{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:35.238057", "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": "2021-Nov-28_to_2021-Dec-03_93.5_38.0"}, "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": 2021110000935}, "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": "November 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 03 2021"}, "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": 105556.82586865874}, "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": 38.0}, "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": 93.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "93.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 91.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 97.5}, "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": 38.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[97.0, 35.75], [96.75, 35.85], [96.5, 35.75], [96.25, 35.85], [96.0, 35.75], [95.75, 35.85], [95.5, 35.75], [95.25, 35.85], 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["E.C.Asia", "Tibetan-Plateau"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[90.25, 38.5], [90.47, 39.03], [91.0, 39.25], [91.25, 39.15], [91.5, 39.25], [91.75, 39.15], [92.0, 39.25], [92.25, 39.15], [92.5, 39.25], [92.75, 39.15], [93.0, 39.25], [93.25, 39.15], [93.5, 39.25], [93.75, 39.15], [94.0, 39.25], [94.53, 39.03], [94.68, 38.68], [95.03, 38.53], [95.18, 38.18], [95.25, 38.15], [95.5, 38.25], [96.03, 38.03], [96.18, 37.68], [96.53, 37.53], [96.75, 37.0], [96.65, 36.75], [96.75, 36.5], [96.53, 35.97], [96.0, 35.75], [95.75, 35.85], [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], [93.75, 35.85], [93.5, 35.75], [92.97, 35.97], [92.82, 36.32], [92.75, 36.35], [92.5, 36.25], [91.97, 36.47], [91.82, 36.82], [91.47, 36.97], [91.32, 37.32], [91.25, 37.35], [91.0, 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