{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:29.377501", "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-Apr-27_to_2025-Apr-30_132.5_-12.0"}, "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": 2025040000655}, "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 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 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": 60512.249729809926}, "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": ["Arafura Sea"]}, "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": -12.0}, "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": 132.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "132.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 132.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 135.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -13.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[131.35, -11.75], [131.25, -11.5], [131.35, -11.25], [131.25, -11.0], [131.47, -10.47], [132.0, -10.25], [132.25, -10.35], [132.5, -10.25], [132.75, -10.35], [133.0, -10.25], [133.25, -10.35], [133.5, -10.25], [134.03, -10.47], [134.18, -10.82], [134.53, -10.97], [134.68, -11.32], [134.75, -11.35], [135.0, -11.25], [135.53, -11.47], [135.75, -12.0], [135.53, -12.53], [135.18, -12.68], [135.03, -13.03], [134.68, -13.18], [134.53, -13.53], [134.0, -13.75], [133.47, -13.53], [133.32, -13.18], [132.97, -13.03], [132.82, -12.68], [132.75, -12.65], [132.5, -12.75], [132.25, -12.65], [132.0, -12.75], [131.47, -12.53], [131.25, -12.0], [131.35, -11.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.0, -12.75], [131.47, -12.53], [131.25, -12.0], [131.47, -11.47], [132.0, -11.25], [132.25, -11.35], [132.32, -11.32], [132.35, -11.25], [132.25, -11.0], [132.47, -10.47], [133.0, -10.25], [133.25, -10.35], [133.5, -10.25], [134.03, -10.47], [134.18, -10.82], [134.53, -10.97], [134.68, -11.32], [135.03, -11.47], [135.25, -12.0], [135.03, -12.53], [134.68, -12.68], [134.65, -12.75], [134.75, -13.0], [134.53, -13.53], [134.0, -13.75], [133.47, -13.53], [133.32, -13.18], [132.97, -13.03], [132.82, -12.68], [132.75, -12.65], [132.5, -12.75], [132.25, -12.65], [132.0, -12.75]]]]}, "2025-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.25, -11.5], [131.35, -11.25], [131.25, -11.0], [131.47, -10.47], [132.0, -10.25], [132.25, -10.35], [132.5, -10.25], [132.75, -10.35], [133.0, -10.25], [133.25, -10.35], [133.5, -10.25], [134.03, -10.47], [134.18, -10.82], [134.53, -10.97], [134.68, -11.32], [134.75, -11.35], [135.0, -11.25], [135.53, -11.47], [135.75, -12.0], [135.53, -12.53], [135.18, -12.68], [135.03, -13.03], [134.68, -13.18], [134.53, -13.53], [134.0, -13.75], [133.47, -13.53], [133.32, -13.18], [132.97, -13.03], [132.82, -12.68], [132.75, -12.65], [132.5, -12.75], [132.25, -12.65], [132.0, -12.75], [131.47, -12.53], [131.25, -12.0], [131.35, -11.75], [131.25, -11.5]]]]}, "2025-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.25, -11.5], [131.35, -11.25], [131.25, -11.0], [131.47, -10.47], [132.0, -10.25], [132.25, -10.35], [132.5, -10.25], [132.75, -10.35], [133.0, -10.25], [133.25, -10.35], [133.5, -10.25], [134.03, -10.47], [134.18, -10.82], [134.53, -10.97], [134.68, -11.32], [134.75, -11.35], [135.0, -11.25], [135.53, -11.47], [135.75, -12.0], [135.53, -12.53], [135.18, -12.68], [135.03, -13.03], [134.68, -13.18], [134.53, -13.53], [134.0, -13.75], [133.47, -13.53], [133.32, -13.18], [132.97, -13.03], [132.82, -12.68], [132.75, -12.65], [132.5, -12.75], [132.25, -12.65], [132.0, -12.75], [131.47, -12.53], [131.25, -12.0], [131.35, -11.75], [131.25, -11.5]]]]}, "2025-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.25, -11.5], [131.35, -11.25], [131.25, -11.0], [131.47, -10.47], [132.0, -10.25], [132.25, -10.35], [132.5, -10.25], [133.03, -10.47], [133.25, -11.0], [133.15, -11.25], [133.2, -11.37], [133.5, -11.25], [133.75, -11.35], [134.0, -11.25], [134.25, -11.35], [134.5, -11.25], [134.75, -11.35], [135.0, -11.25], [135.53, -11.47], [135.75, -12.0], [135.53, -12.53], [135.18, -12.68], [135.03, -13.03], [134.68, -13.18], [134.53, -13.53], [134.0, -13.75], [133.47, -13.53], [133.32, -13.18], [132.97, -13.03], [132.8, -12.63], [132.5, -12.75], [132.25, -12.65], [132.0, -12.75], [131.47, -12.53], [131.25, -12.0], [131.35, -11.75], [131.25, -11.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.7299768015199106}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.4776140810735232}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.09555660429453, 25.898038991292367, 25.336736297607388, 26.027963075183663]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.848399098714196, 23.765198008219443, 22.926213836669945, 23.549255625406943]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.18564337751658, -1.4366721520857708, -1.9581333636708762, -1.1416171366167507]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.800026512317345, -2.187964560005753, -2.7299768015199106, -1.9283983543181193]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3814768928639876, -1.6916974260172792, -2.261307911147762, -1.2463442908021238]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6919833325955793, -2.005227964658322, -2.8543154016210153, -1.6949008791514912]}}