{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:59:17.939715", "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": "2026-Apr-28_to_2026-Apr-30_118.5_31.0"}, "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": 2026040000764}, "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 28 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 30 2026"}, "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": 146607.84584115763}, "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": 31.0}, "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": 118.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "118.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 121.25}, "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": 32.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, 29.0], [113.97, 29.53], [114.32, 29.68], [114.35, 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28.32], [113.97, 28.47], [113.75, 29.0]]]]}, "2026-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, 29.0], [113.97, 29.53], [114.32, 29.68], [114.35, 29.75], [114.25, 30.0], [114.35, 30.25], [114.25, 30.5], [114.35, 30.75], [114.25, 31.0], [114.47, 31.53], [115.0, 31.75], [115.25, 31.65], [115.5, 31.75], [115.8, 31.63], [115.97, 32.03], [116.32, 32.18], [116.47, 32.53], [117.0, 32.75], [117.53, 32.53], [117.68, 32.18], [117.75, 32.15], [118.0, 32.25], [118.25, 32.15], [118.5, 32.25], [118.75, 32.15], [119.0, 32.25], [119.25, 32.15], [119.5, 32.25], [119.75, 32.15], [120.0, 32.25], [120.53, 32.03], [120.68, 31.68], [120.75, 31.65], [121.0, 31.75], [121.53, 31.53], [121.75, 31.0], [121.53, 30.47], [121.18, 30.32], [121.03, 29.97], [120.68, 29.82], [120.53, 29.47], [120.0, 29.25], [119.75, 29.35], [119.5, 29.25], [119.25, 29.35], [119.18, 29.32], [119.03, 28.97], [118.5, 28.75], [118.25, 28.85], [118.0, 28.75], [117.75, 28.85], [117.5, 28.75], [117.25, 28.85], [117.0, 28.75], [116.75, 28.85], [116.5, 28.75], [116.25, 28.85], [116.18, 28.82], [116.03, 28.47], [115.68, 28.32], [115.53, 27.97], [115.0, 27.75], [114.47, 27.97], [114.32, 28.32], [113.97, 28.47], [113.75, 29.0]]]]}, "2026-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, 29.0], [113.97, 29.53], [114.32, 29.68], [114.35, 29.75], [114.25, 30.0], [114.35, 30.25], [114.25, 30.5], [114.35, 30.75], [114.25, 31.0], [114.47, 31.53], [115.0, 31.75], [115.25, 31.65], [115.5, 31.75], [115.8, 31.63], [115.97, 32.03], [116.32, 32.18], [116.47, 32.53], [117.0, 32.75], [117.53, 32.53], [117.68, 32.18], [117.75, 32.15], [118.0, 32.25], [118.25, 32.15], [118.5, 32.25], [118.75, 32.15], [119.0, 32.25], [119.25, 32.15], [119.5, 32.25], [119.75, 32.15], [120.0, 32.25], [120.53, 32.03], [120.68, 31.68], [120.75, 31.65], [121.0, 31.75], [121.53, 31.53], [121.75, 31.0], [121.53, 30.47], [121.18, 30.32], [121.03, 29.97], [120.68, 29.82], [120.53, 29.47], [120.0, 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[11.984221394856775, 8.244104003906273, 12.727098083496116]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.578033754708934, -8.50250914156251, -5.087615269954402]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.842319918162616, -10.479280161179872, -6.461540008758277]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8127548062126682, -2.834460267894728, -1.7147298906104043]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.168345213607004, -3.416988773600364, -2.1058400941809134]}}