{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:12.443981", "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-Nov-28_to_2021-Dec-02_48.5_-67.5"}, "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": 2021110000828}, "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": "November 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 02 2021"}, "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": 68138.93259576868}, "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": ["Antarctica"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": ["Southern 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": -67.5}, "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": 48.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "48.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 41.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 54.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -69.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -66.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.47, -70.03], [41.25, -69.5], [41.47, -68.97], [42.0, -68.75], [42.25, -68.85], [42.32, -68.82], [42.47, -68.47], [43.0, -68.25], [43.25, -68.35], [43.5, -68.25], [43.75, -68.35], [43.82, -68.32], [43.97, -67.97], [44.32, -67.82], [44.47, -67.47], [45.0, -67.25], [45.5, -67.46], [46.0, -67.25], [46.25, -67.35], [46.5, -67.25], [46.75, -67.35], [47.0, -67.25], [47.25, -67.35], [47.32, -67.32], [47.47, -66.97], [48.0, -66.75], [48.25, -66.85], [48.5, -66.75], [48.75, -66.85], [49.0, -66.75], [49.25, -66.85], [49.5, -66.75], [49.75, -66.85], [50.0, -66.75], [50.25, -66.85], [50.5, -66.75], [50.75, -66.85], [50.82, -66.82], [50.97, -66.47], [51.5, -66.25], [52.03, -66.47], [52.18, -66.82], [52.25, -66.85], [52.32, -66.82], [52.47, -66.47], [53.0, -66.25], [53.25, -66.35], [53.5, -66.25], [53.75, -66.35], [54.0, -66.25], [54.53, -66.47], [54.75, -67.0], [54.53, -67.53], [54.18, -67.68], [54.03, -68.03], [53.5, -68.25], [53.25, -68.15], [53.0, -68.25], [52.75, -68.15], [52.5, -68.25], [52.25, -68.15], [52.18, -68.18], [52.03, -68.53], [51.5, -68.75], [51.25, -68.65], [51.18, -68.68], [51.03, -69.03], [50.5, -69.25], [50.25, -69.15], [50.0, -69.25], [49.75, -69.15], [49.5, -69.25], [49.25, -69.15], [49.0, -69.25], [48.75, -69.15], [48.5, -69.25], [48.25, -69.15], [48.0, -69.25], [47.75, -69.15], [47.5, -69.25], [47.25, -69.15], [47.0, -69.25], [46.75, -69.15], [46.5, -69.25], [46.25, -69.15], [46.18, -69.18], [46.03, -69.53], [45.5, -69.75], [45.25, -69.65], [45.0, -69.75], [44.75, -69.65], [44.5, -69.75], [44.25, -69.65], [44.0, -69.75], [43.75, -69.65], [43.5, -69.75], [43.25, -69.65], [43.18, -69.68], [43.03, -70.03], [42.5, -70.25], [42.25, -70.15], [42.0, -70.25], [41.47, -70.03]]]]}, "2021-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.47, -70.03], [41.25, -69.5], [41.47, -68.97], [42.0, -68.75], [42.25, -68.85], [42.32, -68.82], [42.35, -68.75], [42.25, -68.5], [42.47, -67.97], [43.0, -67.75], [43.25, -67.85], [43.5, -67.75], [43.75, -67.85], [43.82, -67.82], [43.97, -67.47], [44.5, -67.25], [44.75, -67.35], [45.0, -67.25], [45.25, -67.35], [45.5, -67.25], [45.75, -67.35], [46.0, -67.25], [46.25, -67.35], [46.5, -67.25], [46.75, -67.35], [47.0, -67.25], [47.25, -67.35], [47.32, -67.32], [47.47, -66.97], [48.0, -66.75], [48.25, -66.85], [48.5, -66.75], [48.75, -66.85], [49.0, -66.75], [49.25, -66.85], [49.5, -66.75], [49.75, -66.85], [49.82, -66.82], [49.97, -66.47], [50.5, -66.25], [50.75, -66.35], [51.0, -66.25], [51.25, -66.35], [51.5, -66.25], [52.03, -66.47], [52.18, -66.82], [52.25, -66.85], [52.32, -66.82], [52.47, -66.47], [53.0, -66.25], [53.25, -66.35], [53.5, -66.25], [53.75, -66.35], [54.0, -66.25], [54.53, -66.47], [54.75, -67.0], [54.53, -67.53], [54.18, -67.68], [54.03, -68.03], [53.5, -68.25], [53.25, -68.15], [53.0, -68.25], [52.75, -68.15], [52.5, -68.25], [52.25, -68.15], [52.18, -68.18], [52.03, -68.53], [51.5, -68.75], [51.25, -68.65], [51.18, -68.68], [51.03, -69.03], [50.5, -69.25], [50.25, -69.15], [50.0, -69.25], [49.75, -69.15], [49.5, -69.25], [49.25, -69.15], [49.0, -69.25], [48.75, -69.15], [48.5, -69.25], [48.25, -69.15], [48.0, -69.25], [47.75, -69.15], [47.5, -69.25], [47.25, -69.15], [47.0, -69.25], [46.75, -69.15], [46.5, -69.25], [46.25, -69.15], [46.18, -69.18], [46.03, -69.53], [45.5, -69.75], [45.25, -69.65], [45.0, -69.75], [44.75, -69.65], [44.5, -69.75], [44.25, -69.65], [44.0, -69.75], [43.75, -69.65], [43.5, -69.75], [43.25, -69.65], [43.18, -69.68], [43.03, -70.03], [42.5, -70.25], [42.25, -70.15], [42.0, -70.25], [41.47, -70.03]]]]}, "2021-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[41.47, -70.03], [41.25, -69.5], [41.47, -68.97], [42.0, -68.75], [42.25, -68.85], [42.32, -68.82], [42.35, -68.75], [42.25, -68.5], [42.47, -67.97], [43.0, -67.75], [43.25, -67.85], [43.5, -67.75], [43.75, -67.85], [43.82, -67.82], [43.97, -67.47], [44.5, -67.25], [44.75, -67.35], [45.0, -67.25], [45.25, -67.35], [45.5, -67.25], [45.75, -67.35], [45.82, -67.32], [45.97, -66.97], [46.5, -66.75], [47.03, -66.97], [47.18, -67.32], [47.25, -67.35], [47.32, -67.32], [47.47, -66.97], [48.0, -66.75], [48.25, -66.85], [48.5, -66.75], [48.75, -66.85], [49.0, -66.75], [49.25, -66.85], [49.5, -66.75], [49.75, -66.85], [49.82, -66.82], [49.97, -66.47], [50.5, -66.25], [50.75, -66.35], [51.0, -66.25], [51.25, -66.35], [51.5, -66.25], [52.0, -66.46], [52.5, -66.25], [52.75, -66.35], [53.0, -66.25], [53.25, -66.35], [53.5, -66.25], [53.75, -66.35], [54.0, -66.25], [54.53, -66.47], [54.75, -67.0], [54.53, -67.53], [54.18, -67.68], [54.03, -68.03], [53.5, -68.25], [53.25, -68.15], [53.0, -68.25], [52.75, -68.15], [52.5, -68.25], [52.25, -68.15], [52.18, -68.18], [52.03, -68.53], [51.5, -68.75], [51.25, -68.65], [51.18, -68.68], [51.03, -69.03], [50.5, -69.25], [50.25, -69.15], [50.0, -69.25], [49.75, -69.15], [49.5, -69.25], [49.25, -69.15], [49.0, -69.25], [48.75, -69.15], [48.5, -69.25], [48.25, -69.15], [48.0, -69.25], [47.75, -69.15], [47.5, -69.25], [47.25, -69.15], [47.0, -69.25], [46.75, -69.15], [46.5, -69.25], [46.25, -69.15], [46.18, -69.18], [46.03, -69.53], [45.5, -69.75], [45.25, -69.65], [45.0, -69.75], [44.75, -69.65], [44.5, -69.75], [44.25, -69.65], [44.0, -69.75], [43.75, -69.65], [43.5, -69.75], [43.25, -69.65], [43.18, -69.68], [43.03, -70.03], [42.5, -70.25], [42.25, -70.15], [42.0, -70.25], [41.47, -70.03]]]]}, "2021-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[42.47, -69.03], [42.25, -68.5], [42.47, -67.97], [43.0, -67.75], [43.25, -67.85], [43.5, -67.75], [43.75, -67.85], [43.82, -67.82], [43.97, -67.47], [44.5, -67.25], [44.75, -67.35], [45.0, -67.25], [45.25, -67.35], [45.5, -67.25], [45.75, -67.35], [45.82, -67.32], [45.97, -66.97], [46.5, -66.75], [47.03, -66.97], [47.18, -67.32], [47.25, -67.35], [47.32, -67.32], [47.47, -66.97], [48.0, -66.75], [48.25, -66.85], [48.5, -66.75], [48.75, -66.85], [49.0, -66.75], [49.25, -66.85], [49.5, -66.75], [49.8, -66.87], [49.97, -66.47], [50.5, -66.25], [50.75, -66.35], [51.0, -66.25], [51.25, -66.35], [51.5, -66.25], [52.0, -66.46], [52.5, -66.25], [52.75, -66.35], [53.0, -66.25], [53.53, -66.47], [53.75, -67.0], [53.53, -67.53], [53.0, -67.75], [52.75, -67.65], [52.5, -67.75], [52.0, -67.54], [51.5, -67.75], [51.25, -67.65], [51.0, -67.75], [50.75, -67.65], [50.5, -67.75], [50.2, -67.62], [50.03, -68.03], [49.68, -68.18], [49.53, -68.53], [49.0, -68.75], [48.75, -68.65], [48.5, -68.75], [48.25, -68.65], [48.0, -68.75], [47.75, -68.65], [47.5, -68.75], [47.25, -68.65], [47.0, -68.75], [46.75, -68.65], [46.5, -68.75], [46.25, -68.65], [46.0, -68.75], [45.75, -68.65], [45.5, -68.75], [45.25, -68.65], [45.0, -68.75], [44.75, -68.65], [44.68, -68.68], [44.53, -69.03], [44.0, -69.25], [43.75, -69.15], [43.5, -69.25], [43.25, -69.15], [43.0, -69.25], [42.47, -69.03]]]]}, "2021-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[43.97, -67.47], [44.5, -67.25], [44.75, -67.35], [45.0, -67.25], [45.53, -67.47], [45.75, -68.0], [45.53, -68.53], [45.0, -68.75], [44.75, -68.65], [44.5, -68.75], [43.97, -68.53], [43.75, -68.0], [43.97, -67.47]]], [[[48.5, -66.75], [48.75, -66.85], [49.0, -66.75], [49.53, -66.97], [49.75, -67.5], [49.53, -68.03], [49.18, -68.18], [49.03, -68.53], [48.5, -68.75], [48.25, -68.65], [48.0, -68.75], [47.47, -68.53], [47.25, -68.0], [47.35, -67.75], [47.25, -67.5], [47.47, -66.97], [48.0, -66.75], [48.25, -66.85], [48.5, -66.75]]], [[[45.75, -67.5], [45.97, -66.97], [46.5, -66.75], [47.03, -66.97], [47.25, -67.5], [47.03, -68.03], [46.5, -68.25], [45.97, -68.03], [45.75, -67.5]]], [[[49.97, -66.47], [50.5, -66.25], [50.75, -66.35], [51.0, -66.25], [51.25, -66.35], [51.5, -66.25], [52.0, -66.46], [52.5, -66.25], [53.03, -66.47], [53.25, -67.0], [53.03, -67.53], [52.5, -67.75], [52.0, -67.54], [51.5, -67.75], [51.25, -67.65], [51.0, -67.75], [50.75, -67.65], [50.5, -67.75], [49.97, -67.53], [49.75, -67.0], [49.97, -66.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.760958105670511}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.850960501307452}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-17.983399802735903, -17.844006010850023, -17.636505735084853, -13.539523649629984, -10.72584548221721]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.20813489816365, -22.795431655193767, -22.247489032651544, -17.67541829235799, -15.325026691979929]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.605268896005747, -5.0498014435241805, -5.152065196311442, -4.595347135367852, -3.9396752488164046]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.597460789268894, -6.760958105670511, -6.600824588983528, -6.334647620056444, -5.079514624629155]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7074680234943613, -1.877543043524481, -1.9310870818187538, -1.7869369351559308, -1.5943585853560338]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0395681222904813, -2.288696139136837, -2.6034299362577813, -2.591170648656069, -2.0823591671445194]}}