25, 13.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.040034970981026}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.40319758452978}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.93191821056263, 26.637458458457957, 26.10138206327605, 27.294531384787263, 28.03636467358598]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.69184997183953, 22.442984579389986, 22.323589210230182, 24.343378734710484, 25.750114837652404]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0361299194774687, -2.544285049762171, -3.0848390759159705, -2.19314434341705, -1.7546167217531423]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.4167402763542327, -3.669491429361358, -4.040034970981026, -3.2873279290371897, -2.539418084647309]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6019025240988114, -2.0550099806434683, -2.5855950353247628, -1.8885927291411364, -1.6277483869531342]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1817088272417657, -2.5879543056431853, -3.3267040500489276, -2.313331429482421, -1.90791409183363]}}