{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:10.795095", "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": "2011-Apr-16_to_2011-Apr-20_131.0_37.0"}, "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": 2011040000868}, "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": "April 16 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 20 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 83668.93886646279}, "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": ["Japan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": ["Japan Sea", "Seto Naikai or Inland Sea"]}, "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": 37.0}, "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": 131.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "131.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 129.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 134.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.0, 37.75], [131.53, 37.53], [131.75, 37.0], [131.53, 36.47], [131.0, 36.25], [130.47, 36.47], [130.25, 37.0], [130.47, 37.53], [131.0, 37.75]]]]}, "2011-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.0, 37.75], [131.53, 37.53], [131.75, 37.0], [131.53, 36.47], [131.0, 36.25], [130.47, 36.47], [130.25, 37.0], [130.47, 37.53], [131.0, 37.75]]]]}, "2011-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.47, 34.53], [129.82, 34.68], [129.97, 35.03], [130.32, 35.18], [130.35, 35.25], [130.25, 35.5], [130.35, 35.75], [130.25, 36.0], [130.46, 36.5], [130.25, 37.0], [130.47, 37.53], [131.0, 37.75], [131.25, 37.65], [131.5, 37.75], [132.03, 37.53], [132.18, 37.18], [132.53, 37.03], [132.75, 36.5], [132.65, 36.25], [132.75, 36.0], [132.65, 35.75], [132.68, 35.68], [132.75, 35.65], [133.0, 35.75], [133.25, 35.65], [133.5, 35.75], [133.75, 35.65], [134.0, 35.75], [134.53, 35.53], [134.75, 35.0], [134.54, 34.5], [134.75, 34.0], [134.65, 33.75], [134.75, 33.5], [134.53, 32.97], [134.0, 32.75], 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"anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.313813230732678, -1.4528450051069772, -2.3569281829344835, -2.739793320347807, -1.9713991009978333]}}