{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:07.753745", "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-May-27_to_2025-May-30_128.5_-24.5"}, "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": 2025050000648}, "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 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 30 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 56241.57371756208}, "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": []}, "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": -24.5}, "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": 128.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "128.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 127.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[127.0, -23.25], [127.25, -23.35], [127.5, -23.25], [127.75, -23.35], [128.0, -23.25], [128.25, -23.35], [128.32, -23.32], [128.47, -22.97], [129.0, -22.75], [129.53, -22.97], [129.68, -23.32], [130.03, -23.47], [130.18, -23.82], [130.53, -23.97], [130.75, -24.5], [130.65, -24.75], [130.75, -25.0], [130.53, -25.53], [130.18, -25.68], [130.03, -26.03], [129.5, -26.25], [129.25, -26.15], [129.0, -26.25], [128.47, -26.03], [128.32, -25.68], [128.25, -25.65], [128.0, -25.75], [127.47, -25.53], [127.32, -25.18], [126.97, -25.03], [126.82, -24.68], [126.47, -24.53], [126.25, -24.0], [126.47, -23.47], [127.0, -23.25]]]]}}, "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": {"2025-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, -24.53], [126.25, -24.0], [126.47, -23.47], [127.0, -23.25], [127.25, -23.35], [127.5, -23.25], [127.75, -23.35], [128.0, -23.25], [128.25, -23.35], [128.32, -23.32], [128.47, -22.97], [129.0, -22.75], [129.53, -22.97], [129.68, -23.32], [130.03, -23.47], [130.18, -23.82], [130.53, -23.97], [130.75, -24.5], [130.65, -24.75], [130.75, -25.0], [130.53, -25.53], [130.18, -25.68], [130.03, -26.03], [129.5, -26.25], [129.25, -26.15], [129.0, -26.25], [128.47, -26.03], [128.32, -25.68], [128.25, -25.65], [128.0, -25.75], [127.47, -25.53], [127.32, -25.18], [126.97, -25.03], [126.82, -24.68], [126.47, -24.53]]]]}, "2025-05-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, -24.53], [126.25, -24.0], [126.47, -23.47], [127.0, -23.25], [127.25, -23.35], [127.5, -23.25], [127.75, -23.35], [128.0, -23.25], [128.25, -23.35], [128.32, -23.32], [128.47, -22.97], [129.0, -22.75], [129.53, -22.97], [129.68, -23.32], [130.03, -23.47], [130.18, -23.82], [130.53, -23.97], [130.75, -24.5], [130.65, -24.75], [130.75, -25.0], [130.53, -25.53], [130.18, -25.68], [130.03, -26.03], [129.5, -26.25], [129.25, -26.15], [129.0, -26.25], [128.47, -26.03], [128.32, -25.68], [128.25, -25.65], [128.0, -25.75], [127.47, -25.53], [127.32, -25.18], [126.97, -25.03], [126.82, -24.68], [126.47, -24.53]]]]}, "2025-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.47, -24.53], [126.25, -24.0], [126.47, -23.47], [127.0, -23.25], [127.25, -23.35], [127.5, -23.25], [127.75, -23.35], [128.0, -23.25], [128.25, -23.35], [128.32, -23.32], [128.47, -22.97], [129.0, -22.75], [129.53, -22.97], [129.68, -23.32], [130.03, -23.47], [130.18, -23.82], [130.53, -23.97], [130.75, -24.5], [130.65, -24.75], [130.75, -25.0], [130.53, -25.53], [130.18, -25.68], [130.03, -26.03], [129.5, -26.25], [129.25, -26.15], [129.0, -26.25], [128.47, -26.03], [128.32, -25.68], [128.25, -25.65], [128.0, -25.75], [127.47, -25.53], [127.32, -25.18], [126.97, -25.03], [126.82, -24.68], [126.47, -24.53]]]]}, "2025-05-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.97, -23.97], [128.5, -23.75], [129.03, -23.97], [129.25, -24.5], [129.03, -25.03], [128.5, -25.25], [127.97, -25.03], [127.75, -24.5], [127.97, -23.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.765939989515687}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.476396731428503}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.605257670084654, 11.318581644694063, 12.767056274414074, 13.435477193196618]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.288468933105491, 9.729051208496116, 11.1000966389974, 13.435477193196618]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.025147873758729, -5.058309665919458, -3.42596073808769, -2.871835061821116]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.765939989515687, -5.5561363691514885, -3.863917610372198, -2.871835061821116]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7193931639805755, -1.7587055760395938, -1.1944367956052737, -1.02836160390642]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9882595521085753, -1.8934257116734232, -1.3389284439104578, -1.02836160390642]}}