{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:42.922068", "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": "2018-Dec-27_to_2018-Dec-30_129.0_36.0"}, "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": 2018120000882}, "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 27 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 30 2018"}, "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": 154980.90035813252}, "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": ["South Korea"]}, "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": ["Eastern China Sea", "Japan 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": 36.0}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 131.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.25}, "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": {"2018-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, 35.53], [126.5, 35.75], [126.75, 35.65], [126.88, 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"2018-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, 35.53], [126.5, 35.75], [126.75, 35.65], [126.88, 35.7], [126.75, 36.0], [126.85, 36.25], [126.75, 36.5], [126.85, 36.75], [126.75, 37.0], [126.97, 37.53], [127.5, 37.75], [127.75, 37.65], [128.0, 37.75], [128.5, 37.54], [129.0, 37.75], [129.25, 37.65], [129.5, 37.75], [130.03, 37.53], [130.25, 37.0], [130.15, 36.75], [130.18, 36.68], [130.53, 36.53], [130.68, 36.18], [131.03, 36.03], [131.18, 35.68], [131.53, 35.53], [131.75, 35.0], [131.53, 34.47], [131.18, 34.32], [131.03, 33.97], [130.68, 33.82], [130.53, 33.47], [130.18, 33.32], [130.03, 32.97], [129.68, 32.82], [129.53, 32.47], [129.18, 32.32], [129.15, 32.25], [129.25, 32.0], [129.03, 31.47], [128.68, 31.32], [128.53, 30.97], [128.0, 30.75], [127.75, 30.85], [127.5, 30.75], [126.97, 30.97], [126.75, 31.5], [126.97, 32.03], [127.32, 32.18], [127.35, 32.25], [127.25, 32.5], [127.35, 32.75], [127.32, 32.82], [126.97, 32.97], [126.82, 33.32], 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