{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:06.331382", "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-17_to_2011-Dec-20_344.5_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": 2011120000949}, "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 17 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 20 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 54329.21513264674}, "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", "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": 344.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "344.5\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": 347.25}, "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": 13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.53, 11.47], [-13.75, 12.0], [-13.53, 12.53], [-13.0, 12.75], [-12.47, 12.53], [-12.25, 12.0], [-12.47, 11.47], [-13.0, 11.25], [-13.53, 11.47]]], [[[-16.03, 11.97], [-16.25, 12.5], [-16.03, 13.03], [-15.5, 13.25], [-14.97, 13.03], [-14.75, 12.5], [-14.97, 11.97], [-15.5, 11.75], [-16.03, 11.97]]]]}, "2011-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.0, 14.25], [-15.75, 14.15], [-15.5, 14.25], [-14.97, 14.03], [-14.82, 13.68], [-14.75, 13.65], [-14.5, 13.75], [-13.97, 13.53], [-13.8, 13.12], [-13.5, 13.25], [-12.97, 13.03], [-12.82, 12.68], [-12.47, 12.53], [-12.25, 12.0], [-12.47, 11.47], [-13.0, 11.25], [-13.25, 11.35], [-13.5, 11.25], [-13.75, 11.35], [-13.82, 11.32], [-13.97, 10.97], [-14.5, 10.75], [-14.75, 10.85], [-15.0, 10.75], [-15.53, 10.97], [-15.7, 11.38], [-16.0, 11.25], [-16.53, 11.47], [-16.75, 12.0], [-16.62, 12.3], [-17.03, 12.47], [-17.25, 13.0], [-17.03, 13.53], [-16.68, 13.68], [-16.53, 14.03], [-16.0, 14.25]]]]}, "2011-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.0, 14.25], [-15.75, 14.15], [-15.5, 14.25], [-14.97, 14.03], [-14.82, 13.68], [-14.75, 13.65], [-14.5, 13.75], [-13.97, 13.53], [-13.8, 13.12], [-13.5, 13.25], [-12.97, 13.03], [-12.82, 12.68], [-12.47, 12.53], [-12.25, 12.0], [-12.47, 11.47], [-13.0, 11.25], [-13.25, 11.35], [-13.5, 11.25], [-13.75, 11.35], [-13.82, 11.32], [-13.97, 10.97], [-14.5, 10.75], [-14.75, 10.85], [-15.0, 10.75], [-15.53, 10.97], [-15.7, 11.38], [-16.0, 11.25], [-16.53, 11.47], [-16.75, 12.0], [-16.62, 12.3], [-17.03, 12.47], [-17.25, 13.0], [-17.03, 13.53], [-16.68, 13.68], [-16.53, 14.03], [-16.0, 14.25]]]]}, "2011-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.0, 14.25], [-15.75, 14.15], [-15.5, 14.25], [-14.97, 14.03], [-14.82, 13.68], [-14.75, 13.65], [-14.5, 13.75], [-13.97, 13.53], [-13.8, 13.12], [-13.5, 13.25], [-12.97, 13.03], [-12.75, 12.5], [-12.85, 12.25], [-12.75, 12.0], [-12.97, 11.47], [-13.5, 11.25], [-13.75, 11.35], [-13.82, 11.32], [-13.97, 10.97], [-14.5, 10.75], [-14.75, 10.85], [-15.0, 10.75], [-15.53, 10.97], [-15.7, 11.38], [-16.0, 11.25], [-16.53, 11.47], [-16.75, 12.0], [-16.62, 12.3], [-17.03, 12.47], [-17.25, 13.0], [-17.03, 13.53], [-16.68, 13.68], [-16.53, 14.03], [-16.0, 14.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.791920714258481}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0482541070908145}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.54419576300012, 23.784025028629117, 23.617203707320698, 23.65247850054311]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.403342675385886, 22.635955343653507, 22.59334199268278, 22.93938461147792]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9408370077128723, -1.95480481004809, -2.130384104078009, -2.0728765541352514]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.1801311029689145, -2.459752392889527, -2.5237524054031724, -2.791920714258481]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5594981138960669, -1.6271297565330622, -1.8096837882424417, -1.7157800825187173]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7768560941125795, -1.963388201271683, -2.0291741177190836, -2.0964426860083356]}}