{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:31.587182", "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-Jan-12_to_2011-Jan-17_345.0_13.0"}, "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": 2011010000681}, "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": "January 12 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 17 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 60515.438232228385}, "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": ["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": 13.0}, "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": 345.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "345.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 344.25}, "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": 10.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 13.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.0, 11.25], [-12.47, 11.03], [-12.25, 10.5], [-12.47, 9.97], [-13.0, 9.75], [-13.53, 9.97], [-13.75, 10.5], [-13.53, 11.03], [-13.0, 11.25]]]]}, "2011-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.25, 13.0], [-16.03, 13.53], [-15.5, 13.75], [-15.25, 13.65], [-15.0, 13.75], [-14.75, 13.65], [-14.5, 13.75], [-13.97, 13.53], [-13.75, 13.0], [-13.85, 12.75], [-13.82, 12.68], [-13.75, 12.65], [-13.5, 12.75], [-13.25, 12.65], [-13.0, 12.75], [-12.47, 12.53], [-12.32, 12.18], [-11.97, 12.03], [-11.75, 11.5], [-11.97, 10.97], [-12.32, 10.82], [-12.35, 10.75], [-12.25, 10.5], [-12.47, 9.97], [-13.0, 9.75], [-13.5, 9.96], [-14.0, 9.75], [-14.53, 9.97], [-14.68, 10.32], [-14.75, 10.35], [-15.0, 10.25], [-15.53, 10.47], [-15.75, 11.0], [-15.65, 11.25], [-15.75, 11.5], [-15.65, 11.75], [-15.75, 12.0], [-15.65, 12.25], [-15.68, 12.32], [-16.03, 12.47], [-16.25, 13.0]]]]}, "2011-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.25, 13.0], [-16.03, 13.53], [-15.5, 13.75], [-15.25, 13.65], [-15.0, 13.75], [-14.75, 13.65], [-14.5, 13.75], [-13.97, 13.53], [-13.75, 13.0], [-13.85, 12.75], [-13.82, 12.68], [-13.75, 12.65], [-13.5, 12.75], [-13.25, 12.65], [-13.0, 12.75], [-12.47, 12.53], [-12.32, 12.18], [-11.97, 12.03], [-11.75, 11.5], [-11.97, 10.97], [-12.32, 10.82], [-12.35, 10.75], [-12.25, 10.5], [-12.47, 9.97], [-13.0, 9.75], [-13.5, 9.96], [-14.0, 9.75], [-14.53, 9.97], [-14.68, 10.32], [-14.75, 10.35], [-15.0, 10.25], [-15.53, 10.47], [-15.75, 11.0], [-15.65, 11.25], [-15.75, 11.5], [-15.65, 11.75], [-15.75, 12.0], [-15.65, 12.25], [-15.68, 12.32], [-16.03, 12.47], [-16.25, 13.0]]]]}, "2011-01-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.25, 13.0], [-16.03, 13.53], [-15.5, 13.75], [-15.25, 13.65], [-15.0, 13.75], [-14.75, 13.65], [-14.5, 13.75], [-13.97, 13.53], [-13.75, 13.0], [-13.85, 12.75], [-13.82, 12.68], [-13.75, 12.65], [-13.5, 12.75], [-13.25, 12.65], [-13.0, 12.75], [-12.47, 12.53], [-12.32, 12.18], [-11.97, 12.03], [-11.75, 11.5], [-11.97, 10.97], [-12.32, 10.82], [-12.47, 10.47], [-13.0, 10.25], [-13.3, 10.38], [-13.47, 9.97], [-14.0, 9.75], [-14.53, 9.97], [-14.68, 10.32], [-14.75, 10.35], [-15.0, 10.25], [-15.53, 10.47], [-15.75, 11.0], [-15.65, 11.25], [-15.75, 11.5], [-15.65, 11.75], [-15.75, 12.0], [-15.65, 12.25], [-15.68, 12.32], [-16.03, 12.47], [-16.25, 13.0]]]]}, "2011-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.0, 13.75], [-14.47, 13.53], [-14.25, 13.0], [-14.47, 12.47], [-15.0, 12.25], [-15.53, 12.47], [-15.75, 13.0], [-15.53, 13.53], [-15.0, 13.75]]]]}, "2011-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-15.0, 13.75], [-14.47, 13.53], [-14.25, 13.0], [-14.47, 12.47], [-15.0, 12.25], [-15.53, 12.47], [-15.75, 13.0], [-15.53, 13.53], [-15.0, 13.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.9237441199157956}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.944797945090527}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.178929951067573, 23.676743466710775, 23.561980126533626, 23.989030430455614, 23.705111398150166, 23.61565010465813]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.178929951067573, 22.359860990161508, 22.480524968845543, 22.540890948040783, 23.705111398150166, 23.61565010465813]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1992220175486636, -1.9793744449170532, -2.1118494522955134, -1.744968664843001, -2.163658592019715, -2.23570940977595]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1992220175486636, 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