{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:59:10.015050", "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": "2024-Jun-04_to_2024-Jun-09_77.5_37.5"}, "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": 2024060000193}, "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": "June 04 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 09 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 140466.4253828623}, "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": 37.5}, "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": 77.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "77.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 75.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 80.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[81.03, 37.53], [81.25, 37.0], [81.15, 36.75], [81.25, 36.5], [81.03, 35.97], [80.5, 35.75], [80.25, 35.85], [80.0, 35.75], 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{"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[78.47, 41.53], [79.0, 41.75], [79.53, 41.53], [79.68, 41.18], [80.03, 41.03], [80.25, 40.5], [80.03, 39.97], [79.5, 39.75], [79.25, 39.85], [79.0, 39.75], [78.75, 39.85], [78.5, 39.75], [77.97, 39.97], [77.75, 40.5], [77.97, 41.03], [78.32, 41.18], [78.47, 41.53]]]]}, "2024-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[80.0, 39.75], [80.53, 39.53], [80.75, 39.0], [80.53, 38.47], [80.0, 38.25], [79.75, 38.35], [79.5, 38.25], [78.97, 38.47], [78.75, 39.0], [78.97, 39.53], [79.5, 39.75], [79.75, 39.65], [80.0, 39.75]]], [[[78.32, 41.18], [78.47, 41.53], [79.0, 41.75], [79.53, 41.53], [79.68, 41.18], [80.03, 41.03], [80.25, 40.5], [80.03, 39.97], [79.5, 39.75], [79.25, 39.85], [79.0, 39.75], [78.75, 39.85], [78.68, 39.82], [78.53, 39.47], [78.0, 39.25], [77.47, 39.47], 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