{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:14.732956", "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-Jul-01_to_2025-Jul-04_149.5_-23.0"}, "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": 2025070000043}, "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": "July 01 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 04 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": 51022.08332650937}, "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": -23.0}, "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": 149.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "149.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 148.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 151.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[147.47, -22.97], [148.0, -22.75], [148.25, -22.85], [148.32, -22.82], [148.47, -22.47], [148.82, -22.32], [148.97, -21.97], [149.5, -21.75], [149.75, -21.85], [150.0, -21.75], [150.53, -21.97], [150.68, -22.32], [151.03, -22.47], [151.25, -23.0], [151.15, -23.25], [151.18, -23.32], [151.25, -23.35], [151.5, -23.25], [152.03, -23.47], [152.25, -24.0], [152.03, -24.53], [151.5, -24.75], [151.25, -24.65], [151.18, -24.68], [151.03, -25.03], [150.5, -25.25], [150.25, -25.15], [150.0, -25.25], [149.47, -25.03], [149.25, -24.5], [149.35, -24.25], [149.32, -24.18], [149.25, -24.15], [149.0, -24.25], [148.75, -24.15], [148.5, -24.25], [148.25, -24.15], [148.0, -24.25], [147.47, -24.03], [147.25, -23.5], [147.47, -22.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.25, -23.0], [148.47, -22.47], [148.82, -22.32], [148.97, -21.97], [149.5, -21.75], [149.75, -21.85], [150.0, -21.75], [150.53, -21.97], [150.68, -22.32], [151.03, -22.47], [151.25, -23.0], [151.15, -23.25], [151.2, -23.37], [151.5, -23.25], [152.03, -23.47], [152.25, -24.0], [152.03, -24.53], [151.5, -24.75], [151.2, -24.62], [151.03, -25.03], [150.5, -25.25], [150.25, -25.15], [150.0, -25.25], [149.47, -25.03], [149.25, -24.5], [149.35, -24.25], [149.32, -24.18], [149.25, -24.15], [149.0, -24.25], [148.47, -24.03], [148.25, -23.5], [148.35, -23.25], [148.25, -23.0]]]]}, "2025-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.0, -24.25], [147.47, -24.03], [147.25, -23.5], [147.47, -22.97], [148.0, -22.75], [148.25, -22.85], [148.32, -22.82], [148.47, -22.47], [148.82, -22.32], [148.97, -21.97], [149.5, -21.75], [149.75, -21.85], [150.0, -21.75], [150.53, -21.97], [150.68, -22.32], [151.03, -22.47], [151.25, -23.0], [151.15, -23.25], [151.18, -23.32], [151.25, -23.35], [151.5, -23.25], [152.03, -23.47], [152.25, -24.0], [152.03, -24.53], [151.5, -24.75], [151.25, -24.65], [151.18, -24.68], [151.03, -25.03], [150.5, -25.25], [150.25, -25.15], [150.0, -25.25], [149.47, -25.03], [149.25, -24.5], [149.35, -24.25], [149.32, -24.18], [149.25, -24.15], [149.0, -24.25], [148.75, -24.15], [148.5, -24.25], [148.25, -24.15], [148.0, -24.25]]]]}, "2025-07-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.0, -24.25], [147.47, -24.03], [147.25, -23.5], [147.47, -22.97], [148.0, -22.75], [148.25, -22.85], [148.32, -22.82], [148.47, -22.47], [148.82, -22.32], [148.97, -21.97], [149.5, -21.75], [149.75, -21.85], [150.0, -21.75], [150.53, -21.97], [150.68, -22.32], [151.03, -22.47], [151.25, -23.0], [151.15, -23.25], [151.18, -23.32], [151.25, -23.35], [151.5, -23.25], [152.03, -23.47], [152.25, -24.0], [152.03, -24.53], [151.5, -24.75], [151.25, -24.65], [151.18, -24.68], [151.03, -25.03], [150.5, -25.25], [150.25, -25.15], [150.0, -25.25], [149.47, -25.03], [149.25, -24.5], [149.35, -24.25], [149.32, -24.18], [149.25, -24.15], [149.0, -24.25], [148.75, -24.15], [148.5, -24.25], [148.25, -24.15], [148.0, -24.25]]]]}, "2025-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.0, -24.25], [147.47, -24.03], [147.25, -23.5], [147.47, -22.97], [148.0, -22.75], [148.25, -22.85], [148.32, -22.82], [148.47, -22.47], [149.0, -22.25], [149.25, -22.35], [149.5, -22.25], [150.03, -22.47], [150.18, -22.82], [150.25, -22.85], [150.5, -22.75], [151.03, -22.97], [151.18, -23.32], [151.25, -23.35], [151.5, -23.25], [152.03, -23.47], [152.25, -24.0], [152.03, -24.53], [151.5, -24.75], [151.25, -24.65], [151.0, -24.75], [150.7, -24.62], [150.53, -25.03], [150.0, -25.25], [149.47, -25.03], [149.25, -24.5], [149.35, -24.25], [149.32, -24.18], [149.25, -24.15], [149.0, -24.25], [148.75, -24.15], [148.5, -24.25], [148.25, -24.15], [148.0, -24.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.503848487252469}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.148192384931534}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.500928836398714, 11.540459639937865, 11.830532328287859, 12.588564385308189]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.137479400634788, 10.469166056315146, 11.15857594807943, 11.28913269042971]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.671602791846639, -4.601342275383852, -4.427610413526363, -3.645077497716931]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.166341490672039, -5.503848487252469, -5.243307826933403, -4.1518396654947765]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5204590754912692, -1.939965149373647, -1.9340231796547462, -1.5418667870864657]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6698612380102145, -2.2261241412085977, -2.296085814374286, -1.7430546664937547]}}