{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-03-19 18:18:43.237342", "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": "2020-Oct-16_to_2020-Oct-19_115.0_26.0"}, "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": 2020100000528}, "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": "October 16 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 19 2020"}, "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": 80153.66266894646}, "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": 26.0}, "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": 115.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 117.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "Polygon", "coordinates": [[[113.854, 25.75], [113.823, 25.823], [113.47, 25.97], [113.25, 26.5], [113.47, 27.03], [113.823, 27.177], [113.97, 27.53], 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{"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-10-16T11:30:00.000000000": {"type": "Polygon", "coordinates": [[[114.85355339059328, 27.75], [114.75, 28.0], [114.85355339059328, 28.25], [114.75, 28.5], [114.96966991411009, 29.03033008588991], [115.5, 29.25], [115.75, 29.146446609406727], [115.82322330470336, 29.17677669529664], [115.96966991411009, 29.53033008588991], [116.5, 29.75], [116.75, 29.646446609406727], [117.0, 29.75], [117.53033008588991, 29.53033008588991], [117.75, 29.0], [117.53033008588991, 28.46966991411009], [117.17677669529664, 28.32322330470336], [117.03033008588991, 27.96966991411009], [116.67677669529664, 27.82322330470336], [116.53033008588991, 27.46966991411009], [116.17677669529664, 27.32322330470336], [116.03033008588991, 26.96966991411009], [115.5, 26.75], [114.96966991411009, 26.96966991411009], [114.75, 27.5], [114.85355339059328, 27.75]]]}, "2020-10-17T11:30:00.000000000": 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t2m anomaly over entire duration", "value": -3.5616182052122127}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.107603032748386, 16.267195245837513, 16.567260057919725, 16.71159695950263]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.881209214760815, 12.287197763549159, 12.822041901891225, 13.35739033831618]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.081683300114996, -3.886961815972015, -3.5362671158250985, -3.330175163353631]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.419447617192702, -4.502146082454146, -4.202472354123415, -3.6704249621507756]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The 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