{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:53:09.767303", "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": "2024-Sep-30_to_2024-Oct-03_117.5_37.0"}, "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": 2024090000614}, "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": "September 30 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 03 2024"}, "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": 94745.68627535277}, "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": ["China"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": ["Yellow 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": 37.0}, "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": 117.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 119.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 40.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.35, 37.25], [114.25, 37.5], [114.47, 38.03], [114.82, 38.18], [114.97, 38.53], [115.32, 38.68], [115.47, 39.03], [115.82, 39.18], [115.97, 39.53], [116.32, 39.68], [116.47, 40.03], [116.82, 40.18], [116.97, 40.53], [117.5, 40.75], [117.75, 40.65], [118.0, 40.75], [118.25, 40.65], [118.5, 40.75], [119.0, 40.54], [119.5, 40.75], [120.03, 40.53], [120.25, 40.0], [120.15, 39.75], [120.25, 39.5], [120.03, 38.97], [119.5, 38.75], [119.25, 38.85], [119.0, 38.75], [118.75, 38.85], [118.5, 38.75], [118.25, 38.85], [118.18, 38.82], [118.15, 38.75], [118.25, 38.5], [118.15, 38.25], [118.25, 38.0], [118.15, 37.75], [118.25, 37.5], [118.15, 37.25], [118.25, 37.0], [118.03, 36.47], [117.68, 36.32], [117.53, 35.97], [117.0, 35.75], [116.75, 35.85], [116.5, 35.75], [115.97, 35.97], [115.82, 36.32], [115.75, 36.35], [115.68, 36.32], [115.53, 35.97], [115.0, 35.75], [114.47, 35.97], [114.25, 36.5], [114.35, 36.75], [114.25, 37.0], [114.35, 37.25]]]]}, "2024-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.35, 37.25], [114.25, 37.5], [114.47, 38.03], [114.82, 38.18], [114.97, 38.53], [115.32, 38.68], [115.47, 39.03], [115.82, 39.18], [115.97, 39.53], [116.32, 39.68], [116.47, 40.03], [116.82, 40.18], [116.97, 40.53], [117.5, 40.75], [117.75, 40.65], [118.0, 40.75], [118.25, 40.65], [118.5, 40.75], [119.0, 40.54], [119.5, 40.75], [120.03, 40.53], [120.25, 40.0], [120.15, 39.75], [120.25, 39.5], [120.03, 38.97], [119.5, 38.75], [119.25, 38.85], [119.0, 38.75], [118.75, 38.85], [118.5, 38.75], [118.25, 38.85], [118.18, 38.82], [118.15, 38.75], [118.25, 38.5], [118.15, 38.25], [118.18, 38.18], [118.53, 38.03], [118.75, 37.5], [118.65, 37.25], [118.75, 37.0], [118.53, 36.47], [118.0, 36.25], [117.75, 36.35], [117.68, 36.32], [117.53, 35.97], [117.0, 35.75], [116.75, 35.85], [116.5, 35.75], [115.97, 35.97], [115.82, 36.32], [115.75, 36.35], [115.68, 36.32], [115.53, 35.97], [115.0, 35.75], [114.47, 35.97], [114.25, 36.5], [114.35, 36.75], [114.25, 37.0], [114.35, 37.25]]]]}, "2024-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.35, 37.25], [114.25, 37.5], [114.47, 38.03], [114.82, 38.18], [114.97, 38.53], [115.32, 38.68], [115.47, 39.03], [115.82, 39.18], [115.97, 39.53], [116.32, 39.68], [116.47, 40.03], [116.82, 40.18], [116.97, 40.53], [117.5, 40.75], [117.75, 40.65], [118.0, 40.75], [118.25, 40.65], [118.5, 40.75], [119.0, 40.54], [119.5, 40.75], [120.03, 40.53], [120.25, 40.0], [120.15, 39.75], [120.25, 39.5], [120.03, 38.97], [119.5, 38.75], [119.25, 38.85], [119.0, 38.75], [118.75, 38.85], [118.5, 38.75], [118.25, 38.85], [118.18, 38.82], [118.15, 38.75], [118.25, 38.5], [118.15, 38.25], [118.18, 38.18], [118.53, 38.03], [118.75, 37.5], [118.65, 37.25], [118.75, 37.0], [118.53, 36.47], [118.0, 36.25], [117.75, 36.35], [117.68, 36.32], [117.53, 35.97], [117.0, 35.75], [116.75, 35.85], [116.5, 35.75], [115.97, 35.97], [115.82, 36.32], [115.75, 36.35], [115.68, 36.32], [115.53, 35.97], [115.0, 35.75], [114.47, 35.97], [114.25, 36.5], [114.35, 36.75], [114.25, 37.0], [114.35, 37.25]]]]}, "2024-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.47, 36.47], [116.25, 37.0], [116.47, 37.53], [117.0, 37.75], [117.25, 37.65], [117.32, 37.68], [117.47, 38.03], [118.0, 38.25], [118.53, 38.03], [118.75, 37.5], [118.65, 37.25], [118.75, 37.0], [118.53, 36.47], [118.0, 36.25], [117.75, 36.35], [117.5, 36.25], [117.25, 36.35], [117.0, 36.25], [116.47, 36.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.428352801698111}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.13196114069303}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.928890826251063, 13.187545345991168, 12.846182400956081, 14.246216074625636]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.15749003092452, 10.394370015462243, 11.676346079508505, 13.780965423584007]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.468970337932258, -4.988349207983024, -5.075917261762996, -3.9612702297205686]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.428352801698111, -6.003752957180666, -5.979483123862451, -4.33003114954937]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9809192642936178, -1.8193046186414823, -1.8432253875542728, -1.4207338648112864]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4351230867860987, -2.2541627597973957, -2.1137295539813192, -1.5511292680125504]}}