{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:35.702143", "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-May-21_to_2021-May-23_95.0_42.5"}, "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": 2021050000882}, "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": "May 21 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 23 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": 57586.11245719381}, "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.C.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": 42.5}, "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": 95.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "95.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 93.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 96.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-05-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.85, 41.75], [92.75, 42.0], [92.85, 42.25], [92.75, 42.5], [92.97, 43.03], [93.32, 43.18], [93.47, 43.53], [94.0, 43.75], [94.25, 43.65], [94.5, 43.75], [95.03, 43.53], [95.18, 43.18], [95.25, 43.15], [95.5, 43.25], [95.75, 43.15], [96.0, 43.25], [96.53, 43.03], [96.75, 42.5], [96.54, 42.0], [96.75, 41.5], [96.53, 40.97], [96.18, 40.82], [96.03, 40.47], [95.5, 40.25], [95.25, 40.35], [95.18, 40.32], [95.03, 39.97], [94.5, 39.75], [93.97, 39.97], [93.82, 40.32], [93.75, 40.35], [93.5, 40.25], [92.97, 40.47], [92.75, 41.0], [92.85, 41.25], [92.75, 41.5], [92.85, 41.75]]]]}, "2021-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.85, 41.75], [92.75, 42.0], [92.85, 42.25], [92.75, 42.5], [92.97, 43.03], [93.32, 43.18], [93.47, 43.53], [94.0, 43.75], [94.25, 43.65], [94.5, 43.75], [95.03, 43.53], [95.18, 43.18], [95.25, 43.15], [95.5, 43.25], [95.75, 43.15], [96.0, 43.25], [96.53, 43.03], [96.75, 42.5], [96.54, 42.0], [96.75, 41.5], [96.53, 40.97], [96.18, 40.82], [96.03, 40.47], [95.5, 40.25], [95.25, 40.35], [95.18, 40.32], [95.03, 39.97], [94.5, 39.75], [93.97, 39.97], [93.82, 40.32], [93.75, 40.35], [93.5, 40.25], [92.97, 40.47], [92.75, 41.0], [92.85, 41.25], [92.75, 41.5], [92.85, 41.75]]]]}, "2021-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.85, 41.75], [92.75, 42.0], [92.85, 42.25], [92.75, 42.5], [92.97, 43.03], [93.32, 43.18], [93.47, 43.53], [94.0, 43.75], [94.25, 43.65], [94.5, 43.75], [95.03, 43.53], [95.18, 43.18], [95.25, 43.15], [95.5, 43.25], [95.75, 43.15], [96.0, 43.25], [96.53, 43.03], [96.75, 42.5], [96.54, 42.0], [96.75, 41.5], [96.53, 40.97], [96.18, 40.82], [96.03, 40.47], [95.5, 40.25], [95.25, 40.35], [95.18, 40.32], [95.03, 39.97], [94.5, 39.75], [93.97, 39.97], [93.82, 40.32], [93.75, 40.35], [93.5, 40.25], [92.97, 40.47], [92.75, 41.0], [92.85, 41.25], [92.75, 41.5], [92.85, 41.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.358293412490582}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.958257302161949}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.149178541742685, 9.440580235707785, 12.554288463420505]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-2.0673584622069257, -2.2375581077705533, 2.7361072537023574]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.913504958984717, -8.902576543121961, -6.058690404379167]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.358293412490582, -10.343888144090954, -7.5154120321980145]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.335887120757521, -2.3738803742700707, -1.6339077664820925]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.618200650871279, -2.6836333160367416, -1.9596821479903057]}}