{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:34:53.163843", "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-Apr-22_to_2023-Apr-25_18.5_69.0"}, "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": 2023040000753}, "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": "April 22 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 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": 116596.29114279005}, "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": ["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": ["Norwegian 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": 69.0}, "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": 18.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "18.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 6.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 20.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.97, 68.53], [6.32, 68.68], [6.47, 69.03], [7.0, 69.25], [7.25, 69.15], [7.5, 69.25], [7.75, 69.15], [8.0, 69.25], [8.25, 69.15], [8.5, 69.25], [9.03, 69.03], [9.18, 68.68], [9.25, 68.65], [9.32, 68.68], [9.47, 69.03], [10.0, 69.25], [10.25, 69.15], [10.5, 69.25], [10.75, 69.15], [11.0, 69.25], [11.25, 69.15], [11.32, 69.18], [11.47, 69.53], [12.0, 69.75], [12.25, 69.65], [12.5, 69.75], [12.75, 69.65], [13.0, 69.75], [13.25, 69.65], [13.32, 69.68], [13.47, 70.03], [13.82, 70.18], [13.97, 70.53], [14.5, 70.75], [14.75, 70.65], [15.0, 70.75], [15.25, 70.65], [15.5, 70.75], [15.75, 70.65], [16.0, 70.75], [16.25, 70.65], [16.5, 70.75], [16.75, 70.65], [17.0, 70.75], [17.53, 70.53], [17.75, 70.0], [17.63, 69.7], [17.75, 69.65], [18.0, 69.75], [18.25, 69.65], [18.5, 69.75], [18.75, 69.65], [19.0, 69.75], [19.25, 69.65], [19.5, 69.75], [20.03, 69.53], [20.25, 69.0], [20.03, 68.47], [19.5, 68.25], [19.25, 68.35], [19.0, 68.25], [18.75, 68.35], [18.68, 68.32], [18.53, 67.97], [18.0, 67.75], [17.75, 67.85], [17.5, 67.75], [17.25, 67.85], [17.0, 67.75], [16.75, 67.85], [16.68, 67.82], [16.53, 67.47], [16.0, 67.25], [15.75, 67.35], [15.5, 67.25], [15.25, 67.35], [15.0, 67.25], [14.75, 67.35], [14.68, 67.32], [14.53, 66.97], [14.0, 66.75], [13.75, 66.85], [13.68, 66.82], [13.53, 66.47], [13.0, 66.25], [12.75, 66.35], [12.5, 66.25], [12.25, 66.35], [12.0, 66.25], [11.75, 66.35], [11.5, 66.25], [11.25, 66.35], [11.0, 66.25], [10.75, 66.35], [10.5, 66.25], [10.25, 66.35], [10.0, 66.25], [9.75, 66.35], [9.5, 66.25], [9.25, 66.35], [9.0, 66.25], [8.47, 66.47], [8.32, 66.82], [8.25, 66.85], [8.18, 66.82], [8.03, 66.47], [7.5, 66.25], [6.97, 66.47], [6.82, 66.82], [6.75, 66.85], [6.5, 66.75], [5.97, 66.97], [5.75, 67.5], [5.85, 67.75], [5.75, 68.0], [5.97, 68.53]]]]}, "2023-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.97, 68.53], [6.32, 68.68], [6.47, 69.03], [7.0, 69.25], [7.25, 69.15], [7.5, 69.25], [7.75, 69.15], [8.0, 69.25], [8.25, 69.15], [8.5, 69.25], [9.03, 69.03], [9.18, 68.68], [9.25, 68.65], [9.32, 68.68], [9.47, 69.03], [10.0, 69.25], [10.25, 69.15], [10.5, 69.25], [10.75, 69.15], [11.0, 69.25], [11.25, 69.15], [11.32, 69.18], [11.47, 69.53], [12.0, 69.75], [12.25, 69.65], [12.5, 69.75], [12.75, 69.65], [13.0, 69.75], [13.25, 69.65], [13.32, 69.68], [13.47, 70.03], [13.82, 70.18], [13.97, 70.53], [14.5, 70.75], [14.75, 70.65], [15.0, 70.75], [15.25, 70.65], [15.5, 70.75], [15.75, 70.65], [16.0, 70.75], [16.25, 70.65], [16.5, 70.75], [16.75, 70.65], [17.0, 70.75], [17.53, 70.53], [17.75, 70.0], [17.63, 69.7], [17.75, 69.65], [18.0, 69.75], [18.25, 69.65], [18.5, 69.75], [18.75, 69.65], [19.0, 69.75], [19.25, 69.65], [19.5, 69.75], [19.75, 69.65], [20.0, 69.75], [20.25, 69.65], [20.5, 69.75], [21.03, 69.53], [21.25, 69.0], [21.03, 68.47], [20.5, 68.25], [20.25, 68.35], [20.0, 68.25], [19.75, 68.35], [19.68, 68.32], [19.65, 68.25], [19.75, 68.0], [19.53, 67.47], [19.0, 67.25], [18.75, 67.35], [18.68, 67.32], [18.53, 66.97], [18.0, 66.75], [17.75, 66.85], [17.5, 66.75], [16.97, 66.97], [16.75, 67.5], [16.88, 67.8], [16.75, 67.85], [16.68, 67.82], [16.53, 67.47], [16.0, 67.25], [15.75, 67.35], [15.5, 67.25], [15.25, 67.35], [15.0, 67.25], [14.75, 67.35], [14.68, 67.32], [14.53, 66.97], [14.0, 66.75], [13.75, 66.85], [13.68, 66.82], [13.53, 66.47], [13.0, 66.25], [12.75, 66.35], [12.5, 66.25], [12.25, 66.35], [12.0, 66.25], [11.75, 66.35], [11.5, 66.25], [11.25, 66.35], [11.0, 66.25], [10.75, 66.35], [10.5, 66.25], [10.25, 66.35], [10.0, 66.25], [9.75, 66.35], [9.5, 66.25], [9.25, 66.35], [9.0, 66.25], [8.47, 66.47], [8.32, 66.82], [8.25, 66.85], [8.18, 66.82], [8.03, 66.47], [7.5, 66.25], [6.97, 66.47], [6.82, 66.82], [6.75, 66.85], [6.5, 66.75], [5.97, 66.97], [5.75, 67.5], [5.85, 67.75], [5.75, 68.0], [5.97, 68.53]]]]}, "2023-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[5.97, 68.53], [6.32, 68.68], [6.47, 69.03], [7.0, 69.25], [7.25, 69.15], [7.5, 69.25], [7.75, 69.15], [8.0, 69.25], [8.25, 69.15], [8.5, 69.25], [9.03, 69.03], [9.18, 68.68], [9.25, 68.65], [9.32, 68.68], [9.47, 69.03], [10.0, 69.25], [10.25, 69.15], [10.5, 69.25], [10.75, 69.15], [11.0, 69.25], [11.25, 69.15], [11.32, 69.18], [11.47, 69.53], [12.0, 69.75], [12.25, 69.65], [12.5, 69.75], [12.75, 69.65], [13.0, 69.75], [13.25, 69.65], [13.32, 69.68], [13.47, 70.03], [13.82, 70.18], [13.97, 70.53], [14.5, 70.75], [14.75, 70.65], [15.0, 70.75], [15.25, 70.65], [15.5, 70.75], [15.75, 70.65], [16.0, 70.75], [16.25, 70.65], [16.5, 70.75], [16.75, 70.65], [17.0, 70.75], [17.53, 70.53], [17.75, 70.0], [17.63, 69.7], [17.75, 69.65], [18.0, 69.75], [18.25, 69.65], [18.5, 69.75], [18.75, 69.65], [19.0, 69.75], [19.25, 69.65], [19.5, 69.75], [19.75, 69.65], [20.0, 69.75], [20.25, 69.65], [20.5, 69.75], [21.03, 69.53], [21.25, 69.0], [21.03, 68.47], [20.5, 68.25], [20.25, 68.35], [20.0, 68.25], [19.75, 68.35], [19.68, 68.32], [19.65, 68.25], [19.75, 68.0], [19.53, 67.47], [19.0, 67.25], [18.75, 67.35], [18.68, 67.32], [18.53, 66.97], [18.0, 66.75], [17.75, 66.85], [17.5, 66.75], [16.97, 66.97], [16.75, 67.5], [16.88, 67.8], [16.75, 67.85], [16.68, 67.82], [16.53, 67.47], [16.0, 67.25], [15.75, 67.35], [15.5, 67.25], [15.25, 67.35], [15.0, 67.25], [14.75, 67.35], [14.68, 67.32], [14.53, 66.97], [14.0, 66.75], [13.75, 66.85], [13.68, 66.82], [13.53, 66.47], [13.0, 66.25], [12.75, 66.35], [12.5, 66.25], [12.25, 66.35], [12.0, 66.25], [11.75, 66.35], [11.5, 66.25], [11.25, 66.35], [11.0, 66.25], [10.75, 66.35], [10.5, 66.25], [10.25, 66.35], [10.0, 66.25], [9.75, 66.35], [9.5, 66.25], [9.25, 66.35], [9.0, 66.25], [8.47, 66.47], [8.32, 66.82], [8.25, 66.85], [8.18, 66.82], [8.03, 66.47], [7.5, 66.25], [6.97, 66.47], [6.82, 66.82], [6.75, 66.85], [6.5, 66.75], [5.97, 66.97], [5.75, 67.5], [5.85, 67.75], [5.75, 68.0], [5.97, 68.53]]]]}, "2023-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[14.47, 67.97], [14.25, 68.5], [14.47, 69.03], [15.0, 69.25], [15.25, 69.15], [15.5, 69.25], [15.75, 69.15], [16.0, 69.25], [16.25, 69.15], [16.5, 69.25], [16.75, 69.15], [16.82, 69.18], [16.97, 69.53], [17.5, 69.75], [17.75, 69.65], [18.0, 69.75], [18.25, 69.65], [18.5, 69.75], [18.75, 69.65], [19.0, 69.75], [19.25, 69.65], [19.5, 69.75], [19.75, 69.65], [20.0, 69.75], [20.25, 69.65], [20.5, 69.75], [21.03, 69.53], [21.25, 69.0], [21.03, 68.47], [20.5, 68.25], [20.25, 68.35], [20.0, 68.25], [19.75, 68.35], [19.68, 68.32], [19.65, 68.25], [19.75, 68.0], [19.53, 67.47], [19.0, 67.25], [18.75, 67.35], [18.68, 67.32], [18.53, 66.97], [18.0, 66.75], [17.75, 66.85], [17.5, 66.75], [16.97, 66.97], [16.75, 67.5], [16.88, 67.8], [16.75, 67.85], [16.5, 67.75], [16.25, 67.85], [16.0, 67.75], [15.75, 67.85], [15.5, 67.75], [15.25, 67.85], [15.0, 67.75], [14.47, 67.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.97949433657152}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.8490240959842192}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.3943173444952208, -0.9635705191216744, -0.050044596931229535, -4.492325945585776]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.45954328474744, -9.130153529939719, -10.601538746042593, -7.730438894145266]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.386904314902849, -4.360526441683148, -3.5346597015783896, -5.015583515471843]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.040193184748375, -6.332503920891725, -7.97949433657152, -6.762387343998341]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.719358871240692, -2.108686124154349, -1.6212384112958205, -1.657114460365261]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1083780591890187, -2.4539485540832837, -2.309190162678651, -2.2518942994512194]}}