{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:58.701406", "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": "2021-Aug-26_to_2021-Aug-28_199.0_63.5"}, "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": 2021080001034}, "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 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 28 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 61769.286408258}, "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.W.North-America"]}, "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": ["Bering 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": 63.5}, "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": 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": 196.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 200.75}, "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": 64.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.65, 62.75], [-163.75, 63.0], [-163.53, 63.53], [-163.0, 63.75], [-162.75, 63.65], [-162.68, 63.68], [-162.53, 64.03], [-162.0, 64.25], [-161.75, 64.15], [-161.68, 64.18], [-161.53, 64.53], [-161.0, 64.75], [-160.75, 64.65], [-160.68, 64.68], [-160.53, 65.03], [-160.0, 65.25], [-159.75, 65.15], [-159.5, 65.25], [-158.97, 65.03], [-158.75, 64.5], [-158.97, 63.97], [-159.37, 63.8], [-159.25, 63.5], [-159.35, 63.25], [-159.25, 63.0], [-159.47, 62.47], [-159.82, 62.32], [-159.85, 62.25], [-159.82, 62.18], [-159.47, 62.03], [-159.25, 61.5], [-159.35, 61.25], [-159.25, 61.0], [-159.47, 60.47], [-159.82, 60.32], [-159.97, 59.97], [-160.5, 59.75], [-160.75, 59.85], [-161.0, 59.75], [-161.25, 59.85], [-161.5, 59.75], [-162.03, 59.97], [-162.18, 60.32], [-162.25, 60.35], [-162.5, 60.25], [-163.03, 60.47], [-163.25, 61.0], [-163.15, 61.25], [-163.18, 61.32], [-163.53, 61.47], [-163.75, 62.0], [-163.65, 62.25], [-163.75, 62.5], [-163.65, 62.75]]]]}, "2021-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.65, 62.75], [-163.75, 63.0], [-163.53, 63.53], [-163.0, 63.75], [-162.75, 63.65], [-162.68, 63.68], [-162.53, 64.03], [-162.0, 64.25], [-161.75, 64.15], [-161.68, 64.18], [-161.53, 64.53], [-161.0, 64.75], [-160.75, 64.65], [-160.68, 64.68], [-160.53, 65.03], [-160.0, 65.25], [-159.75, 65.15], [-159.5, 65.25], [-158.97, 65.03], [-158.75, 64.5], [-158.97, 63.97], [-159.37, 63.8], [-159.25, 63.5], [-159.35, 63.25], [-159.25, 63.0], [-159.47, 62.47], [-159.82, 62.32], [-159.85, 62.25], [-159.82, 62.18], [-159.47, 62.03], [-159.25, 61.5], [-159.35, 61.25], [-159.25, 61.0], [-159.47, 60.47], [-159.82, 60.32], [-159.97, 59.97], [-160.5, 59.75], [-160.75, 59.85], [-161.0, 59.75], [-161.25, 59.85], [-161.5, 59.75], [-162.03, 59.97], [-162.18, 60.32], [-162.25, 60.35], [-162.5, 60.25], [-163.03, 60.47], [-163.25, 61.0], [-163.15, 61.25], [-163.18, 61.32], [-163.53, 61.47], [-163.75, 62.0], [-163.65, 62.25], [-163.75, 62.5], [-163.65, 62.75]]]]}, "2021-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-163.65, 62.75], [-163.75, 63.0], [-163.53, 63.53], [-163.0, 63.75], [-162.75, 63.65], [-162.68, 63.68], [-162.53, 64.03], [-162.0, 64.25], [-161.75, 64.15], [-161.68, 64.18], [-161.53, 64.53], [-161.0, 64.75], [-160.75, 64.65], [-160.68, 64.68], [-160.53, 65.03], [-160.0, 65.25], [-159.75, 65.15], [-159.5, 65.25], [-158.97, 65.03], [-158.75, 64.5], [-158.97, 63.97], [-159.37, 63.8], [-159.25, 63.5], [-159.35, 63.25], [-159.25, 63.0], [-159.47, 62.47], [-159.82, 62.32], [-159.85, 62.25], [-159.82, 62.18], [-159.47, 62.03], [-159.25, 61.5], [-159.35, 61.25], [-159.25, 61.0], [-159.47, 60.47], [-159.82, 60.32], [-159.97, 59.97], [-160.5, 59.75], [-160.75, 59.85], [-161.0, 59.75], [-161.25, 59.85], [-161.5, 59.75], [-162.03, 59.97], [-162.18, 60.32], [-162.25, 60.35], [-162.5, 60.25], [-163.03, 60.47], [-163.25, 61.0], [-163.15, 61.25], [-163.18, 61.32], [-163.53, 61.47], [-163.75, 62.0], [-163.65, 62.25], [-163.75, 62.5], [-163.65, 62.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.243384085831337}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.7461064714467898}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.057289558740763, 6.128238821046807, 5.777689196735821]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.5377987913308857, 1.0115397114654456, 2.0745877402593464]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.15134561924878, -3.9359435626306323, -4.151030232460958]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.083109196999885, -6.243384085831337, -4.983871950803405]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3635571155962247, -1.7416184407454252, -1.8863384624202992]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.56262700496866, -2.220379740166355, -2.179884673654642]}}