{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:25.693804", "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": "2011-Sep-30_to_2011-Oct-04_346.5_16.0"}, "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": 2011090001377}, "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": "September 30 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 04 2011"}, "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": 65222.78633869034}, "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", "Senegal"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Sahara"]}, "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": 16.0}, "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": 346.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "346.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 344.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 347.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 17.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.53, 17.03], [-15.18, 17.18], [-15.03, 17.53], [-14.5, 17.75], [-14.25, 17.65], [-14.0, 17.75], [-13.5, 17.54], [-13.0, 17.75], [-12.75, 17.65], [-12.5, 17.75], [-11.97, 17.53], [-11.75, 17.0], [-11.85, 16.75], [-11.75, 16.5], [-11.85, 16.25], [-11.75, 16.0], [-11.97, 15.47], [-12.32, 15.32], [-12.47, 14.97], [-13.0, 14.75], [-13.25, 14.85], [-13.5, 14.75], [-13.75, 14.85], [-14.0, 14.75], [-14.53, 14.97], [-14.68, 15.32], [-14.75, 15.35], [-15.0, 15.25], [-15.53, 15.47], [-15.75, 16.0], [-15.65, 16.25], [-15.75, 16.5], [-15.53, 17.03]]]]}, "2011-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.53, 17.03], [-15.18, 17.18], [-15.03, 17.53], [-14.5, 17.75], [-14.25, 17.65], [-14.0, 17.75], [-13.75, 17.65], [-13.5, 17.75], [-13.25, 17.65], [-13.0, 17.75], [-12.75, 17.65], [-12.5, 17.75], [-11.97, 17.53], [-11.75, 17.0], [-11.85, 16.75], [-11.75, 16.5], [-11.85, 16.25], [-11.75, 16.0], [-11.97, 15.47], [-12.32, 15.32], [-12.47, 14.97], [-13.0, 14.75], [-13.25, 14.85], [-13.5, 14.75], [-13.75, 14.85], [-14.0, 14.75], [-14.53, 14.97], [-14.68, 15.32], [-14.75, 15.35], [-15.0, 15.25], [-15.53, 15.47], [-15.75, 16.0], [-15.65, 16.25], [-15.75, 16.5], [-15.53, 17.03]]]]}, "2011-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.53, 17.03], [-15.18, 17.18], [-15.03, 17.53], [-14.5, 17.75], [-14.25, 17.65], [-14.18, 17.68], [-14.03, 18.03], [-13.5, 18.25], [-13.25, 18.15], [-13.0, 18.25], [-12.47, 18.03], [-12.32, 17.68], [-11.97, 17.53], [-11.75, 17.0], [-11.85, 16.75], [-11.75, 16.5], [-11.85, 16.25], [-11.75, 16.0], [-11.97, 15.47], [-12.32, 15.32], [-12.47, 14.97], [-13.0, 14.75], [-13.25, 14.85], [-13.5, 14.75], [-13.75, 14.85], [-14.0, 14.75], [-14.53, 14.97], [-14.68, 15.32], [-14.75, 15.35], [-15.0, 15.25], [-15.53, 15.47], [-15.75, 16.0], [-15.65, 16.25], [-15.75, 16.5], [-15.53, 17.03]]]]}, "2011-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.65, 16.75], [-14.75, 17.0], [-14.53, 17.53], [-14.18, 17.68], [-14.03, 18.03], [-13.5, 18.25], [-13.25, 18.15], [-13.0, 18.25], [-12.47, 18.03], [-12.25, 17.5], [-12.46, 17.0], [-12.25, 16.5], [-12.35, 16.25], [-12.25, 16.0], [-12.47, 15.47], [-13.0, 15.25], [-13.25, 15.35], [-13.5, 15.25], [-13.75, 15.35], [-14.0, 15.25], [-14.53, 15.47], [-14.75, 16.0], [-14.65, 16.25], [-14.75, 16.5], [-14.65, 16.75]]]]}, "2011-10-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-14.03, 16.97], [-14.25, 17.5], [-14.03, 18.03], [-13.5, 18.25], [-13.25, 18.15], [-13.0, 18.25], [-12.47, 18.03], [-12.25, 17.5], [-12.47, 16.97], [-13.0, 16.75], [-13.25, 16.85], [-13.5, 16.75], [-14.03, 16.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.92517522031244}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6872517022202476}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.323810152456645, 28.505082611249975, 29.274886282852435, 29.801011617732115, 30.287982969640268]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [27.180824697688763, 27.29700093614946, 28.637694007882487, 29.352325946641656, 30.269530718434964]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9468344973481186, -3.9498458287385576, -3.395586790965232, -3.3943699287650473, -3.2679967744035423]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.92517522031244, -4.85526032151671, -4.628772418516746, -4.096880208500693, -3.3618756653812056]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1310991808799056, -2.1772442666665723, -1.8568949081575439, -1.808629473170153, -1.803964291221626]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4659463858512414, -2.5142682234760163, -2.446848948404512, -2.2377504956247276, -1.8196776402322907]}}