{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:17:47.111431", "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": "2018-Aug-21_to_2018-Aug-26_13.0_14.0"}, "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": 2018080000827}, "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": "August 21 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 26 2018"}, "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": 80801.44748705215}, "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": ["Cameroon", "Chad", "Niger", "Nigeria"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Sahara", "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": 14.0}, "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": 13.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "13.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 12.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 12.75}, "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": {"2018-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.0, 15.25], [16.53, 15.03], [16.75, 14.5], [16.53, 13.97], [16.0, 13.75], [15.47, 13.97], [15.25, 14.5], [15.47, 15.03], [16.0, 15.25]]]]}, "2018-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[13.53, 15.03], [13.75, 14.5], [13.65, 14.25], [13.75, 14.0], [13.53, 13.47], [13.0, 13.25], [12.75, 13.35], [12.5, 13.25], [11.97, 13.47], [11.75, 14.0], [11.97, 14.53], [12.32, 14.68], [12.47, 15.03], [13.0, 15.25], [13.53, 15.03]]], [[[15.75, 15.15], [16.0, 15.25], [16.53, 15.03], [16.75, 14.5], [16.53, 13.97], [16.0, 13.75], [15.75, 13.85], [15.68, 13.82], [15.53, 13.47], [15.0, 13.25], [14.47, 13.47], [14.25, 14.0], [14.47, 14.53], [14.82, 14.68], [14.97, 15.03], [15.5, 15.25], [15.75, 15.15]]]]}, "2018-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.97, 14.53], [12.32, 14.68], [12.47, 15.03], [13.0, 15.25], [13.25, 15.15], [13.32, 15.18], [13.47, 15.53], [14.0, 15.75], [14.25, 15.65], [14.5, 15.75], [15.0, 15.54], [15.32, 15.68], [15.35, 15.75], [15.25, 16.0], [15.47, 16.53], [16.0, 16.75], [16.53, 16.53], [16.75, 16.0], [16.65, 15.75], [16.75, 15.5], [16.54, 15.0], [16.75, 14.5], [16.53, 13.97], [16.0, 13.75], [15.75, 13.85], [15.68, 13.82], [15.53, 13.47], [15.18, 13.32], [15.15, 13.25], [15.25, 13.0], [15.03, 12.47], [14.5, 12.25], [13.97, 12.47], [13.75, 13.0], [13.85, 13.25], [13.82, 13.32], [13.75, 13.35], [13.68, 13.32], [13.53, 12.97], [13.0, 12.75], [12.75, 12.85], [12.5, 12.75], [11.97, 12.97], [11.75, 13.5], [11.85, 13.75], [11.75, 14.0], [11.97, 14.53]]]]}, "2018-08-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.85, 14.25], [11.75, 14.5], [11.97, 15.03], [12.32, 15.18], [12.35, 15.25], [12.25, 15.5], [12.47, 16.03], [13.0, 16.25], [13.25, 16.15], [13.5, 16.25], [14.03, 16.03], [14.18, 15.68], [14.25, 15.65], [14.5, 15.75], [15.0, 15.54], [15.32, 15.68], [15.35, 15.75], [15.25, 16.0], [15.47, 16.53], [16.0, 16.75], [16.53, 16.53], [16.75, 16.0], [16.65, 15.75], [16.75, 15.5], [16.53, 14.97], [16.18, 14.82], [16.15, 14.75], [16.25, 14.5], [16.03, 13.97], [15.68, 13.82], [15.53, 13.47], [15.18, 13.32], [15.15, 13.25], [15.25, 13.0], [15.03, 12.47], [14.5, 12.25], [13.97, 12.47], [13.75, 13.0], [13.85, 13.25], [13.82, 13.32], [13.75, 13.35], [13.68, 13.32], [13.53, 12.97], [13.0, 12.75], [12.75, 12.85], [12.5, 12.75], [11.97, 12.97], [11.75, 13.5], [11.85, 13.75], [11.75, 14.0], [11.85, 14.25]]]]}, "2018-08-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.85, 14.25], [11.75, 14.5], [11.97, 15.03], [12.32, 15.18], [12.35, 15.25], [12.25, 15.5], [12.47, 16.03], [13.0, 16.25], [13.25, 16.15], [13.5, 16.25], [14.03, 16.03], [14.18, 15.68], [14.25, 15.65], [14.5, 15.75], [15.0, 15.54], [15.32, 15.68], [15.35, 15.75], [15.25, 16.0], [15.47, 16.53], [16.0, 16.75], [16.53, 16.53], [16.75, 16.0], [16.65, 15.75], [16.75, 15.5], [16.53, 14.97], [16.18, 14.82], [16.03, 14.47], [15.68, 14.32], [15.53, 13.97], [15.18, 13.82], [15.15, 13.75], [15.25, 13.5], [15.15, 13.25], [15.25, 13.0], [15.03, 12.47], [14.5, 12.25], [13.97, 12.47], [13.75, 13.0], [13.85, 13.25], [13.82, 13.32], [13.75, 13.35], [13.68, 13.32], [13.53, 12.97], [13.0, 12.75], [12.75, 12.85], [12.5, 12.75], [11.97, 12.97], [11.75, 13.5], [11.85, 13.75], [11.75, 14.0], [11.85, 14.25]]]]}, "2018-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[11.85, 14.25], [11.75, 14.5], [11.97, 15.03], [12.32, 15.18], [12.35, 15.25], [12.25, 15.5], [12.47, 16.03], [13.0, 16.25], [13.25, 16.15], [13.5, 16.25], [14.03, 16.03], [14.18, 15.68], [14.25, 15.65], [14.5, 15.75], [15.0, 15.54], [15.32, 15.68], [15.47, 16.03], [16.0, 16.25], [16.53, 16.03], [16.75, 15.5], [16.53, 14.97], [16.18, 14.82], [16.03, 14.47], [15.68, 14.32], [15.53, 13.97], [15.18, 13.82], [15.15, 13.75], [15.25, 13.5], [15.03, 12.97], [14.5, 12.75], [13.97, 12.97], [13.82, 13.32], [13.75, 13.35], [13.68, 13.32], [13.53, 12.97], [13.0, 12.75], [12.75, 12.85], [12.5, 12.75], [11.97, 12.97], [11.75, 13.5], [11.85, 13.75], [11.75, 14.0], [11.85, 14.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.529916151205043}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.933271316406028}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.952471905829555, 26.76334379141059, 26.56200669805054, 26.736840180018362, 26.903143439522296, 25.8718549162283]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.952471905829555, 26.49669261366944, 25.82234135130932, 25.999832723851398, 25.58016460221313, 24.908877819920235]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.159323289325698, -2.2418952755159105, -2.7598121009693117, -2.7811835079632465, -2.729504259954029, -3.7324985612418944]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.159323289325698, -2.420189412821287, -3.789983763296334, -3.6366961465903955, -3.5470982159529854, -4.529916151205043]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3604690930150953, -1.3977030812377687, -1.5879398863521452, -1.5586447432832211, -1.5632631462556474, -2.205553933741833]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3604690930150953, -1.4937805248607954, -2.0087033372298815, -1.8127073715706117, -1.8788012514785342, -2.56665955268725]}}