{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:12:53.544863", "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-Aug-26_to_2021-Sep-01_113.0_35.0"}, "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": 2021080001142}, "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": "August 26 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 01 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 73673.70048830846}, "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": 35.0}, "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": 113.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "113.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 109.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.5}, "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": 35.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[114.5, 35.25], [115.03, 35.03], [115.25, 34.5], [115.15, 34.25], [115.25, 34.0], [115.03, 33.47], [114.5, 33.25], 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step", "value": {"2021-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 35.03], [113.5, 35.25], [113.75, 35.15], [114.0, 35.25], [114.25, 35.15], [114.5, 35.25], [115.03, 35.03], [115.25, 34.5], [115.15, 34.25], [115.25, 34.0], [115.03, 33.47], [114.5, 33.25], [114.25, 33.35], [114.0, 33.25], [113.75, 33.35], [113.5, 33.25], [113.25, 33.35], [113.0, 33.25], [112.47, 33.47], [112.25, 34.0], [112.47, 34.53], [112.82, 34.68], [112.97, 35.03]]]]}, "2021-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 35.03], [113.5, 35.25], [113.75, 35.15], [114.0, 35.25], [114.25, 35.15], [114.5, 35.25], [115.03, 35.03], [115.25, 34.5], [115.15, 34.25], [115.25, 34.0], [115.03, 33.47], [114.5, 33.25], [114.25, 33.35], [114.0, 33.25], [113.75, 33.35], [113.5, 33.25], [113.25, 33.35], [113.0, 33.25], [112.47, 33.47], [112.25, 34.0], [112.47, 34.53], [112.82, 34.68], [112.97, 35.03]]]]}, "2021-08-28T11:30:00.000000000": {"type": "MultiPolygon", 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -5.9154813503926675}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9568761663611642}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.578293205932198, 20.719185698610545, 19.936979490155352, 19.305079614683223, 19.056594398839366, 19.100758999064283, 18.888818076460893]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.243444962666217, 20.43664642184268, 17.89942725919991, 16.211574511495826, 15.965572653538175, 15.602289909803062, 16.899934792195666]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.462514927793052, -4.097102242061055, -3.7047105345466536, -3.9146862483077944, -4.063629624193132, -3.727208468121906, 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