{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:30.806039", "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": "2011-Jan-06_to_2011-Jan-11_131.5_64.5"}, "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": 2011010000446}, "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 06 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 11 2011"}, "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": 75648.45743544333}, "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.Siberia", "Russian-Arctic", "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": []}, "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": 64.5}, "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": 131.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "131.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 134.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.25}, "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": {"2011-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.5, 65.25], [132.03, 65.03], [132.25, 64.5], [132.03, 63.97], [131.5, 63.75], [130.97, 63.97], [130.75, 64.5], [130.97, 65.03], [131.5, 65.25]]]]}, "2011-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, 63.97], [130.75, 64.5], [130.97, 65.03], [131.5, 65.25], [132.03, 65.03], [132.25, 64.5], [132.03, 63.97], [131.5, 63.75], [130.97, 63.97]]], [[[126.5, 67.25], [126.75, 67.15], [127.0, 67.25], [127.25, 67.15], [127.32, 67.18], [127.47, 67.53], [127.82, 67.68], [127.97, 68.03], [128.5, 68.25], [129.03, 68.03], [129.18, 67.68], [129.25, 67.65], [129.5, 67.75], [130.03, 67.53], [130.25, 67.0], [130.13, 66.7], [130.53, 66.53], [130.75, 66.0], [130.53, 65.47], [130.18, 65.32], [130.15, 65.25], [130.25, 65.0], [130.03, 64.47], [129.5, 64.25], [129.25, 64.35], [129.0, 64.25], [128.75, 64.35], [128.5, 64.25], [128.25, 64.35], [128.0, 64.25], [127.75, 64.35], [127.5, 64.25], [126.97, 64.47], [126.75, 65.0], [126.88, 65.3], [126.47, 65.47], [126.32, 65.82], [125.97, 65.97], [125.75, 66.5], [125.97, 67.03], [126.5, 67.25]]], [[[133.53, 67.53], [133.75, 67.0], [133.65, 66.75], [133.75, 66.5], [133.53, 65.97], [133.0, 65.75], [132.47, 65.97], [132.25, 66.5], [132.35, 66.75], [132.25, 67.0], [132.47, 67.53], [133.0, 67.75], [133.53, 67.53]]]]}, "2011-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.75, 66.5], [125.97, 67.03], [126.5, 67.25], [126.75, 67.15], [126.82, 67.18], [126.85, 67.25], [126.75, 67.5], [126.97, 68.03], [127.5, 68.25], [128.0, 68.04], [128.5, 68.25], [129.03, 68.03], [129.18, 67.68], [129.25, 67.65], [129.5, 67.75], [129.75, 67.65], [130.0, 67.75], [130.25, 67.65], [130.5, 67.75], [131.03, 67.53], [131.18, 67.18], [131.25, 67.15], [131.32, 67.18], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.5, 67.75], [132.75, 67.65], [133.0, 67.75], [133.53, 67.53], [133.75, 67.0], [133.65, 66.75], [133.68, 66.68], [134.03, 66.53], [134.18, 66.18], [134.53, 66.03], [134.75, 65.5], [134.53, 64.97], [134.0, 64.75], [133.75, 64.85], [133.5, 64.75], [132.97, 64.97], [132.82, 65.32], [132.47, 65.47], [132.32, 65.82], [132.25, 65.85], [132.18, 65.82], [132.03, 65.47], [131.68, 65.32], [131.65, 65.25], [131.68, 65.18], [132.03, 65.03], [132.25, 64.5], [132.03, 63.97], [131.5, 63.75], [131.25, 63.85], [131.0, 63.75], [130.75, 63.85], [130.5, 63.75], [130.25, 63.85], [130.0, 63.75], [129.75, 63.85], [129.5, 63.75], [129.25, 63.85], [129.0, 63.75], [128.75, 63.85], [128.5, 63.75], [128.25, 63.85], [128.0, 63.75], [127.47, 63.97], [127.32, 64.32], [126.97, 64.47], [126.75, 65.0], [126.85, 65.25], [126.82, 65.32], [126.47, 65.47], [126.32, 65.82], [125.97, 65.97], [125.75, 66.5]]]]}, "2011-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.75, 66.5], [125.97, 67.03], [126.5, 67.25], [126.75, 67.15], [126.82, 67.18], [126.85, 67.25], [126.75, 67.5], [126.97, 68.03], [127.5, 68.25], [128.0, 68.04], [128.5, 68.25], [129.03, 68.03], [129.18, 67.68], [129.25, 67.65], [129.5, 67.75], [129.75, 67.65], [130.0, 67.75], [130.25, 67.65], [130.5, 67.75], [131.03, 67.53], [131.18, 67.18], [131.25, 67.15], [131.32, 67.18], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.5, 67.75], [132.75, 67.65], [133.0, 67.75], [133.53, 67.53], [133.75, 67.0], [133.65, 66.75], [133.68, 66.68], [134.03, 66.53], [134.18, 66.18], [134.53, 66.03], [134.75, 65.5], [134.53, 64.97], [134.0, 64.75], [133.75, 64.85], [133.5, 64.75], [132.97, 64.97], [132.82, 65.32], [132.47, 65.47], [132.32, 65.82], [132.25, 65.85], [132.18, 65.82], [132.03, 65.47], [131.68, 65.32], [131.65, 65.25], [131.68, 65.18], [132.03, 65.03], [132.25, 64.5], [132.03, 63.97], [131.5, 63.75], [131.25, 63.85], [131.0, 63.75], [130.75, 63.85], [130.5, 63.75], [130.25, 63.85], [130.0, 63.75], [129.75, 63.85], [129.5, 63.75], [129.25, 63.85], [129.0, 63.75], [128.75, 63.85], [128.5, 63.75], [128.25, 63.85], [128.0, 63.75], [127.47, 63.97], [127.32, 64.32], [126.97, 64.47], [126.75, 65.0], [126.85, 65.25], [126.82, 65.32], [126.47, 65.47], [126.32, 65.82], [125.97, 65.97], [125.75, 66.5]]]]}, "2011-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.75, 66.5], [125.97, 67.03], [126.5, 67.25], [126.75, 67.15], [126.82, 67.18], [126.85, 67.25], [126.75, 67.5], [126.97, 68.03], [127.5, 68.25], [128.03, 68.03], [128.18, 67.68], [128.5, 67.54], [129.0, 67.75], [129.25, 67.65], [129.5, 67.75], [129.75, 67.65], [130.0, 67.75], [130.25, 67.65], [130.5, 67.75], [131.03, 67.53], [131.18, 67.18], [131.25, 67.15], [131.32, 67.18], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.5, 67.75], [132.75, 67.65], [133.0, 67.75], [133.53, 67.53], [133.75, 67.0], [133.65, 66.75], [133.68, 66.68], [134.03, 66.53], [134.18, 66.18], [134.53, 66.03], [134.75, 65.5], [134.53, 64.97], [134.0, 64.75], [133.75, 64.85], [133.5, 64.75], [132.97, 64.97], [132.82, 65.32], [132.47, 65.47], [132.32, 65.82], [132.25, 65.85], [132.18, 65.82], [132.03, 65.47], [131.68, 65.32], [131.65, 65.25], [131.68, 65.18], [132.03, 65.03], [132.25, 64.5], [132.03, 63.97], [131.5, 63.75], [131.25, 63.85], [131.0, 63.75], [130.75, 63.85], [130.5, 63.75], [130.25, 63.85], [130.0, 63.75], [129.75, 63.85], [129.5, 63.75], [129.25, 63.85], [129.0, 63.75], [128.75, 63.85], [128.5, 63.75], [128.25, 63.85], [128.0, 63.75], [127.47, 63.97], [127.25, 64.5], [127.38, 64.8], [126.97, 64.97], [126.82, 65.32], [126.47, 65.47], [126.32, 65.82], [125.97, 65.97], [125.75, 66.5]], [[129.5, 65.75], [129.8, 65.63], [129.85, 65.75], [129.82, 65.82], [129.47, 65.97], [129.32, 66.32], [129.25, 66.35], [129.18, 66.32], [129.15, 66.25], [129.25, 66.0], [129.15, 65.75], [129.18, 65.68], [129.25, 65.65], [129.5, 65.75]]]]}, "2011-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.5, 65.25], [132.03, 65.03], [132.25, 64.5], [132.03, 63.97], [131.5, 63.75], [130.97, 63.97], [130.75, 64.5], [130.97, 65.03], [131.5, 65.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.226696623124496}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.667789102922336}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-42.120250030378315, -42.84243126820215, -46.02229423601142, -45.64144926141165, -45.31443648317668, -40.60539025516883]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-42.120250030378315, -50.00331273244453, -50.87664801929233, -51.959088882721716, -53.56619711938154, -40.60539025516883]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.293270600719751, -7.506644457123666, -9.245637650368867, -8.976892095923032, -8.363851175810293, -5.9992441891674275]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.293270600719751, -8.766405347149686, -13.692365836657387, -14.226696623124496, -11.217979347390894, -5.9992441891674275]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4370787424896274, -1.5629959290227102, -1.7795853619670028, -1.7004712059155414, -1.5536235080354492, -1.2117758603816884]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4370787424896274, -1.868762980267028, -2.6438852387485645, -2.644325909283537, -1.9313788032193935, -1.2117758603816884]}}