{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:32.971724", "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-Feb-05_to_2026-Feb-07_117.0_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": 2026020000124}, "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 05 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 07 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": 65471.9243398637}, "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"]}, "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": 117.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.0\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": 118.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 40.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.0, 42.75], [115.75, 42.85], [115.5, 42.75], [114.97, 42.97], [114.75, 43.5], [114.97, 44.03], [115.32, 44.18], [115.35, 44.25], [115.25, 44.5], [115.47, 45.03], [116.0, 45.25], [116.25, 45.15], [116.5, 45.25], [116.75, 45.15], [117.0, 45.25], [117.25, 45.15], [117.5, 45.25], [117.75, 45.15], [118.0, 45.25], [118.25, 45.15], [118.5, 45.25], [119.03, 45.03], [119.25, 44.5], [119.03, 43.97], [118.68, 43.82], [118.53, 43.47], [118.18, 43.32], [118.15, 43.25], [118.18, 43.18], [118.53, 43.03], [118.75, 42.5], [118.54, 42.0], [118.75, 41.5], [118.53, 40.97], [118.18, 40.82], [118.03, 40.47], [117.5, 40.25], [116.97, 40.47], [116.82, 40.82], [116.75, 40.85], [116.5, 40.75], [116.25, 40.85], [116.0, 40.75], [115.75, 40.85], [115.5, 40.75], [114.97, 40.97], [114.75, 41.5], [114.97, 42.03], [115.32, 42.18], [115.47, 42.53], [116.0, 42.75]], [[116.43, 42.57], [116.32, 42.82], [116.25, 42.85], [116.0, 42.75], [116.43, 42.57]]]]}, "2026-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.0, 42.75], [115.75, 42.85], [115.5, 42.75], [114.97, 42.97], [114.75, 43.5], [114.97, 44.03], [115.32, 44.18], [115.35, 44.25], [115.25, 44.5], [115.47, 45.03], [116.0, 45.25], [116.25, 45.15], [116.5, 45.25], [116.75, 45.15], [117.0, 45.25], [117.25, 45.15], [117.5, 45.25], [117.75, 45.15], [118.0, 45.25], [118.25, 45.15], [118.5, 45.25], [119.03, 45.03], [119.25, 44.5], [119.03, 43.97], [118.68, 43.82], [118.53, 43.47], [118.18, 43.32], [118.15, 43.25], [118.18, 43.18], [118.53, 43.03], [118.75, 42.5], [118.54, 42.0], [118.75, 41.5], [118.53, 40.97], [118.18, 40.82], [118.03, 40.47], [117.5, 40.25], [116.97, 40.47], [116.82, 40.82], [116.75, 40.85], [116.5, 40.75], [116.25, 40.85], [116.0, 40.75], [115.75, 40.85], [115.5, 40.75], [114.97, 40.97], [114.75, 41.5], [114.97, 42.03], [115.32, 42.18], [115.47, 42.53], [116.0, 42.75]], [[116.43, 42.57], [116.32, 42.82], [116.25, 42.85], [116.0, 42.75], [116.43, 42.57]]]]}, "2026-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.0, 42.75], [115.75, 42.85], [115.5, 42.75], [114.97, 42.97], [114.75, 43.5], [114.97, 44.03], [115.32, 44.18], [115.35, 44.25], [115.25, 44.5], [115.47, 45.03], [116.0, 45.25], [116.25, 45.15], [116.5, 45.25], [116.75, 45.15], [117.0, 45.25], [117.25, 45.15], [117.5, 45.25], [117.75, 45.15], [118.0, 45.25], [118.25, 45.15], [118.5, 45.25], [119.03, 45.03], [119.25, 44.5], [119.03, 43.97], [118.68, 43.82], [118.53, 43.47], [118.18, 43.32], [118.15, 43.25], [118.18, 43.18], [118.53, 43.03], [118.75, 42.5], [118.54, 42.0], [118.75, 41.5], [118.53, 40.97], [118.18, 40.82], [118.03, 40.47], [117.5, 40.25], [116.97, 40.47], [116.82, 40.82], [116.75, 40.85], [116.5, 40.75], [116.25, 40.85], [116.0, 40.75], [115.75, 40.85], [115.5, 40.75], [114.97, 40.97], [114.75, 41.5], [114.97, 42.03], [115.32, 42.18], [115.47, 42.53], [116.0, 42.75]], [[116.43, 42.57], [116.32, 42.82], [116.25, 42.85], [116.0, 42.75], [116.43, 42.57]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.726645292083873}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.300105691382031}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-23.460399373372383, -23.106055630212524, -20.748054184310718]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-29.418982569376595, -28.710965855916328, -25.020200475056953]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.072806241355183, -8.993748553769597, -6.833762279021311]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.601515003753121, -12.726645292083873, -8.736550546753193]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8499096737925829, -1.85145328114955, -1.4015631582200971]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4444983451260804, -2.4734135016428405, -1.722219803399635]}}