{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:07.845020", "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-Feb-24_to_2018-Feb-26_357.5_9.5"}, "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": 2018020000915}, "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": "February 24 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 26 2018"}, "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": 61189.32691024694}, "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": ["C\u00f4te d'Ivoire", "Ghana"]}, "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": 9.5}, "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": 357.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "357.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 356.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 359.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 9.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.03, 8.53], [-3.62, 8.7], [-3.75, 9.0], [-3.65, 9.25], [-3.75, 9.5], [-3.53, 10.03], [-3.0, 10.25], [-2.75, 10.15], [-2.5, 10.25], [-1.97, 10.03], [-1.75, 9.5], [-1.85, 9.25], [-1.82, 9.18], [-1.75, 9.15], [-1.5, 9.25], [-1.25, 9.15], [-1.0, 9.25], [-0.47, 9.03], [-0.32, 8.68], [0.03, 8.53], [0.25, 8.0], [0.15, 7.75], [0.25, 7.5], [0.03, 6.97], [-0.5, 6.75], [-0.75, 6.85], [-1.0, 6.75], [-1.25, 6.85], [-1.5, 6.75], [-1.75, 6.85], [-2.0, 6.75], [-2.25, 6.85], [-2.5, 6.75], [-2.75, 6.85], [-3.0, 6.75], [-3.25, 6.85], [-3.5, 6.75], [-4.03, 6.97], [-4.25, 7.5], [-4.15, 7.75], [-4.25, 8.0], [-4.03, 8.53]]]]}, "2018-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.03, 8.53], [-3.62, 8.7], [-3.75, 9.0], [-3.65, 9.25], [-3.75, 9.5], [-3.53, 10.03], [-3.0, 10.25], [-2.75, 10.15], [-2.5, 10.25], [-1.97, 10.03], [-1.75, 9.5], [-1.85, 9.25], [-1.82, 9.18], [-1.75, 9.15], [-1.5, 9.25], [-1.25, 9.15], [-1.0, 9.25], [-0.47, 9.03], [-0.32, 8.68], [0.03, 8.53], [0.25, 8.0], [0.15, 7.75], [0.25, 7.5], [0.03, 6.97], [-0.5, 6.75], [-0.75, 6.85], [-1.0, 6.75], [-1.25, 6.85], [-1.5, 6.75], [-1.75, 6.85], [-2.0, 6.75], [-2.25, 6.85], [-2.5, 6.75], [-2.75, 6.85], [-3.0, 6.75], [-3.25, 6.85], [-3.5, 6.75], [-4.03, 6.97], [-4.25, 7.5], [-4.15, 7.75], [-4.25, 8.0], [-4.03, 8.53]]]]}, "2018-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-4.03, 8.53], [-3.62, 8.7], [-3.75, 9.0], [-3.65, 9.25], [-3.75, 9.5], [-3.53, 10.03], [-3.0, 10.25], [-2.75, 10.15], [-2.5, 10.25], [-1.97, 10.03], [-1.75, 9.5], [-1.85, 9.25], [-1.82, 9.18], [-1.75, 9.15], [-1.5, 9.25], [-1.25, 9.15], [-1.0, 9.25], [-0.47, 9.03], [-0.32, 8.68], [0.03, 8.53], [0.25, 8.0], [0.15, 7.75], [0.25, 7.5], [0.03, 6.97], [-0.5, 6.75], [-0.75, 6.85], [-1.0, 6.75], [-1.25, 6.85], [-1.5, 6.75], [-1.75, 6.85], [-2.0, 6.75], [-2.25, 6.85], [-2.5, 6.75], [-2.75, 6.85], [-3.0, 6.75], [-3.25, 6.85], [-3.5, 6.75], [-4.03, 6.97], [-4.25, 7.5], [-4.15, 7.75], [-4.25, 8.0], [-4.03, 8.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.571505181075622}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5701353010762102}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.98223813205641, 28.10501448310049, 27.62565852747275]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.63878970597284, 26.9403884595053, 25.849645561256807]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.141998907252474, -2.058281304605859, -2.510125691370297]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.571505181075622, -2.792818977167599, -3.7379494864756566]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.407854302828976, -1.6066512569987537, -1.980505915782405]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-4.155092612058168, -2.07785465175636, -3.173945086675454]}}