{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:39.020746", "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": "2023-Dec-24_to_2023-Dec-30_15.5_-23.0"}, "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": 2023120000454}, "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": "December 24 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 30 2023"}, "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": 76187.98369752485}, "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": ["Namibia"]}, "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": ["Atlantic Ocean"]}, "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": -23.0}, "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": 15.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "15.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 14.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[15.0, -27.75], [14.47, -27.53], [14.25, -27.0], [14.47, -26.47], [14.82, -26.32], [14.85, -26.25], [14.82, -26.18], [14.47, 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["W.Southern-Africa"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, -26.47], [15.0, -26.25], [15.53, -26.47], [15.75, -27.0], [15.53, -27.53], [15.0, -27.75], [14.47, -27.53], [14.25, -27.0], [14.47, -26.47]]]]}, "2023-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, -26.47], [15.0, -26.25], [15.53, -26.47], [15.75, -27.0], [15.53, -27.53], [15.0, -27.75], [14.47, -27.53], [14.25, -27.0], [14.47, -26.47]]]]}, "2023-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.75, -27.0], [15.53, -27.53], [15.0, -27.75], [14.47, -27.53], [14.25, -27.0], [14.47, -26.47], [15.0, -26.25], [15.53, -26.47], [15.75, -27.0]]], [[[13.75, -21.0], [13.97, -20.47], [14.5, -20.25], [15.03, -20.47], [15.18, -20.82], [15.53, -20.97], [15.75, -21.5], [15.63, -21.8], [16.03, -21.97], [16.25, 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18.22644130521161, 17.957439785444137, 18.631650535713504]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.2973646024068444, -1.2470699014888282, -3.079492192880549, -3.969027645996018, -3.996610923802249, -4.518285455858643, -3.8145816170525797]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.2973646024068444, -1.2470699014888282, -3.943948781026961, -4.676471562040888, -4.995943597419398, -6.726581613966516, -5.196373376489305]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3631701316007379, -1.2870492682614219, -1.4658218419804818, -1.740431701717405, -1.7027021480037434, -1.8426020232911153, -1.5143884016162035]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3631701316007379, -1.2870492682614219, -1.8438458171711098, -2.188419698187531, -2.0888160991842644, -2.3606374135714714, -1.7885741560583759]}}