{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:09.256438", "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-Dec-14_to_2021-Dec-18_71.5_39.5"}, "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": 2021120000545}, "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": "December 14 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 18 2021"}, "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": 63484.469577047705}, "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": ["Afghanistan", "Pakistan", "Tajikistan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia", "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": 39.5}, "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": 71.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "71.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 70.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 74.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[71.35, 36.75], [71.32, 36.82], [70.97, 36.97], [70.82, 37.32], [70.47, 37.47], [70.32, 37.82], [69.97, 37.97], [69.75, 38.5], 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[70.25, 40.15], [70.5, 40.25], [71.0, 40.04], [71.5, 40.25], [72.03, 40.03], [72.18, 39.68], [72.53, 39.53], [72.75, 39.0], [72.53, 38.47], [72.0, 38.25], [71.47, 38.47], [71.32, 38.82], [71.0, 38.96], [70.5, 38.75], [70.25, 38.85], [70.0, 38.75]]]]}, "2021-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[72.0, 35.75], [71.47, 35.97], [71.25, 36.5], [71.47, 37.03], [72.0, 37.25], [72.53, 37.03], [72.75, 36.5], [72.53, 35.97], [72.0, 35.75]]], [[[69.47, 38.97], [69.25, 39.5], [69.47, 40.03], [70.0, 40.25], [70.25, 40.15], [70.5, 40.25], [71.0, 40.04], [71.5, 40.25], [72.03, 40.03], [72.18, 39.68], [72.25, 39.65], [72.5, 39.75], [73.03, 39.53], [73.25, 39.0], [73.07, 38.57], [73.5, 38.75], [74.03, 38.53], [74.25, 38.0], [74.03, 37.47], [73.5, 37.25], [72.97, 37.47], [72.75, 38.0], [72.93, 38.43], [72.5, 38.25], [72.25, 38.35], [72.0, 38.25], [71.47, 38.47], [71.32, 38.82], [71.0, 38.96], [70.5, 38.75], [70.25, 38.85], [70.0, 38.75], [69.47, 38.97]]]]}, 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35.85], [73.68, 35.82], [73.53, 35.47], [73.18, 35.32], [73.03, 34.97], [72.5, 34.75], [71.97, 34.97], [71.75, 35.5], [71.96, 36.0], [71.82, 36.32], [71.47, 36.47], [71.32, 36.82], [70.97, 36.97], [70.82, 37.32], [70.47, 37.47], [70.32, 37.82], [69.97, 37.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.988586021441819}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.456237976888533}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.662305385055618, -24.843278380935374, -24.6255685413677, -25.57850855347513, -24.09786235488619]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-25.415253176558707, -28.959970023877617, -29.33392203057508, -30.08020661990659, -28.83763603106945]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.506491035040682, -6.2424615446775205, -6.372176243729685, -7.031285452737271, -6.123600526079531]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.860116579350404, -7.87264052221397, -7.932535537904954, -9.988586021441819, -9.328260857839695]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5065968402448178, -1.765608695944989, -1.575155059734409, -1.7510755991482574, -1.5309332699594953]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6197704009864184, -2.396119720610199, -1.9187026990874905, -2.1892873170201828, 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