{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:29.999351", "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-Dec-05_to_2025-Dec-08_133.5_73.0"}, "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": 2025120001477}, "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 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 08 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 97945.14140965429}, "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": ["Arctic Ocean", "East Siberian Sea", "Laptev Sea"]}, "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": 73.0}, "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": 133.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "133.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 127.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 145.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 72.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 77.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[128.18, 73.68], [128.25, 73.65], [128.32, 73.68], [128.47, 74.03], [129.0, 74.25], [129.25, 74.15], [129.5, 74.25], [129.75, 74.15], [130.0, 74.25], [130.25, 74.15], [130.5, 74.25], [130.75, 74.15], [131.0, 74.25], [131.25, 74.15], [131.38, 74.2], [131.25, 74.5], [131.47, 75.03], [132.0, 75.25], [132.25, 75.15], [132.5, 75.25], [132.75, 75.15], [132.82, 75.18], [132.97, 75.53], [133.5, 75.75], [134.03, 75.53], [134.18, 75.18], [134.25, 75.15], [134.5, 75.25], [134.75, 75.15], [135.0, 75.25], [135.53, 75.03], [135.68, 74.68], [135.75, 74.65], [135.82, 74.68], [135.96, 75.0], [135.82, 75.32], [135.47, 75.47], [135.25, 76.0], [135.47, 76.53], [136.0, 76.75], [136.25, 76.65], [136.5, 76.75], [136.75, 76.65], [136.82, 76.68], [136.97, 77.03], [137.5, 77.25], [137.75, 77.15], [138.0, 77.25], [138.25, 77.15], [138.5, 77.25], [138.75, 77.15], [138.82, 77.18], [138.97, 77.53], [139.5, 77.75], [139.75, 77.65], [140.0, 77.75], [140.25, 77.65], [140.5, 77.75], [140.75, 77.65], [141.0, 77.75], [141.25, 77.65], [141.32, 77.68], [141.47, 78.03], [142.0, 78.25], [142.25, 78.15], [142.5, 78.25], [142.75, 78.15], [143.0, 78.25], [143.25, 78.15], [143.5, 78.25], [143.75, 78.15], [144.0, 78.25], [144.53, 78.03], [144.68, 77.68], [144.75, 77.65], [145.0, 77.75], [145.25, 77.65], [145.5, 77.75], [146.03, 77.53], [146.25, 77.0], [146.03, 76.47], [145.5, 76.25], [145.25, 76.35], [145.0, 76.25], [144.75, 76.35], [144.5, 76.25], [144.25, 76.35], [144.0, 76.25], [143.75, 76.35], [143.5, 76.25], [143.25, 76.35], [143.0, 76.25], [142.75, 76.35], [142.5, 76.25], [142.25, 76.35], [142.0, 76.25], [142.53, 76.03], [142.75, 75.5], [142.53, 74.97], [142.18, 74.82], [142.03, 74.47], [141.5, 74.25], [141.25, 74.35], [141.0, 74.25], [140.75, 74.35], [140.68, 74.32], [140.53, 73.97], [140.0, 73.75], [139.75, 73.85], [139.5, 73.75], [139.25, 73.85], [139.18, 73.82], [139.03, 73.47], [138.5, 73.25], [138.25, 73.35], [138.0, 73.25], [137.75, 73.35], [137.5, 73.25], [137.25, 73.35], [137.18, 73.32], [137.03, 72.97], [136.68, 72.82], [136.53, 72.47], [136.0, 72.25], [135.75, 72.35], [135.5, 72.25], [135.25, 72.35], [135.0, 72.25], [134.75, 72.35], [134.68, 72.32], [134.53, 71.97], [134.0, 71.75], [133.75, 71.85], [133.5, 71.75], [133.25, 71.85], [133.0, 71.75], [132.75, 71.85], [132.5, 71.75], [132.25, 71.85], [132.0, 71.75], [131.47, 71.97], [131.25, 72.5], [131.35, 72.75], [131.32, 72.82], [131.25, 72.85], [131.0, 72.75], [130.75, 72.85], [130.5, 72.75], [130.25, 72.85], [130.0, 72.75], [129.75, 72.85], [129.68, 72.82], [129.53, 72.47], [129.0, 72.25], [128.75, 72.35], [128.5, 72.25], [128.25, 72.35], [128.0, 72.25], [127.75, 72.35], [127.5, 72.25], [127.25, 72.35], [127.0, 72.25], [126.47, 72.47], [126.25, 73.0], [126.47, 73.53], [126.82, 73.68], [126.97, 74.03], [127.5, 74.25], [128.03, 74.03], [128.18, 73.68]], [[141.75, 76.35], [141.5, 76.25], [141.75, 76.15], [142.0, 76.25], [141.75, 76.35]], [[141.25, 76.35], [141.18, 76.32], [141.13, 76.2], [141.25, 76.15], [141.5, 76.25], [141.25, 76.35]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic", "Arctic-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.97, 74.03], [127.5, 74.25], [128.03, 74.03], [128.18, 73.68], [128.25, 73.65], [128.5, 73.75], [128.75, 73.65], [129.0, 73.75], [129.53, 73.53], [129.75, 73.0], [129.53, 72.47], [129.0, 72.25], [128.75, 72.35], [128.5, 72.25], [128.25, 72.35], [128.0, 72.25], [127.75, 72.35], [127.5, 72.25], [127.25, 72.35], [127.0, 72.25], [126.47, 72.47], [126.25, 73.0], [126.47, 73.53], [126.82, 73.68], [126.97, 74.03]]]]}, "2025-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.97, 74.03], [127.5, 74.25], [128.03, 74.03], [128.18, 73.68], [128.25, 73.65], [128.32, 73.68], [128.47, 74.03], [129.0, 74.25], [129.25, 74.15], [129.5, 74.25], [129.75, 74.15], [130.0, 74.25], [130.25, 74.15], [130.5, 74.25], [130.75, 74.15], [131.0, 74.25], [131.25, 74.15], [131.38, 74.2], [131.25, 74.5], [131.47, 75.03], [132.0, 75.25], [132.25, 75.15], [132.5, 75.25], [132.75, 75.15], [132.82, 75.18], [132.97, 75.53], [133.5, 75.75], [134.03, 75.53], [134.18, 75.18], [134.25, 75.15], [134.5, 75.25], [134.75, 75.15], [135.0, 75.25], [135.53, 75.03], [135.68, 74.68], [135.75, 74.65], [135.82, 74.68], [135.96, 75.0], [135.82, 75.32], [135.47, 75.47], [135.25, 76.0], [135.47, 76.53], [136.0, 76.75], [136.25, 76.65], [136.5, 76.75], [136.75, 76.65], [136.82, 76.68], [136.97, 77.03], [137.5, 77.25], [137.75, 77.15], [138.0, 77.25], [138.25, 77.15], [138.5, 77.25], [138.75, 77.15], [138.82, 77.18], [138.97, 77.53], [139.5, 77.75], [139.75, 77.65], [140.0, 77.75], [140.25, 77.65], [140.5, 77.75], [140.75, 77.65], [141.0, 77.75], [141.25, 77.65], [141.32, 77.68], [141.47, 78.03], [142.0, 78.25], [142.25, 78.15], [142.5, 78.25], [142.75, 78.15], [143.0, 78.25], [143.25, 78.15], [143.5, 78.25], [143.75, 78.15], [144.0, 78.25], [144.53, 78.03], [144.68, 77.68], [144.75, 77.65], [145.0, 77.75], [145.25, 77.65], [145.5, 77.75], [146.03, 77.53], [146.25, 77.0], [146.03, 76.47], [145.5, 76.25], [145.25, 76.35], [145.0, 76.25], [144.75, 76.35], [144.5, 76.25], [144.25, 76.35], [144.0, 76.25], [143.75, 76.35], [143.5, 76.25], [143.25, 76.35], [143.0, 76.25], [142.75, 76.35], [142.5, 76.25], [142.25, 76.35], [142.0, 76.25], [142.53, 76.03], [142.75, 75.5], [142.53, 74.97], [142.18, 74.82], [142.03, 74.47], [141.5, 74.25], [141.25, 74.35], [141.0, 74.25], [140.75, 74.35], [140.68, 74.32], [140.53, 73.97], [140.0, 73.75], [139.75, 73.85], [139.5, 73.75], [139.25, 73.85], [139.18, 73.82], [139.03, 73.47], [138.5, 73.25], [138.25, 73.35], [138.0, 73.25], [137.75, 73.35], [137.5, 73.25], [137.25, 73.35], [137.18, 73.32], [137.03, 72.97], [136.68, 72.82], [136.53, 72.47], [136.0, 72.25], [135.75, 72.35], [135.5, 72.25], [135.25, 72.35], [135.0, 72.25], [134.75, 72.35], [134.68, 72.32], [134.53, 71.97], [134.0, 71.75], [133.75, 71.85], [133.5, 71.75], [133.25, 71.85], [133.0, 71.75], [132.75, 71.85], [132.5, 71.75], [132.25, 71.85], [132.0, 71.75], [131.47, 71.97], [131.25, 72.5], [131.35, 72.75], [131.32, 72.82], [131.25, 72.85], [131.0, 72.75], [130.75, 72.85], [130.5, 72.75], [130.25, 72.85], [130.0, 72.75], [129.75, 72.85], [129.68, 72.82], [129.53, 72.47], [129.0, 72.25], [128.75, 72.35], [128.5, 72.25], [128.25, 72.35], [128.0, 72.25], [127.75, 72.35], [127.5, 72.25], [127.25, 72.35], [127.0, 72.25], [126.47, 72.47], [126.25, 73.0], [126.47, 73.53], [126.82, 73.68], [126.97, 74.03]], [[141.75, 76.35], [141.5, 76.25], [141.75, 76.15], [142.0, 76.25], [141.75, 76.35]], [[141.25, 76.35], [141.18, 76.32], [141.13, 76.2], [141.25, 76.15], [141.5, 76.25], [141.25, 76.35]]]]}, "2025-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.97, 74.03], [127.5, 74.25], [128.03, 74.03], [128.18, 73.68], [128.25, 73.65], [128.32, 73.68], [128.47, 74.03], [129.0, 74.25], [129.25, 74.15], [129.5, 74.25], [129.75, 74.15], [130.0, 74.25], [130.25, 74.15], [130.5, 74.25], [130.75, 74.15], [131.0, 74.25], [131.25, 74.15], [131.38, 74.2], [131.25, 74.5], [131.47, 75.03], [132.0, 75.25], [132.25, 75.15], [132.5, 75.25], [132.75, 75.15], [132.82, 75.18], [132.97, 75.53], [133.5, 75.75], [134.03, 75.53], [134.18, 75.18], [134.25, 75.15], [134.5, 75.25], [134.75, 75.15], [135.0, 75.25], [135.53, 75.03], [135.68, 74.68], [135.75, 74.65], [135.82, 74.68], [135.96, 75.0], [135.82, 75.32], [135.47, 75.47], [135.25, 76.0], [135.47, 76.53], [136.0, 76.75], [136.25, 76.65], [136.5, 76.75], [136.75, 76.65], [136.82, 76.68], [136.97, 77.03], [137.5, 77.25], [137.75, 77.15], [138.0, 77.25], [138.25, 77.15], [138.5, 77.25], [138.75, 77.15], [138.82, 77.18], [138.97, 77.53], [139.5, 77.75], [139.75, 77.65], [140.0, 77.75], [140.25, 77.65], [140.5, 77.75], [140.75, 77.65], [141.0, 77.75], [141.25, 77.65], [141.32, 77.68], [141.47, 78.03], [142.0, 78.25], [142.25, 78.15], [142.5, 78.25], [142.75, 78.15], [143.0, 78.25], [143.25, 78.15], [143.5, 78.25], [143.75, 78.15], [144.0, 78.25], [144.53, 78.03], [144.68, 77.68], [144.75, 77.65], [145.0, 77.75], [145.25, 77.65], [145.5, 77.75], [146.03, 77.53], [146.25, 77.0], [146.03, 76.47], [145.5, 76.25], [145.25, 76.35], [145.0, 76.25], [144.75, 76.35], [144.5, 76.25], [144.25, 76.35], [144.0, 76.25], [143.75, 76.35], [143.5, 76.25], [143.25, 76.35], [143.0, 76.25], [142.75, 76.35], [142.5, 76.25], [142.25, 76.35], [142.0, 76.25], [142.53, 76.03], [142.75, 75.5], [142.53, 74.97], [142.18, 74.82], [142.03, 74.47], [141.5, 74.25], [141.25, 74.35], [141.0, 74.25], [140.75, 74.35], [140.68, 74.32], [140.53, 73.97], [140.0, 73.75], [139.75, 73.85], [139.5, 73.75], [139.25, 73.85], [139.18, 73.82], [139.03, 73.47], [138.5, 73.25], [138.25, 73.35], [138.0, 73.25], [137.75, 73.35], [137.5, 73.25], [137.25, 73.35], [137.18, 73.32], [137.03, 72.97], [136.68, 72.82], [136.53, 72.47], [136.0, 72.25], [135.75, 72.35], [135.5, 72.25], [135.25, 72.35], [135.0, 72.25], [134.75, 72.35], [134.68, 72.32], [134.53, 71.97], [134.0, 71.75], [133.75, 71.85], [133.5, 71.75], [133.25, 71.85], [133.0, 71.75], [132.75, 71.85], [132.5, 71.75], [132.25, 71.85], [132.0, 71.75], [131.47, 71.97], [131.25, 72.5], [131.35, 72.75], [131.32, 72.82], [131.25, 72.85], [131.0, 72.75], [130.75, 72.85], [130.5, 72.75], [130.25, 72.85], [130.0, 72.75], [129.75, 72.85], [129.68, 72.82], [129.53, 72.47], [129.0, 72.25], [128.75, 72.35], [128.5, 72.25], [128.25, 72.35], [128.0, 72.25], [127.75, 72.35], [127.5, 72.25], [127.25, 72.35], [127.0, 72.25], [126.47, 72.47], [126.25, 73.0], [126.47, 73.53], [126.82, 73.68], [126.97, 74.03]], [[141.75, 76.35], [141.5, 76.25], [141.75, 76.15], [142.0, 76.25], [141.75, 76.35]], [[141.25, 76.35], [141.18, 76.32], [141.13, 76.2], [141.25, 76.15], [141.5, 76.25], [141.25, 76.35]]]]}, "2025-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.0, 72.75], [128.47, 72.97], [128.25, 73.5], [128.47, 74.03], [129.0, 74.25], [129.25, 74.15], [129.5, 74.25], [129.75, 74.15], [130.0, 74.25], [130.25, 74.15], [130.5, 74.25], [130.75, 74.15], [131.0, 74.25], [131.25, 74.15], [131.38, 74.2], [131.25, 74.5], [131.47, 75.03], [132.0, 75.25], [132.25, 75.15], [132.5, 75.25], [132.75, 75.15], [132.82, 75.18], [132.97, 75.53], [133.5, 75.75], [134.03, 75.53], [134.18, 75.18], [134.25, 75.15], [134.5, 75.25], [134.75, 75.15], [135.0, 75.25], [135.53, 75.03], [135.68, 74.68], [135.75, 74.65], [135.82, 74.68], [135.96, 75.0], [135.82, 75.32], [135.47, 75.47], [135.25, 76.0], [135.47, 76.53], [136.0, 76.75], [136.25, 76.65], [136.5, 76.75], [136.75, 76.65], [136.82, 76.68], [136.97, 77.03], [137.5, 77.25], [137.75, 77.15], [138.0, 77.25], [138.25, 77.15], [138.5, 77.25], [138.75, 77.15], [138.82, 77.18], [138.97, 77.53], [139.5, 77.75], [139.75, 77.65], [140.0, 77.75], [140.25, 77.65], [140.5, 77.75], [140.75, 77.65], [141.0, 77.75], [141.25, 77.65], [141.32, 77.68], [141.47, 78.03], [142.0, 78.25], [142.25, 78.15], [142.5, 78.25], [142.75, 78.15], [143.0, 78.25], [143.25, 78.15], [143.5, 78.25], [143.75, 78.15], [144.0, 78.25], [144.53, 78.03], [144.68, 77.68], [144.75, 77.65], [145.0, 77.75], [145.25, 77.65], [145.5, 77.75], [146.03, 77.53], [146.25, 77.0], [146.03, 76.47], [145.5, 76.25], [145.25, 76.35], [145.0, 76.25], [144.75, 76.35], [144.5, 76.25], [144.25, 76.35], [144.0, 76.25], [143.75, 76.35], [143.5, 76.25], [143.25, 76.35], [143.0, 76.25], [142.75, 76.35], [142.5, 76.25], [142.25, 76.35], [142.0, 76.25], [142.53, 76.03], [142.75, 75.5], [142.53, 74.97], [142.18, 74.82], [142.03, 74.47], [141.5, 74.25], [141.25, 74.35], [141.0, 74.25], [140.75, 74.35], [140.68, 74.32], [140.53, 73.97], [140.0, 73.75], [139.75, 73.85], [139.5, 73.75], [139.25, 73.85], [139.18, 73.82], [139.03, 73.47], [138.5, 73.25], [138.25, 73.35], [138.0, 73.25], [137.75, 73.35], [137.5, 73.25], [137.25, 73.35], [137.18, 73.32], [137.03, 72.97], [136.68, 72.82], [136.53, 72.47], [136.0, 72.25], [135.75, 72.35], [135.5, 72.25], [135.25, 72.35], [135.0, 72.25], [134.75, 72.35], [134.68, 72.32], [134.53, 71.97], [134.0, 71.75], [133.75, 71.85], [133.5, 71.75], [133.25, 71.85], [133.0, 71.75], [132.75, 71.85], [132.5, 71.75], [132.25, 71.85], [132.0, 71.75], [131.47, 71.97], [131.25, 72.5], [131.35, 72.75], [131.32, 72.82], [131.25, 72.85], [131.0, 72.75], [130.75, 72.85], [130.5, 72.75], [130.25, 72.85], [130.0, 72.75], [129.75, 72.85], [129.5, 72.75], [129.25, 72.85], [129.0, 72.75]], [[141.75, 76.35], [141.5, 76.25], [141.75, 76.15], [142.0, 76.25], [141.75, 76.35]], [[141.25, 76.35], [141.18, 76.32], [141.13, 76.2], [141.25, 76.15], [141.5, 76.25], [141.25, 76.35]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 12.907046296349165}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 8.299911145828439}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.963152737087654, -15.677002371375522, -17.186513856619854, -17.506879402934572]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-19.322215779622383, -14.636817677815714, -14.787098948160804, -16.063700103759743]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [8.809589865304735, 9.359849366941416, 7.95718074394961, 7.518691855009391]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [9.53082729542075, 12.907046296349165, 10.829204547592127, 10.47929683624676]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2772712935225576, 1.7833970736210043, 1.512318735869301, 1.4221756786191406]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3509020779299514, 2.1861806401171644, 1.8517352705923524, 1.5857102862742558]}}