{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:30.272020", "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": "2025-May-29_to_2025-May-31_112.5_56.0"}, "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": 2025050000631}, "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": "May 29 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 31 2025"}, "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": 51848.93960659813}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "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": 56.0}, "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": 112.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "112.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 110.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 53.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 57.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 55.0], [109.97, 55.53], [110.5, 55.75], [110.8, 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55.0], [109.97, 55.53], [110.5, 55.75], [110.8, 55.63], [110.97, 56.03], [111.5, 56.25], [111.75, 56.15], [111.82, 56.18], [111.97, 56.53], [112.5, 56.75], [112.75, 56.65], [113.0, 56.75], [113.25, 56.65], [113.32, 56.68], [113.35, 56.75], [113.25, 57.0], [113.47, 57.53], [113.82, 57.68], [113.97, 58.03], [114.5, 58.25], [114.75, 58.15], [115.0, 58.25], [115.25, 58.15], [115.5, 58.25], [116.03, 58.03], [116.25, 57.5], [116.15, 57.25], [116.25, 57.0], [116.15, 56.75], [116.25, 56.5], [116.15, 56.25], [116.25, 56.0], [116.03, 55.47], [115.5, 55.25], [115.25, 55.35], [115.18, 55.32], [115.03, 54.97], [114.5, 54.75], [114.25, 54.85], [114.0, 54.75], [113.75, 54.85], [113.5, 54.75], [113.25, 54.85], [113.0, 54.75], [112.75, 54.85], [112.68, 54.82], [112.53, 54.47], [112.18, 54.32], [112.03, 53.97], [111.68, 53.82], [111.53, 53.47], [111.0, 53.25], [110.47, 53.47], [110.25, 54.0], [110.35, 54.25], [110.32, 54.32], [109.97, 54.47], [109.75, 55.0]]]]}, "2025-05-31T11:30:00.000000000": {"type": 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55.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.420965549555945}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.918971948319379}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.33909878200955745, 0.03700714111329262, 0.7870724995931937]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.7431650797526004, -2.488676452636696, -1.359306081136026]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.184277076233784, -7.051312313709127, -6.521326455015232]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": 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