{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:05.943203", "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": "2019-Feb-12_to_2019-Feb-15_22.5_-18.5"}, "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": 2019020000420}, "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 12 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 15 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 52611.861678162}, "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": ["Botswana", "Namibia", "Zambia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Southern-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": -18.5}, "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": 22.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "22.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 22.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -17.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -18.25], [21.75, -18.0], [21.97, -17.47], [22.5, -17.25], [22.75, -17.35], [22.82, -17.32], [22.97, -16.97], [23.5, -16.75], [24.03, -16.97], [24.25, -17.5], [24.03, -18.03], [23.68, -18.18], [23.65, -18.25], [23.75, -18.5], [23.65, -18.75], [23.75, -19.0], [23.53, -19.53], [23.0, -19.75], [22.75, -19.65], [22.5, -19.75], [21.97, -19.53], [21.75, -19.0], [21.85, -18.75], [21.75, -18.5], [21.85, -18.25]]]]}, "2019-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -18.25], [21.75, -18.0], [21.97, -17.47], [22.5, -17.25], [22.75, -17.35], [22.82, -17.32], [22.97, -16.97], [23.5, -16.75], [24.03, -16.97], [24.18, -17.32], [24.53, -17.47], [24.75, -18.0], [24.65, -18.25], [24.68, -18.32], [25.03, -18.47], [25.18, -18.82], [25.53, -18.97], [25.75, -19.5], [25.53, -20.03], [25.13, -20.2], [25.25, -20.5], [25.03, -21.03], [24.5, -21.25], [23.97, -21.03], [23.82, -20.68], [23.75, -20.65], [23.5, -20.75], [22.97, -20.53], [22.75, -20.0], [22.85, -19.75], [22.82, -19.68], [22.75, -19.65], [22.5, -19.75], [21.97, -19.53], [21.75, -19.0], [21.85, -18.75], [21.75, -18.5], [21.85, -18.25]]]]}, "2019-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.85, -18.25], [21.75, -18.0], [21.97, -17.47], [22.5, -17.25], [22.75, -17.35], [22.82, -17.32], [22.97, -16.97], [23.5, -16.75], [24.03, -16.97], [24.18, -17.32], [24.53, -17.47], [24.75, -18.0], [24.65, -18.25], [24.68, -18.32], [25.03, -18.47], [25.18, -18.82], [25.53, -18.97], [25.75, -19.5], [25.53, -20.03], [25.13, -20.2], [25.25, -20.5], [25.03, -21.03], [24.5, -21.25], [23.97, -21.03], [23.82, -20.68], [23.75, -20.65], [23.5, -20.75], [22.97, -20.53], [22.75, -20.0], [22.85, -19.75], [22.82, -19.68], [22.75, -19.65], [22.5, -19.75], [21.97, -19.53], [21.75, -19.0], [21.85, -18.75], [21.75, -18.5], [21.85, -18.25]]]]}, "2019-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[22.97, -18.97], [23.32, -18.82], [23.35, -18.75], [23.25, -18.5], [23.35, -18.25], [23.25, -18.0], [23.47, -17.47], [24.0, -17.25], [24.53, -17.47], [24.75, -18.0], [24.65, -18.25], [24.68, -18.32], [25.03, -18.47], [25.18, -18.82], [25.53, -18.97], [25.75, -19.5], [25.53, -20.03], [25.13, -20.2], [25.25, -20.5], [25.03, -21.03], [24.5, -21.25], [23.97, -21.03], [23.82, -20.68], [23.75, -20.65], [23.5, -20.75], [22.97, -20.53], [22.75, -20.0], [22.85, -19.75], [22.75, -19.5], [22.97, -18.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.582844310777773}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6734375539935145}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.124321241878192, 22.35077125897641, 22.265811721102637, 22.60554001662217]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.632443635090738, 21.45279968991923, 21.595155378363245, 22.019891927650292]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.4813222145186353, -2.690600655520468, -2.744619271290942, -2.6511285210376316]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.1638254657830203, -3.582844310777773, -3.42630651591287, -3.2726160131537654]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5465405412629056, -1.5582654533847347, -1.61057021587998, -1.4350174187878384]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9379075270048671, -1.9464287867345067, -2.118974742994611, -1.8969970801892797]}}