{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:55.958008", "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-Jan-24_to_2021-Jan-27_235.5_42.5"}, "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": 2021010000937}, "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": "January 24 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 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": 55734.06218645484}, "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": ["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": 42.5}, "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": 235.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "235.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 234.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 236.75}, "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": 47.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.5, 43.25], [-123.97, 43.03], [-123.75, 42.5], [-123.97, 41.97], [-124.5, 41.75], [-125.03, 41.97], [-125.25, 42.5], [-125.03, 43.03], [-124.5, 43.25]]]]}, "2021-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.75, 47.0], [-125.53, 47.53], [-125.0, 47.75], [-124.47, 47.53], [-124.32, 47.18], [-123.97, 47.03], [-123.82, 46.68], [-123.47, 46.53], [-123.25, 46.0], [-123.35, 45.75], [-123.25, 45.5], [-123.35, 45.25], [-123.25, 45.0], [-123.35, 44.75], [-123.25, 44.5], [-123.35, 44.25], [-123.25, 44.0], [-123.35, 43.75], [-123.32, 43.68], [-122.97, 43.53], [-122.75, 43.0], [-122.85, 42.75], [-122.75, 42.5], [-122.85, 42.25], [-122.75, 42.0], [-122.97, 41.47], [-123.5, 41.25], [-123.75, 41.35], [-123.82, 41.32], [-123.85, 41.25], [-123.75, 41.0], [-123.97, 40.47], [-124.5, 40.25], [-125.03, 40.47], [-125.25, 41.0], [-125.15, 41.25], [-125.25, 41.5], [-125.15, 41.75], [-125.25, 42.0], [-125.15, 42.25], [-125.25, 42.5], [-125.15, 42.75], [-125.25, 43.0], [-125.15, 43.25], [-125.25, 43.5], [-125.15, 43.75], [-125.25, 44.0], [-125.15, 44.25], [-125.25, 44.5], [-125.15, 44.75], [-125.25, 45.0], [-125.15, 45.25], [-125.25, 45.5], [-125.15, 45.75], [-125.25, 46.0], [-125.15, 46.25], [-125.18, 46.32], [-125.53, 46.47], [-125.75, 47.0]]]]}, "2021-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.75, 47.0], [-125.53, 47.53], [-125.0, 47.75], [-124.47, 47.53], [-124.32, 47.18], [-123.97, 47.03], [-123.82, 46.68], [-123.47, 46.53], [-123.25, 46.0], [-123.35, 45.75], [-123.25, 45.5], [-123.35, 45.25], [-123.25, 45.0], [-123.35, 44.75], [-123.25, 44.5], [-123.35, 44.25], [-123.25, 44.0], [-123.35, 43.75], [-123.32, 43.68], [-122.97, 43.53], [-122.75, 43.0], [-122.85, 42.75], [-122.75, 42.5], [-122.85, 42.25], [-122.75, 42.0], [-122.97, 41.47], [-123.5, 41.25], [-123.75, 41.35], [-123.82, 41.32], [-123.85, 41.25], [-123.75, 41.0], [-123.97, 40.47], [-124.5, 40.25], [-125.03, 40.47], [-125.25, 41.0], [-125.15, 41.25], [-125.25, 41.5], [-125.15, 41.75], [-125.25, 42.0], [-125.15, 42.25], [-125.25, 42.5], [-125.15, 42.75], [-125.25, 43.0], [-125.15, 43.25], [-125.25, 43.5], [-125.15, 43.75], [-125.25, 44.0], [-125.15, 44.25], [-125.25, 44.5], [-125.15, 44.75], [-125.25, 45.0], [-125.15, 45.25], [-125.25, 45.5], [-125.15, 45.75], [-125.25, 46.0], [-125.15, 46.25], [-125.18, 46.32], [-125.53, 46.47], [-125.75, 47.0]]]]}, "2021-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.75, 47.0], [-125.53, 47.53], [-125.0, 47.75], [-124.47, 47.53], [-124.32, 47.18], [-123.97, 47.03], [-123.82, 46.68], [-123.47, 46.53], [-123.25, 46.0], [-123.35, 45.75], [-123.25, 45.5], [-123.35, 45.25], [-123.25, 45.0], [-123.35, 44.75], [-123.25, 44.5], [-123.35, 44.25], [-123.25, 44.0], [-123.35, 43.75], [-123.32, 43.68], [-122.97, 43.53], [-122.75, 43.0], [-122.85, 42.75], [-122.75, 42.5], [-122.85, 42.25], [-122.75, 42.0], [-122.97, 41.47], [-123.5, 41.25], [-123.75, 41.35], [-123.82, 41.32], [-123.85, 41.25], [-123.75, 41.0], [-123.97, 40.47], [-124.5, 40.25], 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[-1.4822138461937087, -2.597617185769493, -2.3629514256249964, -1.7133660326504283]}}