{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:54.345586", "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": "2024-Jan-03_to_2024-Jan-05_123.0_-26.5"}, "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": 2024010000119}, "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": "January 03 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 05 2024"}, "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": 57872.536001613895}, "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": -26.5}, "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": 123.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "123.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 121.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 125.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -26.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.47, -25.97], [122.0, -25.75], [122.25, -25.85], [122.5, -25.75], [122.75, -25.85], [122.82, -25.82], [122.97, -25.47], [123.5, -25.25], [124.03, -25.47], [124.18, -25.82], [124.25, -25.85], [124.5, -25.75], [124.75, -25.85], [125.0, -25.75], [125.53, -25.97], [125.75, -26.5], [125.65, -26.75], [125.75, -27.0], [125.65, -27.25], [125.75, -27.5], [125.53, -28.03], [125.0, -28.25], [124.75, -28.15], [124.5, -28.25], [124.25, -28.15], [124.0, -28.25], [123.47, -28.03], [123.32, -27.68], [123.25, -27.65], [123.0, -27.75], [122.7, -27.62], [122.53, -28.03], [122.0, -28.25], [121.75, -28.15], [121.5, -28.25], [121.25, -28.15], [121.0, -28.25], [120.47, -28.03], [120.25, -27.5], [120.47, -26.97], [120.82, -26.82], [120.97, -26.47], [121.32, -26.32], [121.47, -25.97]]]]}}, "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": {"2024-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.97, -26.47], [121.32, -26.32], [121.47, -25.97], [122.0, -25.75], [122.25, -25.85], [122.5, -25.75], [122.75, -25.85], [122.82, -25.82], [122.97, -25.47], [123.5, -25.25], [124.03, -25.47], [124.18, -25.82], [124.25, -25.85], [124.5, -25.75], [124.75, -25.85], [125.0, -25.75], [125.53, -25.97], [125.75, -26.5], [125.65, -26.75], [125.75, -27.0], [125.65, -27.25], [125.75, -27.5], [125.53, -28.03], [125.0, -28.25], [124.75, -28.15], [124.5, -28.25], [124.25, -28.15], [124.0, -28.25], [123.47, -28.03], [123.32, -27.68], [123.25, -27.65], [123.0, -27.75], [122.7, -27.62], [122.53, -28.03], [122.0, -28.25], [121.75, -28.15], [121.5, -28.25], [121.25, -28.15], [121.0, -28.25], [120.47, -28.03], [120.25, -27.5], [120.47, -26.97], [120.82, -26.82], [120.97, -26.47]]]]}, "2024-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.97, -26.47], [121.32, -26.32], [121.47, -25.97], [122.0, -25.75], [122.25, -25.85], [122.5, -25.75], [122.75, -25.85], [122.82, -25.82], [122.97, -25.47], [123.5, -25.25], [124.03, -25.47], [124.18, -25.82], [124.25, -25.85], [124.5, -25.75], [124.75, -25.85], [125.0, -25.75], [125.53, -25.97], [125.75, -26.5], [125.65, -26.75], [125.75, -27.0], [125.65, -27.25], [125.75, -27.5], [125.53, -28.03], [125.0, -28.25], [124.75, -28.15], [124.5, -28.25], [124.25, -28.15], [124.0, -28.25], [123.47, -28.03], [123.32, -27.68], [123.25, -27.65], [123.0, -27.75], [122.7, -27.62], [122.53, -28.03], [122.0, -28.25], [121.75, -28.15], [121.5, -28.25], [121.25, -28.15], [121.0, -28.25], [120.47, -28.03], [120.25, -27.5], [120.47, -26.97], [120.82, -26.82], [120.97, -26.47]]]]}, "2024-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[120.97, -26.47], [121.32, -26.32], [121.47, -25.97], [122.0, -25.75], [122.25, -25.85], [122.5, -25.75], [122.75, -25.85], [122.82, -25.82], [122.97, -25.47], [123.5, -25.25], [124.03, -25.47], [124.18, -25.82], [124.25, -25.85], [124.5, -25.75], [124.75, -25.85], [125.0, -25.75], [125.53, -25.97], [125.75, -26.5], [125.65, -26.75], [125.75, -27.0], [125.65, -27.25], [125.75, -27.5], [125.53, -28.03], [125.0, -28.25], [124.75, -28.15], [124.5, -28.25], [124.25, -28.15], [124.0, -28.25], [123.47, -28.03], [123.32, -27.68], [123.25, -27.65], [123.0, -27.75], [122.7, -27.62], [122.53, -28.03], [122.0, -28.25], [121.75, -28.15], [121.5, -28.25], [121.25, -28.15], [121.0, -28.25], [120.47, -28.03], [120.25, -27.5], [120.47, -26.97], [120.82, -26.82], [120.97, -26.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.076323115273055}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.070685921925516}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.15278545795354, 22.66201614868885, 23.94501248227232]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.926998001761547, 21.339748966313152, 22.179633407659082]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.269408341302605, -7.701800180499181, -6.240849243974759]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.18819476952217, -9.076323115273055, -7.703202028353758]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7365831735106654, -1.842917432470646, -1.5343019040021073]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9266895923585794, -2.199187954771265, -1.9107355866154414]}}