{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:05:20.994690", "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": "2016-May-04_to_2016-May-07_284.0_38.0"}, "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": 2016050000207}, "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 04 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 07 2016"}, "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": 73286.72838790496}, "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": 38.0}, "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": 284.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "284.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 283.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 289.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 42.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.0, 40.75], [-74.75, 40.65], [-74.68, 40.68], [-74.53, 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[-77.25, 39.0], [-77.03, 39.53], [-76.68, 39.68], [-76.53, 40.03], [-76.0, 40.25], [-75.75, 40.15], [-75.68, 40.18], [-75.53, 40.53], [-75.0, 40.75], [-74.75, 40.65], [-74.68, 40.68], [-74.53, 41.03], [-74.0, 41.25], [-73.75, 41.15], [-73.68, 41.18], [-73.53, 41.53], [-73.0, 41.75], [-72.75, 41.65], [-72.5, 41.75], [-72.25, 41.65], [-72.18, 41.68], [-72.03, 42.03], [-71.5, 42.25], [-71.2, 42.12], [-71.15, 42.25], [-71.25, 42.5], [-71.03, 43.03], [-70.5, 43.25], [-69.97, 43.03], [-69.75, 42.5], [-69.85, 42.25], [-69.75, 42.0], [-69.85, 41.75], [-69.75, 41.5], [-69.97, 40.97], [-70.32, 40.82], [-70.35, 40.75], [-70.25, 40.5], [-70.47, 39.97], [-71.0, 39.75], [-71.25, 39.85], [-71.5, 39.75], [-71.75, 39.85], [-72.0, 39.75], [-72.25, 39.85], [-72.5, 39.75], [-72.75, 39.85], [-73.0, 39.75], [-73.25, 39.85], [-73.32, 39.82], [-73.35, 39.75], [-73.25, 39.5], [-73.47, 38.97], [-74.0, 38.75], [-74.25, 38.85], [-74.5, 38.75], [-74.75, 38.85], [-74.87, 38.8], [-74.75, 38.5], [-74.97, 37.97], [-75.32, 37.82], [-75.47, 37.47], [-76.0, 37.25], [-76.25, 37.35], [-76.5, 37.25], [-77.03, 37.47], [-77.25, 38.0], [-77.15, 38.25], [-77.25, 38.5], [-77.15, 38.75]]]]}, "2016-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.15, 38.75], [-77.25, 39.0], [-77.03, 39.53], [-76.68, 39.68], [-76.53, 40.03], [-76.0, 40.25], [-75.75, 40.15], [-75.68, 40.18], [-75.53, 40.53], [-75.0, 40.75], [-74.75, 40.65], [-74.68, 40.68], [-74.53, 41.03], [-74.0, 41.25], [-73.75, 41.15], [-73.68, 41.18], [-73.53, 41.53], [-73.0, 41.75], [-72.75, 41.65], [-72.5, 41.75], [-72.25, 41.65], [-72.18, 41.68], [-72.03, 42.03], [-71.5, 42.25], [-71.2, 42.12], [-71.15, 42.25], [-71.25, 42.5], [-71.03, 43.03], [-70.5, 43.25], [-69.97, 43.03], [-69.75, 42.5], [-69.85, 42.25], [-69.75, 42.0], [-69.85, 41.75], [-69.75, 41.5], [-69.97, 40.97], [-70.32, 40.82], [-70.35, 40.75], [-70.25, 40.5], [-70.47, 39.97], [-71.0, 39.75], [-71.25, 39.85], [-71.5, 39.75], [-71.75, 39.85], [-72.0, 39.75], 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entire duration", "value": -6.112460057663384}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.459156985783}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.137159715412281, 9.57745058263555, 9.936757434515812, 12.277851391256831]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.297346488232677, 6.994475133596836, 7.49410580503087, 11.725898285619962]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.9055125546782614, -3.6684528597991046, -3.4145771979064974, -4.412609891418164]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.405699728461343, -5.728885173501794, -6.112460057663384, 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