{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:05.440122", "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": "2022-Nov-22_to_2022-Nov-28_355.5_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": 2022110000832}, "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": "November 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 28 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 91264.46842771894}, "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": ["Burkina Faso", "C\u00f4te d'Ivoire", "Guinea", "Mali"]}, "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": 355.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 349.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 355.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 8.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 11.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.75, 10.5], [-10.53, 11.03], [-10.0, 11.25], [-9.47, 11.03], [-9.32, 10.68], [-9.25, 10.65], [-9.0, 10.75], [-8.75, 10.65], [-8.5, 10.75], [-8.25, 10.65], [-8.12, 10.7], [-8.25, 11.0], [-8.15, 11.25], [-8.25, 11.5], [-8.03, 12.03], [-7.5, 12.25], [-7.25, 12.15], [-7.0, 12.25], [-6.75, 12.15], [-6.5, 12.25], [-5.97, 12.03], [-5.75, 11.5], [-5.85, 11.25], [-5.82, 11.18], [-5.47, 11.03], [-5.3, 10.62], [-5.0, 10.75], [-4.47, 10.53], [-4.32, 10.18], [-3.97, 10.03], [-3.75, 9.5], [-3.97, 8.97], [-4.5, 8.75], [-5.0, 8.96], [-5.5, 8.75], [-6.0, 8.96], [-6.5, 8.75], [-6.8, 8.88], [-6.85, 8.75], [-6.75, 8.5], [-6.97, 7.97], [-7.5, 7.75], [-8.03, 7.97], [-8.25, 8.5], [-8.15, 8.75], [-8.18, 8.82], [-8.5, 8.96], [-9.0, 8.75], [-9.53, 8.97], [-9.68, 9.32], [-10.03, 9.47], [-10.18, 9.82], [-10.53, 9.97], [-10.75, 10.5]]]]}, "2022-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.75, 10.5], [-10.53, 11.03], [-10.0, 11.25], [-9.47, 11.03], [-9.32, 10.68], [-9.25, 10.65], [-9.0, 10.75], [-8.75, 10.65], [-8.5, 10.75], [-8.25, 10.65], [-8.12, 10.7], [-8.25, 11.0], [-8.15, 11.25], [-8.25, 11.5], [-8.03, 12.03], [-7.5, 12.25], [-7.25, 12.15], [-7.0, 12.25], [-6.75, 12.15], [-6.5, 12.25], [-5.97, 12.03], [-5.75, 11.5], [-5.85, 11.25], [-5.82, 11.18], [-5.47, 11.03], [-5.3, 10.62], [-5.0, 10.75], [-4.47, 10.53], [-4.32, 10.18], [-3.97, 10.03], [-3.75, 9.5], [-3.97, 8.97], [-4.5, 8.75], [-5.0, 8.96], [-5.5, 8.75], [-6.0, 8.96], [-6.5, 8.75], [-6.8, 8.88], [-6.85, 8.75], [-6.75, 8.5], [-6.97, 7.97], [-7.5, 7.75], [-8.03, 7.97], [-8.25, 8.5], [-8.15, 8.75], [-8.18, 8.82], [-8.5, 8.96], [-9.0, 8.75], [-9.53, 8.97], [-9.68, 9.32], [-10.03, 9.47], [-10.18, 9.82], [-10.53, 9.97], [-10.75, 10.5]]]]}, "2022-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.75, 10.5], [-10.53, 11.03], [-10.0, 11.25], [-9.47, 11.03], [-9.32, 10.68], [-9.25, 10.65], [-9.0, 10.75], [-8.75, 10.65], [-8.5, 10.75], [-8.25, 10.65], [-8.12, 10.7], [-8.25, 11.0], [-8.15, 11.25], [-8.25, 11.5], [-8.03, 12.03], [-7.5, 12.25], [-7.25, 12.15], [-7.0, 12.25], [-6.75, 12.15], [-6.5, 12.25], [-5.97, 12.03], [-5.75, 11.5], [-5.85, 11.25], [-5.82, 11.18], [-5.75, 11.15], [-5.5, 11.25], [-4.97, 11.03], [-4.82, 10.68], [-4.47, 10.53], [-4.32, 10.18], [-3.97, 10.03], [-3.75, 9.5], [-3.97, 8.97], [-4.5, 8.75], [-5.0, 8.96], [-5.5, 8.75], [-6.0, 8.96], [-6.5, 8.75], [-6.8, 8.88], [-6.85, 8.75], [-6.75, 8.5], [-6.97, 7.97], [-7.5, 7.75], [-8.03, 7.97], [-8.25, 8.5], [-8.15, 8.75], [-8.18, 8.82], [-8.5, 8.96], [-9.0, 8.75], [-9.53, 8.97], [-9.68, 9.32], [-10.03, 9.47], [-10.18, 9.82], [-10.53, 9.97], [-10.75, 10.5]]]]}, "2022-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 10.97], [-8.25, 11.5], [-8.03, 12.03], [-7.5, 12.25], [-7.25, 12.15], [-7.0, 12.25], [-6.75, 12.15], [-6.5, 12.25], [-5.97, 12.03], [-5.75, 11.5], [-5.85, 11.25], [-5.82, 11.18], [-5.75, 11.15], [-5.5, 11.25], [-5.25, 11.15], [-5.0, 11.25], [-4.75, 11.15], [-4.5, 11.25], [-3.97, 11.03], [-3.75, 10.5], [-3.85, 10.25], [-3.75, 10.0], [-3.85, 9.75], [-3.75, 9.5], [-3.97, 8.97], [-4.5, 8.75], [-5.0, 8.96], [-5.5, 8.75], [-6.03, 8.97], [-6.25, 9.5], [-6.12, 9.8], [-6.53, 9.97], [-6.68, 10.32], [-7.03, 10.47], [-7.18, 10.82], [-7.25, 10.85], [-7.5, 10.75], [-8.03, 10.97]]]]}, "2022-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 10.97], [-8.25, 11.5], [-8.03, 12.03], [-7.5, 12.25], [-7.25, 12.15], [-7.0, 12.25], [-6.75, 12.15], [-6.5, 12.25], [-5.97, 12.03], [-5.75, 11.5], [-5.85, 11.25], [-5.82, 11.18], [-5.75, 11.15], [-5.5, 11.25], [-5.25, 11.15], [-5.0, 11.25], [-4.75, 11.15], [-4.5, 11.25], [-3.97, 11.03], [-3.75, 10.5], [-3.85, 10.25], [-3.75, 10.0], [-3.85, 9.75], [-3.75, 9.5], [-3.97, 8.97], [-4.5, 8.75], [-5.0, 8.96], [-5.5, 8.75], [-6.03, 8.97], [-6.25, 9.5], [-6.12, 9.8], [-6.53, 9.97], [-6.68, 10.32], [-7.03, 10.47], [-7.18, 10.82], [-7.25, 10.85], [-7.5, 10.75], [-8.03, 10.97]]]]}, "2022-11-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.75, 10.5], [-6.53, 11.03], [-6.0, 11.25], [-5.75, 11.15], [-5.5, 11.25], [-5.25, 11.15], [-5.0, 11.25], [-4.75, 11.15], [-4.5, 11.25], [-3.97, 11.03], [-3.75, 10.5], [-3.85, 10.25], [-3.75, 10.0], [-3.85, 9.75], [-3.75, 9.5], [-3.97, 8.97], [-4.5, 8.75], [-5.0, 8.96], [-5.5, 8.75], [-6.03, 8.97], [-6.25, 9.5], [-6.12, 9.8], [-6.53, 9.97], [-6.75, 10.5]]]]}, "2022-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.53, 9.97], [-6.75, 10.5], [-6.53, 11.03], [-6.0, 11.25], [-5.75, 11.15], [-5.5, 11.25], [-4.97, 11.03], [-4.75, 10.5], [-4.97, 9.97], [-5.5, 9.75], [-5.75, 9.85], [-6.0, 9.75], [-6.53, 9.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.2063617570991028}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9840108591489}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.841281285068703, 24.357236217890318, 25.031857677557184, 25.14074866042813, 25.13216082780508, 25.486273818973928, 25.282862575984666]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.936707773304136, 23.39228734107371, 23.931442709565147, 24.754975728056536, 24.548867745103337, 25.05566223402826, 25.13142778539435]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8630643174399932, -2.3490526206096196, -1.6791468011658897, -2.1200844406966723, -2.087911764363914, -1.936475308286198, -1.67673306802007]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2063617570991028, -2.913395864767608, -2.3317450285425707, -2.9298823356163552, -2.808050002897801, -2.222553042965842, -1.7408266737717781]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8373870743261411, -2.3064366650782206, -1.5961169905671513, -1.6833037519200313, -1.6697667526226248, -1.4932658957796991, -1.4212043195731905]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.49735586656079, -2.8476925529154737, -1.8278080001058998, -2.172315570903064, -2.0588858451170693, -1.6297147919620592, -1.4530445057592178]}}