{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:23.177249", "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-Apr-11_to_2023-Apr-13_21.0_22.0"}, "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": 2023040000499}, "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 11 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 13 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 158795.32278850093}, "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": ["Chad", "Libya"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa", "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": 22.0}, "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": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 25.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[19.5, 24.25], [19.75, 24.15], [19.82, 24.18], [19.97, 24.53], [20.5, 24.75], [20.75, 24.65], [20.82, 24.68], [20.97, 25.03], 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["Sahara"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 23.5], [18.97, 24.03], [19.5, 24.25], [19.75, 24.15], [19.82, 24.18], [19.97, 24.53], [20.5, 24.75], [20.75, 24.65], [20.82, 24.68], [20.97, 25.03], [21.32, 25.18], [21.47, 25.53], [22.0, 25.75], [22.25, 25.65], [22.5, 25.75], [23.0, 25.54], [23.32, 25.68], [23.47, 26.03], [24.0, 26.25], [24.25, 26.15], [24.5, 26.25], [25.03, 26.03], [25.18, 25.68], [25.53, 25.53], [25.75, 25.0], [25.65, 24.75], [25.75, 24.5], [25.65, 24.25], [25.75, 24.0], [25.53, 23.47], [25.0, 23.25], [24.7, 23.38], [24.53, 22.97], [24.0, 22.75], [23.7, 22.88], [23.65, 22.75], [23.75, 22.5], [23.53, 21.97], [23.18, 21.82], [23.03, 21.47], [22.5, 21.25], [22.0, 21.46], [21.68, 21.32], [21.53, 20.97], [21.18, 20.82], [21.03, 20.47], [20.5, 20.25], [20.25, 20.35], [20.0, 20.25], [19.75, 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[16.99266696495863, 15.002554863599812, 17.93286405293287]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.2481611751705115, -7.845560069884387, -5.688662337036107]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.032618657702585, -8.70940168266128, -6.366829236678711]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4518895277747654, -2.2233440317525575, -1.6351677851086333]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7769224948022468, -2.4527520933401714, -2.015812622373035]}}