{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:22.534870", "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": "2026-Jan-30_to_2026-Feb-02_57.5_65.0"}, "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": 2026010000797}, "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 30 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 02 2026"}, "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": "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": 146573.65382326956}, "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": ["E.Europe", "Russian-Arctic"]}, "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": []}, "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": 65.0}, "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": 57.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "57.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 47.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 64.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.47, 62.97], [47.25, 63.5], [47.47, 64.03], [48.0, 64.25], [48.25, 64.15], [48.5, 64.25], [48.75, 64.15], [48.82, 64.18], [48.97, 64.53], [49.5, 64.75], [49.75, 64.65], [50.0, 64.75], [50.25, 64.65], [50.5, 64.75], [50.75, 64.65], [51.0, 64.75], [51.25, 64.65], [51.5, 64.75], [51.75, 64.65], [52.0, 64.75], [52.25, 64.65], [52.32, 64.68], [52.47, 65.03], [53.0, 65.25], [53.25, 65.15], [53.32, 65.18], [53.47, 65.53], [54.0, 65.75], [54.25, 65.65], [54.5, 65.75], [54.75, 65.65], [54.82, 65.68], [54.97, 66.03], [55.5, 66.25], [55.75, 66.15], [56.0, 66.25], [56.25, 66.15], [56.32, 66.18], [56.47, 66.53], [57.0, 66.75], [57.25, 66.65], [57.5, 66.75], [57.75, 66.65], [58.0, 66.75], [58.25, 66.65], [58.5, 66.75], [58.75, 66.65], [58.82, 66.68], [58.97, 67.03], [59.5, 67.25], [59.75, 67.15], [59.82, 67.18], [59.97, 67.53], [60.5, 67.75], [60.75, 67.65], [60.82, 67.68], [60.97, 68.03], [61.5, 68.25], [61.75, 68.15], [62.0, 68.25], [62.5, 68.04], [63.0, 68.25], [63.25, 68.15], [63.5, 68.25], [64.03, 68.03], [64.18, 67.68], [64.53, 67.53], [64.75, 67.0], [64.53, 66.47], [64.0, 66.25], [63.75, 66.35], [63.5, 66.25], [63.25, 66.35], [63.18, 66.32], [63.03, 65.97], [62.5, 65.75], [62.25, 65.85], [62.18, 65.82], [62.03, 65.47], [61.5, 65.25], [61.25, 65.35], [61.0, 65.25], [60.75, 65.35], [60.5, 65.25], [60.25, 65.35], [60.18, 65.32], [60.03, 64.97], [59.68, 64.82], [59.53, 64.47], [59.18, 64.32], [59.03, 63.97], [58.5, 63.75], [58.25, 63.85], [58.0, 63.75], [57.75, 63.85], [57.68, 63.82], [57.53, 63.47], [57.0, 63.25], [56.75, 63.35], [56.68, 63.32], [56.53, 62.97], [56.0, 62.75], [55.75, 62.85], [55.5, 62.75], [55.25, 62.85], [55.18, 62.82], [55.03, 62.47], [54.5, 62.25], [54.25, 62.35], [54.0, 62.25], [53.75, 62.35], [53.5, 62.25], [53.25, 62.35], [53.0, 62.25], [52.75, 62.35], [52.68, 62.32], [52.53, 61.97], [52.0, 61.75], [51.75, 61.85], [51.5, 61.75], [51.25, 61.85], [51.0, 61.75], [50.75, 61.85], [50.5, 61.75], [50.25, 61.85], [50.0, 61.75], [49.47, 61.97], [49.32, 62.32], [49.25, 62.35], [49.0, 62.25], [48.47, 62.47], [48.32, 62.82], [48.25, 62.85], [48.0, 62.75], [47.47, 62.97]]]]}, "2026-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.47, 62.97], [47.25, 63.5], [47.47, 64.03], [48.0, 64.25], [48.25, 64.15], [48.5, 64.25], [48.75, 64.15], [48.82, 64.18], [48.97, 64.53], [49.5, 64.75], [49.75, 64.65], [50.0, 64.75], [50.25, 64.65], [50.5, 64.75], [50.75, 64.65], [51.0, 64.75], [51.25, 64.65], [51.5, 64.75], [51.75, 64.65], [52.0, 64.75], [52.25, 64.65], [52.32, 64.68], [52.47, 65.03], [53.0, 65.25], [53.25, 65.15], [53.32, 65.18], [53.47, 65.53], [54.0, 65.75], [54.25, 65.65], [54.5, 65.75], [54.75, 65.65], [54.82, 65.68], [54.97, 66.03], [55.5, 66.25], [55.75, 66.15], [56.0, 66.25], [56.25, 66.15], [56.32, 66.18], [56.47, 66.53], [57.0, 66.75], [57.25, 66.65], [57.5, 66.75], [57.75, 66.65], [58.0, 66.75], [58.25, 66.65], [58.5, 66.75], [58.75, 66.65], [58.82, 66.68], [58.97, 67.03], [59.5, 67.25], [59.75, 67.15], [59.82, 67.18], [59.97, 67.53], [60.5, 67.75], [60.75, 67.65], [60.82, 67.68], [60.97, 68.03], [61.5, 68.25], [61.75, 68.15], [62.0, 68.25], [62.5, 68.04], [63.0, 68.25], [63.25, 68.15], [63.5, 68.25], [64.03, 68.03], [64.18, 67.68], [64.53, 67.53], [64.75, 67.0], [64.53, 66.47], [64.0, 66.25], [63.75, 66.35], [63.5, 66.25], [63.25, 66.35], [63.18, 66.32], [63.03, 65.97], [62.5, 65.75], [62.25, 65.85], [62.18, 65.82], [62.03, 65.47], [61.5, 65.25], [61.25, 65.35], [61.0, 65.25], [60.75, 65.35], [60.5, 65.25], [60.25, 65.35], [60.18, 65.32], [60.03, 64.97], [59.68, 64.82], [59.53, 64.47], [59.18, 64.32], [59.03, 63.97], [58.5, 63.75], [58.25, 63.85], [58.0, 63.75], [57.75, 63.85], [57.68, 63.82], [57.53, 63.47], [57.0, 63.25], [56.75, 63.35], [56.68, 63.32], [56.53, 62.97], [56.0, 62.75], [55.75, 62.85], [55.5, 62.75], [55.25, 62.85], [55.18, 62.82], [55.03, 62.47], [54.5, 62.25], [54.25, 62.35], [54.0, 62.25], [53.75, 62.35], [53.5, 62.25], [53.25, 62.35], [53.0, 62.25], [52.75, 62.35], [52.68, 62.32], [52.53, 61.97], [52.0, 61.75], [51.75, 61.85], [51.5, 61.75], [51.25, 61.85], [51.0, 61.75], [50.75, 61.85], [50.5, 61.75], [50.25, 61.85], [50.0, 61.75], [49.47, 61.97], [49.32, 62.32], [49.25, 62.35], [49.0, 62.25], [48.47, 62.47], [48.32, 62.82], [48.25, 62.85], [48.0, 62.75], [47.47, 62.97]]]]}, "2026-02-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[47.47, 62.97], [47.25, 63.5], [47.47, 64.03], [48.0, 64.25], [48.25, 64.15], [48.5, 64.25], [48.75, 64.15], [48.82, 64.18], [48.97, 64.53], [49.5, 64.75], [49.75, 64.65], [50.0, 64.75], [50.25, 64.65], [50.5, 64.75], [50.75, 64.65], [51.0, 64.75], [51.25, 64.65], [51.5, 64.75], [51.75, 64.65], [52.0, 64.75], [52.25, 64.65], [52.32, 64.68], [52.47, 65.03], [53.0, 65.25], [53.25, 65.15], [53.32, 65.18], [53.47, 65.53], [54.0, 65.75], [54.25, 65.65], [54.5, 65.75], [54.75, 65.65], [54.82, 65.68], [54.97, 66.03], [55.5, 66.25], [55.75, 66.15], [56.0, 66.25], [56.25, 66.15], [56.32, 66.18], [56.47, 66.53], [57.0, 66.75], [57.25, 66.65], [57.5, 66.75], [57.75, 66.65], [58.0, 66.75], [58.25, 66.65], [58.5, 66.75], [58.75, 66.65], [58.82, 66.68], [58.97, 67.03], [59.5, 67.25], [59.75, 67.15], [59.82, 67.18], [59.97, 67.53], [60.5, 67.75], [60.75, 67.65], [60.82, 67.68], [60.97, 68.03], [61.5, 68.25], [61.75, 68.15], [62.0, 68.25], [62.5, 68.04], [63.0, 68.25], [63.25, 68.15], [63.5, 68.25], [64.03, 68.03], [64.18, 67.68], [64.53, 67.53], [64.75, 67.0], [64.53, 66.47], [64.0, 66.25], [63.75, 66.35], [63.5, 66.25], [63.25, 66.35], [63.18, 66.32], [63.03, 65.97], [62.5, 65.75], [62.25, 65.85], [62.18, 65.82], [62.03, 65.47], [61.5, 65.25], [61.25, 65.35], [61.0, 65.25], [60.75, 65.35], [60.5, 65.25], [60.25, 65.35], [60.18, 65.32], [60.03, 64.97], [59.68, 64.82], [59.53, 64.47], [59.18, 64.32], [59.03, 63.97], [58.5, 63.75], [58.25, 63.85], [58.0, 63.75], [57.75, 63.85], [57.68, 63.82], [57.53, 63.47], [57.0, 63.25], [56.75, 63.35], [56.68, 63.32], [56.53, 62.97], [56.0, 62.75], [55.75, 62.85], [55.5, 62.75], [55.25, 62.85], [55.18, 62.82], [55.03, 62.47], [54.5, 62.25], [54.25, 62.35], [54.0, 62.25], [53.75, 62.35], [53.5, 62.25], [53.25, 62.35], [53.0, 62.25], [52.75, 62.35], [52.68, 62.32], [52.53, 61.97], [52.0, 61.75], [51.75, 61.85], [51.5, 61.75], [51.25, 61.85], [51.0, 61.75], [50.75, 61.85], [50.5, 61.75], [50.25, 61.85], [50.0, 61.75], [49.47, 61.97], [49.32, 62.32], [49.25, 62.35], [49.0, 62.25], [48.47, 62.47], [48.32, 62.82], [48.25, 62.85], [48.0, 62.75], [47.47, 62.97]]]]}, "2026-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[56.85, 65.75], [56.75, 66.0], [56.97, 66.53], [57.5, 66.75], [57.75, 66.65], [58.0, 66.75], [58.53, 66.53], [58.68, 66.18], [59.03, 66.03], [59.18, 65.68], [59.53, 65.53], [59.75, 65.0], [59.53, 64.47], [59.18, 64.32], [59.03, 63.97], [58.5, 63.75], [58.25, 63.85], [58.0, 63.75], [57.47, 63.97], [57.32, 64.32], [56.97, 64.47], [56.75, 65.0], [56.85, 65.25], [56.75, 65.5], [56.85, 65.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -21.2890937714796}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -15.770538793674087}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-31.608348563483588, -36.23824402863556, -33.83844353042926, -31.570042269157597]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-36.26153984069822, -39.27259674072263, -39.11306800842283, -33.075909042358376]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-13.688970616260484, -18.23084998211331, -15.69996983957297, -12.660782401072414]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-17.56037859342902, -20.157745237564143, -21.2890937714796, -14.296208178933625]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.590227142198347, -2.115997663077772, -1.8172424114709407, -1.4645683310656104]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9678878592677838, -2.3552632527683888, -2.469336399631294, -1.6443486821757551]}}