{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:06.970797", "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-Dec-21_to_2011-Dec-23_353.5_20.0"}, "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": 2011120001112}, "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 21 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 23 2011"}, "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": 157329.82675595093}, "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": ["Mali", "Mauritania"]}, "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": 20.0}, "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": 353.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "353.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 16.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.53, 19.53], [-10.18, 19.68], [-10.15, 19.75], [-10.25, 20.0], [-10.03, 20.53], [-9.68, 20.68], [-9.53, 21.03], [-9.18, 21.18], [-9.03, 21.53], [-8.68, 21.68], [-8.53, 22.03], [-8.0, 22.25], [-7.75, 22.15], [-7.5, 22.25], [-7.25, 22.15], [-7.0, 22.25], [-6.75, 22.15], [-6.5, 22.25], [-5.97, 22.03], [-5.82, 21.68], [-5.47, 21.53], [-5.25, 21.0], [-5.35, 20.75], [-5.25, 20.5], [-5.35, 20.25], [-5.25, 20.0], [-5.47, 19.47], [-5.82, 19.32], [-5.97, 18.97], [-6.32, 18.82], [-6.47, 18.47], [-6.82, 18.32], [-6.97, 17.97], [-7.32, 17.82], [-7.47, 17.47], [-7.82, 17.32], [-7.85, 17.25], [-7.75, 17.0], [-7.97, 16.47], [-8.32, 16.32], [-8.47, 15.97], [-9.0, 15.75], [-9.25, 15.85], [-9.5, 15.75], [-10.03, 15.97], [-10.25, 16.5], [-10.03, 17.03], [-9.68, 17.18], [-9.65, 17.25], [-9.68, 17.32], [-10.03, 17.47], [-10.18, 17.82], [-10.53, 17.97], [-10.75, 18.5], [-10.65, 18.75], [-10.75, 19.0], [-10.53, 19.53]]]]}, "2011-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.53, 19.53], [-10.18, 19.68], [-10.15, 19.75], [-10.25, 20.0], [-10.03, 20.53], [-9.68, 20.68], [-9.53, 21.03], [-9.18, 21.18], [-9.03, 21.53], [-8.68, 21.68], [-8.53, 22.03], [-8.0, 22.25], [-7.75, 22.15], [-7.5, 22.25], [-7.25, 22.15], [-7.0, 22.25], [-6.75, 22.15], [-6.5, 22.25], [-5.97, 22.03], [-5.82, 21.68], [-5.47, 21.53], [-5.25, 21.0], [-5.35, 20.75], [-5.25, 20.5], [-5.35, 20.25], [-5.25, 20.0], [-5.47, 19.47], [-5.82, 19.32], [-5.97, 18.97], [-6.32, 18.82], [-6.47, 18.47], [-6.82, 18.32], [-6.97, 17.97], [-7.32, 17.82], [-7.47, 17.47], [-7.82, 17.32], [-7.85, 17.25], [-7.75, 17.0], [-7.97, 16.47], [-8.32, 16.32], [-8.47, 15.97], [-9.0, 15.75], [-9.25, 15.85], [-9.5, 15.75], [-10.03, 15.97], [-10.25, 16.5], [-10.03, 17.03], [-9.68, 17.18], [-9.65, 17.25], [-9.68, 17.32], [-10.03, 17.47], [-10.18, 17.82], [-10.53, 17.97], [-10.75, 18.5], [-10.65, 18.75], [-10.75, 19.0], [-10.53, 19.53]]]]}, "2011-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.53, 19.53], [-10.18, 19.68], [-10.15, 19.75], [-10.25, 20.0], [-10.03, 20.53], [-9.68, 20.68], [-9.53, 21.03], [-9.18, 21.18], [-9.03, 21.53], [-8.68, 21.68], [-8.53, 22.03], [-8.0, 22.25], [-7.75, 22.15], [-7.5, 22.25], [-7.25, 22.15], [-7.0, 22.25], [-6.75, 22.15], [-6.5, 22.25], [-5.97, 22.03], [-5.82, 21.68], [-5.47, 21.53], [-5.25, 21.0], [-5.35, 20.75], [-5.25, 20.5], [-5.35, 20.25], [-5.25, 20.0], [-5.47, 19.47], [-5.82, 19.32], [-5.97, 18.97], [-6.32, 18.82], [-6.47, 18.47], [-6.82, 18.32], [-6.97, 17.97], [-7.32, 17.82], [-7.47, 17.47], [-7.82, 17.32], [-7.85, 17.25], [-7.75, 17.0], [-7.97, 16.47], [-8.32, 16.32], [-8.47, 15.97], [-9.0, 15.75], [-9.25, 15.85], [-9.5, 15.75], [-10.03, 15.97], [-10.25, 16.5], [-10.03, 17.03], [-9.68, 17.18], [-9.65, 17.25], [-9.68, 17.32], [-10.03, 17.47], [-10.18, 17.82], [-10.53, 17.97], [-10.75, 18.5], [-10.65, 18.75], [-10.75, 19.0], [-10.53, 19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.524358952237776}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.227936084346466}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.674074329210669, 13.576055667484297, 15.201176135825676]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.089246072020558, 12.138635211684345, 13.536061631547966]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.006063704848278, -5.131101238141134, -3.5466433100499812]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.367004853722733, -5.524358952237776, -3.7404025109959207]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4564265776401526, -1.908849767621766, -1.363111188546228]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6226635933842841, -2.0276867417520195, -1.4361525026383584]}}