{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:55:16.359031", "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": "2013-Dec-13_to_2013-Dec-17_9.0_18.0"}, "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": 2013120000563}, "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": "December 13 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 17 2013"}, "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": 56145.31267110021}, "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": ["Niger"]}, "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": 18.0}, "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": 9.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "9.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 9.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 15.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 18.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[8.25, 18.0], [8.47, 18.53], [9.0, 18.75], [9.53, 18.53], [9.75, 18.0], [9.65, 17.75], [9.75, 17.5], [9.53, 16.97], [9.18, 16.82], [9.03, 16.47], [8.5, 16.25], [7.97, 16.47], [7.75, 17.0], [7.97, 17.53], [8.32, 17.68], [8.35, 17.75], [8.25, 18.0]]]]}, "2013-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.85, 16.75], [5.75, 17.0], [5.97, 17.53], [6.5, 17.75], [6.75, 17.65], [7.0, 17.75], [7.25, 17.65], [7.32, 17.68], [7.35, 17.75], [7.25, 18.0], [7.47, 18.53], [8.0, 18.75], [8.25, 18.65], [8.5, 18.75], [8.75, 18.65], [9.0, 18.75], [9.53, 18.53], [9.75, 18.0], [9.65, 17.75], [9.75, 17.5], [9.65, 17.25], [9.75, 17.0], [9.53, 16.47], [9.0, 16.25], [8.75, 16.35], [8.68, 16.32], [8.53, 15.97], [8.0, 15.75], [7.75, 15.85], [7.68, 15.82], [7.53, 15.47], [7.0, 15.25], [6.75, 15.35], [6.5, 15.25], [5.97, 15.47], [5.75, 16.0], [5.85, 16.25], [5.75, 16.5], [5.85, 16.75]]]]}, "2013-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.85, 16.75], [5.75, 17.0], [5.97, 17.53], [6.5, 17.75], [6.75, 17.65], [6.82, 17.68], [6.97, 18.03], [7.32, 18.18], [7.47, 18.53], [8.0, 18.75], [8.25, 18.65], [8.5, 18.75], [8.75, 18.65], [9.0, 18.75], [9.53, 18.53], [9.75, 18.0], [9.65, 17.75], [9.75, 17.5], [9.65, 17.25], [9.75, 17.0], [9.53, 16.47], [9.0, 16.25], [8.75, 16.35], [8.68, 16.32], [8.53, 15.97], [8.0, 15.75], [7.75, 15.85], [7.68, 15.82], [7.53, 15.47], [7.0, 15.25], [6.75, 15.35], [6.5, 15.25], [5.97, 15.47], [5.75, 16.0], [5.85, 16.25], [5.75, 16.5], [5.85, 16.75]]]]}, "2013-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.85, 16.75], [5.75, 17.0], [5.97, 17.53], [6.5, 17.75], [6.75, 17.65], [6.82, 17.68], [6.97, 18.03], [7.32, 18.18], [7.47, 18.53], [8.0, 18.75], [8.25, 18.65], [8.5, 18.75], [8.75, 18.65], [9.0, 18.75], [9.53, 18.53], [9.75, 18.0], [9.65, 17.75], [9.75, 17.5], [9.65, 17.25], [9.75, 17.0], [9.53, 16.47], [9.0, 16.25], [8.75, 16.35], [8.68, 16.32], [8.53, 15.97], [8.0, 15.75], [7.75, 15.85], [7.68, 15.82], [7.53, 15.47], [7.0, 15.25], [6.75, 15.35], [6.5, 15.25], [5.97, 15.47], [5.75, 16.0], [5.85, 16.25], [5.75, 16.5], [5.85, 16.75]]]]}, "2013-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[7.5, 18.25], [8.03, 18.03], [8.25, 17.5], [8.03, 16.97], [7.5, 16.75], [6.97, 16.97], [6.75, 17.5], [6.97, 18.03], [7.5, 18.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.57557012701659}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.14960370974714}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.66902827529708, 16.914161563408186, 16.41258522609661, 17.26422797269771, 19.24356233832566]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.276980425326485, 11.61516937747848, 11.66084721497782, 12.526008749030382, 19.24356233832566]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.099893855871282, -4.180094846926888, -4.653649217423507, -3.669728957596748, -3.2906484471457134]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.88467026241517, -5.3842507875770025, -5.57557012701659, -4.327192348872529, -3.2906484471457134]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3457620286392509, -1.5379848921311898, -1.7712121930077114, -1.4485437130242034, -1.3493363366517965]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5004603664540266, -1.6959590760951304, -2.122411903907535, -1.6968174752899932, -1.3493363366517965]}}