{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:37.173362", "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": "2021-May-27_to_2021-May-30_275.0_43.5"}, "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": 2021050001072}, "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": "May 27 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 30 2021"}, "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": 85371.34821949928}, "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": ["Canada", "United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "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": []}, "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": 43.5}, "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": 275.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "275.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 273.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 278.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-86.65, 44.25], [-86.75, 44.5], [-86.53, 45.03], [-86.0, 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[-83.18, 42.68]]]]}, "2021-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-85.65, 43.25], [-85.75, 43.5], [-85.53, 44.03], [-85.0, 44.25], [-84.75, 44.15], [-84.68, 44.18], [-84.53, 44.53], [-84.0, 44.75], [-83.47, 44.53], [-83.32, 44.18], [-82.97, 44.03], [-82.75, 43.5], [-82.93, 43.07], [-82.68, 43.18], [-82.53, 43.53], [-82.0, 43.75], [-81.47, 43.53], [-81.25, 43.0], [-81.47, 42.47], [-81.82, 42.32], [-81.97, 41.97], [-82.32, 41.82], [-82.35, 41.75], [-82.25, 41.5], [-82.47, 40.97], [-83.0, 40.75], [-83.25, 40.85], [-83.32, 40.82], [-83.47, 40.47], [-84.0, 40.25], [-84.25, 40.35], [-84.5, 40.25], [-85.03, 40.47], [-85.25, 41.0], [-85.03, 41.53], [-84.68, 41.68], [-84.62, 41.8], [-84.75, 41.85], [-85.0, 41.75], [-85.53, 41.97], [-85.75, 42.5], [-85.65, 42.75], [-85.75, 43.0], [-85.65, 43.25]], [[-83.25, 42.65], [-83.18, 42.68], [-83.07, 42.93], [-83.32, 42.82], [-83.35, 42.75], [-83.32, 42.68], [-83.25, 42.65]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.097488823654885}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.16016244966544}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.641818293262247, 7.931166459197982, 9.581630842690743, 12.211229937452742]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.5229490612444465, 5.564904003071433, 8.218204936859252, 11.156776846591924]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.679202660361819, -8.468772744169055, -6.941044170882219, -5.538079226891993]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.523147220357998, -10.097488823654885, -8.577107624499035, -6.145440681353193]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5107916108630406, -1.9994918160829667, -1.6819226894276138, -1.3639293199395381]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7474212702459015, -2.3189594368525164, -2.1711994109085744, -1.5619910617484551]}}