{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:16.230303", "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-02_to_2026-Jan-05_350.5_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": 2026010000130}, "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 02 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 05 2026"}, "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": 255431.93654965225}, "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": ["Ireland", "United Kingdom"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Atlantic-Ocean", "N.Europe", "West&Central-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": ["Celtic Sea", "Irish Sea and St. George's Channel", "North 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": 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": 350.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "350.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 347.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 354.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-9.5, 52.25], [-8.97, 52.03], [-8.75, 51.5], [-8.97, 50.97], [-9.5, 50.75], [-10.03, 50.97], [-10.25, 51.5], [-10.03, 52.03], [-9.5, 52.25]]]]}, "2026-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 48.53], [-12.68, 48.68], [-12.65, 48.75], [-12.75, 49.0], [-12.53, 49.53], [-12.18, 49.68], [-12.15, 49.75], [-12.25, 50.0], [-12.03, 50.53], [-11.68, 50.68], [-11.53, 51.03], [-11.18, 51.18], [-11.03, 51.53], [-10.62, 51.7], [-10.75, 52.0], [-10.53, 52.53], [-10.18, 52.68], [-10.04, 53.0], [-10.25, 53.5], [-10.03, 54.03], [-9.5, 54.25], [-9.25, 54.15], [-9.0, 54.25], [-8.75, 54.15], [-8.68, 54.18], [-8.53, 54.53], [-8.0, 54.75], [-7.75, 54.65], [-7.5, 54.75], [-7.25, 54.65], [-7.0, 54.75], [-6.75, 54.65], [-6.68, 54.68], [-6.53, 55.03], [-6.0, 55.25], [-5.47, 55.03], [-5.32, 54.68], [-4.97, 54.53], [-4.75, 54.0], [-4.85, 53.75], [-4.75, 53.5], [-4.85, 53.25], [-4.75, 53.0], [-4.85, 52.75], [-4.75, 52.5], [-4.97, 51.97], [-5.32, 51.82], [-5.35, 51.75], [-5.25, 51.5], [-5.35, 51.25], [-5.25, 51.0], [-5.47, 50.47], [-5.82, 50.32], [-5.97, 49.97], [-6.5, 49.75], [-6.75, 49.85], [-6.82, 49.82], [-6.97, 49.47], [-7.32, 49.32], [-7.35, 49.25], [-7.25, 49.0], [-7.35, 48.75], [-7.25, 48.5], [-7.35, 48.25], [-7.25, 48.0], [-7.35, 47.75], [-7.25, 47.5], [-7.47, 46.97], [-8.0, 46.75], [-8.25, 46.85], [-8.32, 46.82], [-8.47, 46.47], [-9.0, 46.25], [-9.25, 46.35], [-9.5, 46.25], [-9.75, 46.35], [-10.0, 46.25], [-10.25, 46.35], [-10.5, 46.25], [-10.75, 46.35], [-11.0, 46.25], [-11.53, 46.47], [-11.68, 46.82], [-11.75, 46.85], [-12.0, 46.75], [-12.25, 46.85], [-12.5, 46.75], [-13.03, 46.97], [-13.25, 47.5], [-13.15, 47.75], [-13.25, 48.0], [-13.03, 48.53]]]]}, "2026-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 48.53], [-12.68, 48.68], [-12.65, 48.75], [-12.75, 49.0], [-12.53, 49.53], [-12.18, 49.68], [-12.15, 49.75], [-12.25, 50.0], [-12.03, 50.53], [-11.68, 50.68], [-11.53, 51.03], [-11.18, 51.18], [-11.03, 51.53], [-10.62, 51.7], [-10.75, 52.0], [-10.53, 52.53], [-10.18, 52.68], [-10.04, 53.0], [-10.25, 53.5], [-10.03, 54.03], [-9.5, 54.25], [-9.25, 54.15], [-9.0, 54.25], [-8.75, 54.15], [-8.68, 54.18], [-8.53, 54.53], [-8.0, 54.75], [-7.75, 54.65], [-7.5, 54.75], [-7.25, 54.65], [-7.0, 54.75], [-6.75, 54.65], [-6.68, 54.68], [-6.53, 55.03], [-6.0, 55.25], [-5.47, 55.03], [-5.32, 54.68], [-4.97, 54.53], [-4.75, 54.0], [-4.85, 53.75], [-4.75, 53.5], [-4.85, 53.25], [-4.75, 53.0], [-4.85, 52.75], [-4.75, 52.5], [-4.97, 51.97], [-5.32, 51.82], [-5.35, 51.75], [-5.25, 51.5], [-5.35, 51.25], [-5.25, 51.0], [-5.47, 50.47], [-5.82, 50.32], [-5.97, 49.97], [-6.5, 49.75], [-6.75, 49.85], [-6.82, 49.82], [-6.97, 49.47], [-7.32, 49.32], [-7.35, 49.25], [-7.25, 49.0], [-7.35, 48.75], [-7.25, 48.5], [-7.35, 48.25], [-7.25, 48.0], [-7.35, 47.75], [-7.25, 47.5], [-7.47, 46.97], [-8.0, 46.75], [-8.25, 46.85], [-8.32, 46.82], [-8.47, 46.47], [-9.0, 46.25], [-9.25, 46.35], [-9.5, 46.25], [-9.75, 46.35], [-10.0, 46.25], [-10.25, 46.35], [-10.5, 46.25], [-10.75, 46.35], [-11.0, 46.25], [-11.53, 46.47], [-11.68, 46.82], [-11.75, 46.85], [-12.0, 46.75], [-12.25, 46.85], [-12.5, 46.75], [-13.03, 46.97], [-13.25, 47.5], [-13.15, 47.75], [-13.25, 48.0], [-13.03, 48.53]]]]}, "2026-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-13.03, 48.53], [-12.68, 48.68], [-12.65, 48.75], [-12.75, 49.0], [-12.53, 49.53], [-12.18, 49.68], [-12.15, 49.75], [-12.25, 50.0], [-12.03, 50.53], [-11.68, 50.68], [-11.53, 51.03], [-11.18, 51.18], [-11.03, 51.53], [-10.62, 51.7], [-10.75, 52.0], [-10.53, 52.53], [-10.18, 52.68], [-10.04, 53.0], [-10.25, 53.5], [-10.03, 54.03], [-9.5, 54.25], [-9.25, 54.15], [-9.0, 54.25], [-8.75, 54.15], [-8.68, 54.18], [-8.53, 54.53], [-8.0, 54.75], [-7.75, 54.65], [-7.5, 54.75], [-7.25, 54.65], [-7.0, 54.75], [-6.75, 54.65], [-6.68, 54.68], [-6.53, 55.03], [-6.0, 55.25], [-5.47, 55.03], [-5.32, 54.68], [-4.97, 54.53], [-4.75, 54.0], [-4.85, 53.75], [-4.75, 53.5], [-4.85, 53.25], [-4.75, 53.0], [-4.85, 52.75], [-4.75, 52.5], [-4.97, 51.97], [-5.32, 51.82], [-5.35, 51.75], [-5.25, 51.5], [-5.35, 51.25], [-5.25, 51.0], [-5.47, 50.47], [-5.82, 50.32], [-5.97, 49.97], [-6.5, 49.75], [-6.75, 49.85], [-6.82, 49.82], [-6.97, 49.47], [-7.32, 49.32], [-7.35, 49.25], [-7.25, 49.0], [-7.35, 48.75], [-7.25, 48.5], [-7.35, 48.25], [-7.25, 48.0], [-7.35, 47.75], [-7.25, 47.5], [-7.47, 46.97], [-8.0, 46.75], [-8.25, 46.85], [-8.32, 46.82], [-8.47, 46.47], [-9.0, 46.25], [-9.25, 46.35], [-9.5, 46.25], [-9.75, 46.35], [-10.0, 46.25], [-10.25, 46.35], [-10.5, 46.25], [-10.75, 46.35], [-11.0, 46.25], [-11.53, 46.47], [-11.68, 46.82], [-11.75, 46.85], [-12.0, 46.75], [-12.25, 46.85], [-12.5, 46.75], [-13.03, 46.97], [-13.25, 47.5], [-13.15, 47.75], [-13.25, 48.0], [-13.03, 48.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.751860984443624}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.5829724301570725}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.2310297648112396, 5.384344501984458, 5.305132254576051, 5.221281022291919]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.2310297648112396, -1.0032193501789948, -1.1663383483886491, -1.7068377176920535]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.135091009852317, -3.4882530074944005, -3.582236280062558, -3.674180936916604]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.135091009852317, -6.4319899326597465, -6.382753586209162, -6.751860984443624]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4848341263381124, -1.602880522727256, -1.6499046954123198, -1.692089837751736]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4848341263381124, -2.2821489964242514, -2.178225760455349, -2.331234050464668]}}