{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:29:14.321537", "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": "2022-Feb-08_to_2022-Feb-10_109.0_22.5"}, "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": 2022020000392}, "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": "February 08 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 10 2022"}, "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": 56700.842061089104}, "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": 22.5}, "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": 109.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "109.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 107.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 110.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.35, 24.25], [107.25, 24.5], [107.47, 25.03], [108.0, 25.25], [108.25, 25.15], [108.5, 25.25], [108.75, 25.15], [109.0, 25.25], [109.53, 25.03], [109.68, 24.68], [110.03, 24.53], [110.18, 24.18], [110.25, 24.15], [110.5, 24.25], [111.03, 24.03], [111.25, 23.5], [111.03, 22.97], [110.68, 22.82], [110.53, 22.47], [110.0, 22.25], [109.75, 22.35], [109.68, 22.32], [109.53, 21.97], [109.18, 21.82], [109.03, 21.47], [108.5, 21.25], [107.97, 21.47], [107.75, 22.0], [107.85, 22.25], [107.75, 22.5], [107.85, 22.75], [107.82, 22.82], [107.47, 22.97], [107.25, 23.5], [107.35, 23.75], [107.25, 24.0], [107.35, 24.25]]]]}, "2022-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.35, 24.25], [107.25, 24.5], [107.47, 25.03], [108.0, 25.25], [108.25, 25.15], [108.5, 25.25], [108.75, 25.15], [109.0, 25.25], [109.53, 25.03], [109.68, 24.68], [110.03, 24.53], [110.18, 24.18], [110.25, 24.15], [110.5, 24.25], [111.03, 24.03], [111.25, 23.5], [111.03, 22.97], [110.68, 22.82], [110.53, 22.47], [110.0, 22.25], [109.75, 22.35], [109.68, 22.32], [109.53, 21.97], [109.18, 21.82], [109.03, 21.47], [108.5, 21.25], [107.97, 21.47], [107.75, 22.0], [107.85, 22.25], [107.75, 22.5], [107.85, 22.75], [107.82, 22.82], [107.47, 22.97], [107.25, 23.5], [107.35, 23.75], [107.25, 24.0], [107.35, 24.25]]]]}, "2022-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.35, 24.25], [107.25, 24.5], [107.47, 25.03], [108.0, 25.25], [108.25, 25.15], [108.5, 25.25], [108.75, 25.15], [109.0, 25.25], [109.53, 25.03], [109.68, 24.68], [110.03, 24.53], [110.18, 24.18], [110.25, 24.15], [110.5, 24.25], [111.03, 24.03], [111.25, 23.5], [111.03, 22.97], [110.68, 22.82], [110.53, 22.47], [110.0, 22.25], [109.75, 22.35], [109.68, 22.32], [109.53, 21.97], [109.18, 21.82], [109.03, 21.47], [108.5, 21.25], [107.97, 21.47], [107.75, 22.0], [107.85, 22.25], [107.75, 22.5], [107.85, 22.75], [107.82, 22.82], [107.47, 22.97], [107.25, 23.5], [107.35, 23.75], [107.25, 24.0], [107.35, 24.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.911837018228596}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.510058562613683}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.976496561683291, 6.832727390923083, 7.649240755764538]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.97951142951689, 5.5254719645018895, 6.2472169847100645]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.563515315347644, -6.841994468418486, -6.124665904074919]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.371796218386521, -7.911837018228596, -6.731157651211788]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4831570086085641, -1.5407631097824548, -1.3755644902116622]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5979938810500331, -1.766749660694738, -1.5239019460716794]}}