{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:53.979208", "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-Nov-30_to_2025-Dec-02_148.0_-36.0"}, "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": 2025110000854}, "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": "November 30 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 02 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": 181964.25466161538}, "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": -36.0}, "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": 148.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "148.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 145.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 149.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -30.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[144.47, -30.47], [144.82, -30.32], [144.97, -29.97], [145.5, -29.75], [146.03, -29.97], [146.18, -30.32], [146.53, -30.47], [146.68, -30.82], [147.03, -30.97], [147.18, -31.32], [147.53, -31.47], [147.68, -31.82], [147.75, -31.85], [148.0, -31.75], [148.53, -31.97], [148.68, -32.32], [148.75, -32.35], [149.0, -32.25], [149.53, -32.47], [149.68, -32.82], [150.03, -32.97], [150.25, -33.5], [150.15, -33.75], [150.25, -34.0], [150.15, -34.25], [150.25, -34.5], [150.03, -35.03], [149.68, -35.18], [149.53, -35.53], [149.18, -35.68], [149.15, -35.75], [149.25, -36.0], [149.03, -36.53], [148.68, -36.68], [148.53, -37.03], [148.0, -37.25], [147.75, -37.15], [147.5, -37.25], [147.25, -37.15], [147.18, -37.18], [147.03, -37.53], [146.5, -37.75], [146.25, -37.65], [146.0, -37.75], [145.47, -37.53], [145.25, -37.0], [145.35, -36.75], [145.25, -36.5], [145.47, -35.97], [145.82, -35.82], [145.85, -35.75], [145.75, -35.5], [145.85, -35.25], [145.75, -35.0], [145.85, -34.75], [145.82, -34.68], [145.75, -34.65], [145.5, -34.75], [144.97, -34.53], [144.75, -34.0], [144.85, -33.75], [144.75, -33.5], [144.96, -33.0], [144.75, -32.5], [144.85, -32.25], [144.75, -32.0], [144.85, -31.75], [144.82, -31.68], [144.47, -31.53], [144.25, -31.0], [144.47, -30.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia", "E.Australia", "S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.47, -31.53], [144.25, -31.0], [144.47, -30.47], [144.82, -30.32], [144.97, -29.97], [145.5, -29.75], [146.03, -29.97], [146.18, -30.32], [146.53, -30.47], [146.68, -30.82], [147.03, -30.97], [147.18, -31.32], [147.53, -31.47], [147.68, -31.82], [147.75, -31.85], [148.0, -31.75], [148.53, -31.97], [148.68, -32.32], [148.75, -32.35], [149.0, -32.25], [149.53, -32.47], [149.68, -32.82], [150.03, -32.97], [150.25, -33.5], [150.15, -33.75], [150.25, -34.0], [150.15, -34.25], [150.25, 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maximum t2m.", "value": [4.722901916503929, 3.9166961669922102, 7.890527343750023]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.082093598984481, -9.182009974354754, -5.99431413062825]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.424821617571013, -10.273496069350301, -7.2040348590155645]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5831604979611205, -2.512150674038072, -1.634313136988243]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4210143255629197, -2.9339408060793506, -2.06348005688631]}}