{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:11.385089", "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": "2023-Sep-07_to_2023-Sep-11_139.0_60.5"}, "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": 2023090000233}, "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": "September 07 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 11 2023"}, "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": 93757.8672777311}, "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": 60.5}, "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": 139.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "139.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 131.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 141.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 64.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.0, 59.25], [136.47, 59.47], [136.32, 59.82], [136.25, 59.85], [136.0, 59.75], [135.47, 59.97], [135.32, 60.32], [134.97, 60.47], [134.82, 60.82], [134.47, 60.97], [134.32, 61.32], [133.97, 61.47], [133.82, 61.82], [133.47, 61.97], [133.32, 62.32], [133.25, 62.35], [133.0, 62.25], [132.75, 62.35], [132.5, 62.25], [131.97, 62.47], [131.82, 62.82], [131.75, 62.85], [131.5, 62.75], [131.25, 62.85], [131.0, 62.75], [130.47, 62.97], [130.25, 63.5], [130.47, 64.03], [131.0, 64.25], [131.25, 64.15], [131.32, 64.18], [131.47, 64.53], [132.0, 64.75], [132.53, 64.53], [132.68, 64.18], [132.75, 64.15], [133.0, 64.25], [133.25, 64.15], [133.5, 64.25], [133.75, 64.15], [134.0, 64.25], [134.25, 64.15], [134.5, 64.25], [135.03, 64.03], [135.18, 63.68], [135.25, 63.65], [135.5, 63.75], [135.75, 63.65], [136.0, 63.75], [136.53, 63.53], [136.68, 63.18], [136.75, 63.15], [137.0, 63.25], [137.53, 63.03], [137.75, 62.5], [137.65, 62.25], [137.68, 62.18], [137.75, 62.15], [138.0, 62.25], [138.53, 62.03], [138.7, 61.63], [139.0, 61.75], [139.5, 61.54], [140.0, 61.75], [140.53, 61.53], [140.68, 61.18], [141.03, 61.03], [141.18, 60.68], [141.53, 60.53], [141.75, 60.0], [141.53, 59.47], [141.0, 59.25], [140.75, 59.35], [140.5, 59.25], [140.25, 59.35], [140.0, 59.25], [139.75, 59.35], [139.5, 59.25], [139.25, 59.35], [139.0, 59.25], [138.75, 59.35], [138.5, 59.25], [138.25, 59.35], [138.0, 59.25], [137.75, 59.35], [137.5, 59.25], [137.25, 59.35], [137.0, 59.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.0, 62.75], [130.47, 62.97], [130.25, 63.5], [130.47, 64.03], [131.0, 64.25], [131.25, 64.15], [131.32, 64.18], [131.47, 64.53], [132.0, 64.75], [132.53, 64.53], [132.68, 64.18], [132.75, 64.15], [133.0, 64.25], [133.25, 64.15], [133.5, 64.25], [133.75, 64.15], [134.0, 64.25], [134.25, 64.15], [134.5, 64.25], [135.03, 64.03], [135.18, 63.68], [135.25, 63.65], [135.5, 63.75], [135.75, 63.65], [136.0, 63.75], [136.53, 63.53], [136.68, 63.18], [136.75, 63.15], [137.0, 63.25], [137.53, 63.03], [137.75, 62.5], [137.65, 62.25], [137.68, 62.18], [137.75, 62.15], [138.0, 62.25], [138.53, 62.03], [138.75, 61.5], [138.65, 61.25], [138.68, 61.18], [138.75, 61.15], [139.0, 61.25], [139.53, 61.03], [139.68, 60.68], [139.75, 60.65], [140.0, 60.75], [140.5, 60.54], [141.0, 60.75], [141.53, 60.53], [141.75, 60.0], [141.53, 59.47], [141.0, 59.25], [140.5, 59.46], [140.0, 59.25], [139.75, 59.35], [139.5, 59.25], [139.25, 59.35], [139.0, 59.25], [138.75, 59.35], [138.5, 59.25], [138.25, 59.35], [138.0, 59.25], [137.75, 59.35], [137.5, 59.25], [137.25, 59.35], [137.0, 59.25], [136.47, 59.47], [136.32, 59.82], [136.25, 59.85], [136.0, 59.75], [135.47, 59.97], [135.32, 60.32], [134.97, 60.47], [134.82, 60.82], [134.47, 60.97], [134.32, 61.32], [133.97, 61.47], [133.82, 61.82], [133.47, 61.97], [133.32, 62.32], [133.25, 62.35], [133.0, 62.25], [132.75, 62.35], [132.5, 62.25], [131.97, 62.47], [131.82, 62.82], [131.75, 62.85], [131.5, 62.75], [131.25, 62.85], [131.0, 62.75]]]]}, "2023-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.0, 62.75], [130.47, 62.97], [130.25, 63.5], [130.47, 64.03], [131.0, 64.25], [131.25, 64.15], [131.32, 64.18], [131.47, 64.53], [132.0, 64.75], [132.53, 64.53], [132.68, 64.18], [132.75, 64.15], [133.0, 64.25], [133.25, 64.15], [133.5, 64.25], [133.75, 64.15], [134.0, 64.25], [134.25, 64.15], [134.5, 64.25], [135.03, 64.03], [135.18, 63.68], [135.25, 63.65], [135.5, 63.75], [135.75, 63.65], [136.0, 63.75], [136.53, 63.53], [136.68, 63.18], [136.75, 63.15], [137.0, 63.25], [137.53, 63.03], [137.75, 62.5], [137.65, 62.25], [137.68, 62.18], [137.75, 62.15], [138.0, 62.25], [138.53, 62.03], [138.7, 61.63], [139.0, 61.75], [139.53, 61.53], [139.68, 61.18], [139.75, 61.15], [140.0, 61.25], [140.25, 61.15], [140.5, 61.25], [141.03, 61.03], [141.18, 60.68], [141.53, 60.53], [141.75, 60.0], [141.53, 59.47], [141.0, 59.25], [140.75, 59.35], [140.5, 59.25], [140.25, 59.35], [140.0, 59.25], [139.75, 59.35], [139.5, 59.25], [139.25, 59.35], [139.0, 59.25], [138.75, 59.35], [138.5, 59.25], [138.25, 59.35], [138.0, 59.25], [137.75, 59.35], [137.5, 59.25], [137.25, 59.35], [137.0, 59.25], [136.47, 59.47], [136.32, 59.82], [136.25, 59.85], [136.0, 59.75], [135.47, 59.97], [135.32, 60.32], [134.97, 60.47], [134.82, 60.82], [134.47, 60.97], [134.32, 61.32], [133.97, 61.47], [133.82, 61.82], [133.47, 61.97], [133.32, 62.32], [133.25, 62.35], [133.0, 62.25], [132.75, 62.35], [132.5, 62.25], [131.97, 62.47], [131.82, 62.82], [131.75, 62.85], [131.5, 62.75], [131.25, 62.85], [131.0, 62.75]]]]}, "2023-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.0, 62.75], [130.47, 62.97], [130.25, 63.5], [130.47, 64.03], [131.0, 64.25], [131.25, 64.15], [131.32, 64.18], [131.47, 64.53], [132.0, 64.75], [132.53, 64.53], [132.68, 64.18], [132.75, 64.15], [133.0, 64.25], [133.25, 64.15], [133.5, 64.25], [133.75, 64.15], [134.0, 64.25], [134.25, 64.15], [134.5, 64.25], [135.03, 64.03], [135.18, 63.68], [135.25, 63.65], [135.5, 63.75], [135.75, 63.65], [136.0, 63.75], [136.53, 63.53], [136.68, 63.18], [136.75, 63.15], [137.0, 63.25], [137.53, 63.03], [137.75, 62.5], [137.65, 62.25], [137.68, 62.18], [137.75, 62.15], [138.0, 62.25], [138.53, 62.03], [138.7, 61.63], [139.0, 61.75], [139.5, 61.54], [140.0, 61.75], [140.53, 61.53], [140.68, 61.18], [141.03, 61.03], [141.18, 60.68], [141.53, 60.53], [141.75, 60.0], [141.53, 59.47], [141.0, 59.25], [140.75, 59.35], [140.5, 59.25], [140.25, 59.35], [140.0, 59.25], [139.75, 59.35], [139.5, 59.25], [139.25, 59.35], [139.0, 59.25], [138.75, 59.35], [138.5, 59.25], [138.25, 59.35], [138.0, 59.25], [137.75, 59.35], [137.5, 59.25], [137.25, 59.35], [137.0, 59.25], [136.47, 59.47], [136.32, 59.82], [136.25, 59.85], [136.0, 59.75], [135.47, 59.97], [135.32, 60.32], [134.97, 60.47], [134.82, 60.82], [134.47, 60.97], [134.32, 61.32], [133.97, 61.47], [133.82, 61.82], [133.47, 61.97], [133.32, 62.32], [133.25, 62.35], [133.0, 62.25], [132.75, 62.35], [132.5, 62.25], [131.97, 62.47], [131.82, 62.82], [131.75, 62.85], [131.5, 62.75], [131.25, 62.85], [131.0, 62.75]]]]}, "2023-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.0, 59.25], [136.47, 59.47], [136.25, 60.0], [136.47, 60.53], [137.0, 60.75], [137.53, 60.53], [137.75, 60.0], [137.53, 59.47], [137.0, 59.25]]], [[[139.0, 61.75], [139.5, 61.54], [140.0, 61.75], [140.53, 61.53], [140.68, 61.18], [141.03, 61.03], [141.25, 60.5], [141.15, 60.25], [141.25, 60.0], [141.03, 59.47], [140.5, 59.25], [139.97, 59.47], [139.82, 59.82], [139.75, 59.85], [139.5, 59.75], [139.25, 59.85], [139.0, 59.75], [138.75, 59.85], [138.5, 59.75], [137.97, 59.97], [137.75, 60.5], [137.97, 61.03], [138.32, 61.18], [138.47, 61.53], [139.0, 61.75]]]]}, "2023-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.5, 59.75], [137.97, 59.97], [137.75, 60.5], [137.97, 61.03], [138.5, 61.25], [138.75, 61.15], [139.0, 61.25], [139.3, 61.13], [139.47, 61.53], [140.0, 61.75], [140.53, 61.53], [140.75, 61.0], [140.65, 60.75], [140.75, 60.5], [140.53, 59.97], [140.0, 59.75], [139.5, 59.96], [139.0, 59.75], [138.75, 59.85], [138.5, 59.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.182366828440877}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.005907056918153}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.684578946671479, 1.5879603489431702, 1.6141689386526537, -0.2513632927261824, -0.263965927009167]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.1635190077094535, -0.763982970914924, -2.212537603530791, -2.0091798176059115, -0.8902192055540468]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.813528623593544, -5.434728295672326, -4.930451073293747, -4.457231127730008, -3.4832764084107026]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.0390967601423995, -7.182366828440877, -6.3087363967073316, -5.356371729913974, -3.66263873354103]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.66760654920917, -1.8544343579729428, -1.6784147277624564, -1.6293057591249809, -1.3100442704666055]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9541880490818901, -2.3713216693988386, -2.0864356119789416, -1.977873470766171, -1.3574340183247733]}}