{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:45.803333", "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": "2016-Dec-06_to_2016-Dec-09_120.0_66.0"}, "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": 2016120000266}, "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 06 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 09 2016"}, "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": 107524.62369646512}, "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"]}, "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": ["Laptev Sea"]}, "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": 66.0}, "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": 120.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "120.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 126.25}, "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": 72.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-12-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.85, 66.25], [118.75, 66.5], [118.97, 67.03], [119.32, 67.18], [119.47, 67.53], [120.0, 67.75], [120.25, 67.65], [120.5, 67.75], [120.75, 67.65], [120.82, 67.68], [120.85, 67.75], [120.75, 68.0], [120.85, 68.25], [120.75, 68.5], [120.85, 68.75], [120.82, 68.82], [120.47, 68.97], [120.25, 69.5], [120.35, 69.75], [120.25, 70.0], [120.35, 70.25], [120.32, 70.32], [119.97, 70.47], [119.82, 70.82], [119.47, 70.97], [119.25, 71.5], [119.35, 71.75], [119.25, 72.0], [119.47, 72.53], [120.0, 72.75], [120.53, 72.53], [120.75, 72.0], [120.65, 71.75], [120.68, 71.68], [120.75, 71.65], [121.0, 71.75], [121.25, 71.65], [121.5, 71.75], [121.75, 71.65], [122.0, 71.75], [122.53, 71.53], [122.68, 71.18], [123.03, 71.03], [123.25, 70.5], [123.15, 70.25], [123.25, 70.0], [123.15, 69.75], [123.18, 69.68], [123.25, 69.65], [123.5, 69.75], [123.75, 69.65], [123.82, 69.68], [123.97, 70.03], [124.5, 70.25], [124.75, 70.15], [125.0, 70.25], [125.25, 70.15], [125.5, 70.25], [125.75, 70.15], [126.0, 70.25], [126.53, 70.03], [126.75, 69.5], [126.65, 69.25], [126.75, 69.0], [126.53, 68.47], [126.0, 68.25], [125.75, 68.35], [125.5, 68.25], [125.25, 68.35], [125.18, 68.32], [125.03, 67.97], [124.68, 67.82], [124.53, 67.47], [124.18, 67.32], [124.15, 67.25], [124.25, 67.0], [124.15, 66.75], [124.25, 66.5], [124.15, 66.25], [124.25, 66.0], [124.13, 65.7], [124.53, 65.53], [124.75, 65.0], [124.53, 64.47], [124.0, 64.25], [123.75, 64.35], [123.5, 64.25], [123.25, 64.35], [123.0, 64.25], [122.75, 64.35], [122.68, 64.32], [122.53, 63.97], [122.0, 63.75], [121.47, 63.97], [121.32, 64.32], [120.97, 64.47], [120.82, 64.82], [120.75, 64.85], [120.5, 64.75], [120.25, 64.85], [120.0, 64.75], [119.75, 64.85], [119.5, 64.75], [118.97, 64.97], [118.75, 65.5], [118.85, 65.75], [118.75, 66.0], [118.85, 66.25]]]]}, "2016-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.85, 66.25], [118.75, 66.5], [118.97, 67.03], [119.32, 67.18], [119.47, 67.53], [119.82, 67.68], [119.97, 68.03], [120.5, 68.25], [120.8, 68.13], [120.85, 68.25], [120.75, 68.5], [120.85, 68.75], [120.82, 68.82], [120.47, 68.97], [120.25, 69.5], [120.35, 69.75], [120.25, 70.0], [120.35, 70.25], [120.32, 70.32], [119.97, 70.47], [119.82, 70.82], [119.47, 70.97], [119.25, 71.5], [119.35, 71.75], [119.25, 72.0], [119.47, 72.53], [120.0, 72.75], [120.53, 72.53], [120.75, 72.0], [120.65, 71.75], [120.68, 71.68], [120.75, 71.65], [121.0, 71.75], [121.25, 71.65], [121.5, 71.75], [121.75, 71.65], [122.0, 71.75], [122.53, 71.53], [122.68, 71.18], [123.03, 71.03], [123.25, 70.5], [123.15, 70.25], [123.25, 70.0], [123.15, 69.75], [123.18, 69.68], [123.25, 69.65], [123.5, 69.75], [123.75, 69.65], [123.82, 69.68], [123.97, 70.03], [124.5, 70.25], [124.75, 70.15], [125.0, 70.25], [125.25, 70.15], [125.5, 70.25], [125.75, 70.15], [126.0, 70.25], [126.53, 70.03], [126.75, 69.5], [126.65, 69.25], [126.75, 69.0], [126.53, 68.47], [126.0, 68.25], [125.75, 68.35], [125.5, 68.25], [125.25, 68.35], [125.18, 68.32], [125.03, 67.97], [124.68, 67.82], [124.53, 67.47], [124.18, 67.32], [124.15, 67.25], [124.25, 67.0], [124.15, 66.75], [124.25, 66.5], [124.15, 66.25], [124.25, 66.0], [124.13, 65.7], [124.53, 65.53], [124.75, 65.0], [124.53, 64.47], [124.0, 64.25], [123.75, 64.35], [123.5, 64.25], [123.25, 64.35], [123.0, 64.25], [122.75, 64.35], [122.68, 64.32], [122.53, 63.97], [122.0, 63.75], [121.47, 63.97], [121.32, 64.32], [120.97, 64.47], [120.82, 64.82], [120.75, 64.85], [120.5, 64.75], [120.25, 64.85], [120.0, 64.75], [119.75, 64.85], [119.5, 64.75], [118.97, 64.97], [118.75, 65.5], [118.85, 65.75], [118.75, 66.0], [118.85, 66.25]]]]}, "2016-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.85, 66.25], [118.75, 66.5], [118.97, 67.03], [119.32, 67.18], [119.47, 67.53], [119.82, 67.68], [119.97, 68.03], [120.5, 68.25], [120.8, 68.13], [120.85, 68.25], [120.75, 68.5], [120.85, 68.75], [120.82, 68.82], [120.47, 68.97], [120.25, 69.5], [120.35, 69.75], [120.25, 70.0], [120.35, 70.25], [120.32, 70.32], [119.97, 70.47], [119.82, 70.82], [119.47, 70.97], [119.25, 71.5], [119.35, 71.75], [119.25, 72.0], [119.47, 72.53], [120.0, 72.75], [120.53, 72.53], [120.75, 72.0], [120.65, 71.75], [120.68, 71.68], [120.75, 71.65], [121.0, 71.75], [121.25, 71.65], [121.5, 71.75], [121.75, 71.65], [122.0, 71.75], [122.53, 71.53], [122.68, 71.18], [123.03, 71.03], [123.25, 70.5], [123.15, 70.25], [123.25, 70.0], [123.15, 69.75], [123.18, 69.68], [123.25, 69.65], [123.5, 69.75], [123.75, 69.65], [123.82, 69.68], [123.97, 70.03], [124.5, 70.25], [124.75, 70.15], [125.0, 70.25], [125.25, 70.15], [125.5, 70.25], [125.75, 70.15], [126.0, 70.25], [126.53, 70.03], [126.75, 69.5], [126.65, 69.25], [126.75, 69.0], [126.53, 68.47], [126.0, 68.25], [125.75, 68.35], [125.5, 68.25], [125.25, 68.35], [125.18, 68.32], [125.03, 67.97], [124.68, 67.82], [124.53, 67.47], [124.18, 67.32], [124.15, 67.25], [124.25, 67.0], [124.15, 66.75], [124.25, 66.5], [124.15, 66.25], [124.25, 66.0], [124.13, 65.7], [124.53, 65.53], [124.75, 65.0], [124.53, 64.47], [124.0, 64.25], [123.75, 64.35], [123.5, 64.25], [123.25, 64.35], [123.0, 64.25], [122.75, 64.35], [122.68, 64.32], [122.53, 63.97], [122.0, 63.75], [121.47, 63.97], [121.32, 64.32], [120.97, 64.47], [120.82, 64.82], [120.75, 64.85], [120.5, 64.75], [120.25, 64.85], [120.0, 64.75], [119.75, 64.85], [119.5, 64.75], [118.97, 64.97], [118.75, 65.5], [118.85, 65.75], [118.75, 66.0], [118.85, 66.25]]]]}, "2016-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.75, 66.0], [118.97, 66.53], [119.5, 66.75], [119.75, 66.65], [120.0, 66.75], [120.25, 66.65], [120.5, 66.75], [120.75, 66.65], [121.0, 66.75], [121.25, 66.65], [121.5, 66.75], [122.03, 66.53], [122.25, 66.0], [122.03, 65.47], [121.5, 65.25], [121.25, 65.35], [121.0, 65.25], [120.75, 65.35], [120.5, 65.25], [120.25, 65.35], [120.0, 65.25], [119.75, 65.35], [119.5, 65.25], [118.97, 65.47], [118.75, 66.0]]], [[[119.97, 68.03], [120.5, 68.25], [121.03, 68.03], [121.25, 67.5], [121.03, 66.97], [120.5, 66.75], [119.97, 66.97], [119.75, 67.5], [119.97, 68.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -14.625730311856103}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.380462384514319}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-45.98710585268955, -46.751283883382115, -46.45038661072627, -45.28432275870864]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-49.65320109186234, -49.07178126763813, -48.299518857152066, -46.05790999712622]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-11.061185593406341, -11.79781192552839, -11.359720773369634, -10.14150545832151]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.93704280201672, -14.625730311856103, -13.261183669201955, -10.829357625998512]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4361688126238905, -1.5158874387300347, -1.4750831385326983, -1.3091935181874335]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8258432145239314, -1.9430269820421753, -1.700157368400757, -1.3656061762105016]}}