{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:38.892943", "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": "2017-Dec-09_to_2017-Dec-13_119.0_58.0"}, "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": 2017120000344}, "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 09 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 13 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 98454.19279434343}, "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"]}, "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": 58.0}, "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": 119.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 117.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 126.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.0, 58.75], [119.25, 58.65], [119.5, 58.75], [120.0, 58.54], [120.5, 58.75], [120.75, 58.65], [121.0, 58.75], [121.25, 58.65], [121.5, 58.75], [121.75, 58.65], [121.82, 58.68], [121.97, 59.03], [122.5, 59.25], [122.75, 59.15], [123.0, 59.25], [123.25, 59.15], [123.5, 59.25], [124.03, 59.03], [124.25, 58.5], [124.07, 58.07], [124.5, 58.25], [125.03, 58.03], [125.25, 57.5], [125.03, 56.97], [124.68, 56.82], [124.53, 56.47], [124.0, 56.25], [123.75, 56.35], [123.5, 56.25], [123.25, 56.35], [123.0, 56.25], [122.47, 56.47], [122.3, 56.88], [122.0, 56.75], [121.75, 56.85], [121.5, 56.75], [121.2, 56.88], [121.03, 56.47], [120.5, 56.25], [120.25, 56.35], [120.0, 56.25], [119.75, 56.35], [119.5, 56.25], [118.97, 56.47], [118.75, 57.0], [118.88, 57.3], [118.7, 57.38], [118.53, 56.97], [118.0, 56.75], [117.47, 56.97], [117.25, 57.5], [117.47, 58.03], [118.0, 58.25], [118.3, 58.13], [118.47, 58.53], [119.0, 58.75]], [[123.82, 57.68], [123.93, 57.93], [123.68, 57.82], [123.65, 57.75], [123.68, 57.68], [123.75, 57.65], [123.82, 57.68]]]]}, "2017-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.47, 59.03], [118.0, 59.25], [118.25, 59.15], [118.5, 59.25], [119.0, 59.04], [119.5, 59.25], [120.03, 59.03], [120.2, 58.63], [120.32, 58.68], [120.47, 59.03], [121.0, 59.25], [121.25, 59.15], [121.5, 59.25], [121.8, 59.13], [121.97, 59.53], [122.5, 59.75], [122.75, 59.65], [123.0, 59.75], [123.25, 59.65], [123.5, 59.75], [123.75, 59.65], [124.0, 59.75], [124.53, 59.53], [124.68, 59.18], [124.75, 59.15], [125.0, 59.25], [125.25, 59.15], [125.5, 59.25], [126.03, 59.03], [126.25, 58.5], [126.03, 57.97], [125.5, 57.75], [125.25, 57.85], [125.18, 57.82], [125.15, 57.75], [125.25, 57.5], [125.03, 56.97], [124.68, 56.82], [124.53, 56.47], [124.0, 56.25], [123.75, 56.35], [123.5, 56.25], [123.25, 56.35], [123.0, 56.25], [122.7, 56.38], [122.53, 55.97], [122.0, 55.75], [121.75, 55.85], [121.5, 55.75], [121.25, 55.85], [121.0, 55.75], [120.47, 55.97], [120.32, 56.32], [120.25, 56.35], [120.0, 56.25], [119.75, 56.35], [119.5, 56.25], [119.25, 56.35], [119.18, 56.32], [119.03, 55.97], [118.5, 55.75], [117.97, 55.97], [117.75, 56.5], [117.85, 56.75], [117.82, 56.82], [117.75, 56.85], [117.5, 56.75], [116.97, 56.97], [116.75, 57.5], [116.97, 58.03], [117.38, 58.2], [117.25, 58.5], [117.47, 59.03]]]]}, "2017-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.47, 59.03], [118.0, 59.25], [118.25, 59.15], [118.5, 59.25], [119.0, 59.04], [119.5, 59.25], [120.03, 59.03], [120.2, 58.63], [120.32, 58.68], [120.47, 59.03], [121.0, 59.25], [121.25, 59.15], [121.5, 59.25], [121.8, 59.13], [121.97, 59.53], [122.5, 59.75], [122.75, 59.65], [123.0, 59.75], [123.25, 59.65], [123.5, 59.75], [123.75, 59.65], [124.0, 59.75], [124.3, 59.63], [124.47, 60.03], [125.0, 60.25], [125.25, 60.15], [125.5, 60.25], [125.75, 60.15], [126.0, 60.25], [126.53, 60.03], [126.68, 59.68], [127.03, 59.53], [127.25, 59.0], [127.03, 58.47], [126.5, 58.25], [126.25, 58.35], [126.18, 58.32], [126.03, 57.97], [125.5, 57.75], [125.25, 57.85], [125.18, 57.82], [125.15, 57.75], [125.25, 57.5], [125.03, 56.97], [124.68, 56.82], [124.53, 56.47], [124.0, 56.25], [123.75, 56.35], [123.5, 56.25], [123.25, 56.35], [123.0, 56.25], [122.7, 56.38], [122.53, 55.97], [122.0, 55.75], [121.75, 55.85], [121.5, 55.75], [121.25, 55.85], [121.0, 55.75], [120.47, 55.97], [120.32, 56.32], [120.25, 56.35], [120.0, 56.25], [119.75, 56.35], [119.5, 56.25], [119.25, 56.35], [119.18, 56.32], [119.03, 55.97], [118.5, 55.75], [117.97, 55.97], [117.75, 56.5], [117.85, 56.75], [117.82, 56.82], [117.75, 56.85], [117.5, 56.75], [116.97, 56.97], [116.75, 57.5], [116.97, 58.03], [117.38, 58.2], [117.25, 58.5], [117.47, 59.03]]]]}, "2017-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.47, 59.03], [118.0, 59.25], [118.25, 59.15], [118.5, 59.25], [119.0, 59.04], [119.5, 59.25], [120.03, 59.03], [120.25, 58.5], [120.47, 59.03], [121.0, 59.25], [121.25, 59.15], [121.5, 59.25], [121.8, 59.13], [121.97, 59.53], [122.5, 59.75], [122.75, 59.65], [123.0, 59.75], [123.25, 59.65], [123.5, 59.75], [123.75, 59.65], [124.0, 59.75], [124.3, 59.63], [124.47, 60.03], [125.0, 60.25], [125.25, 60.15], [125.5, 60.25], [125.75, 60.15], [126.0, 60.25], [126.53, 60.03], [126.68, 59.68], [127.03, 59.53], [127.25, 59.0], [127.03, 58.47], [126.5, 58.25], [126.25, 58.35], [126.18, 58.32], [126.03, 57.97], [125.5, 57.75], [125.25, 57.85], [125.18, 57.82], [125.03, 57.47], [124.68, 57.32], [124.65, 57.25], [124.75, 57.0], [124.53, 56.47], [124.0, 56.25], [123.75, 56.35], [123.5, 56.25], [122.97, 56.47], [122.75, 57.0], [122.65, 56.75], [122.75, 56.5], [122.53, 55.97], [122.0, 55.75], [121.75, 55.85], [121.5, 55.75], [121.25, 55.85], [121.0, 55.75], [120.47, 55.97], [120.32, 56.32], [119.97, 56.47], [119.82, 56.82], [119.75, 56.85], [119.68, 56.82], [119.53, 56.47], [119.18, 56.32], [119.03, 55.97], [118.5, 55.75], [117.97, 55.97], [117.75, 56.5], [117.85, 56.75], [117.8, 56.88], [117.5, 56.75], [116.97, 56.97], [116.75, 57.5], [116.97, 58.03], [117.38, 58.2], [117.25, 58.5], [117.47, 59.03]], [[120.13, 58.2], [120.25, 58.15], [120.38, 58.2], [120.25, 58.5], [120.13, 58.2]], [[122.88, 57.3], [122.75, 57.35], [122.63, 57.3], [122.75, 57.0], [122.88, 57.3]], [[118.32, 57.68], [118.35, 57.75], [118.32, 57.82], [118.25, 57.85], [118.13, 57.8], [118.2, 57.63], [118.32, 57.68]]]]}, "2017-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.47, 57.53], [121.0, 57.75], [121.25, 57.65], [121.5, 57.75], [121.75, 57.65], [122.0, 57.75], [122.53, 57.53], [122.75, 57.0], [122.65, 56.75], [122.75, 56.5], [122.53, 55.97], [122.0, 55.75], [121.75, 55.85], [121.5, 55.75], [120.97, 55.97], [120.82, 56.32], [120.47, 56.47], [120.25, 57.0], [120.47, 57.53]]], [[[123.5, 58.75], [124.03, 58.53], [124.18, 58.18], [124.53, 58.03], [124.75, 57.5], [124.53, 56.97], [124.0, 56.75], [123.47, 56.97], [123.32, 57.32], [122.97, 57.47], [122.75, 58.0], [122.97, 58.53], [123.5, 58.75]]], [[[125.25, 60.15], [125.5, 60.25], [125.75, 60.15], [126.0, 60.25], [126.53, 60.03], [126.68, 59.68], [127.03, 59.53], [127.25, 59.0], [127.03, 58.47], [126.5, 58.25], [126.25, 58.35], [126.0, 58.25], [125.75, 58.35], [125.5, 58.25], [125.25, 58.35], [125.0, 58.25], [124.47, 58.47], [124.25, 59.0], [124.35, 59.25], [124.25, 59.5], [124.47, 60.03], [125.0, 60.25], [125.25, 60.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -17.700546998323148}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.016081975791039}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-37.97748781793857, -39.51637764310573, -40.720102392106156, -40.64017272290181, -41.46613308374688]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-39.16461725207475, -42.42615764336702, -45.68612497605125, -45.14853219677886, -45.25969500507506]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.59850163959286, -10.618592494668682, -11.685338216846029, -11.309817602602147, -11.096647807563864]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.484694247260961, -14.067833892771489, -17.700546998323148, -16.300915374336853, -15.608839019006439]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5022414066516507, -1.5891235287012546, -1.6481257796278637, -1.584306110049146, -1.543168630509504]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8956120973976145, -2.012207115432152, -2.092794193248178, -2.0657849941794373, -1.8561391787689328]}}