{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:40.062662", "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": "2025-Sep-21_to_2025-Sep-23_110.5_34.5"}, "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": 2025090000564}, "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": "September 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 23 2025"}, "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": 101889.38555104651}, "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"]}, "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": 34.5}, "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": 110.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "110.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 108.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 113.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[107.97, 35.03], [108.5, 35.25], [108.75, 35.15], [108.82, 35.18], [108.97, 35.53], [109.5, 35.75], [109.75, 35.65], 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"coordinates": [[[[107.97, 33.97], [107.75, 34.5], [107.97, 35.03], [108.5, 35.25], [108.75, 35.15], [108.82, 35.18], [108.97, 35.53], [109.5, 35.75], [109.75, 35.65], [109.82, 35.68], [109.97, 36.03], [110.5, 36.25], [110.75, 36.15], [110.82, 36.18], [110.97, 36.53], [111.5, 36.75], [111.75, 36.65], [112.0, 36.75], [112.53, 36.53], [112.75, 36.0], [112.65, 35.75], [112.68, 35.68], [112.75, 35.65], [113.0, 35.75], [113.25, 35.65], [113.5, 35.75], [114.03, 35.53], [114.25, 35.0], [114.03, 34.47], [113.68, 34.32], [113.53, 33.97], [113.18, 33.82], [113.03, 33.47], [112.68, 33.32], [112.53, 32.97], [112.0, 32.75], [111.75, 32.85], [111.5, 32.75], [111.25, 32.85], [111.18, 32.82], [111.03, 32.47], [110.5, 32.25], [109.97, 32.47], [109.82, 32.82], [109.75, 32.85], [109.5, 32.75], [108.97, 32.97], [108.82, 33.32], [108.47, 33.47], [108.32, 33.82], [107.97, 33.97]]]]}, "2025-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.97, 33.97], [107.75, 34.5], [107.97, 35.03], 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amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.507748278289759}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.360484568277968, 13.564227803548192, 14.050739796956407]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.6428047180176, 10.592952982584677, 11.328608449300134]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.907128960711633, -4.578909650106274, -4.03720622405137]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.201674733507275, -6.073524896278741, -4.942119066658563]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9698265331720168, -1.9250528099297601, -1.7257845264405902]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3183978507376835, -2.4839945687826845, -1.9668996555929528]}}