{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:26.793716", "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-May-18_to_2011-May-21_18.0_-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": 2011050000943}, "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": "May 18 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 21 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": 58850.446524382125}, "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": ["Angola", "Namibia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-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": -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": 18.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 16.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 19.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.85, -16.75], [15.75, -16.5], [15.97, -15.97], [16.5, -15.75], [17.03, -15.97], [17.25, -16.5], [17.15, -16.75], [17.25, -17.0], [17.15, -17.25], [17.18, -17.32], [17.5, -17.46], [18.0, -17.25], [18.3, -17.37], [18.47, -16.97], [19.0, -16.75], [19.53, -16.97], [19.68, -17.32], [20.03, -17.47], [20.25, -18.0], [20.03, -18.53], [19.68, -18.68], [19.53, -19.03], [19.18, -19.18], [19.03, -19.53], [18.5, -19.75], [17.97, -19.53], [17.82, -19.18], [17.75, -19.15], [17.5, -19.25], [16.97, -19.03], [16.82, -18.68], [16.47, -18.53], [16.32, -18.18], [15.97, -18.03], [15.75, -17.5], [15.85, -17.25], [15.75, -17.0], [15.85, -16.75]]]]}, "2011-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.85, -17.25], [15.75, -17.0], [15.85, -16.75], [15.75, -16.5], [15.97, -15.97], [16.5, -15.75], [17.03, -15.97], [17.18, -16.32], [17.25, -16.35], [17.5, -16.25], [18.03, -16.47], [18.25, -17.0], [18.15, -17.25], [18.18, -17.32], [18.25, -17.35], [18.32, -17.32], [18.47, -16.97], [19.0, -16.75], [19.53, -16.97], [19.68, -17.32], [20.03, -17.47], [20.25, -18.0], [20.03, -18.53], [19.68, -18.68], [19.53, -19.03], [19.18, -19.18], [19.03, -19.53], [18.5, -19.75], [17.97, -19.53], [17.82, -19.18], [17.75, -19.15], [17.5, -19.25], [16.97, -19.03], [16.82, -18.68], [16.75, -18.65], [16.5, -18.75], [15.97, -18.53], [15.75, -18.0], [15.85, -17.75], [15.75, -17.5], [15.85, -17.25]]]]}, "2011-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.85, -17.25], [15.75, -17.0], [15.85, -16.75], [15.75, -16.5], [15.97, -15.97], [16.5, -15.75], [17.03, -15.97], [17.18, -16.32], [17.25, -16.35], [17.5, -16.25], [18.03, -16.47], [18.25, -17.0], [18.15, -17.25], [18.18, -17.32], [18.25, -17.35], [18.32, -17.32], [18.47, -16.97], [19.0, -16.75], [19.53, -16.97], [19.68, -17.32], [20.03, -17.47], [20.25, -18.0], [20.03, -18.53], [19.68, -18.68], [19.53, -19.03], [19.18, -19.18], [19.03, -19.53], [18.5, -19.75], [17.97, -19.53], [17.82, -19.18], [17.75, -19.15], [17.5, -19.25], [16.97, -19.03], [16.82, -18.68], [16.75, -18.65], [16.5, -18.75], [15.97, -18.53], [15.75, -18.0], [15.85, -17.75], [15.75, -17.5], [15.85, -17.25]]]]}, "2011-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.85, -17.25], [15.75, -17.0], [15.85, -16.75], [15.75, -16.5], [15.97, -15.97], [16.5, -15.75], [17.03, -15.97], [17.18, -16.32], [17.25, -16.35], [17.5, -16.25], [18.03, -16.47], [18.25, -17.0], [18.15, -17.25], [18.18, -17.32], [18.25, -17.35], [18.5, -17.25], [19.03, -17.47], [19.25, -18.0], [19.15, -18.25], [19.25, -18.5], [19.15, -18.75], [19.25, -19.0], [19.03, -19.53], [18.5, -19.75], [17.97, -19.53], [17.82, -19.18], [17.75, -19.15], [17.5, -19.25], [16.97, -19.03], [16.82, -18.68], [16.75, -18.65], [16.5, -18.75], [15.97, -18.53], [15.75, -18.0], [15.85, -17.75], [15.75, -17.5], [15.85, -17.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.861015551258106}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.198567459498389}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.283272417154876, 17.93525622758375, 18.32304960058019, 18.346432802597235]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.98340415145657, 16.502757258942097, 17.260264478906095, 17.128024281851935]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2353676931360402, -2.5626176914572367, -2.011275555955541, -1.947719359147797]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.545689331025528, -2.861015551258106, -2.4728359494964707, -2.311731305961814]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3315565089453563, -1.48997217455301, -1.1467010515536826, -1.1027134677905095]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5159260799584713, -1.6276220343803356, -1.3965824571034815, -1.3009679855499416]}}