{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:51:10.389681", "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": "2012-Aug-20_to_2012-Aug-22_119.0_44.5"}, "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": 2012080000971}, "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": "August 20 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 22 2012"}, "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": 58583.514741481646}, "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": 44.5}, "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": 119.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 115.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 120.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.88, 42.2], [115.75, 42.5], [115.85, 42.75], [115.75, 43.0], [115.97, 43.53], [116.5, 43.75], [116.75, 43.65], [116.82, 43.68], [116.97, 44.03], [117.5, 44.25], [117.75, 44.15], [118.0, 44.25], [118.25, 44.15], [118.32, 44.18], [118.35, 44.25], [118.25, 44.5], [118.47, 45.03], [119.0, 45.25], [119.25, 45.15], [119.32, 45.18], [119.47, 45.53], [120.0, 45.75], [120.53, 45.53], [120.68, 45.18], [121.03, 45.03], [121.25, 44.5], [121.04, 44.0], [121.25, 43.5], [121.03, 42.97], [120.5, 42.75], [120.25, 42.85], [120.0, 42.75], [119.75, 42.85], [119.5, 42.75], [119.0, 42.96], [118.63, 42.8], [118.75, 42.5], [118.53, 41.97], [118.18, 41.82], [118.03, 41.47], [117.5, 41.25], [117.25, 41.35], [117.18, 41.32], [117.03, 40.97], [116.5, 40.75], [116.25, 40.85], [116.18, 40.82], [116.03, 40.47], [115.5, 40.25], [114.97, 40.47], [114.75, 41.0], [114.97, 41.53], [115.32, 41.68], [115.47, 42.03], [115.88, 42.2]]]]}, "2012-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.88, 42.2], [115.75, 42.5], [115.85, 42.75], [115.75, 43.0], [115.97, 43.53], [116.5, 43.75], [116.75, 43.65], [116.82, 43.68], [116.97, 44.03], [117.5, 44.25], [117.75, 44.15], [118.0, 44.25], [118.25, 44.15], [118.32, 44.18], [118.35, 44.25], [118.25, 44.5], [118.47, 45.03], [119.0, 45.25], [119.25, 45.15], [119.32, 45.18], [119.47, 45.53], [120.0, 45.75], [120.53, 45.53], [120.68, 45.18], [121.03, 45.03], [121.25, 44.5], [121.04, 44.0], [121.25, 43.5], [121.03, 42.97], [120.5, 42.75], [120.25, 42.85], [120.0, 42.75], [119.75, 42.85], [119.5, 42.75], [119.0, 42.96], [118.63, 42.8], [118.75, 42.5], [118.53, 41.97], [118.18, 41.82], [118.03, 41.47], [117.5, 41.25], [117.25, 41.35], [117.18, 41.32], [117.03, 40.97], [116.5, 40.75], [116.25, 40.85], [116.18, 40.82], [116.03, 40.47], [115.5, 40.25], [114.97, 40.47], [114.75, 41.0], [114.97, 41.53], [115.32, 41.68], [115.47, 42.03], [115.88, 42.2]]]]}, "2012-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.88, 42.2], [115.75, 42.5], [115.85, 42.75], [115.75, 43.0], [115.97, 43.53], [116.5, 43.75], [116.75, 43.65], [116.82, 43.68], [116.97, 44.03], [117.5, 44.25], [117.75, 44.15], [118.0, 44.25], [118.25, 44.15], [118.32, 44.18], [118.35, 44.25], [118.25, 44.5], [118.47, 45.03], [119.0, 45.25], [119.25, 45.15], [119.32, 45.18], [119.47, 45.53], [120.0, 45.75], [120.53, 45.53], [120.68, 45.18], [121.03, 45.03], [121.25, 44.5], [121.04, 44.0], [121.25, 43.5], [121.03, 42.97], [120.5, 42.75], [120.25, 42.85], [120.0, 42.75], [119.75, 42.85], [119.5, 42.75], [119.0, 42.96], [118.63, 42.8], [118.75, 42.5], [118.53, 41.97], [118.18, 41.82], [118.03, 41.47], [117.5, 41.25], [117.25, 41.35], [117.18, 41.32], [117.03, 40.97], [116.5, 40.75], [116.25, 40.85], [116.18, 40.82], [116.03, 40.47], [115.5, 40.25], [114.97, 40.47], [114.75, 41.0], [114.97, 41.53], [115.32, 41.68], [115.47, 42.03], [115.88, 42.2]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.468641493558948}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.869535317847883}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.044734268035882, 12.492602538283393, 15.10881934783913]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.169028512384557, 8.62938412438092, 11.437803967715297]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.481010931669951, -5.904194027692241, -3.2234009941814574]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.401331507558666, -7.468641493558948, -3.709857791819161]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.265507050258147, -2.4712869759164198, -1.3887143315011912]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.121129482748372, -2.877261703063301, -1.623505342083528]}}