{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:50.946887", "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-Jan-02_to_2022-Jan-07_136.5_53.5"}, "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": 2022010000236}, "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": "January 02 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 07 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": 111219.9938102677}, "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": ["Russian-Far-East"]}, "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": ["Sea of Okhotsk"]}, "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": 53.5}, "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": 136.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "136.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 133.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.0, 54.75], [137.25, 54.65], [137.5, 54.75], [138.0, 54.54], [138.5, 54.75], [138.75, 54.65], [139.0, 54.75], [139.25, 54.65], [139.5, 54.75], [139.75, 54.65], [140.0, 54.75], [140.53, 54.53], [140.68, 54.18], [141.03, 54.03], [141.25, 53.5], [141.03, 52.97], [140.5, 52.75], [139.97, 52.97], [139.82, 53.32], [139.75, 53.35], [139.5, 53.25], [139.25, 53.35], [139.0, 53.25], [138.75, 53.35], [138.68, 53.32], [138.53, 52.97], [138.0, 52.75], [137.75, 52.85], [137.5, 52.75], [137.25, 52.85], [137.0, 52.75], [136.75, 52.85], [136.5, 52.75], [135.97, 52.97], [135.75, 53.5], [135.97, 54.03], [136.32, 54.18], [136.47, 54.53], [137.0, 54.75]]]]}, "2022-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[133.97, 48.97], [133.75, 49.5], [133.97, 50.03], [134.5, 50.25], [135.03, 50.03], [135.25, 49.5], [135.03, 48.97], [134.5, 48.75], [133.97, 48.97]]], [[[135.82, 53.68], [135.97, 54.03], [136.32, 54.18], [136.47, 54.53], [137.0, 54.75], [137.25, 54.65], [137.5, 54.75], [138.0, 54.54], [138.5, 54.75], [138.75, 54.65], [139.0, 54.75], [139.25, 54.65], [139.5, 54.75], [139.75, 54.65], [140.0, 54.75], [140.53, 54.53], [140.68, 54.18], [141.03, 54.03], [141.25, 53.5], [141.03, 52.97], [140.5, 52.75], [139.97, 52.97], [139.82, 53.32], [139.75, 53.35], [139.5, 53.25], [139.25, 53.35], [139.13, 53.3], [139.18, 53.18], [139.53, 53.03], [139.75, 52.5], [139.53, 51.97], [139.18, 51.82], [139.03, 51.47], [138.5, 51.25], [138.25, 51.35], [138.0, 51.25], [137.75, 51.35], [137.5, 51.25], [136.97, 51.47], [136.75, 52.0], [136.93, 52.43], [136.68, 52.32], [136.53, 51.97], [136.0, 51.75], [135.47, 51.97], [135.25, 52.5], [135.35, 52.75], [135.25, 53.0], [135.47, 53.53], [135.82, 53.68]]]]}, "2022-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[133.82, 49.68], [133.97, 50.03], [134.5, 50.25], [134.75, 50.15], [135.0, 50.25], [135.25, 50.15], [135.5, 50.25], [135.75, 50.15], [135.82, 50.18], [135.88, 50.3], [135.47, 50.47], [135.25, 51.0], [135.35, 51.25], [135.25, 51.5], [135.35, 51.75], [135.25, 52.0], [135.35, 52.25], [135.25, 52.5], [135.35, 52.75], [135.25, 53.0], [135.47, 53.53], [135.82, 53.68], [135.97, 54.03], [136.32, 54.18], [136.47, 54.53], [137.0, 54.75], [137.25, 54.65], [137.5, 54.75], [138.0, 54.54], [138.5, 54.75], [138.75, 54.65], [139.0, 54.75], [139.25, 54.65], [139.5, 54.75], [139.75, 54.65], [140.0, 54.75], [140.53, 54.53], [140.68, 54.18], [141.03, 54.03], [141.25, 53.5], [141.03, 52.97], [140.5, 52.75], [139.97, 52.97], [139.82, 53.32], [139.75, 53.35], [139.63, 53.3], [139.75, 53.0], [139.65, 52.75], [139.75, 52.5], [139.53, 51.97], [139.18, 51.82], [139.03, 51.47], [138.68, 51.32], [138.54, 51.0], [138.75, 50.5], [138.65, 50.25], [138.75, 50.0], [138.53, 49.47], [138.0, 49.25], [137.75, 49.35], [137.68, 49.32], [137.53, 48.97], [137.0, 48.75], [136.75, 48.85], [136.5, 48.75], [136.25, 48.85], [136.18, 48.82], [136.03, 48.47], [135.68, 48.32], [135.53, 47.97], [135.0, 47.75], [134.47, 47.97], [134.32, 48.32], [134.25, 48.35], [134.18, 48.32], [134.03, 47.97], [133.5, 47.75], [132.97, 47.97], [132.75, 48.5], [132.97, 49.03], [133.32, 49.18], [133.47, 49.53], [133.82, 49.68]]]]}, "2022-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[133.82, 49.68], [133.97, 50.03], [134.5, 50.25], [134.75, 50.15], [135.0, 50.25], [135.25, 50.15], [135.5, 50.25], [135.75, 50.15], [135.82, 50.18], [135.88, 50.3], [135.47, 50.47], [135.25, 51.0], [135.35, 51.25], [135.25, 51.5], [135.35, 51.75], [135.25, 52.0], [135.35, 52.25], [135.25, 52.5], [135.35, 52.75], [135.25, 53.0], [135.47, 53.53], [135.82, 53.68], [135.97, 54.03], [136.5, 54.25], [136.75, 54.15], [136.82, 54.18], [136.97, 54.53], [137.5, 54.75], [138.0, 54.54], [138.5, 54.75], [138.75, 54.65], [139.0, 54.75], [139.53, 54.53], [139.75, 54.0], [139.54, 53.5], [139.75, 53.0], [139.65, 52.75], [139.75, 52.5], [139.53, 51.97], [139.18, 51.82], [139.03, 51.47], [138.68, 51.32], [138.54, 51.0], [138.75, 50.5], [138.65, 50.25], [138.75, 50.0], [138.53, 49.47], [138.0, 49.25], [137.75, 49.35], [137.68, 49.32], [137.53, 48.97], [137.0, 48.75], [136.75, 48.85], [136.5, 48.75], [136.25, 48.85], [136.18, 48.82], [136.03, 48.47], [135.68, 48.32], [135.53, 47.97], [135.0, 47.75], [134.47, 47.97], [134.32, 48.32], [134.25, 48.35], [134.18, 48.32], [134.03, 47.97], [133.5, 47.75], [132.97, 47.97], [132.75, 48.5], [132.97, 49.03], [133.32, 49.18], [133.47, 49.53], [133.82, 49.68]]]]}, "2022-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[133.82, 49.68], [133.97, 50.03], [134.5, 50.25], [134.75, 50.15], [135.0, 50.25], [135.25, 50.15], [135.5, 50.25], [135.75, 50.15], [135.82, 50.18], [135.88, 50.3], [135.47, 50.47], [135.25, 51.0], [135.35, 51.25], [135.25, 51.5], [135.35, 51.75], [135.25, 52.0], [135.35, 52.25], [135.25, 52.5], [135.35, 52.75], [135.25, 53.0], [135.47, 53.53], [135.82, 53.68], [135.97, 54.03], [136.5, 54.25], [136.75, 54.15], [136.82, 54.18], [136.97, 54.53], [137.5, 54.75], [138.0, 54.54], [138.5, 54.75], [138.75, 54.65], [139.0, 54.75], [139.53, 54.53], [139.75, 54.0], [139.54, 53.5], [139.75, 53.0], [139.65, 52.75], [139.75, 52.5], [139.53, 51.97], [139.18, 51.82], [139.03, 51.47], [138.68, 51.32], [138.54, 51.0], [138.75, 50.5], [138.65, 50.25], [138.75, 50.0], [138.53, 49.47], [138.0, 49.25], [137.75, 49.35], [137.68, 49.32], [137.53, 48.97], [137.0, 48.75], [136.75, 48.85], [136.5, 48.75], [136.25, 48.85], [136.18, 48.82], [136.03, 48.47], [135.68, 48.32], [135.53, 47.97], [135.0, 47.75], [134.47, 47.97], [134.32, 48.32], [134.25, 48.35], [134.18, 48.32], [134.03, 47.97], [133.5, 47.75], [132.97, 47.97], [132.75, 48.5], [132.97, 49.03], [133.32, 49.18], [133.47, 49.53], [133.82, 49.68]]]]}, "2022-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.35, 52.25], [135.25, 52.5], [135.35, 52.75], [135.25, 53.0], [135.47, 53.53], [135.82, 53.68], [135.97, 54.03], [136.5, 54.25], [137.03, 54.03], [137.18, 53.68], [137.53, 53.53], [137.68, 53.18], [138.03, 53.03], [138.18, 52.68], [138.53, 52.53], [138.75, 52.0], [138.65, 51.75], [138.75, 51.5], [138.53, 50.97], [138.0, 50.75], [137.75, 50.85], [137.68, 50.82], [137.65, 50.75], [137.75, 50.5], [137.65, 50.25], [137.75, 50.0], [137.53, 49.47], [137.18, 49.32], [137.03, 48.97], [136.5, 48.75], [136.25, 48.85], [136.0, 48.75], [135.47, 48.97], [135.25, 49.5], [135.47, 50.03], [135.82, 50.18], [135.96, 50.5], [135.82, 50.82], [135.47, 50.97], [135.25, 51.5], [135.35, 51.75], [135.25, 52.0], [135.35, 52.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.594103095146892}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.842687831384549}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-27.9246420256853, -30.503748265862185, -30.80830669465422, -31.376349589394664, -31.967913076908417, -32.87974898737281]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-33.53957027913614, -35.30088171051304, -34.89702620591535, -35.95877316926101, -35.57416178602344, -35.01045810435437]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.477630970183989, -8.437085055462655, -8.612878057952171, -8.846369513302784, -9.332709581300652, -9.246457102012728]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.077058078946493, -10.07484621934421, -10.038654317287325, -11.135461448834803, -11.594103095146892, -10.766701909631905]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.1880207115221773, -1.2620906857731395, -1.3407473047540506, -1.3735332763334271, -1.4666413760019206, -1.3780382783469167]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2713679374047262, -1.4154111980755792, -1.9022375444405346, -1.6636611906129803, -1.837098987978792, -1.6383933542905758]}}