{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:19.229507", "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": "2026-Jan-10_to_2026-Jan-12_12.0_57.5"}, "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": 2026010000364}, "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": "January 10 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 12 2026"}, "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": 128628.01151572069}, "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": ["Denmark", "Norway", "Sweden"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Europe"]}, "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": ["Baltic Sea", "Kattegat", "Skagerrak"]}, "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": 57.5}, "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": 12.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "12.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 10.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 16.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.97, 59.03], [10.32, 59.18], [10.47, 59.53], [10.82, 59.68], 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"MultiPolygon", "coordinates": [[[[9.97, 59.03], [10.32, 59.18], [10.47, 59.53], [10.82, 59.68], [10.97, 60.03], [11.32, 60.18], [11.47, 60.53], [12.0, 60.75], [12.25, 60.65], [12.5, 60.75], [12.75, 60.65], [13.0, 60.75], [13.25, 60.65], [13.5, 60.75], [14.03, 60.53], [14.25, 60.0], [14.15, 59.75], [14.18, 59.68], [14.25, 59.65], [14.5, 59.75], [14.75, 59.65], [15.0, 59.75], [15.25, 59.65], [15.5, 59.75], [16.03, 59.53], [16.18, 59.18], [16.53, 59.03], [16.75, 58.5], [16.65, 58.25], [16.75, 58.0], [16.65, 57.75], [16.75, 57.5], [16.53, 56.97], [16.18, 56.82], [16.04, 56.5], [16.25, 56.0], [16.03, 55.47], [15.5, 55.25], [15.25, 55.35], [15.0, 55.25], [14.75, 55.35], [14.68, 55.32], [14.53, 54.97], [14.0, 54.75], [13.75, 54.85], [13.5, 54.75], [13.25, 54.85], [13.0, 54.75], [12.75, 54.85], [12.5, 54.75], [11.97, 54.97], [11.75, 55.5], [11.85, 55.75], [11.82, 55.82], [11.47, 55.97], [11.32, 56.32], [10.97, 56.47], [10.82, 56.82], [10.47, 56.97], [10.32, 57.32], [9.97, 57.47], [9.75, 58.0], [9.85, 58.25], [9.75, 58.5], [9.97, 59.03]]]]}, "2026-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[9.97, 59.03], [10.32, 59.18], [10.47, 59.53], [10.82, 59.68], [10.97, 60.03], [11.32, 60.18], [11.47, 60.53], [12.0, 60.75], [12.25, 60.65], [12.5, 60.75], [12.75, 60.65], [13.0, 60.75], [13.25, 60.65], [13.5, 60.75], [14.03, 60.53], [14.25, 60.0], [14.15, 59.75], [14.18, 59.68], [14.25, 59.65], [14.5, 59.75], [14.75, 59.65], [15.0, 59.75], [15.25, 59.65], [15.5, 59.75], [16.03, 59.53], [16.18, 59.18], [16.53, 59.03], [16.75, 58.5], [16.65, 58.25], [16.75, 58.0], [16.65, 57.75], [16.75, 57.5], [16.53, 56.97], [16.18, 56.82], [16.04, 56.5], [16.25, 56.0], [16.03, 55.47], [15.5, 55.25], [15.25, 55.35], [15.0, 55.25], [14.75, 55.35], [14.68, 55.32], [14.53, 54.97], [14.0, 54.75], [13.75, 54.85], [13.5, 54.75], [13.25, 54.85], [13.0, 54.75], [12.75, 54.85], [12.5, 54.75], [11.97, 54.97], [11.75, 55.5], [11.85, 55.75], [11.82, 55.82], [11.47, 55.97], [11.32, 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{"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.53899524125876, -17.207898332609545, -9.992015241239471]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7762920538562785, -2.512312542237013, -1.874009326974895]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.364567477578487, -3.7438224645704676, -2.4417304113391847]}}