{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:14.473414", "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": "2021-Apr-29_to_2021-May-01_118.0_44.0"}, "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": 2021040001184}, "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": "April 29 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 01 2021"}, "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": 61672.13169306963}, "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", "E.C.Asia", "E.Siberia"]}, "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": 44.0}, "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": 118.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "118.0\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": 119.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.75, 44.5], [114.97, 45.03], [115.32, 45.18], [115.47, 45.53], [115.82, 45.68], [115.97, 46.03], [116.5, 46.25], [117.0, 46.04], [117.5, 46.25], [117.75, 46.15], [118.0, 46.25], [118.25, 46.15], [118.5, 46.25], [119.03, 46.03], [119.25, 45.5], [119.15, 45.25], [119.18, 45.18], [119.25, 45.15], [119.5, 45.25], [120.03, 45.03], [120.25, 44.5], [120.03, 43.97], [119.68, 43.82], [119.53, 43.47], [119.0, 43.25], [118.75, 43.35], [118.5, 43.25], [118.25, 43.35], [118.0, 43.25], [117.75, 43.35], [117.68, 43.32], [117.53, 42.97], [117.0, 42.75], [116.75, 42.85], [116.5, 42.75], [115.97, 42.97], [115.82, 43.32], [115.47, 43.47], [115.32, 43.82], [114.97, 43.97], [114.75, 44.5]]]]}, "2021-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.75, 44.5], [114.97, 45.03], [115.32, 45.18], [115.47, 45.53], [115.82, 45.68], [115.97, 46.03], [116.5, 46.25], [117.0, 46.04], [117.5, 46.25], [117.75, 46.15], [118.0, 46.25], [118.25, 46.15], [118.5, 46.25], [119.03, 46.03], [119.25, 45.5], [119.15, 45.25], [119.18, 45.18], [119.25, 45.15], [119.5, 45.25], [120.03, 45.03], [120.25, 44.5], [120.03, 43.97], [119.68, 43.82], [119.53, 43.47], [119.0, 43.25], [118.75, 43.35], [118.5, 43.25], [118.25, 43.35], [118.0, 43.25], [117.75, 43.35], [117.68, 43.32], [117.53, 42.97], [117.0, 42.75], [116.75, 42.85], [116.5, 42.75], [115.97, 42.97], [115.82, 43.32], [115.47, 43.47], [115.32, 43.82], [114.97, 43.97], [114.75, 44.5]]]]}, "2021-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.75, 44.5], [114.97, 45.03], [115.32, 45.18], [115.47, 45.53], [115.82, 45.68], [115.97, 46.03], [116.5, 46.25], [117.0, 46.04], [117.5, 46.25], [117.75, 46.15], [118.0, 46.25], [118.25, 46.15], [118.5, 46.25], [119.03, 46.03], [119.25, 45.5], [119.15, 45.25], [119.18, 45.18], [119.25, 45.15], [119.5, 45.25], [120.03, 45.03], [120.25, 44.5], [120.03, 43.97], [119.68, 43.82], [119.53, 43.47], [119.0, 43.25], [118.75, 43.35], [118.5, 43.25], [118.25, 43.35], [118.0, 43.25], [117.75, 43.35], [117.68, 43.32], [117.53, 42.97], [117.0, 42.75], [116.75, 42.85], [116.5, 42.75], [115.97, 42.97], [115.82, 43.32], [115.47, 43.47], [115.32, 43.82], [114.97, 43.97], [114.75, 44.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.612538254966182}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.5641920290558415}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [0.6721335124503867, 1.694100062089376, 2.481658955538194]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-1.1653482518229907, -0.12139335805869678, 0.6941929769394619]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.15103996484432, -7.453277552532429, -7.088258569790767]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.612538254966182, -8.376430579580585, -8.113072673771]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.752317978358869, -1.5982299334048036, -1.5265814620981177]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8687316712921738, -1.793606269033166, -1.7718256443091132]}}