{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:42.582864", "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-30_to_2021-Jun-01_281.0_34.5"}, "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": 2021050001167}, "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 30 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 01 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 64569.133946534}, "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 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": ["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": 34.5}, "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": 281.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "281.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 277.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 281.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 32.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.53, 33.53], [-82.0, 33.75], [-81.75, 33.65], [-81.68, 33.68], [-81.65, 33.75], [-81.75, 34.0], [-81.53, 34.53], [-81.0, 34.75], [-80.75, 34.65], [-80.5, 34.75], [-80.25, 34.65], [-80.18, 34.68], [-80.03, 35.03], [-79.5, 35.25], [-79.25, 35.15], [-79.0, 35.25], [-78.75, 35.15], [-78.5, 35.25], [-77.97, 35.03], [-77.75, 34.5], [-77.97, 33.97], [-78.32, 33.82], [-78.47, 33.47], [-78.82, 33.32], [-78.85, 33.25], [-78.82, 33.18], [-78.47, 33.03], [-78.25, 32.5], [-78.47, 31.97], [-79.0, 31.75], [-79.25, 31.85], [-79.5, 31.75], [-79.75, 31.85], [-80.0, 31.75], [-80.25, 31.85], [-80.5, 31.75], [-80.75, 31.85], [-81.0, 31.75], [-81.25, 31.85], [-81.5, 31.75], [-81.75, 31.85], [-82.0, 31.75], [-82.53, 31.97], [-82.75, 32.5], [-82.65, 32.75], [-82.75, 33.0], [-82.53, 33.53]]]]}, "2021-05-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.53, 33.53], [-82.0, 33.75], [-81.75, 33.65], [-81.68, 33.68], [-81.65, 33.75], [-81.75, 34.0], [-81.53, 34.53], [-81.0, 34.75], [-80.75, 34.65], [-80.5, 34.75], [-80.25, 34.65], [-80.18, 34.68], [-80.03, 35.03], [-79.5, 35.25], [-79.25, 35.15], [-79.0, 35.25], [-78.75, 35.15], [-78.5, 35.25], [-77.97, 35.03], [-77.75, 34.5], [-77.97, 33.97], [-78.32, 33.82], [-78.47, 33.47], [-78.82, 33.32], [-78.85, 33.25], [-78.82, 33.18], [-78.47, 33.03], [-78.25, 32.5], [-78.47, 31.97], [-79.0, 31.75], [-79.25, 31.85], [-79.5, 31.75], [-79.75, 31.85], [-80.0, 31.75], [-80.25, 31.85], [-80.5, 31.75], [-80.75, 31.85], [-81.0, 31.75], [-81.25, 31.85], [-81.5, 31.75], [-81.75, 31.85], [-82.0, 31.75], [-82.53, 31.97], [-82.75, 32.5], [-82.65, 32.75], [-82.75, 33.0], [-82.53, 33.53]]]]}, "2021-06-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-82.53, 33.53], [-82.0, 33.75], [-81.75, 33.65], [-81.68, 33.68], [-81.65, 33.75], [-81.75, 34.0], [-81.53, 34.53], [-81.0, 34.75], [-80.75, 34.65], [-80.5, 34.75], [-80.25, 34.65], [-80.18, 34.68], [-80.03, 35.03], [-79.5, 35.25], [-79.25, 35.15], [-79.0, 35.25], [-78.75, 35.15], [-78.5, 35.25], [-77.97, 35.03], [-77.75, 34.5], [-77.97, 33.97], [-78.32, 33.82], [-78.47, 33.47], [-78.82, 33.32], [-78.85, 33.25], [-78.82, 33.18], [-78.47, 33.03], [-78.25, 32.5], [-78.47, 31.97], [-79.0, 31.75], [-79.25, 31.85], [-79.5, 31.75], [-79.75, 31.85], [-80.0, 31.75], [-80.25, 31.85], [-80.5, 31.75], [-80.75, 31.85], [-81.0, 31.75], [-81.25, 31.85], [-81.5, 31.75], [-81.75, 31.85], [-82.0, 31.75], [-82.53, 31.97], [-82.75, 32.5], [-82.65, 32.75], [-82.75, 33.0], [-82.53, 33.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.9268058485305914}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.292930422858003}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.207055131166783, 19.25067916899917, 20.878907490941742]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.65532475480336, 17.121628451347704, 19.78724256988005]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.1126881512125575, -5.155909128487606, -3.6101939888738457]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.9268058485305914, -6.5631113846608855, -4.785027878694848]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.776226650262748, -2.3315821787359217, -1.576531697470776]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.6074241008801766, -3.041659513440442, -2.1159022437211465]}}