{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:10:37.168404", "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-Apr-07_to_2018-Apr-11_349.5_10.5"}, "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": 2018040000411}, "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": "April 07 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 11 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 124700.17063110025}, "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", "Sierra Leone"]}, "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": 10.5}, "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": 349.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "349.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 347.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 351.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 7.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 12.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-12.75, 9.5], [-12.65, 9.75], [-12.75, 10.0], [-12.62, 10.3], [-13.03, 10.47], [-13.25, 11.0], [-13.03, 11.53], [-12.5, 11.75], [-11.97, 11.53], [-11.8, 11.12], [-11.5, 11.25], [-11.25, 11.15], [-11.0, 11.25], [-10.75, 11.15], [-10.5, 11.25], [-10.25, 11.15], [-10.0, 11.25], [-9.47, 11.03], [-9.25, 10.5], [-9.35, 10.25], [-9.25, 10.0], [-9.47, 9.47], [-9.82, 9.32], [-9.97, 8.97], [-10.32, 8.82], [-10.47, 8.47], [-10.82, 8.32], [-10.97, 7.97], [-11.5, 7.75], [-11.75, 7.85], [-12.0, 7.75], [-12.25, 7.85], [-12.5, 7.75], [-13.03, 7.97], [-13.25, 8.5], [-13.03, 9.03], [-12.68, 9.18], [-12.65, 9.25], [-12.75, 9.5]]]]}, "2018-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 12.03], [-12.5, 12.25], [-11.97, 12.03], [-11.82, 11.68], [-11.75, 11.65], [-11.68, 11.68], [-11.53, 12.03], [-11.18, 12.18], [-11.03, 12.53], [-10.5, 12.75], [-10.25, 12.65], [-10.0, 12.75], [-9.75, 12.65], [-9.5, 12.75], [-8.97, 12.53], [-8.75, 12.0], [-8.85, 11.75], [-8.82, 11.68], [-8.47, 11.53], [-8.25, 11.0], [-8.47, 10.47], [-9.0, 10.25], [-9.25, 10.35], [-9.32, 10.32], [-9.35, 10.25], [-9.25, 10.0], [-9.35, 9.75], [-9.25, 9.5], [-9.47, 8.97], [-9.82, 8.82], [-9.97, 8.47], [-10.37, 8.3], [-10.25, 8.0], [-10.47, 7.47], [-11.0, 7.25], [-11.25, 7.35], [-11.5, 7.25], [-12.03, 7.47], [-12.18, 7.82], [-12.25, 7.85], [-12.5, 7.75], [-13.03, 7.97], [-13.25, 8.5], [-13.03, 9.03], [-12.68, 9.18], [-12.65, 9.25], [-12.75, 9.5], [-12.65, 9.75], [-12.75, 10.0], [-12.65, 10.25], [-12.68, 10.32], [-13.03, 10.47], [-13.25, 11.0], [-13.15, 11.25], [-13.25, 11.5], [-13.03, 12.03]]]]}, "2018-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 12.03], [-12.5, 12.25], [-11.97, 12.03], [-11.82, 11.68], [-11.75, 11.65], [-11.68, 11.68], [-11.53, 12.03], [-11.18, 12.18], [-11.03, 12.53], [-10.5, 12.75], [-10.25, 12.65], [-10.0, 12.75], [-9.75, 12.65], [-9.5, 12.75], [-8.97, 12.53], [-8.75, 12.0], [-8.85, 11.75], [-8.82, 11.68], [-8.47, 11.53], [-8.25, 11.0], [-8.47, 10.47], [-9.0, 10.25], [-9.25, 10.35], [-9.32, 10.32], [-9.35, 10.25], [-9.25, 10.0], [-9.35, 9.75], [-9.25, 9.5], [-9.47, 8.97], [-9.82, 8.82], [-9.97, 8.47], [-10.37, 8.3], [-10.25, 8.0], [-10.47, 7.47], [-11.0, 7.25], [-11.25, 7.35], [-11.5, 7.25], [-12.03, 7.47], [-12.18, 7.82], [-12.25, 7.85], [-12.5, 7.75], [-13.03, 7.97], [-13.25, 8.5], [-13.03, 9.03], [-12.68, 9.18], [-12.65, 9.25], [-12.68, 9.32], [-13.03, 9.47], [-13.25, 10.0], [-13.04, 10.5], [-13.25, 11.0], [-13.15, 11.25], [-13.25, 11.5], [-13.03, 12.03]]]]}, "2018-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 12.03], [-12.5, 12.25], [-11.97, 12.03], [-11.82, 11.68], [-11.75, 11.65], [-11.68, 11.68], [-11.53, 12.03], [-11.18, 12.18], [-11.03, 12.53], [-10.5, 12.75], [-10.25, 12.65], [-10.0, 12.75], [-9.75, 12.65], [-9.5, 12.75], [-8.97, 12.53], [-8.75, 12.0], [-8.85, 11.75], [-8.82, 11.68], [-8.47, 11.53], [-8.25, 11.0], [-8.47, 10.47], [-9.0, 10.25], [-9.25, 10.35], [-9.32, 10.32], [-9.35, 10.25], [-9.25, 10.0], [-9.35, 9.75], [-9.25, 9.5], [-9.47, 8.97], [-9.82, 8.82], [-9.97, 8.47], [-10.37, 8.3], [-10.25, 8.0], [-10.47, 7.47], [-11.0, 7.25], [-11.25, 7.35], [-11.5, 7.25], [-12.03, 7.47], [-12.18, 7.82], [-12.25, 7.85], [-12.5, 7.75], [-13.03, 7.97], [-13.25, 8.5], [-13.03, 9.03], [-12.68, 9.18], [-12.65, 9.25], [-12.68, 9.32], [-13.03, 9.47], [-13.25, 10.0], [-13.04, 10.5], [-13.25, 11.0], [-13.15, 11.25], [-13.25, 11.5], [-13.03, 12.03]]]]}, "2018-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.25, 10.0], [-13.03, 10.53], [-12.5, 10.75], [-11.97, 10.53], [-11.75, 10.0], [-11.87, 9.7], [-11.47, 9.53], [-11.25, 9.0], [-11.47, 8.47], [-12.0, 8.25], [-12.53, 8.47], [-12.75, 9.0], [-12.62, 9.3], [-13.03, 9.47], [-13.25, 10.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.263202162809307}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1957189579641483}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.788951973225835, 26.905836816711826, 26.590562556248756, 27.265933358770383, 28.174096035386583]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.79453099768159, 24.58608649137733, 23.477007372832247, 23.748607335901113, 27.50186840861437]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7909262726839672, -2.31145391606769, -2.6141539574905215, -1.909732055021959, -1.2137606687193738]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4043624504872128, -4.263202162809307, -4.122558358867934, -3.020886020322905, -1.2894001364812198]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.800439300592236, -2.1660800949598227, -2.5084384423055712, -1.8706628952419868, -1.468725505852932]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.383860143698371, -3.4039647522623175, -3.590495712539933, -3.2146685288786685, -1.4777878238469118]}}