{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:57.078983", "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-Mar-15_to_2011-Mar-20_351.0_7.5"}, "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": 2011030000859}, "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": "March 15 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 20 2011"}, "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": 73591.71621660123}, "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", "Guinea", "Liberia"]}, "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": 7.5}, "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": 351.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "351.0\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": 353.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 5.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 8.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-03-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-8.03, 7.47], [-8.25, 8.0], [-8.03, 8.53], [-7.5, 8.75], [-7.25, 8.65], [-7.0, 8.75], [-6.47, 8.53], [-6.25, 8.0], [-6.47, 7.47], [-7.0, 7.25], [-7.25, 7.35], [-7.5, 7.25], [-8.03, 7.47]]]]}, "2011-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.25, 8.0], [-10.03, 8.53], [-9.5, 8.75], [-9.0, 8.54], [-8.5, 8.75], [-8.25, 8.65], [-8.0, 8.75], [-7.75, 8.65], [-7.5, 8.75], [-7.25, 8.65], [-7.0, 8.75], [-6.47, 8.53], [-6.25, 8.0], [-6.35, 7.75], [-6.25, 7.5], [-6.47, 6.97], [-7.0, 6.75], [-7.25, 6.85], [-7.5, 6.75], [-7.75, 6.85], [-8.0, 6.75], [-8.25, 6.85], [-8.5, 6.75], [-8.75, 6.85], [-9.0, 6.75], [-9.53, 6.97], [-9.68, 7.32], [-10.03, 7.47], [-10.25, 8.0]]]]}, "2011-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.75, 6.5], [-10.53, 7.03], [-10.0, 7.25], [-9.75, 7.15], [-9.68, 7.18], [-9.65, 7.25], [-9.68, 7.32], [-10.03, 7.47], [-10.25, 8.0], [-10.03, 8.53], [-9.5, 8.75], [-9.0, 8.54], [-8.5, 8.75], [-8.25, 8.65], [-8.0, 8.75], [-7.75, 8.65], [-7.5, 8.75], [-7.25, 8.65], [-7.0, 8.75], [-6.47, 8.53], [-6.25, 8.0], [-6.35, 7.75], [-6.25, 7.5], [-6.47, 6.97], [-7.0, 6.75], [-7.25, 6.85], [-7.32, 6.82], [-7.47, 6.47], [-7.82, 6.32], [-7.97, 5.97], [-8.32, 5.82], [-8.47, 5.47], [-9.0, 5.25], [-9.25, 5.35], [-9.5, 5.25], [-10.03, 5.47], [-10.18, 5.82], [-10.53, 5.97], [-10.75, 6.5]]]]}, "2011-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.65, 7.25], [-10.75, 7.5], [-10.65, 7.75], [-10.75, 8.0], [-10.53, 8.53], [-10.0, 8.75], [-9.75, 8.65], [-9.5, 8.75], [-9.0, 8.54], [-8.5, 8.75], [-8.25, 8.65], [-8.0, 8.75], [-7.47, 8.53], [-7.32, 8.18], [-7.25, 8.15], [-7.0, 8.25], [-6.47, 8.03], [-6.25, 7.5], [-6.47, 6.97], [-7.0, 6.75], [-7.25, 6.85], [-7.32, 6.82], [-7.47, 6.47], [-7.82, 6.32], [-7.97, 5.97], [-8.32, 5.82], [-8.47, 5.47], [-9.0, 5.25], [-9.25, 5.35], [-9.5, 5.25], [-10.03, 5.47], [-10.18, 5.82], [-10.53, 5.97], [-10.75, 6.5], [-10.65, 6.75], [-10.75, 7.0], [-10.65, 7.25]]]]}, "2011-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.65, 7.25], [-10.75, 7.5], [-10.65, 7.75], [-10.75, 8.0], [-10.53, 8.53], [-10.0, 8.75], [-9.75, 8.65], [-9.5, 8.75], [-9.0, 8.54], [-8.5, 8.75], [-8.25, 8.65], [-8.0, 8.75], [-7.47, 8.53], [-7.25, 8.0], [-7.35, 7.75], [-7.25, 7.5], [-7.35, 7.25], [-7.25, 7.0], [-7.47, 6.47], [-7.82, 6.32], [-7.97, 5.97], [-8.32, 5.82], [-8.47, 5.47], [-9.0, 5.25], [-9.25, 5.35], [-9.5, 5.25], [-10.03, 5.47], [-10.18, 5.82], [-10.53, 5.97], [-10.75, 6.5], [-10.65, 6.75], [-10.75, 7.0], [-10.65, 7.25]]]]}, "2011-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-10.65, 7.75], [-10.75, 8.0], [-10.53, 8.53], [-10.0, 8.75], [-9.75, 8.65], [-9.5, 8.75], [-8.97, 8.53], [-8.82, 8.18], [-8.7, 8.12], [-8.53, 8.53], [-8.0, 8.75], [-7.47, 8.53], [-7.25, 8.0], [-7.47, 7.47], [-8.0, 7.25], [-8.3, 7.38], [-8.35, 7.25], [-8.25, 7.0], [-8.47, 6.47], [-9.0, 6.25], [-9.25, 6.35], [-9.5, 6.25], [-9.75, 6.35], [-10.0, 6.25], [-10.53, 6.47], [-10.75, 7.0], [-10.65, 7.25], [-10.75, 7.5], [-10.65, 7.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.488275855835411}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5381931007388363}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.008390403237172, 25.170853705437764, 24.92778941507936, 24.787394393275065, 24.857312920882578, 25.21099225298667]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.2113768830165, 23.82634818502646, 23.465757532074008, 23.345536608379746, 23.5898728348202, 24.645826502926013]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.8683446968765622, -1.6442926488600336, -1.6362405036733028, -1.618819229469205, -1.3964098203639452, -1.257936594759662]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.8690763717763161, -2.126644809446532, -2.488275855835411, -2.2138651246233394, -1.9089038134480916, -1.5399915761295233]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.575774155677289, -1.4263025730771406, -1.674278474784111, -1.7729244244071303, -1.6492987064486173, -1.4459248902366213]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5843645421157073, -1.6558410700414512, -2.2095471591336855, -2.2187951248302076, -2.0582040462031603, -1.6044030057141336]}}