{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:54.347017", "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-Jun-27_to_2023-Jun-30_113.5_51.5"}, "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": 2023060000998}, "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": "June 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 30 2023"}, "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": 94130.75670295802}, "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": ["Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 51.5}, "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": 113.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "113.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 112.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 50.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[111.97, 53.53], [112.5, 53.75], [113.0, 53.54], [113.5, 53.75], [113.75, 53.65], [114.0, 53.75], [114.25, 53.65], [114.5, 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["E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.75, 52.5], [111.97, 53.03], [112.5, 53.25], [113.03, 53.03], [113.18, 52.68], [113.53, 52.53], [113.68, 52.18], [114.03, 52.03], [114.25, 51.5], [114.15, 51.25], [114.25, 51.0], [114.03, 50.47], [113.5, 50.25], [113.25, 50.35], [113.0, 50.25], [112.47, 50.47], [112.25, 51.0], [112.35, 51.25], [112.32, 51.32], [111.97, 51.47], [111.75, 52.0], [111.85, 52.25], [111.75, 52.5]]]]}, "2023-06-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.75, 52.5], [111.85, 52.75], [111.75, 53.0], [111.97, 53.53], [112.5, 53.75], [113.0, 53.54], [113.5, 53.75], [113.75, 53.65], [114.0, 53.75], [114.25, 53.65], [114.5, 53.75], [115.03, 53.53], [115.25, 53.0], [115.15, 52.75], [115.18, 52.68], [115.25, 52.65], [115.32, 52.68], [115.47, 53.03], [116.0, 53.25], 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over entire duration", "value": -7.612788166109283}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.886718213195793}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.601339894300736, 13.170730082754972, 13.31440430646478, 13.913312630937526]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.626689320851312, 11.388384409896673, 11.696697024310367, 12.384559600100431]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.670258467326074, -5.108318438518612, -5.045362607510408, -4.537396414396888]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.998495190495589, -7.612788166109283, -6.431339759689706, -5.9624845969470925]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.337626591113464, -1.5446959958064317, -1.6169069151365467, -1.5251181879492837]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4125708949259546, -2.1096944975158722, -2.0465371619113797, -1.857936974185119]}}