{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:05.807958", "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": "2015-Jan-17_to_2015-Jan-22_355.0_56.5"}, "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": 2015010000831}, "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 17 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 22 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 60465.61424314866}, "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": ["United Kingdom"]}, "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": ["Inner Seas off the West Coast of Scotland", "Irish Sea and St. George's Channel", "North Sea"]}, "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": 56.5}, "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": 355.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "355.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 353.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 358.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.03, 55.97], [-6.25, 56.5], [-6.03, 57.03], [-5.5, 57.25], [-5.25, 57.15], [-5.0, 57.25], [-4.47, 57.03], [-4.25, 56.5], [-4.47, 55.97], [-5.0, 55.75], [-5.25, 55.85], [-5.5, 55.75], [-6.03, 55.97]]]]}, "2015-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.03, 55.97], [-6.25, 56.5], [-6.03, 57.03], [-5.5, 57.25], [-5.25, 57.15], [-5.0, 57.25], [-4.47, 57.03], [-4.25, 56.5], [-4.43, 56.07], [-4.0, 56.25], [-3.75, 56.15], [-3.5, 56.25], [-2.97, 56.03], [-2.75, 55.5], [-2.97, 54.97], [-3.5, 54.75], [-3.75, 54.85], [-4.0, 54.75], [-4.53, 54.97], [-4.75, 55.5], [-4.57, 55.93], [-5.0, 55.75], [-5.25, 55.85], [-5.5, 55.75], [-6.03, 55.97]]]]}, "2015-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.75, 57.0], [-6.53, 57.53], [-6.0, 57.75], [-5.75, 57.65], [-5.68, 57.68], [-5.53, 58.03], [-5.0, 58.25], [-4.5, 58.04], [-4.0, 58.25], [-3.75, 58.15], [-3.5, 58.25], [-3.25, 58.15], [-3.0, 58.25], [-2.47, 58.03], [-2.25, 57.5], [-2.35, 57.25], [-2.25, 57.0], [-2.47, 56.47], [-2.82, 56.32], [-2.85, 56.25], 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[-2.82, 54.82], [-2.97, 54.47], [-3.32, 54.32], [-3.35, 54.25], [-3.25, 54.0], [-3.47, 53.47], [-4.0, 53.25], [-4.25, 53.35], [-4.5, 53.25], [-4.75, 53.35], [-5.0, 53.25], [-5.53, 53.47], [-5.75, 54.0], [-5.54, 54.5], [-5.75, 55.0], [-5.65, 55.25], [-5.75, 55.5], [-5.65, 55.75], [-5.68, 55.82], [-6.03, 55.97], [-6.18, 56.32], [-6.53, 56.47], [-6.75, 57.0]]]]}, "2015-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-6.75, 57.0], [-6.53, 57.53], [-6.0, 57.75], [-5.75, 57.65], [-5.68, 57.68], [-5.53, 58.03], [-5.0, 58.25], [-4.5, 58.04], [-4.0, 58.25], [-3.75, 58.15], [-3.5, 58.25], [-3.25, 58.15], [-3.0, 58.25], [-2.47, 58.03], [-2.25, 57.5], [-2.35, 57.25], [-2.25, 57.0], [-2.47, 56.47], [-2.82, 56.32], [-2.85, 56.25], [-2.82, 56.18], [-2.75, 56.15], [-2.5, 56.25], [-2.25, 56.15], [-2.0, 56.25], [-1.47, 56.03], [-1.25, 55.5], [-1.47, 54.97], [-2.0, 54.75], [-2.25, 54.85], [-2.5, 54.75], [-2.75, 54.85], [-2.82, 54.82], [-2.97, 54.47], [-3.32, 54.32], [-3.35, 54.25], 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[-6.25, 57.0]], [[-3.25, 56.35], [-3.5, 56.25], [-3.25, 56.15], [-3.0, 56.25], [-3.25, 56.35]], [[-3.75, 56.35], [-4.0, 56.25], [-3.75, 56.15], [-3.5, 56.25], [-3.75, 56.35]], [[-4.25, 56.35], [-4.32, 56.32], [-4.43, 56.07], [-4.0, 56.25], [-4.25, 56.35]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.591041245763847}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.6696916863512765}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-1.3113060708481044, -0.8429874153416677, -2.143465480968757, -0.6487227006258536, -0.07794309093907259, -1.277190978451415]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.146128391081106, -1.7251314847616186, -7.259368807663179, -5.556930582203904, -4.526121138515407, 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anomalies.", "value": [-1.829646855100038, -1.5707615282135592, -3.3720186334640605, -2.324276510086015, -2.160248646748074, -1.8059973237001796]}}