{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:53.797340", "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-Aug-11_to_2025-Aug-13_113.0_48.5"}, "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": 2025080000438}, "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 11 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 13 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": 129541.37669726314}, "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", "Mongolia", "Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "Asia", "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": 48.5}, "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": 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": 109.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[108.47, 49.53], [108.88, 49.7], [108.75, 50.0], [108.97, 50.53], [109.5, 50.75], [109.75, 50.65], [109.82, 50.68], [109.97, 51.03], [110.5, 51.25], [111.03, 51.03], [111.18, 50.68], [111.25, 50.65], [111.5, 50.75], [112.03, 50.53], [112.18, 50.18], [112.53, 50.03], [112.68, 49.68], [112.75, 49.65], [113.0, 49.75], [113.25, 49.65], [113.5, 49.75], [113.75, 49.65], [114.0, 49.75], [114.53, 49.53], [114.68, 49.18], [115.03, 49.03], [115.18, 48.68], [115.25, 48.65], [115.5, 48.75], [116.03, 48.53], [116.25, 48.0], [116.03, 47.47], [115.5, 47.25], [115.25, 47.35], [115.18, 47.32], [115.03, 46.97], [114.68, 46.82], [114.53, 46.47], [114.18, 46.32], [114.03, 45.97], [113.5, 45.75], [113.25, 45.85], [113.0, 45.75], [112.75, 45.85], [112.5, 45.75], [112.25, 45.85], [112.0, 45.75], [111.75, 45.85], [111.5, 45.75], [110.97, 45.97], [110.75, 46.5], [110.85, 46.75], [110.82, 46.82], [110.47, 46.97], [110.32, 47.32], [110.25, 47.35], [110.0, 47.25], [109.47, 47.47], [109.32, 47.82], [108.97, 47.97], [108.82, 48.32], [108.47, 48.47], [108.25, 49.0], [108.47, 49.53]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.47, 48.47], [108.25, 49.0], [108.47, 49.53], [108.88, 49.7], [108.75, 50.0], [108.97, 50.53], [109.5, 50.75], [109.75, 50.65], [109.82, 50.68], [109.97, 51.03], [110.5, 51.25], [111.03, 51.03], [111.18, 50.68], [111.25, 50.65], [111.5, 50.75], [112.03, 50.53], [112.18, 50.18], [112.53, 50.03], [112.68, 49.68], [112.75, 49.65], [113.0, 49.75], [113.25, 49.65], [113.5, 49.75], [113.75, 49.65], [114.0, 49.75], [114.53, 49.53], [114.68, 49.18], [115.03, 49.03], [115.18, 48.68], [115.25, 48.65], [115.5, 48.75], [116.03, 48.53], [116.25, 48.0], [116.03, 47.47], [115.5, 47.25], [115.25, 47.35], [115.18, 47.32], [115.03, 46.97], [114.68, 46.82], [114.53, 46.47], [114.18, 46.32], [114.03, 45.97], [113.5, 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"description": "The daily evolution of mean t2m.", "value": [12.277155933682934, 12.040849082179818, 12.552552512840009]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.078824615478538, 7.1635846455891965, 7.843423461914085]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.024148275671323, -5.068843387727378, -4.438570258377798]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.286790345749637, -6.904828956217784, -5.080227464542077]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.547449637514092, -1.5779033209588362, -1.3872700455232045]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8114088927180725, -2.2382913381033855, -1.5856929325172335]}}