{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:39.831295", "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-27_to_2023-Dec-31_134.5_55.5"}, "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": 2023120000523}, "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 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 31 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 54537.87577178812}, "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": 55.5}, "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": 134.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "134.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 129.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 135.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[131.5, 56.25], [131.75, 56.15], [132.0, 56.25], [132.25, 56.15], [132.32, 56.18], [132.47, 56.53], [132.88, 56.7], 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"description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.97, 56.03], [130.5, 56.25], [131.03, 56.03], [131.25, 55.5], [131.03, 54.97], [130.68, 54.82], [130.53, 54.47], [130.0, 54.25], [129.47, 54.47], [129.25, 55.0], [129.47, 55.53], [129.82, 55.68], [129.97, 56.03]]]]}, "2023-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.25, 55.0], [128.47, 55.53], [129.0, 55.75], [129.25, 55.65], [129.32, 55.68], [129.47, 56.03], [130.0, 56.25], [130.25, 56.15], [130.5, 56.25], [131.0, 56.04], [131.5, 56.25], [131.75, 56.15], [132.0, 56.25], [132.25, 56.15], [132.32, 56.18], [132.47, 56.53], [133.0, 56.75], [133.25, 56.65], [133.5, 56.75], [133.75, 56.65], [134.0, 56.75], [134.53, 56.53], [134.68, 56.18], [135.03, 56.03], [135.18, 55.68], [135.53, 55.53], [135.75, 55.0], [135.53, 54.47], [135.0, 54.25], [134.75, 54.35], [134.5, 54.25], [134.25, 54.35], [134.0, 54.25], [133.47, 54.47], [133.3, 54.88], [133.13, 54.8], [133.25, 54.5], [133.03, 53.97], [132.5, 53.75], [132.0, 53.96], [131.5, 53.75], [131.25, 53.85], [131.0, 53.75], [130.75, 53.85], [130.5, 53.75], [130.25, 53.85], [130.0, 53.75], [129.75, 53.85], [129.5, 53.75], [129.25, 53.85], [129.0, 53.75], [128.47, 53.97], [128.25, 54.5], [128.35, 54.75], [128.25, 55.0]]]]}, "2023-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.25, 55.0], [128.47, 55.53], [129.0, 55.75], [129.25, 55.65], [129.32, 55.68], [129.47, 56.03], [130.0, 56.25], [130.25, 56.15], [130.5, 56.25], [131.0, 56.04], [131.5, 56.25], [131.75, 56.15], [132.0, 56.25], [132.25, 56.15], [132.32, 56.18], [132.47, 56.53], [132.88, 56.7], [132.75, 57.0], [132.97, 57.53], [133.5, 57.75], [134.03, 57.53], [134.18, 57.18], [134.25, 57.15], [134.5, 57.25], [135.03, 57.03], [135.18, 56.68], [135.53, 56.53], [135.75, 56.0], [135.54, 55.5], [135.75, 55.0], [135.53, 54.47], [135.0, 54.25], 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-8.117639259393911]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.148071613103042, -9.581823144541431, -9.078812480070098, -10.083644410511681, -10.805596096015279]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2263256198490096, -1.3294997838619873, -1.3791561198065385, -1.4441980911364656, -1.5513836677117074]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2940741608253328, -1.7011475926368815, -1.6732146638871572, -1.849075746157556, -1.9558991420913814]}}