{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:14.453112", "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": "2022-Dec-22_to_2022-Dec-26_127.5_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": 2022120001034}, "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 22 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 26 2022"}, "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": 129123.27515157359}, "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": ["Korea, Democratic People's Republic of", "Korea, Republic of"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": ["Sea of Japan", "Yellow 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": 127.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 129.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[126.0, 39.75], [126.25, 39.65], [126.5, 39.75], [127.03, 39.53], [127.18, 39.18], [127.25, 39.15], [127.5, 39.25], 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vertices describing the boundary of the event at each time step", "value": {"2022-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, 38.5], [124.97, 39.03], [125.32, 39.18], [125.47, 39.53], [126.0, 39.75], [126.25, 39.65], [126.5, 39.75], [127.03, 39.53], [127.18, 39.18], [127.25, 39.15], [127.5, 39.25], [128.03, 39.03], [128.25, 38.5], [128.15, 38.25], [128.18, 38.18], [128.53, 38.03], [128.68, 37.68], [129.03, 37.53], [129.18, 37.18], [129.53, 37.03], [129.75, 36.5], [129.65, 36.25], [129.75, 36.0], [129.65, 35.75], [129.75, 35.5], [129.53, 34.97], [129.18, 34.82], [129.03, 34.47], [128.63, 34.3], [128.75, 34.0], [128.53, 33.47], [128.0, 33.25], [127.75, 33.35], [127.5, 33.25], [127.25, 33.35], [127.0, 33.25], [126.47, 33.47], [126.32, 33.82], [125.97, 33.97], [125.75, 34.5], [125.85, 34.75], [125.75, 35.0], [125.85, 35.25], [125.75, 35.5], [125.85, 35.75], [125.82, 35.82], [125.47, 35.97], [125.25, 36.5], [125.35, 36.75], [125.25, 37.0], [125.35, 37.25], [125.32, 37.32], [124.97, 37.47], [124.75, 38.0], [124.85, 38.25], [124.75, 38.5]]]]}, "2022-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, 38.5], [124.97, 39.03], [125.32, 39.18], [125.47, 39.53], [126.0, 39.75], [126.25, 39.65], [126.5, 39.75], [127.03, 39.53], [127.18, 39.18], [127.25, 39.15], [127.5, 39.25], [128.03, 39.03], [128.25, 38.5], [128.15, 38.25], [128.18, 38.18], [128.53, 38.03], [128.68, 37.68], [129.03, 37.53], [129.18, 37.18], [129.53, 37.03], [129.75, 36.5], [129.65, 36.25], [129.75, 36.0], [129.65, 35.75], [129.75, 35.5], [129.53, 34.97], [129.18, 34.82], [129.03, 34.47], [128.63, 34.3], [128.75, 34.0], [128.53, 33.47], [128.0, 33.25], [127.75, 33.35], [127.5, 33.25], [127.25, 33.35], [127.0, 33.25], [126.47, 33.47], [126.32, 33.82], [125.97, 33.97], [125.75, 34.5], [125.85, 34.75], [125.75, 35.0], [125.85, 35.25], [125.75, 35.5], [125.85, 35.75], [125.82, 35.82], [125.47, 35.97], [125.25, 36.5], [125.35, 36.75], [125.25, 37.0], 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