{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:19.316106", "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-Oct-23_to_2025-Oct-25_114.5_-22.5"}, "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": 2025100000568}, "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": "October 23 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 25 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": 87843.80504237373}, "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": ["Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Oceania"]}, "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": ["Indian Ocean"]}, "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": -22.5}, "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": 114.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "114.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[113.25, -24.0], [113.35, -23.75], [113.25, -23.5], [113.35, -23.25], [113.25, -23.0], [113.35, -22.75], [113.25, -22.5], [113.35, -22.25], [113.25, -22.0], [113.35, -21.75], [113.25, -21.5], [113.47, -20.97], [113.82, -20.82], [113.97, -20.47], [114.5, -20.25], [115.03, -20.47], [115.25, -21.0], [115.15, -21.25], [115.18, -21.32], [115.53, -21.47], [115.75, -22.0], [115.65, -22.25], [115.68, -22.32], [116.03, -22.47], [116.25, -23.0], [116.15, -23.25], [116.25, -23.5], [116.15, -23.75], [116.25, -24.0], [116.15, -24.25], [116.25, -24.5], [116.15, -24.75], [116.25, -25.0], [116.03, -25.53], [115.5, -25.75], [115.25, -25.65], [115.18, -25.68], [115.15, -25.75], [115.25, -26.0], [115.03, -26.53], [114.5, -26.75], [113.97, -26.53], [113.75, -26.0], [113.85, -25.75], [113.82, -25.68], [113.47, -25.53], [113.25, -25.0], [113.35, -24.75], [113.25, -24.5], [113.35, -24.25], [113.25, -24.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, -24.5], [113.35, -24.25], [113.25, -24.0], [113.35, -23.75], [113.25, -23.5], [113.35, -23.25], [113.25, -23.0], [113.35, -22.75], [113.25, -22.5], [113.35, -22.25], [113.25, -22.0], [113.35, -21.75], [113.25, -21.5], [113.47, -20.97], [113.82, -20.82], [113.97, -20.47], [114.5, -20.25], [115.03, -20.47], [115.25, -21.0], [115.15, -21.25], [115.18, -21.32], [115.53, -21.47], [115.75, -22.0], [115.65, -22.25], [115.68, -22.32], [116.03, -22.47], [116.25, -23.0], [116.15, -23.25], [116.25, -23.5], [116.15, -23.75], [116.25, -24.0], [116.15, -24.25], [116.25, -24.5], [116.15, -24.75], [116.25, -25.0], [116.03, -25.53], [115.5, -25.75], [115.25, -25.65], [115.18, -25.68], [115.15, -25.75], [115.25, -26.0], [115.03, -26.53], [114.5, -26.75], [113.97, -26.53], [113.75, -26.0], [113.85, -25.75], [113.82, -25.68], [113.47, -25.53], [113.25, -25.0], [113.35, -24.75], [113.25, -24.5]]]]}, "2025-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, -24.5], [113.35, -24.25], [113.25, -24.0], [113.35, -23.75], [113.25, -23.5], [113.35, -23.25], [113.25, -23.0], [113.35, -22.75], [113.25, -22.5], [113.35, -22.25], [113.25, -22.0], [113.35, -21.75], [113.25, -21.5], [113.47, -20.97], [113.82, -20.82], [113.97, -20.47], [114.5, -20.25], [115.03, -20.47], [115.25, -21.0], [115.15, -21.25], [115.18, -21.32], [115.53, -21.47], [115.75, -22.0], [115.65, -22.25], [115.68, -22.32], [116.03, -22.47], [116.25, -23.0], [116.15, -23.25], [116.25, -23.5], [116.15, -23.75], [116.25, -24.0], [116.15, -24.25], [116.25, -24.5], [116.15, -24.75], [116.25, -25.0], [116.03, -25.53], [115.5, -25.75], [115.25, -25.65], [115.18, -25.68], [115.15, -25.75], [115.25, -26.0], [115.03, -26.53], [114.5, -26.75], [113.97, -26.53], [113.75, -26.0], [113.85, -25.75], [113.82, -25.68], [113.47, -25.53], [113.25, -25.0], [113.35, -24.75], [113.25, -24.5]]]]}, "2025-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, -24.5], [113.35, -24.25], [113.25, -24.0], [113.35, -23.75], [113.25, -23.5], [113.35, -23.25], [113.25, -23.0], [113.35, -22.75], [113.25, -22.5], [113.35, -22.25], [113.25, -22.0], [113.35, -21.75], [113.25, -21.5], [113.47, -20.97], [113.82, -20.82], [113.97, -20.47], [114.5, -20.25], [115.03, -20.47], [115.25, -21.0], [115.15, -21.25], [115.18, -21.32], [115.53, -21.47], [115.75, -22.0], [115.65, -22.25], [115.68, -22.32], [116.03, -22.47], [116.25, -23.0], [116.15, -23.25], [116.25, -23.5], [116.15, -23.75], [116.25, -24.0], [116.15, -24.25], [116.25, -24.5], [116.15, -24.75], [116.25, -25.0], [116.03, -25.53], [115.5, -25.75], [115.25, -25.65], [115.18, -25.68], [115.15, -25.75], [115.25, -26.0], [115.03, -26.53], [114.5, -26.75], [113.97, -26.53], [113.75, -26.0], [113.85, -25.75], [113.82, -25.68], [113.47, -25.53], [113.25, -25.0], [113.35, -24.75], [113.25, -24.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.2197846429132255}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.581512648361468}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.7675136114961, 21.1761751974783, 21.949775211785493]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.224786376953148, 19.577720896403036, 20.172699228922568]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.5172135661658546, -4.025654397536839, -3.201669981381711]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.205105895199608, -5.2197846429132255, -4.301554070150075]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5769767921254163, -1.7857574074611446, -1.396602775553527]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.871938593086298, -2.006295480548968, -1.6010893644056525]}}