{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:47.755533", "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-Dec-24_to_2016-Dec-27_237.5_40.0"}, "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": 2016120000684}, "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": "December 24 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 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": 109452.81544549024}, "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": ["N.Pacific-Ocean", "W.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 Pacific 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": 40.0}, "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": 237.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 235.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 239.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 38.0], [-125.03, 38.53], [-124.68, 38.68], [-124.65, 38.75], [-124.75, 39.0], [-124.54, 39.5], [-124.68, 39.82], [-125.03, 39.97], [-125.25, 40.5], [-125.03, 41.03], [-124.68, 41.18], [-124.65, 41.25], [-124.75, 41.5], [-124.65, 41.75], [-124.75, 42.0], [-124.65, 42.25], [-124.68, 42.32], [-125.03, 42.47], [-125.25, 43.0], [-125.03, 43.53], [-124.5, 43.75], [-124.25, 43.65], [-124.0, 43.75], [-123.47, 43.53], [-123.32, 43.18], [-122.97, 43.03], [-122.75, 42.5], [-122.85, 42.25], [-122.75, 42.0], [-122.87, 41.7], [-122.47, 41.53], [-122.25, 41.0], [-122.35, 40.75], [-122.32, 40.68], [-121.97, 40.53], [-121.75, 40.0], [-121.85, 39.75], [-121.82, 39.68], [-121.47, 39.53], [-121.25, 39.0], [-121.35, 38.75], [-121.25, 38.5], [-121.47, 37.97], [-122.0, 37.75], [-121.47, 37.53], [-121.25, 37.0], [-121.47, 36.47], [-122.0, 36.25], [-122.53, 36.47], [-122.7, 36.88], [-123.0, 36.75], [-123.25, 36.85], [-123.5, 36.75], [-123.75, 36.85], [-124.0, 36.75], [-124.53, 36.97], [-124.68, 37.32], [-125.03, 37.47], [-125.25, 38.0]], [[-122.3, 37.88], [-122.35, 37.75], [-122.3, 37.63], [-122.0, 37.75], [-122.3, 37.88]]]]}, "2016-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 38.0], [-125.03, 38.53], [-124.68, 38.68], [-124.65, 38.75], [-124.75, 39.0], [-124.54, 39.5], [-124.68, 39.82], [-125.03, 39.97], [-125.25, 40.5], [-125.03, 41.03], [-124.68, 41.18], [-124.65, 41.25], [-124.75, 41.5], [-124.65, 41.75], [-124.75, 42.0], [-124.65, 42.25], [-124.68, 42.32], [-125.03, 42.47], [-125.25, 43.0], [-125.03, 43.53], [-124.5, 43.75], [-124.25, 43.65], [-124.0, 43.75], [-123.47, 43.53], [-123.32, 43.18], [-122.97, 43.03], [-122.75, 42.5], [-122.85, 42.25], [-122.75, 42.0], [-122.87, 41.7], [-122.47, 41.53], [-122.32, 41.18], [-121.97, 41.03], [-121.82, 40.68], [-121.5, 40.54], [-121.0, 40.75], [-120.47, 40.53], [-120.25, 40.0], [-120.47, 39.47], [-120.82, 39.32], [-120.85, 39.25], [-120.75, 39.0], [-120.85, 38.75], [-120.75, 38.5], [-120.97, 37.97], [-121.37, 37.8], [-121.25, 37.5], [-121.35, 37.25], [-121.25, 37.0], [-121.47, 36.47], [-122.0, 36.25], [-122.53, 36.47], [-122.68, 36.82], [-122.75, 36.85], [-123.0, 36.75], [-123.25, 36.85], [-123.5, 36.75], [-123.75, 36.85], [-124.0, 36.75], [-124.53, 36.97], [-124.68, 37.32], [-125.03, 37.47], [-125.25, 38.0]]]]}, "2016-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 38.0], [-125.03, 38.53], [-124.68, 38.68], [-124.65, 38.75], [-124.75, 39.0], [-124.54, 39.5], [-124.68, 39.82], [-125.03, 39.97], [-125.25, 40.5], [-125.03, 41.03], [-124.68, 41.18], [-124.65, 41.25], [-124.75, 41.5], [-124.65, 41.75], [-124.75, 42.0], [-124.65, 42.25], [-124.68, 42.32], [-125.03, 42.47], [-125.25, 43.0], [-125.03, 43.53], [-124.5, 43.75], [-124.25, 43.65], [-124.0, 43.75], [-123.47, 43.53], [-123.32, 43.18], [-122.97, 43.03], [-122.75, 42.5], [-122.85, 42.25], [-122.75, 42.0], [-122.87, 41.7], [-122.47, 41.53], [-122.32, 41.18], [-121.97, 41.03], [-121.82, 40.68], [-121.5, 40.54], [-121.0, 40.75], [-120.47, 40.53], 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[-2.9806797565301206, -4.021945091172958, -3.8024751485630635, -3.4367326318602656]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.968050720292808, -9.8096990661615, -9.232606467324956, -4.856402582179214]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5600201554713735, -1.9203596026546566, -1.8682393512654898, -1.4693982203272762]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.263418072908422, -3.779262217328158, -2.6082056424381137, -1.6071239249238858]}}