{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:27.420958", "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": "2022-Apr-21_to_2022-Apr-23_70.0_59.5"}, "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": 2022040000717}, "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": "April 21 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 94068.41831170447}, "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": ["Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 59.5}, "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": 70.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "70.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 66.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 70.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 57.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[65.82, 60.68], [65.97, 61.03], [66.5, 61.25], [66.75, 61.15], [66.82, 61.18], [66.97, 61.53], [67.32, 61.68], [67.47, 62.03], 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time step", "value": {"2022-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[65.25, 60.0], [65.47, 60.53], [65.82, 60.68], [65.97, 61.03], [66.5, 61.25], [66.75, 61.15], [66.82, 61.18], [66.97, 61.53], [67.32, 61.68], [67.47, 62.03], [68.0, 62.25], [68.25, 62.15], [68.5, 62.25], [68.75, 62.15], [69.0, 62.25], [69.53, 62.03], [69.75, 61.5], [69.65, 61.25], [69.68, 61.18], [69.75, 61.15], [70.0, 61.25], [70.25, 61.15], [70.5, 61.25], [71.03, 61.03], [71.25, 60.5], [71.15, 60.25], [71.25, 60.0], [71.15, 59.75], [71.25, 59.5], [71.15, 59.25], [71.25, 59.0], [71.03, 58.47], [70.68, 58.32], [70.53, 57.97], [70.0, 57.75], [69.75, 57.85], [69.5, 57.75], [69.25, 57.85], [69.18, 57.82], [69.03, 57.47], [68.68, 57.32], [68.53, 56.97], [68.0, 56.75], [67.75, 56.85], [67.5, 56.75], [67.25, 56.85], [67.0, 56.75], [66.47, 56.97], [66.32, 57.32], [65.97, 57.47], [65.75, 58.0], [65.96, 58.5], [65.82, 58.82], [65.47, 58.97], [65.25, 59.5], [65.35, 59.75], [65.25, 60.0]]]]}, 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"Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.123923535534175}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.554203528428124}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.755567270413337, -6.389402516503765, -4.532248643217088]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.1161358398429115, -9.420329135731038, -7.655681635281383]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.018257888409343, -10.795994275585347, -8.848358421289666]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.320149303030234, -13.123923535534175, -10.954773569673534]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5812595518256005, -1.9528994449831483, -1.6393715812297225]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8324862845589558, -2.3470001406656666, -2.013941713792985]}}