{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:46.309463", "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": "2023-Jun-15_to_2023-Jun-21_128.0_-66.0"}, "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": 2023060000523}, "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": "June 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 21 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 60071.33314672114}, "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"]}, "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": -66.0}, "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": 128.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "128.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 123.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -66.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -64.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[128.25, -67.15], [128.0, -67.25], [127.75, -67.15], [127.5, -67.25], [126.97, -67.03], [126.82, -66.68], [126.75, -66.65], [126.5, -66.75], [126.25, -66.65], [126.0, -66.75], [125.75, -66.65], [125.5, -66.75], [125.25, -66.65], [125.0, -66.75], [124.75, -66.65], [124.68, -66.68], [124.53, -67.03], [124.0, -67.25], [123.75, -67.15], [123.5, -67.25], [122.97, -67.03], [122.75, -66.5], [122.85, -66.25], [122.75, -66.0], [122.97, -65.47], [123.5, -65.25], [123.75, -65.35], [123.82, -65.32], [123.96, -65.0], [123.75, -64.5], [123.97, -63.97], [124.5, -63.75], [124.75, -63.85], [125.0, -63.75], [125.25, -63.85], [125.5, -63.75], [125.75, -63.85], [126.0, -63.75], [126.25, -63.85], [126.5, -63.75], [126.75, -63.85], [127.0, -63.75], [127.25, -63.85], [127.5, -63.75], [128.03, -63.97], [128.18, -64.32], [128.53, -64.47], [128.68, -64.82], [128.75, -64.85], [129.0, -64.75], [129.25, -64.85], [129.5, -64.75], [129.75, -64.85], [130.0, -64.75], [130.53, -64.97], [130.75, -65.5], [130.65, -65.75], [130.75, -66.0], [130.53, -66.53], [130.18, -66.68], [130.03, -67.03], [129.5, -67.25], [129.25, -67.15], [129.0, -67.25], [128.75, -67.15], [128.5, -67.25], [128.25, -67.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica", "Southern-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-06-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, -64.97], [127.0, -64.75], [127.25, -64.85], [127.5, -64.75], [128.03, -64.97], [128.18, -65.32], [128.25, -65.35], [128.5, -65.25], [128.75, -65.35], [129.0, -65.25], [129.25, -65.35], [129.5, -65.25], [130.03, -65.47], [130.25, -66.0], [130.03, -66.53], [129.68, -66.68], [129.53, -67.03], [129.0, -67.25], [128.75, -67.15], [128.5, -67.25], [128.25, -67.15], [128.0, -67.25], [127.47, -67.03], [127.32, -66.68], [127.25, -66.65], [127.0, -66.75], [126.75, -66.65], [126.5, -66.75], [125.97, -66.53], [125.75, -66.0], [125.97, -65.47], [126.32, -65.32], [126.47, -64.97]]]]}, "2023-06-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.97, -65.03], [123.75, -64.5], [123.97, -63.97], [124.5, -63.75], [124.75, -63.85], [125.0, -63.75], [125.25, -63.85], [125.5, -63.75], [125.75, -63.85], [126.0, -63.75], [126.25, -63.85], [126.5, -63.75], [127.03, -63.97], [127.18, -64.32], [127.53, -64.47], [127.68, -64.82], [128.03, -64.97], [128.18, -65.32], [128.25, -65.35], [128.5, -65.25], [128.75, -65.35], [129.0, -65.25], [129.25, -65.35], [129.5, -65.25], [130.03, -65.47], [130.25, -66.0], [130.03, -66.53], [129.68, -66.68], [129.53, -67.03], [129.0, -67.25], [128.75, -67.15], [128.5, -67.25], [128.25, -67.15], [128.0, -67.25], [127.75, -67.15], [127.5, -67.25], [126.97, -67.03], [126.82, -66.68], [126.75, -66.65], [126.5, -66.75], [125.97, -66.53], [125.82, -66.18], [125.47, -66.03], [125.32, -65.68], [125.25, -65.65], [125.0, -65.75], [124.47, -65.53], [124.32, -65.18], [123.97, -65.03]]]]}, "2023-06-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[122.75, -66.0], [122.97, -65.47], [123.5, -65.25], [123.75, -65.35], [123.82, -65.32], [123.96, -65.0], [123.75, -64.5], [123.97, -63.97], [124.5, -63.75], [124.75, -63.85], [125.0, -63.75], [125.25, -63.85], [125.5, -63.75], [125.75, -63.85], [126.0, -63.75], [126.25, -63.85], [126.5, -63.75], [126.75, -63.85], [127.0, -63.75], [127.25, -63.85], [127.5, -63.75], [128.03, -63.97], [128.18, -64.32], [128.53, -64.47], [128.68, -64.82], [128.75, -64.85], [129.0, -64.75], [129.25, -64.85], [129.5, -64.75], [129.75, -64.85], [130.0, -64.75], [130.53, -64.97], [130.75, -65.5], [130.65, -65.75], [130.75, -66.0], [130.53, -66.53], [130.18, -66.68], [130.03, -67.03], [129.5, -67.25], [129.25, -67.15], [129.0, -67.25], [128.75, -67.15], [128.5, -67.25], [128.25, -67.15], [128.0, -67.25], [127.75, -67.15], [127.5, -67.25], [126.97, -67.03], [126.82, -66.68], [126.75, -66.65], [126.5, -66.75], [126.25, -66.65], [126.0, -66.75], [125.75, -66.65], [125.5, -66.75], [125.25, -66.65], [125.0, -66.75], [124.75, -66.65], [124.68, -66.68], [124.53, -67.03], [124.0, -67.25], [123.75, -67.15], [123.5, -67.25], [122.97, -67.03], [122.75, -66.5], [122.85, -66.25], [122.75, -66.0]]]]}, "2023-06-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[122.75, -66.0], [122.97, -65.47], [123.5, -65.25], [123.75, -65.35], [123.82, -65.32], [123.96, -65.0], [123.75, -64.5], [123.97, -63.97], [124.5, -63.75], [124.75, -63.85], [125.0, -63.75], [125.25, -63.85], [125.5, -63.75], [125.75, -63.85], [126.0, -63.75], [126.25, -63.85], [126.5, -63.75], [126.75, -63.85], [127.0, -63.75], [127.25, -63.85], [127.5, -63.75], [128.03, -63.97], [128.18, -64.32], [128.53, -64.47], [128.68, -64.82], [128.75, -64.85], [129.0, -64.75], [129.25, -64.85], [129.5, -64.75], [129.75, -64.85], [130.0, -64.75], [130.53, -64.97], [130.75, -65.5], [130.65, -65.75], [130.75, -66.0], [130.53, -66.53], [130.18, -66.68], [130.03, -67.03], [129.5, -67.25], [129.25, -67.15], [129.0, -67.25], [128.75, -67.15], [128.5, -67.25], [128.25, -67.15], [128.0, -67.25], [127.75, -67.15], [127.5, -67.25], [126.97, -67.03], [126.82, -66.68], [126.75, -66.65], [126.5, -66.75], [126.25, -66.65], [126.0, -66.75], [125.75, -66.65], [125.5, -66.75], [125.25, -66.65], [125.0, -66.75], [124.75, -66.65], [124.68, -66.68], [124.53, -67.03], [124.0, -67.25], [123.75, -67.15], [123.5, -67.25], [122.97, -67.03], [122.75, -66.5], [122.85, -66.25], [122.75, -66.0]]]]}, "2023-06-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[122.75, -66.0], [122.97, -65.47], [123.5, -65.25], [123.75, -65.35], [123.82, -65.32], [123.97, -64.97], [124.32, -64.82], [124.47, -64.47], [125.0, -64.25], [125.25, -64.35], [125.32, -64.32], [125.47, -63.97], [126.0, -63.75], [126.25, -63.85], [126.5, -63.75], [126.75, -63.85], [127.0, -63.75], [127.25, -63.85], [127.5, -63.75], [128.03, -63.97], [128.18, -64.32], [128.53, -64.47], [128.68, -64.82], [128.75, -64.85], [129.0, -64.75], [129.25, -64.85], [129.5, -64.75], [129.75, -64.85], [130.0, -64.75], [130.53, -64.97], [130.75, -65.5], [130.65, -65.75], [130.75, -66.0], [130.53, -66.53], [130.18, -66.68], [130.03, -67.03], [129.5, -67.25], [129.25, -67.15], [129.0, -67.25], [128.75, -67.15], [128.5, -67.25], [128.25, -67.15], [128.0, -67.25], [127.75, -67.15], [127.5, -67.25], [126.97, -67.03], [126.82, -66.68], [126.75, -66.65], [126.5, -66.75], [126.25, -66.65], [126.0, -66.75], [125.75, -66.65], [125.5, -66.75], [125.25, -66.65], [125.0, -66.75], [124.75, -66.65], [124.68, -66.68], [124.53, -67.03], [124.0, -67.25], [123.75, -67.15], [123.5, -67.25], [122.97, -67.03], [122.75, -66.5], [122.85, -66.25], [122.75, -66.0]]]]}, "2023-06-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.0, -65.75], [124.47, -65.53], [124.25, -65.0], [124.47, -64.47], [125.0, -64.25], [125.25, -64.35], [125.5, -64.25], [125.75, -64.35], [126.0, -64.25], [126.25, -64.35], [126.5, -64.25], [126.75, -64.35], [127.0, -64.25], [127.25, -64.35], [127.5, -64.25], [127.75, -64.35], [128.0, -64.25], [128.53, -64.47], [128.68, -64.82], [128.75, -64.85], [129.0, -64.75], [129.53, -64.97], [129.68, -65.32], [130.03, -65.47], [130.25, -66.0], [130.15, -66.25], [130.25, -66.5], [130.03, -67.03], [129.5, -67.25], [129.25, -67.15], [129.0, -67.25], [128.75, -67.15], [128.5, -67.25], [128.25, -67.15], [128.0, -67.25], [127.75, -67.15], [127.5, -67.25], [126.97, -67.03], [126.82, -66.68], [126.75, -66.65], [126.5, -66.75], [125.97, -66.53], [125.82, -66.18], [125.47, -66.03], [125.32, -65.68], [125.25, -65.65], [125.0, -65.75]]]]}, "2023-06-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.97, -66.53], [126.75, -66.0], [126.97, -65.47], [127.5, -65.25], [127.75, -65.35], [128.0, -65.25], [128.25, -65.35], [128.5, -65.25], [129.03, -65.47], [129.25, -66.0], [129.15, -66.25], [129.25, -66.5], [129.03, -67.03], [128.5, -67.25], [128.25, -67.15], [128.0, -67.25], [127.47, -67.03], [127.32, -66.68], [126.97, -66.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.257924789767344}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.102514888321147}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-20.597806029325398, -19.540445144663977, -20.276671256408378, -21.964186907715174, -21.63020788340924, -21.2563111292165, -21.34985736226224]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-21.697387406810464, -21.587457277608365, -23.74408803006733, -27.28373981889297, -26.129350497921138, -23.70949405950566, -22.206541793442767]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.827294204744348, -5.845425463495846, -6.475461092562392, -8.188895295511182, -7.794747323452369, -6.996622494226496, -6.589816525715316]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.843557227416824, -7.026130632486655, -8.738290231914078, -12.257924789767344, -11.259045215823875, -8.921069501104029, -7.296188756391729]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.512812832497583, -1.440385021681228, -1.6610166006723714, -2.135438989674162, -1.9761065239903686, -1.6158179579947385, -1.4299970364112287]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.812203081313985, -1.7211571445697236, -2.3234870504564986, -3.225826196618973, -2.8210046853693083, -2.0803512916738094, -1.4900111799734532]}}