{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:08.894802", "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-Oct-24_to_2017-Oct-27_199.0_22.0"}, "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": 2017100000689}, "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": "October 24 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 27 2017"}, "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": 305660.1568394905}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Pacific-Ocean"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North America"]}, "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": ["North Pacific Ocean"]}, "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": 22.0}, "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": 199.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "199.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 188.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 202.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 19.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 23.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-171.53, 21.53], [-171.0, 21.75], [-170.75, 21.65], [-170.5, 21.75], [-170.25, 21.65], [-170.18, 21.68], [-170.03, 22.03], [-169.5, 22.25], [-169.25, 22.15], [-169.0, 22.25], [-168.75, 22.15], [-168.68, 22.18], [-168.53, 22.53], [-168.0, 22.75], [-167.75, 22.65], [-167.5, 22.75], [-167.25, 22.65], [-167.0, 22.75], [-166.75, 22.65], [-166.68, 22.68], [-166.53, 23.03], [-166.0, 23.25], [-165.47, 23.03], [-165.32, 22.68], [-165.25, 22.65], [-165.0, 22.75], [-164.75, 22.65], [-164.5, 22.75], [-164.25, 22.65], [-164.18, 22.68], [-164.03, 23.03], [-163.5, 23.25], [-163.25, 23.15], [-163.18, 23.18], [-163.03, 23.53], [-162.5, 23.75], [-161.97, 23.53], [-161.82, 23.18], [-161.47, 23.03], [-161.32, 22.68], [-161.25, 22.65], [-161.0, 22.75], [-160.75, 22.65], [-160.5, 22.75], [-160.25, 22.65], [-160.0, 22.75], [-159.75, 22.65], [-159.5, 22.75], [-158.97, 22.53], [-158.82, 22.18], [-158.75, 22.15], [-158.5, 22.25], [-158.25, 22.15], [-158.0, 22.25], [-157.75, 22.15], [-157.5, 22.25], [-156.97, 22.03], [-156.75, 21.5], [-156.85, 21.25], [-156.75, 21.0], [-156.97, 20.47], [-157.5, 20.25], [-157.75, 20.35], [-158.0, 20.25], [-158.25, 20.35], [-158.5, 20.25], [-159.03, 20.47], [-159.18, 20.82], [-159.53, 20.97], [-159.68, 21.32], [-159.75, 21.35], [-159.82, 21.32], [-159.97, 20.97], [-160.5, 20.75], [-160.75, 20.85], [-160.82, 20.82], [-160.85, 20.75], [-160.75, 20.5], [-160.97, 19.97], [-161.5, 19.75], [-161.75, 19.85], [-161.82, 19.82], [-161.97, 19.47], [-162.5, 19.25], [-162.75, 19.35], [-163.0, 19.25], [-163.25, 19.35], [-163.32, 19.32], [-163.47, 18.97], [-164.0, 18.75], [-164.5, 18.96], [-165.0, 18.75], [-165.25, 18.85], [-165.5, 18.75], [-166.03, 18.97], [-166.18, 19.32], [-166.25, 19.35], [-166.5, 19.25], [-166.75, 19.35], [-167.0, 19.25], [-167.25, 19.35], [-167.5, 19.25], [-167.75, 19.35], [-168.0, 19.25], [-168.25, 19.35], [-168.5, 19.25], [-168.75, 19.35], [-169.0, 19.25], [-169.53, 19.47], [-169.68, 19.82], [-169.75, 19.85], [-170.0, 19.75], [-170.25, 19.85], [-170.5, 19.75], [-170.75, 19.85], [-171.0, 19.75], [-171.53, 19.97], [-171.75, 20.5], [-171.65, 20.75], [-171.75, 21.0], [-171.53, 21.53]]]]}, "2017-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-171.53, 21.53], [-171.0, 21.75], [-170.75, 21.65], [-170.5, 21.75], [-170.25, 21.65], [-170.18, 21.68], [-170.03, 22.03], [-169.5, 22.25], [-169.25, 22.15], [-169.0, 22.25], [-168.75, 22.15], [-168.68, 22.18], [-168.53, 22.53], [-168.0, 22.75], [-167.75, 22.65], [-167.5, 22.75], [-167.25, 22.65], [-167.0, 22.75], [-166.75, 22.65], [-166.68, 22.68], [-166.53, 23.03], [-166.0, 23.25], [-165.47, 23.03], [-165.32, 22.68], [-165.25, 22.65], [-165.0, 22.75], [-164.75, 22.65], [-164.5, 22.75], [-164.25, 22.65], [-164.18, 22.68], [-164.03, 23.03], [-163.5, 23.25], [-163.25, 23.15], [-163.18, 23.18], [-163.03, 23.53], [-162.5, 23.75], [-161.97, 23.53], [-161.82, 23.18], [-161.47, 23.03], [-161.32, 22.68], [-161.25, 22.65], [-161.0, 22.75], [-160.75, 22.65], [-160.5, 22.75], [-160.25, 22.65], [-160.0, 22.75], [-159.75, 22.65], [-159.5, 22.75], [-158.97, 22.53], [-158.82, 22.18], [-158.75, 22.15], [-158.5, 22.25], [-158.25, 22.15], [-158.0, 22.25], [-157.75, 22.15], [-157.5, 22.25], [-156.97, 22.03], [-156.75, 21.5], [-156.85, 21.25], [-156.75, 21.0], [-156.97, 20.47], [-157.5, 20.25], [-157.75, 20.35], [-158.0, 20.25], [-158.25, 20.35], [-158.5, 20.25], [-159.03, 20.47], [-159.18, 20.82], [-159.53, 20.97], [-159.68, 21.32], [-159.75, 21.35], [-159.82, 21.32], [-159.97, 20.97], [-160.5, 20.75], [-160.75, 20.85], [-160.82, 20.82], [-160.85, 20.75], [-160.75, 20.5], [-160.97, 19.97], [-161.5, 19.75], [-161.75, 19.85], [-161.82, 19.82], [-161.97, 19.47], [-162.5, 19.25], [-162.75, 19.35], [-163.0, 19.25], [-163.25, 19.35], [-163.32, 19.32], [-163.47, 18.97], [-164.0, 18.75], [-164.5, 18.96], [-165.0, 18.75], [-165.25, 18.85], [-165.5, 18.75], [-166.03, 18.97], [-166.18, 19.32], [-166.25, 19.35], [-166.5, 19.25], [-166.75, 19.35], [-167.0, 19.25], [-167.25, 19.35], [-167.5, 19.25], [-167.75, 19.35], [-168.0, 19.25], [-168.25, 19.35], [-168.5, 19.25], [-168.75, 19.35], [-169.0, 19.25], [-169.53, 19.47], [-169.68, 19.82], [-169.75, 19.85], [-170.0, 19.75], [-170.25, 19.85], [-170.5, 19.75], [-170.75, 19.85], [-171.0, 19.75], [-171.53, 19.97], [-171.75, 20.5], [-171.65, 20.75], [-171.75, 21.0], [-171.53, 21.53]]]]}, "2017-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-171.53, 21.53], [-171.0, 21.75], [-170.75, 21.65], [-170.5, 21.75], [-170.25, 21.65], [-170.18, 21.68], [-170.03, 22.03], [-169.5, 22.25], [-169.25, 22.15], [-169.0, 22.25], [-168.75, 22.15], [-168.68, 22.18], [-168.53, 22.53], [-168.0, 22.75], [-167.75, 22.65], [-167.5, 22.75], [-167.25, 22.65], [-167.0, 22.75], [-166.75, 22.65], [-166.68, 22.68], [-166.53, 23.03], [-166.0, 23.25], [-165.47, 23.03], [-165.32, 22.68], [-165.25, 22.65], [-165.0, 22.75], [-164.75, 22.65], [-164.5, 22.75], [-164.25, 22.65], [-164.18, 22.68], [-164.03, 23.03], [-163.5, 23.25], [-163.25, 23.15], [-163.18, 23.18], [-163.03, 23.53], [-162.5, 23.75], [-161.97, 23.53], [-161.82, 23.18], [-161.47, 23.03], [-161.32, 22.68], [-161.25, 22.65], [-161.0, 22.75], [-160.75, 22.65], [-160.5, 22.75], [-160.25, 22.65], [-160.0, 22.75], [-159.75, 22.65], [-159.5, 22.75], [-158.97, 22.53], [-158.82, 22.18], [-158.75, 22.15], [-158.5, 22.25], [-158.25, 22.15], [-158.0, 22.25], [-157.75, 22.15], [-157.5, 22.25], [-156.97, 22.03], [-156.75, 21.5], [-156.85, 21.25], [-156.75, 21.0], [-156.97, 20.47], [-157.5, 20.25], [-157.75, 20.35], [-158.0, 20.25], [-158.25, 20.35], [-158.5, 20.25], [-159.03, 20.47], [-159.18, 20.82], [-159.53, 20.97], [-159.68, 21.32], [-159.75, 21.35], [-159.82, 21.32], [-159.97, 20.97], [-160.5, 20.75], [-160.75, 20.85], [-160.82, 20.82], [-160.85, 20.75], [-160.75, 20.5], [-160.97, 19.97], [-161.5, 19.75], [-161.75, 19.85], [-161.82, 19.82], [-161.97, 19.47], [-162.5, 19.25], [-162.75, 19.35], [-163.0, 19.25], [-163.25, 19.35], [-163.32, 19.32], [-163.47, 18.97], [-164.0, 18.75], [-164.5, 18.96], [-165.0, 18.75], [-165.25, 18.85], [-165.5, 18.75], [-166.03, 18.97], [-166.18, 19.32], [-166.25, 19.35], [-166.5, 19.25], [-166.75, 19.35], [-167.0, 19.25], [-167.25, 19.35], [-167.5, 19.25], [-167.75, 19.35], [-168.0, 19.25], [-168.25, 19.35], [-168.5, 19.25], [-168.75, 19.35], [-169.0, 19.25], [-169.53, 19.47], [-169.68, 19.82], [-169.75, 19.85], [-170.0, 19.75], [-170.25, 19.85], [-170.5, 19.75], [-170.75, 19.85], [-171.0, 19.75], [-171.53, 19.97], [-171.75, 20.5], [-171.65, 20.75], [-171.75, 21.0], [-171.53, 21.53]]]]}, "2017-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-161.0, 22.75], [-160.47, 22.53], [-160.25, 22.0], [-160.47, 21.47], [-161.0, 21.25], [-161.53, 21.47], [-161.75, 22.0], [-161.53, 22.53], [-161.0, 22.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.37820175722959}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.2789588390248265}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.412963844787328, 24.12755994985224, 24.619196168505937, 24.375351915521662]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.59143108283928, 21.794793062255337, 22.14244775990238, 24.375351915521662]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.3141641390786742, -1.5430591065898114, -0.9832760811150922, -0.8949410098604176]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0567037673633877, -2.37820175722959, -1.878928176624811, -0.8949410098604176]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.097316265186459, -2.448754738531182, -1.5456556569850255, -1.3036196628692758]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.933530300855289, -3.2853655875133, -2.1943036382259145, -1.3036196628692758]}}