{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:57:06.090012", "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": "2014-Aug-26_to_2014-Aug-29_85.0_65.5"}, "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": 2014080001123}, "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": "August 26 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 29 2014"}, "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": 181059.81308611337}, "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-Arctic", "W.Siberia"]}, "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": 65.5}, "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": 85.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "85.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 80.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 88.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 60.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, 67.75], [81.25, 67.65], [81.5, 67.75], [82.03, 67.53], [82.18, 67.18], [82.25, 67.15], [82.32, 67.18], [82.47, 67.53], [83.0, 67.75], [83.25, 67.65], [83.5, 67.75], [83.75, 67.65], [84.0, 67.75], [84.25, 67.65], [84.32, 67.68], [84.35, 67.75], [84.25, 68.0], [84.46, 68.5], [84.25, 69.0], [84.47, 69.53], [84.82, 69.68], [84.97, 70.03], [85.5, 70.25], [85.75, 70.15], [86.0, 70.25], [86.25, 70.15], [86.5, 70.25], [86.75, 70.15], [87.0, 70.25], [87.25, 70.15], [87.32, 70.18], [87.47, 70.53], [88.0, 70.75], [88.25, 70.65], [88.5, 70.75], [89.03, 70.53], [89.25, 70.0], [89.03, 69.47], [88.68, 69.32], [88.53, 68.97], [88.0, 68.75], [87.75, 68.85], [87.68, 68.82], [87.65, 68.75], [87.75, 68.5], [87.65, 68.25], [87.75, 68.0], [87.65, 67.75], [87.75, 67.5], [87.53, 66.97], [87.18, 66.82], [87.15, 66.75], [87.18, 66.68], [87.53, 66.53], [87.68, 66.18], [88.03, 66.03], [88.25, 65.5], [88.03, 64.97], [87.68, 64.82], [87.65, 64.75], [87.75, 64.5], [87.53, 63.97], [87.18, 63.82], [87.03, 63.47], [86.68, 63.32], [86.65, 63.25], [86.75, 63.0], [86.53, 62.47], [86.0, 62.25], [85.75, 62.35], [85.68, 62.32], [85.65, 62.25], [85.75, 62.0], [85.53, 61.47], [85.18, 61.32], [85.03, 60.97], [84.5, 60.75], [84.25, 60.85], [84.18, 60.82], [84.03, 60.47], [83.68, 60.32], [83.53, 59.97], [83.0, 59.75], [82.75, 59.85], [82.5, 59.75], [81.97, 59.97], [81.82, 60.32], [81.75, 60.35], [81.5, 60.25], [80.97, 60.47], [80.75, 61.0], [80.85, 61.25], [80.75, 61.5], [80.97, 62.03], [81.32, 62.18], [81.47, 62.53], [81.82, 62.68], [81.85, 62.75], [81.75, 63.0], [81.97, 63.53], [82.32, 63.68], [82.47, 64.03], [82.82, 64.18], [82.85, 64.25], [82.82, 64.32], [82.47, 64.47], [82.25, 65.0], [82.35, 65.25], [82.32, 65.32], [82.25, 65.35], [82.0, 65.25], [81.75, 65.35], [81.5, 65.25], [80.97, 65.47], [80.82, 65.82], [80.75, 65.85], [80.5, 65.75], [79.97, 65.97], [79.75, 66.5], [79.97, 67.03], [80.32, 67.18], [80.47, 67.53], [81.0, 67.75]]]]}, "2014-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, 67.75], [81.25, 67.65], [81.5, 67.75], [82.03, 67.53], [82.18, 67.18], [82.25, 67.15], [82.32, 67.18], [82.47, 67.53], [83.0, 67.75], [83.25, 67.65], [83.5, 67.75], [83.75, 67.65], [84.0, 67.75], [84.25, 67.65], [84.32, 67.68], [84.35, 67.75], [84.25, 68.0], [84.46, 68.5], [84.25, 69.0], [84.47, 69.53], [84.82, 69.68], [84.97, 70.03], [85.5, 70.25], [85.75, 70.15], [86.0, 70.25], [86.25, 70.15], [86.5, 70.25], [86.75, 70.15], [87.0, 70.25], [87.25, 70.15], [87.32, 70.18], [87.47, 70.53], [88.0, 70.75], [88.25, 70.65], [88.5, 70.75], [89.03, 70.53], [89.25, 70.0], [89.03, 69.47], [88.68, 69.32], [88.53, 68.97], [88.0, 68.75], [88.53, 68.53], [88.75, 68.0], [88.53, 67.47], [88.0, 67.25], [87.75, 67.35], [87.68, 67.32], [87.53, 66.97], [87.18, 66.82], [87.15, 66.75], [87.18, 66.68], [87.53, 66.53], [87.68, 66.18], [88.03, 66.03], [88.25, 65.5], [88.03, 64.97], [87.68, 64.82], [87.65, 64.75], [87.75, 64.5], [87.53, 63.97], [87.18, 63.82], [87.03, 63.47], [86.68, 63.32], [86.65, 63.25], [86.75, 63.0], [86.53, 62.47], [86.0, 62.25], [85.75, 62.35], [85.68, 62.32], [85.65, 62.25], [85.75, 62.0], [85.53, 61.47], [85.18, 61.32], [85.03, 60.97], [84.5, 60.75], [84.25, 60.85], [84.18, 60.82], [84.03, 60.47], [83.68, 60.32], [83.53, 59.97], [83.0, 59.75], [82.75, 59.85], [82.5, 59.75], [81.97, 59.97], [81.82, 60.32], [81.75, 60.35], [81.5, 60.25], [80.97, 60.47], [80.75, 61.0], [80.85, 61.25], [80.75, 61.5], [80.97, 62.03], [81.32, 62.18], [81.47, 62.53], [81.82, 62.68], [81.85, 62.75], [81.75, 63.0], [81.97, 63.53], [82.32, 63.68], [82.47, 64.03], [82.82, 64.18], [82.85, 64.25], [82.82, 64.32], [82.47, 64.47], [82.25, 65.0], [82.35, 65.25], [82.32, 65.32], [82.25, 65.35], [82.0, 65.25], [81.75, 65.35], [81.5, 65.25], [80.97, 65.47], [80.82, 65.82], [80.75, 65.85], [80.5, 65.75], [79.97, 65.97], [79.75, 66.5], [79.97, 67.03], [80.32, 67.18], [80.47, 67.53], [81.0, 67.75]], [[87.75, 68.85], [87.68, 68.82], [87.65, 68.75], [87.68, 68.68], [87.75, 68.65], [88.0, 68.75], [87.75, 68.85]]]]}, "2014-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.0, 67.75], [81.25, 67.65], [81.5, 67.75], [82.03, 67.53], [82.18, 67.18], [82.25, 67.15], [82.32, 67.18], [82.47, 67.53], [83.0, 67.75], [83.25, 67.65], [83.5, 67.75], [83.75, 67.65], [84.0, 67.75], [84.25, 67.65], [84.32, 67.68], [84.35, 67.75], [84.25, 68.0], [84.46, 68.5], [84.25, 69.0], [84.47, 69.53], [84.82, 69.68], [84.97, 70.03], [85.5, 70.25], [85.75, 70.15], [86.0, 70.25], [86.25, 70.15], [86.5, 70.25], [86.75, 70.15], [87.0, 70.25], [87.25, 70.15], [87.32, 70.18], [87.47, 70.53], [88.0, 70.75], [88.25, 70.65], [88.5, 70.75], [89.03, 70.53], [89.25, 70.0], [89.03, 69.47], [88.68, 69.32], [88.53, 68.97], [88.0, 68.75], [88.53, 68.53], [88.75, 68.0], [88.53, 67.47], [88.0, 67.25], [87.75, 67.35], [87.68, 67.32], [87.53, 66.97], [87.18, 66.82], [87.15, 66.75], [87.18, 66.68], [87.53, 66.53], [87.68, 66.18], [88.03, 66.03], [88.25, 65.5], [88.03, 64.97], [87.68, 64.82], [87.65, 64.75], [87.75, 64.5], [87.53, 63.97], [87.18, 63.82], [87.03, 63.47], [86.68, 63.32], [86.65, 63.25], [86.75, 63.0], [86.53, 62.47], [86.0, 62.25], [85.75, 62.35], [85.68, 62.32], [85.65, 62.25], [85.75, 62.0], [85.53, 61.47], [85.18, 61.32], [85.03, 60.97], [84.5, 60.75], [84.25, 60.85], [84.18, 60.82], [84.03, 60.47], [83.68, 60.32], [83.53, 59.97], [83.0, 59.75], [82.75, 59.85], [82.5, 59.75], [81.97, 59.97], [81.82, 60.32], [81.75, 60.35], [81.5, 60.25], [80.97, 60.47], [80.75, 61.0], [80.85, 61.25], [80.75, 61.5], [80.97, 62.03], [81.32, 62.18], [81.47, 62.53], [81.82, 62.68], [81.85, 62.75], [81.75, 63.0], [81.97, 63.53], [82.32, 63.68], [82.47, 64.03], [82.82, 64.18], [82.85, 64.25], [82.82, 64.32], [82.47, 64.47], [82.25, 65.0], [82.35, 65.25], [82.32, 65.32], [82.25, 65.35], [82.0, 65.25], [81.75, 65.35], [81.5, 65.25], [80.97, 65.47], [80.82, 65.82], [80.75, 65.85], [80.5, 65.75], [79.97, 65.97], [79.75, 66.5], [79.97, 67.03], [80.32, 67.18], [80.47, 67.53], [81.0, 67.75]], [[87.75, 68.85], [87.68, 68.82], [87.65, 68.75], [87.68, 68.68], [87.75, 68.65], [88.0, 68.75], [87.75, 68.85]]]]}, "2014-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[86.97, 67.47], [86.75, 68.0], [86.97, 68.53], [87.5, 68.75], [87.75, 68.65], [88.0, 68.75], [88.53, 68.53], [88.75, 68.0], [88.53, 67.47], [88.0, 67.25], [87.75, 67.35], [87.5, 67.25], [86.97, 67.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.074868747102812}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.137233081792071}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.360138483527862, 4.314755010303713, 5.12240464094765, 5.046034789514124]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.9023256690501853, 1.87897023055217, 2.745162946726225, 4.909725890538709]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.02555095396792, -5.71305569592651, -4.6802207269754925, -4.5265817494081375]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.614890120303926, -6.074868747102812, -5.26447918989868, -4.668947063774567]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4454415762498967, -1.6320193786858692, -1.3371774501569895, -1.326440461609367]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6146458889890205, -1.7867717897813924, -1.5215984844361932, -1.3653019135126934]}}