{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:23.324126", "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-Apr-23_to_2024-Apr-27_134.5_-33.5"}, "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": 2024040000500}, "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 23 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 27 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 59943.17427121406}, "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": -33.5}, "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": 134.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "134.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 129.0}, "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": -34.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[135.18, -33.32], [135.53, -33.47], [135.75, -34.0], [135.53, -34.53], [135.0, -34.75], [134.47, -34.53], [134.32, -34.18], [134.25, -34.15], [134.0, -34.25], [133.47, -34.03], [133.32, -33.68], [133.25, -33.65], [133.0, -33.75], [132.47, -33.53], [132.32, -33.18], [132.25, -33.15], [132.0, -33.25], [131.75, -33.15], [131.5, -33.25], [130.97, -33.03], [130.82, -32.68], [130.75, -32.65], [130.5, -32.75], [130.25, -32.65], [130.0, -32.75], [129.75, -32.65], [129.5, -32.75], [129.25, -32.65], [129.0, -32.75], [128.47, -32.53], [128.25, -32.0], [128.47, -31.47], [129.0, -31.25], [129.25, -31.35], [129.5, -31.25], [129.75, -31.35], [130.0, -31.25], [130.25, -31.35], [130.5, -31.25], [130.75, -31.35], [131.0, -31.25], [131.25, -31.35], [131.5, -31.25], [131.75, -31.35], [132.0, -31.25], [132.25, -31.35], [132.5, -31.25], [132.75, -31.35], [133.0, -31.25], [133.25, -31.35], [133.5, -31.25], [134.03, -31.47], [134.18, -31.82], [134.53, -31.97], [134.68, -32.32], [135.03, -32.47], [135.25, -33.0], [135.15, -33.25], [135.18, -33.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.0, -32.75], [128.47, -32.53], [128.25, -32.0], [128.47, -31.47], [129.0, -31.25], [129.25, -31.35], [129.5, -31.25], [129.75, -31.35], [130.0, -31.25], [130.25, -31.35], [130.5, -31.25], [130.75, -31.35], [131.0, -31.25], [131.25, -31.35], [131.5, -31.25], [132.03, -31.47], [132.18, -31.82], [132.25, -31.85], [132.5, -31.75], [132.75, -31.85], [133.0, -31.75], [133.25, -31.85], [133.5, -31.75], [134.03, -31.97], [134.18, -32.32], [134.53, -32.47], [134.68, -32.82], [135.03, -32.97], [135.18, -33.32], [135.53, -33.47], [135.75, -34.0], [135.53, -34.53], [135.0, -34.75], [134.47, -34.53], [134.32, -34.18], [134.25, -34.15], [134.0, -34.25], [133.47, -34.03], [133.32, -33.68], [133.25, -33.65], [133.0, -33.75], [132.47, -33.53], 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amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.3290694327661323}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.12794616183845, 15.394868875298357, 15.352899296486385, 15.07646391472656, 14.956359671606265]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.88933591157081, 13.087009668256371, 13.12797522306272, 13.213227864146177, 14.845918750202657]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9640891369919753, -2.4856684605171635, -2.3846155534492492, -2.4488046293736883, -1.734513175474433]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.404638079064455, -3.7113865186618114, -3.511826375388921, -3.127450892240631, -1.7517029830701745]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.330006614497967, -1.467337080751913, -1.4701559548548624, -1.5316478209652156, -1.1712903635282865]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5194561388754004, -1.6781041706686988, -1.8387705027291545, -1.9289478738391928, -1.1938583010563613]}}