{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:06.826549", "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-Dec-12_to_2022-Dec-17_127.0_57.0"}, "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": 2022120000656}, "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 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 17 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 76262.27252435664}, "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": 57.0}, "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": 127.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[127.03, 55.97], [126.5, 55.75], [126.25, 55.85], [126.0, 55.75], [125.47, 55.97], [125.25, 56.5], [125.35, 56.75], 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all IPCC regions affected", "value": ["E.Siberia", "Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, 60.0], [124.97, 60.53], [125.32, 60.68], [125.47, 61.03], [126.0, 61.25], [126.25, 61.15], [126.32, 61.18], [126.47, 61.53], [127.0, 61.75], [127.53, 61.53], [127.68, 61.18], [128.0, 61.04], [128.5, 61.25], [129.03, 61.03], [129.18, 60.68], [129.25, 60.65], [129.5, 60.75], [129.75, 60.65], [130.0, 60.75], [130.25, 60.65], [130.5, 60.75], [131.03, 60.53], [131.25, 60.0], [131.03, 59.47], [130.68, 59.32], [130.53, 58.97], [130.0, 58.75], [129.75, 58.85], [129.68, 58.82], [129.53, 58.47], [129.0, 58.25], [128.75, 58.35], [128.5, 58.25], [128.25, 58.35], [128.0, 58.25], [127.75, 58.35], [127.5, 58.25], [127.25, 58.35], [127.18, 58.32], [127.03, 57.97], [126.68, 57.82], [126.53, 57.47], [126.0, 57.25], 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"description": "The daily evolution of mean t2m.", "value": [-41.70150510452024, -43.17667128370928, -43.226620508825334, -40.52409961736498, -40.869581433783964, -41.592511534001915]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-43.53475303891858, -46.73756810774185, -46.535210572465616, -43.10968766012343, -41.33921084299186, -42.57808639612281]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.952993953317941, -12.128006542308745, -12.0113262796388, -9.079454919595225, -8.377605844024222, -9.141419199320808]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.973833073299232, -16.298733919263015, -14.85136862968207, -10.821633164415772, -8.944517279036859, -10.152044437994903]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4190514637556038, -1.6181924784000998, -1.5894901260567869, -1.442514805321307, -1.5041400439591597, -1.5676918113382152]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5558130615778485, -2.1534406561422696, -2.1401922359015426, -1.776489365359862, -1.5416536790968665, -1.6814025060972766]}}