{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:11.709725", "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-23_to_2021-Nov-25_123.0_-66.5"}, "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": 2021110000708}, "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 23 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 25 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": 86769.42288385297}, "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": -66.5}, "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": 123.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "123.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 113.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 128.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -67.25}, "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": {"2021-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.47, -66.53], [113.25, -66.0], [113.47, -65.47], [114.0, -65.25], [114.25, -65.35], [114.5, -65.25], [115.03, -65.47], [115.18, -65.82], [115.25, -65.85], [115.5, -65.75], [116.0, -65.96], [116.5, -65.75], [117.0, -65.96], [117.5, -65.75], [117.75, -65.85], [117.82, -65.82], [117.97, -65.47], [118.5, -65.25], [118.75, -65.35], [119.0, -65.25], [119.25, -65.35], [119.5, -65.25], [119.75, -65.35], [120.0, -65.25], [120.25, -65.35], [120.5, -65.25], [120.75, -65.35], [120.82, -65.32], [120.97, -64.97], [121.32, -64.82], [121.47, -64.47], [122.0, -64.25], [122.25, -64.35], [122.5, -64.25], [122.75, -64.35], [123.0, -64.25], [123.25, -64.35], [123.5, -64.25], [123.75, -64.35], [124.0, -64.25], [124.25, -64.35], [124.5, -64.25], [125.03, -64.47], [125.25, -65.0], [125.03, -65.53], [124.63, -65.7], [124.68, -65.82], [124.75, -65.85], [125.0, -65.75], [125.25, -65.85], [125.32, -65.82], [125.47, -65.47], [126.0, -65.25], [126.25, -65.35], [126.5, -65.25], [127.03, -65.47], [127.18, -65.82], [127.25, -65.85], [127.5, -65.75], [127.75, -65.85], [128.0, -65.75], [128.53, -65.97], [128.68, -66.32], [129.03, -66.47], [129.25, -67.0], [129.03, -67.53], [128.5, -67.75], [128.25, -67.65], [128.0, -67.75], [127.75, -67.65], [127.5, -67.75], [126.97, -67.53], [126.82, -67.18], [126.75, -67.15], [126.5, -67.25], [126.25, -67.15], [126.0, -67.25], [125.75, -67.15], [125.5, -67.25], [125.25, -67.15], [125.0, -67.25], [124.75, -67.15], [124.5, -67.25], [124.25, -67.15], [124.0, -67.25], [123.75, -67.15], [123.68, -67.18], [123.53, -67.53], [123.0, -67.75], [122.75, -67.65], [122.5, -67.75], [122.25, -67.65], [122.0, -67.75], [121.75, -67.65], [121.5, -67.75], [121.25, -67.65], [121.0, -67.75], [120.75, -67.65], [120.5, -67.75], [120.25, -67.65], [120.0, -67.75], [119.75, -67.65], [119.5, -67.75], [119.25, -67.65], [119.0, -67.75], [118.75, -67.65], [118.5, -67.75], [118.25, -67.65], [118.0, -67.75], [117.75, -67.65], [117.5, -67.75], [117.25, -67.65], [117.0, -67.75], [116.75, -67.65], [116.5, -67.75], [116.25, -67.65], [116.0, -67.75], [115.75, -67.65], [115.5, -67.75], [115.25, -67.65], [115.0, -67.75], [114.47, -67.53], [114.25, -67.0], [114.35, -66.75], [114.32, -66.68], [114.25, -66.65], [114.0, -66.75], [113.47, -66.53]]]]}, "2021-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.47, -66.53], [113.25, -66.0], [113.47, -65.47], [114.0, -65.25], [114.25, -65.35], [114.5, -65.25], [115.03, -65.47], [115.18, -65.82], [115.25, -65.85], [115.5, -65.75], [116.0, -65.96], [116.5, -65.75], [117.0, -65.96], [117.5, -65.75], [117.75, -65.85], [117.82, -65.82], [117.97, -65.47], [118.5, -65.25], [118.75, -65.35], [119.0, -65.25], [119.25, -65.35], [119.5, -65.25], [119.75, -65.35], [120.0, -65.25], [120.25, -65.35], [120.5, -65.25], [120.75, -65.35], [120.82, -65.32], [120.97, -64.97], [121.32, -64.82], [121.47, -64.47], [122.0, -64.25], [122.25, -64.35], [122.5, -64.25], [122.75, -64.35], [123.0, -64.25], [123.25, -64.35], [123.5, -64.25], [123.75, -64.35], [124.0, -64.25], [124.25, -64.35], [124.5, -64.25], [125.03, -64.47], [125.25, -65.0], [125.03, -65.53], [124.63, -65.7], [124.68, -65.82], [124.75, -65.85], [125.0, -65.75], [125.25, -65.85], [125.32, -65.82], [125.47, -65.47], [126.0, -65.25], [126.25, -65.35], [126.5, -65.25], [127.03, -65.47], [127.18, -65.82], [127.25, -65.85], [127.5, -65.75], [127.75, -65.85], [128.0, -65.75], [128.53, -65.97], [128.68, -66.32], [129.03, -66.47], [129.25, -67.0], [129.03, -67.53], [128.5, -67.75], [128.25, -67.65], [128.0, -67.75], [127.75, -67.65], [127.5, -67.75], [126.97, -67.53], [126.82, -67.18], [126.75, -67.15], [126.5, -67.25], [126.25, -67.15], [126.0, -67.25], [125.75, -67.15], [125.5, -67.25], [125.25, -67.15], [125.0, -67.25], [124.75, -67.15], [124.5, -67.25], [124.25, -67.15], [124.0, -67.25], [123.75, -67.15], [123.68, -67.18], [123.53, -67.53], [123.0, -67.75], [122.75, -67.65], [122.5, -67.75], [122.25, -67.65], [122.0, -67.75], [121.75, -67.65], [121.5, -67.75], [121.25, -67.65], [121.0, -67.75], [120.75, -67.65], [120.5, -67.75], [120.25, -67.65], [120.0, -67.75], [119.75, -67.65], [119.5, -67.75], [119.25, -67.65], [119.0, -67.75], [118.75, -67.65], [118.5, -67.75], [118.25, -67.65], [118.0, -67.75], [117.75, -67.65], [117.5, -67.75], [117.25, -67.65], [117.0, -67.75], [116.75, -67.65], [116.5, -67.75], [116.25, -67.65], [116.0, -67.75], [115.75, -67.65], [115.5, -67.75], [115.25, -67.65], [115.0, -67.75], [114.47, -67.53], [114.25, -67.0], [114.35, -66.75], [114.32, -66.68], [114.25, -66.65], [114.0, -66.75], [113.47, -66.53]]]]}, "2021-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.47, -66.53], [113.25, -66.0], [113.47, -65.47], [114.0, -65.25], [114.25, -65.35], [114.5, -65.25], [115.03, -65.47], [115.18, -65.82], [115.25, -65.85], [115.5, -65.75], [116.0, -65.96], [116.5, -65.75], [117.0, -65.96], [117.5, -65.75], [117.75, -65.85], [117.82, -65.82], [117.97, -65.47], [118.5, -65.25], [118.75, -65.35], [119.0, -65.25], [119.25, -65.35], [119.5, -65.25], [119.75, -65.35], [120.0, -65.25], [120.25, -65.35], [120.5, -65.25], [120.75, -65.35], [120.82, -65.32], [120.97, -64.97], [121.32, -64.82], [121.47, -64.47], [122.0, -64.25], [122.25, -64.35], [122.5, -64.25], [122.75, -64.35], [123.0, -64.25], [123.25, -64.35], [123.5, -64.25], [123.75, -64.35], [124.0, -64.25], [124.25, -64.35], [124.5, -64.25], [125.03, -64.47], [125.25, -65.0], [125.03, -65.53], [124.63, -65.7], [124.68, -65.82], [124.75, -65.85], [125.0, -65.75], [125.25, -65.85], [125.32, -65.82], [125.47, -65.47], [126.0, -65.25], [126.25, -65.35], [126.5, -65.25], [127.03, -65.47], [127.18, -65.82], [127.25, -65.85], [127.5, -65.75], [127.75, -65.85], [128.0, -65.75], [128.53, -65.97], [128.68, -66.32], [129.03, -66.47], [129.25, -67.0], [129.03, -67.53], [128.5, -67.75], [128.25, -67.65], [128.0, -67.75], [127.75, -67.65], [127.5, -67.75], [126.97, -67.53], [126.82, -67.18], [126.75, -67.15], [126.5, -67.25], [126.25, -67.15], [126.0, -67.25], [125.75, -67.15], [125.5, -67.25], [125.25, -67.15], [125.0, -67.25], [124.75, -67.15], [124.5, -67.25], [124.25, -67.15], [124.0, -67.25], [123.75, -67.15], [123.68, -67.18], [123.53, -67.53], [123.0, -67.75], [122.75, -67.65], [122.5, -67.75], [122.25, -67.65], [122.0, -67.75], [121.75, -67.65], [121.5, -67.75], [121.25, -67.65], [121.0, -67.75], [120.75, -67.65], [120.5, -67.75], [120.25, -67.65], [120.0, -67.75], [119.75, -67.65], [119.5, -67.75], [119.25, -67.65], [119.0, -67.75], [118.75, -67.65], [118.5, -67.75], [118.25, -67.65], [118.0, -67.75], [117.75, -67.65], [117.5, -67.75], [117.25, -67.65], [117.0, -67.75], [116.75, -67.65], [116.5, -67.75], [116.25, -67.65], [116.0, -67.75], [115.75, -67.65], [115.5, -67.75], [115.25, -67.65], [115.0, -67.75], [114.47, -67.53], [114.25, -67.0], [114.35, -66.75], [114.32, -66.68], [114.25, -66.65], [114.0, -66.75], [113.47, -66.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.807952883000269}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9868864503579537}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.572541527782334, -9.949767647998726, -9.107667132475456]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-13.581755760541796, -14.58644658898487, -13.495024049395795]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8689866733737523, -4.381204329105042, -3.710468348595061]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.457534503664931, -6.807952883000269, -5.526031755763711]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7374329273281057, -1.9558882260770247, -1.685077520231932]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.147333007715141, -2.3655030494695155, -2.1189160819617943]}}