{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:39.343653", "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": "2017-Apr-21_to_2017-Apr-25_349.5_74.0"}, "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": 2017040000611}, "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 21 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 25 2017"}, "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": 148624.2597635646}, "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": ["Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": ["Greenland 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": 74.0}, "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": 349.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "349.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 331.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 349.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 68.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 74.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-16.0, 71.75], [-15.47, 71.53], [-15.25, 71.0], [-15.47, 70.47], [-16.0, 70.25], [-16.53, 70.47], [-16.75, 71.0], [-16.53, 71.53], [-16.0, 71.75]]]]}, "2017-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-29.25, 71.0], [-29.03, 71.53], [-28.68, 71.68], [-28.65, 71.75], [-28.75, 72.0], [-28.53, 72.53], [-28.12, 72.7], [-28.25, 73.0], [-28.15, 73.25], [-28.25, 73.5], [-28.03, 74.03], [-27.5, 74.25], [-27.25, 74.15], [-27.0, 74.25], [-26.75, 74.15], [-26.5, 74.25], [-25.97, 74.03], [-25.82, 73.68], [-25.47, 73.53], [-25.25, 73.0], [-25.35, 72.75], [-25.32, 72.68], [-25.25, 72.65], [-25.0, 72.75], [-24.75, 72.65], [-24.5, 72.75], [-24.25, 72.65], [-24.18, 72.68], [-24.03, 73.03], [-23.5, 73.25], [-23.25, 73.15], [-23.18, 73.18], [-23.15, 73.25], [-23.25, 73.5], [-23.03, 74.03], [-22.5, 74.25], [-22.25, 74.15], [-22.0, 74.25], [-21.75, 74.15], [-21.5, 74.25], [-20.97, 74.03], [-20.82, 73.68], [-20.75, 73.65], [-20.5, 73.75], [-19.97, 73.53], [-19.82, 73.18], [-19.47, 73.03], [-19.32, 72.68], [-19.25, 72.65], [-19.0, 72.75], [-18.75, 72.65], [-18.5, 72.75], [-17.97, 72.53], [-17.82, 72.18], [-17.75, 72.15], [-17.5, 72.25], [-16.97, 72.03], [-16.82, 71.68], [-16.75, 71.65], [-16.68, 71.68], [-16.65, 71.75], [-16.75, 72.0], [-16.53, 72.53], [-16.0, 72.75], [-15.75, 72.65], [-15.5, 72.75], [-15.25, 72.65], [-15.18, 72.68], [-15.03, 73.03], [-14.68, 73.18], [-14.53, 73.53], [-14.18, 73.68], [-14.03, 74.03], [-13.5, 74.25], [-13.25, 74.15], [-13.18, 74.18], [-13.03, 74.53], [-12.5, 74.75], [-12.25, 74.65], [-12.0, 74.75], [-11.75, 74.65], [-11.5, 74.75], [-11.25, 74.65], [-11.0, 74.75], [-10.75, 74.65], [-10.5, 74.75], [-9.97, 74.53], [-9.75, 74.0], [-9.97, 73.47], [-10.32, 73.32], [-10.47, 72.97], [-10.82, 72.82], [-10.97, 72.47], [-11.32, 72.32], [-11.47, 71.97], [-12.0, 71.75], [-12.25, 71.85], [-12.32, 71.82], [-12.47, 71.47], [-12.82, 71.32], [-12.97, 70.97], [-13.5, 70.75], [-13.75, 70.85], [-14.0, 70.75], [-14.25, 70.85], [-14.5, 70.75], [-14.75, 70.85], [-15.0, 70.75], [-15.25, 70.85], [-15.32, 70.82], [-15.47, 70.47], [-16.0, 70.25], [-16.25, 70.35], [-16.32, 70.32], [-16.47, 69.97], [-17.0, 69.75], [-17.25, 69.85], [-17.5, 69.75], [-17.75, 69.85], [-18.0, 69.75], [-18.25, 69.85], [-18.32, 69.82], [-18.47, 69.47], [-19.0, 69.25], [-19.25, 69.35], [-19.5, 69.25], [-19.75, 69.35], [-20.0, 69.25], [-20.25, 69.35], [-20.5, 69.25], [-21.0, 69.46], [-21.32, 69.32], [-21.47, 68.97], [-22.0, 68.75], [-22.25, 68.85], [-22.5, 68.75], [-22.75, 68.85], [-23.0, 68.75], [-23.25, 68.85], [-23.5, 68.75], [-23.75, 68.85], [-23.82, 68.82], [-23.97, 68.47], [-24.5, 68.25], [-24.75, 68.35], [-25.0, 68.25], [-25.25, 68.35], [-25.5, 68.25], [-25.75, 68.35], [-26.0, 68.25], [-26.53, 68.47], [-26.75, 69.0], [-26.57, 69.43], [-27.0, 69.25], [-27.25, 69.35], [-27.5, 69.25], [-28.03, 69.47], [-28.18, 69.82], [-28.53, 69.97], [-28.68, 70.32], [-29.03, 70.47], [-29.25, 71.0]], [[-24.54, 70.0], [-24.68, 70.32], [-24.75, 70.35], [-25.0, 70.25], [-25.53, 70.47], [-25.75, 71.0], [-25.65, 71.25], [-25.68, 71.32], [-25.75, 71.35], [-25.82, 71.32], [-25.97, 70.97], [-26.32, 70.82], [-26.35, 70.75], [-26.25, 70.5], [-26.35, 70.25], [-26.25, 70.0], [-26.43, 69.57], [-26.0, 69.75], [-25.75, 69.65], [-25.5, 69.75], [-25.25, 69.65], [-25.0, 69.75], [-24.75, 69.65], [-24.68, 69.68], [-24.54, 70.0]]]]}, "2017-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-29.25, 71.0], [-29.03, 71.53], [-28.68, 71.68], [-28.65, 71.75], [-28.75, 72.0], [-28.53, 72.53], [-28.12, 72.7], [-28.25, 73.0], [-28.15, 73.25], [-28.25, 73.5], [-28.03, 74.03], [-27.5, 74.25], [-27.25, 74.15], [-27.0, 74.25], [-26.75, 74.15], [-26.5, 74.25], [-25.97, 74.03], [-25.82, 73.68], [-25.47, 73.53], [-25.25, 73.0], [-25.35, 72.75], [-25.32, 72.68], [-25.25, 72.65], [-25.0, 72.75], [-24.75, 72.65], [-24.5, 72.75], [-24.25, 72.65], [-24.18, 72.68], [-24.03, 73.03], [-23.5, 73.25], [-23.25, 73.15], [-23.18, 73.18], [-23.15, 73.25], [-23.25, 73.5], [-23.03, 74.03], [-22.5, 74.25], [-22.25, 74.15], [-22.0, 74.25], [-21.75, 74.15], [-21.5, 74.25], [-20.97, 74.03], [-20.82, 73.68], [-20.75, 73.65], [-20.5, 73.75], [-19.97, 73.53], [-19.82, 73.18], [-19.47, 73.03], [-19.32, 72.68], [-19.25, 72.65], [-19.0, 72.75], [-18.75, 72.65], [-18.5, 72.75], [-17.97, 72.53], [-17.82, 72.18], [-17.75, 72.15], [-17.5, 72.25], [-16.97, 72.03], [-16.82, 71.68], [-16.75, 71.65], [-16.68, 71.68], [-16.65, 71.75], [-16.75, 72.0], [-16.53, 72.53], [-16.0, 72.75], [-15.75, 72.65], [-15.5, 72.75], [-15.25, 72.65], [-15.18, 72.68], [-15.03, 73.03], [-14.68, 73.18], [-14.53, 73.53], [-14.18, 73.68], [-14.03, 74.03], [-13.5, 74.25], [-13.25, 74.15], [-13.18, 74.18], [-13.03, 74.53], [-12.5, 74.75], [-12.25, 74.65], [-12.0, 74.75], [-11.75, 74.65], [-11.5, 74.75], [-11.25, 74.65], [-11.0, 74.75], [-10.75, 74.65], [-10.5, 74.75], [-9.97, 74.53], [-9.75, 74.0], [-9.97, 73.47], [-10.32, 73.32], [-10.47, 72.97], [-10.82, 72.82], [-10.97, 72.47], [-11.32, 72.32], [-11.47, 71.97], [-12.0, 71.75], [-12.25, 71.85], [-12.32, 71.82], [-12.47, 71.47], [-12.82, 71.32], [-12.97, 70.97], [-13.5, 70.75], [-13.75, 70.85], [-14.0, 70.75], [-14.25, 70.85], [-14.5, 70.75], [-14.75, 70.85], [-15.0, 70.75], [-15.25, 70.85], [-15.32, 70.82], [-15.47, 70.47], [-16.0, 70.25], [-16.25, 70.35], [-16.32, 70.32], [-16.47, 69.97], [-17.0, 69.75], [-17.25, 69.85], [-17.5, 69.75], [-17.75, 69.85], [-18.0, 69.75], [-18.25, 69.85], [-18.32, 69.82], [-18.47, 69.47], [-19.0, 69.25], [-19.25, 69.35], [-19.5, 69.25], [-19.75, 69.35], [-20.0, 69.25], [-20.25, 69.35], [-20.5, 69.25], [-21.0, 69.46], [-21.32, 69.32], [-21.47, 68.97], [-22.0, 68.75], [-22.25, 68.85], [-22.5, 68.75], [-22.75, 68.85], [-23.0, 68.75], [-23.25, 68.85], [-23.5, 68.75], [-23.75, 68.85], [-23.82, 68.82], [-23.97, 68.47], [-24.5, 68.25], [-24.75, 68.35], [-25.0, 68.25], [-25.25, 68.35], [-25.5, 68.25], [-25.75, 68.35], [-26.0, 68.25], [-26.53, 68.47], [-26.75, 69.0], [-26.57, 69.43], [-27.0, 69.25], [-27.25, 69.35], [-27.5, 69.25], [-28.03, 69.47], [-28.18, 69.82], [-28.53, 69.97], [-28.68, 70.32], [-29.03, 70.47], [-29.25, 71.0]], [[-24.54, 70.0], [-24.68, 70.32], [-24.75, 70.35], [-25.0, 70.25], [-25.53, 70.47], [-25.75, 71.0], [-25.65, 71.25], [-25.68, 71.32], [-25.75, 71.35], [-25.82, 71.32], [-25.97, 70.97], [-26.32, 70.82], [-26.35, 70.75], [-26.25, 70.5], [-26.35, 70.25], [-26.25, 70.0], [-26.43, 69.57], [-26.0, 69.75], [-25.75, 69.65], [-25.5, 69.75], [-25.25, 69.65], [-25.0, 69.75], [-24.75, 69.65], [-24.68, 69.68], [-24.54, 70.0]]]]}, "2017-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-29.25, 71.0], [-29.03, 71.53], [-28.68, 71.68], [-28.65, 71.75], [-28.75, 72.0], [-28.53, 72.53], [-28.12, 72.7], [-28.25, 73.0], [-28.15, 73.25], [-28.25, 73.5], [-28.03, 74.03], [-27.5, 74.25], [-27.25, 74.15], [-27.0, 74.25], [-26.75, 74.15], [-26.5, 74.25], [-25.97, 74.03], [-25.82, 73.68], [-25.47, 73.53], [-25.25, 73.0], [-25.35, 72.75], [-25.32, 72.68], [-25.25, 72.65], [-25.0, 72.75], [-24.75, 72.65], [-24.5, 72.75], [-24.25, 72.65], [-24.18, 72.68], [-24.03, 73.03], [-23.5, 73.25], [-23.25, 73.15], [-23.18, 73.18], [-23.15, 73.25], [-23.25, 73.5], [-23.03, 74.03], [-22.5, 74.25], [-22.25, 74.15], [-22.0, 74.25], [-21.75, 74.15], [-21.5, 74.25], [-20.97, 74.03], [-20.82, 73.68], [-20.75, 73.65], [-20.5, 73.75], [-19.97, 73.53], [-19.82, 73.18], [-19.47, 73.03], [-19.32, 72.68], [-19.25, 72.65], [-19.0, 72.75], [-18.75, 72.65], [-18.5, 72.75], [-17.97, 72.53], [-17.82, 72.18], [-17.75, 72.15], [-17.5, 72.25], [-16.97, 72.03], [-16.82, 71.68], [-16.75, 71.65], [-16.68, 71.68], [-16.65, 71.75], [-16.75, 72.0], [-16.53, 72.53], [-16.0, 72.75], [-15.75, 72.65], [-15.5, 72.75], [-15.25, 72.65], [-15.18, 72.68], [-15.03, 73.03], [-14.68, 73.18], [-14.53, 73.53], [-14.18, 73.68], [-14.03, 74.03], [-13.5, 74.25], [-13.25, 74.15], [-13.18, 74.18], [-13.03, 74.53], [-12.5, 74.75], [-12.25, 74.65], [-12.0, 74.75], [-11.75, 74.65], [-11.5, 74.75], [-11.25, 74.65], [-11.0, 74.75], [-10.75, 74.65], [-10.5, 74.75], [-9.97, 74.53], [-9.75, 74.0], [-9.97, 73.47], [-10.32, 73.32], [-10.47, 72.97], [-10.82, 72.82], [-10.97, 72.47], [-11.32, 72.32], [-11.47, 71.97], [-12.0, 71.75], [-12.25, 71.85], [-12.32, 71.82], [-12.47, 71.47], [-12.82, 71.32], [-12.97, 70.97], [-13.5, 70.75], [-13.75, 70.85], [-14.0, 70.75], [-14.25, 70.85], [-14.5, 70.75], [-14.75, 70.85], [-15.0, 70.75], [-15.25, 70.85], [-15.5, 70.75], [-15.75, 70.85], [-15.82, 70.82], [-15.97, 70.47], [-16.32, 70.32], [-16.47, 69.97], [-17.0, 69.75], [-17.25, 69.85], [-17.5, 69.75], [-17.75, 69.85], [-18.0, 69.75], [-18.25, 69.85], [-18.32, 69.82], [-18.47, 69.47], [-19.0, 69.25], [-19.25, 69.35], [-19.5, 69.25], [-19.75, 69.35], [-20.0, 69.25], [-20.25, 69.35], [-20.5, 69.25], [-21.0, 69.46], [-21.32, 69.32], [-21.47, 68.97], [-22.0, 68.75], [-22.25, 68.85], [-22.5, 68.75], [-22.75, 68.85], [-23.0, 68.75], [-23.25, 68.85], [-23.5, 68.75], [-23.75, 68.85], [-23.82, 68.82], [-23.97, 68.47], [-24.5, 68.25], [-24.75, 68.35], [-25.0, 68.25], [-25.25, 68.35], [-25.5, 68.25], [-25.75, 68.35], [-26.0, 68.25], [-26.53, 68.47], [-26.75, 69.0], [-26.57, 69.43], [-27.0, 69.25], [-27.25, 69.35], [-27.5, 69.25], [-28.03, 69.47], [-28.18, 69.82], [-28.53, 69.97], [-28.68, 70.32], [-29.03, 70.47], [-29.25, 71.0]], [[-24.54, 70.0], [-24.68, 70.32], [-24.75, 70.35], [-25.0, 70.25], [-25.53, 70.47], [-25.75, 71.0], [-25.65, 71.25], [-25.68, 71.32], [-25.75, 71.35], [-25.82, 71.32], [-25.97, 70.97], [-26.32, 70.82], [-26.35, 70.75], [-26.25, 70.5], [-26.35, 70.25], [-26.25, 70.0], [-26.43, 69.57], [-26.0, 69.75], [-25.75, 69.65], [-25.5, 69.75], [-25.25, 69.65], [-25.0, 69.75], [-24.75, 69.65], [-24.68, 69.68], [-24.54, 70.0]]]]}, "2017-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-23.03, 69.47], [-23.25, 70.0], [-23.03, 70.53], [-22.5, 70.75], [-21.97, 70.53], [-21.75, 70.0], [-21.97, 69.47], [-22.5, 69.25], [-23.03, 69.47]]], [[[-23.03, 72.53], [-22.5, 72.75], [-22.25, 72.65], [-22.0, 72.75], [-21.75, 72.65], [-21.68, 72.68], [-21.53, 73.03], [-21.0, 73.25], [-20.47, 73.03], [-20.32, 72.68], [-19.97, 72.53], [-19.75, 72.0], [-19.97, 71.47], [-20.5, 71.25], [-20.75, 71.35], [-21.0, 71.25], [-21.25, 71.35], [-21.5, 71.25], [-21.75, 71.35], [-22.0, 71.25], [-22.25, 71.35], [-22.5, 71.25], [-23.03, 71.47], [-23.25, 72.0], [-23.03, 72.53]]], [[[-13.03, 74.53], [-12.5, 74.75], [-12.25, 74.65], [-12.0, 74.75], [-11.75, 74.65], [-11.5, 74.75], [-11.25, 74.65], [-11.0, 74.75], [-10.75, 74.65], [-10.5, 74.75], [-9.97, 74.53], [-9.75, 74.0], [-9.97, 73.47], [-10.5, 73.25], [-10.75, 73.35], [-11.0, 73.25], [-11.25, 73.35], [-11.5, 73.25], [-11.75, 73.35], [-12.0, 73.25], [-12.25, 73.35], [-12.5, 73.25], [-13.03, 73.47], [-13.25, 74.0], [-13.03, 74.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.867460599894684}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.889604483562589}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-8.554991071978122, -14.928751146524746, -15.137581955213022, -14.328803996764293, -12.493107490206967]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-8.554991071978122, -26.410089631210354, -26.65062496578858, -25.431485196618127, -15.081184055629421]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.878594294147547, -6.051263537730962, -6.210103882958134, -5.495291161851686, -4.87485680946808]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.878594294147547, -7.377695089121914, -8.867460599894684, -6.969455165243858, -5.351762043632675]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5232456071818674, -1.600714178318101, -1.670450698871586, -1.5131365100117466, -1.3602740260315123]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5232456071818674, -1.9506079922393964, -2.224824141715044, -2.225600607878353, -1.5552080719379058]}}