{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:23.274964", "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-Jan-22_to_2012-Jan-25_120.0_29.0"}, "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": 2012010001152}, "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": "January 22 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 25 2012"}, "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": 67158.19698910855}, "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": ["Eastern China 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": 29.0}, "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": 120.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "120.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 118.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 122.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.0, 30.25], [119.25, 30.15], [119.38, 30.2], [119.25, 30.5], [119.47, 31.03], [120.0, 31.25], [120.25, 31.15], [120.32, 31.18], [120.47, 31.53], [121.0, 31.75], [121.53, 31.53], [121.68, 31.18], [122.03, 31.03], [122.25, 30.5], [122.03, 29.97], [121.68, 29.82], [121.65, 29.75], [121.75, 29.5], [121.65, 29.25], [121.75, 29.0], [121.65, 28.75], [121.75, 28.5], [121.53, 27.97], [121.0, 27.75], [120.47, 27.97], [120.32, 28.32], [120.25, 28.35], [120.18, 28.32], [120.03, 27.97], [119.5, 27.75], [118.97, 27.97], [118.82, 28.32], [118.75, 28.35], [118.5, 28.25], [117.97, 28.47], [117.75, 29.0], [117.97, 29.53], [118.32, 29.68], [118.47, 30.03], [119.0, 30.25]]]]}, "2012-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.0, 30.25], [119.25, 30.15], [119.38, 30.2], [119.25, 30.5], [119.47, 31.03], [120.0, 31.25], [120.25, 31.15], [120.32, 31.18], [120.47, 31.53], [121.0, 31.75], [121.3, 31.63], [121.47, 32.03], [122.0, 32.25], [122.53, 32.03], [122.75, 31.5], [122.65, 31.25], [122.75, 31.0], [122.53, 30.47], [122.18, 30.32], [122.15, 30.25], [122.25, 30.0], [122.15, 29.75], [122.25, 29.5], [122.15, 29.25], [122.25, 29.0], [122.15, 28.75], [122.25, 28.5], [122.03, 27.97], [121.5, 27.75], [121.25, 27.85], [121.0, 27.75], [120.47, 27.97], [120.32, 28.32], [120.25, 28.35], [120.18, 28.32], [120.03, 27.97], [119.5, 27.75], [118.97, 27.97], [118.82, 28.32], [118.75, 28.35], [118.5, 28.25], [117.97, 28.47], [117.75, 29.0], [117.97, 29.53], [118.32, 29.68], [118.47, 30.03], [119.0, 30.25]]]]}, "2012-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.0, 30.25], [119.25, 30.15], [119.38, 30.2], [119.25, 30.5], [119.47, 31.03], [120.0, 31.25], [120.25, 31.15], [120.32, 31.18], [120.47, 31.53], [121.0, 31.75], [121.3, 31.63], [121.47, 32.03], [122.0, 32.25], [122.53, 32.03], [122.75, 31.5], [122.65, 31.25], [122.75, 31.0], [122.53, 30.47], [122.18, 30.32], [122.15, 30.25], [122.25, 30.0], [122.15, 29.75], [122.25, 29.5], [122.15, 29.25], [122.25, 29.0], [122.15, 28.75], [122.25, 28.5], [122.03, 27.97], [121.5, 27.75], [121.25, 27.85], [121.0, 27.75], [120.47, 27.97], [120.32, 28.32], [120.25, 28.35], [120.18, 28.32], [120.03, 27.97], [119.5, 27.75], [118.97, 27.97], [118.82, 28.32], [118.75, 28.35], [118.5, 28.25], [117.97, 28.47], [117.75, 29.0], [117.97, 29.53], [118.32, 29.68], [118.47, 30.03], [119.0, 30.25]]]]}, "2012-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.97, 28.47], [117.75, 29.0], [117.97, 29.53], [118.5, 29.75], [118.75, 29.65], [118.82, 29.68], [118.97, 30.03], [119.5, 30.25], [119.75, 30.15], [119.88, 30.2], [119.75, 30.5], [119.97, 31.03], [120.32, 31.18], [120.47, 31.53], [121.0, 31.75], [121.3, 31.63], [121.47, 32.03], [122.0, 32.25], [122.53, 32.03], [122.75, 31.5], [122.65, 31.25], [122.75, 31.0], [122.53, 30.47], [122.13, 30.3], [122.25, 30.0], [122.15, 29.75], [122.25, 29.5], [122.15, 29.25], [122.25, 29.0], [122.15, 28.75], [122.25, 28.5], [122.03, 27.97], [121.5, 27.75], [121.25, 27.85], [121.0, 27.75], [120.47, 27.97], [120.32, 28.32], [120.25, 28.35], [120.0, 28.25], [119.75, 28.35], [119.5, 28.25], [119.25, 28.35], [119.0, 28.25], [118.75, 28.35], [118.5, 28.25], [117.97, 28.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.04904053228347}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.550898158366996}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.08961200151782123, 0.5458164265159553, 0.36221239340358125, 0.5287101994585441]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.0512107304563756, -1.3115794832338565, -1.3998378143035666, -0.9204255030996933]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.757323541883059, -4.4726026843486055, -4.530177688427711, -4.478563973973829]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.768477401164375, -5.039763193817237, -6.04904053228347, -5.3519016394789105]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3748089558874772, -1.3816471146532074, -1.4533745672311236, -1.4155195048602431]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5076994598387996, -1.5573121430590278, -1.7741604506275588, -1.626849392746457]}}