{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:14.516054", "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": "2023-Sep-23_to_2023-Sep-27_97.0_36.5"}, "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": 2023090000446}, "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": "September 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 27 2023"}, "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": 64570.41074774513}, "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": ["China"]}, "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": []}, "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": 36.5}, "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": 97.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "97.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 94.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 99.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[93.47, 37.03], [94.0, 37.25], [94.25, 37.15], [94.5, 37.25], [94.75, 37.15], [95.0, 37.25], [95.25, 37.15], [95.5, 37.25], 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time step", "value": {"2023-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[94.0, 35.75], [93.47, 35.97], [93.25, 36.5], [93.47, 37.03], [94.0, 37.25], [94.25, 37.15], [94.5, 37.25], [94.75, 37.15], [95.0, 37.25], [95.25, 37.15], [95.5, 37.25], [96.0, 37.04], [96.32, 37.18], [96.47, 37.53], [97.0, 37.75], [97.25, 37.65], [97.5, 37.75], [97.75, 37.65], [98.0, 37.75], [98.25, 37.65], [98.5, 37.75], [99.03, 37.53], [99.25, 37.0], [99.15, 36.75], [99.25, 36.5], [99.03, 35.97], [98.5, 35.75], [98.25, 35.85], [98.18, 35.82], [98.03, 35.47], [97.5, 35.25], [96.97, 35.47], [96.82, 35.82], [96.75, 35.85], [96.5, 35.75], [96.0, 35.96], [95.5, 35.75], [95.25, 35.85], [95.0, 35.75], [94.75, 35.85], [94.5, 35.75], [94.25, 35.85], [94.0, 35.75]]]]}, "2023-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.47, 35.97], [93.25, 36.5], [93.47, 37.03], [94.0, 37.25], [94.25, 37.15], [94.5, 37.25], [94.75, 37.15], [95.0, 37.25], [95.25, 37.15], [95.5, 37.25], 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