{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:23.289309", "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": "2010-Dec-30_to_2011-Jan-01_117.0_36.5"}, "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": 2010120001427}, "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": "December 30 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2011"}, "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": 62749.98479791314}, "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": []}, "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": 36.5}, "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": 117.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 115.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.25, 36.0], [115.47, 36.53], [115.82, 36.68], [115.97, 37.03], [116.32, 37.18], [116.47, 37.53], [117.0, 37.75], [117.5, 37.54], [118.0, 37.75], [118.53, 37.53], [118.68, 37.18], [119.03, 37.03], [119.25, 36.5], [119.04, 36.0], [119.25, 35.5], [119.15, 35.25], [119.25, 35.0], [119.15, 34.75], [119.25, 34.5], [119.03, 33.97], [118.5, 33.75], [118.25, 33.85], [118.0, 33.75], [117.5, 33.96], [117.0, 33.75], [116.47, 33.97], [116.32, 34.32], [115.97, 34.47], [115.75, 35.0], [115.85, 35.25], [115.82, 35.32], [115.47, 35.47], [115.25, 36.0]]]]}, "2010-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.25, 36.0], [115.47, 36.53], [115.82, 36.68], [115.97, 37.03], [116.32, 37.18], [116.47, 37.53], [117.0, 37.75], [117.5, 37.54], [118.0, 37.75], [118.53, 37.53], [118.68, 37.18], [119.03, 37.03], [119.25, 36.5], [119.04, 36.0], [119.25, 35.5], [119.15, 35.25], [119.25, 35.0], [119.15, 34.75], [119.25, 34.5], [119.03, 33.97], [118.5, 33.75], [118.25, 33.85], [118.0, 33.75], [117.5, 33.96], [117.0, 33.75], [116.47, 33.97], [116.32, 34.32], [115.97, 34.47], [115.75, 35.0], [115.85, 35.25], [115.82, 35.32], [115.47, 35.47], [115.25, 36.0]]]]}, "2011-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.25, 36.0], [115.47, 36.53], [115.82, 36.68], [115.97, 37.03], [116.32, 37.18], [116.47, 37.53], [117.0, 37.75], [117.5, 37.54], [118.0, 37.75], [118.53, 37.53], [118.68, 37.18], [119.03, 37.03], [119.25, 36.5], [119.04, 36.0], [119.25, 35.5], [119.15, 35.25], [119.25, 35.0], [119.15, 34.75], [119.25, 34.5], [119.03, 33.97], [118.5, 33.75], [118.25, 33.85], [118.0, 33.75], [117.5, 33.96], [117.0, 33.75], [116.47, 33.97], [116.32, 34.32], [115.97, 34.47], [115.75, 35.0], [115.85, 35.25], [115.82, 35.32], [115.47, 35.47], [115.25, 36.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.026613375040711}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.627607994776354}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.983742397028323, -5.527340845025378, -4.91243064600377]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.691282991370258, -8.026681648165834, -7.0002342626704035]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.549798267727993, -5.0961947938827805, -4.236830922718289]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.728483586868606, -6.026613375040711, -4.938323221165319]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4089158951879055, -1.5952880736928348, -1.2709014280715762]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5965330104636786, -1.6962995100387654, -1.4056921266815543]}}