{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:55:07.178509", "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-24_to_2025-Apr-26_117.0_-30.5"}, "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": 2025040000503}, "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 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 26 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": 53252.04501511777}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Australia"]}, "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": ["Indian Ocean"]}, "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": -30.5}, "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": 117.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, -29.47], [115.0, -29.25], [115.53, -29.47], [115.68, -29.82], [115.75, -29.85], [115.82, -29.82], [115.97, -29.47], [116.5, -29.25], [116.75, -29.35], [117.0, -29.25], [117.25, -29.35], [117.5, -29.25], [117.75, -29.35], [118.0, -29.25], [118.25, -29.35], [118.5, -29.25], [119.03, -29.47], [119.25, -30.0], [119.15, -30.25], [119.25, -30.5], [119.03, -31.03], [118.5, -31.25], [118.25, -31.15], [118.18, -31.18], [118.03, -31.53], [117.5, -31.75], [117.25, -31.65], [117.18, -31.68], [117.03, -32.03], [116.5, -32.25], [115.97, -32.03], [115.82, -31.68], [115.75, -31.65], [115.5, -31.75], [114.97, -31.53], [114.82, -31.18], [114.47, -31.03], [114.25, -30.5], [114.35, -30.25], [114.25, -30.0], [114.47, -29.47]]]]}, "2025-04-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, -29.47], [115.0, -29.25], [115.53, -29.47], [115.68, -29.82], [115.75, -29.85], [115.82, -29.82], [115.97, -29.47], [116.5, -29.25], [116.75, -29.35], [117.0, -29.25], [117.25, -29.35], [117.5, -29.25], [117.75, -29.35], [118.0, -29.25], [118.25, -29.35], [118.5, -29.25], [119.03, -29.47], [119.25, -30.0], [119.15, -30.25], [119.25, -30.5], [119.03, -31.03], [118.5, -31.25], [118.25, -31.15], [118.18, -31.18], [118.03, -31.53], [117.5, -31.75], [117.25, -31.65], [117.18, -31.68], [117.03, -32.03], [116.5, -32.25], [115.97, -32.03], [115.82, -31.68], [115.75, -31.65], [115.5, -31.75], [114.97, -31.53], [114.82, -31.18], [114.47, -31.03], [114.25, -30.5], [114.35, -30.25], [114.25, -30.0], [114.47, -29.47]]]]}, "2025-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, -29.47], [115.0, -29.25], [115.53, -29.47], [115.68, -29.82], [115.75, -29.85], [115.82, -29.82], [115.97, -29.47], [116.5, -29.25], [116.75, -29.35], [117.0, -29.25], [117.25, -29.35], [117.5, -29.25], [117.75, -29.35], [118.0, -29.25], [118.25, -29.35], [118.5, -29.25], [119.03, -29.47], [119.25, -30.0], [119.15, -30.25], [119.25, -30.5], [119.03, -31.03], [118.5, -31.25], [118.25, -31.15], [118.18, -31.18], [118.03, -31.53], [117.5, -31.75], [117.25, -31.65], [117.18, -31.68], [117.03, -32.03], [116.5, -32.25], [115.97, -32.03], [115.82, -31.68], [115.75, -31.65], [115.5, -31.75], [114.97, -31.53], [114.82, -31.18], [114.47, -31.03], [114.25, -30.5], [114.35, -30.25], [114.25, -30.0], [114.47, -29.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.016110942188504}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.327147290607523}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.940778350830044, 14.39105784098308, 13.73369445800779]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.709536488850915, 13.431886291503929, 12.66534322102865]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9348620386389768, -4.28378437060785, -4.762795462575741]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.804703561292115, -5.257333658864866, -6.016110942188504]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3998278745936674, -1.5235487080442556, -1.708377909031324]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5461705812000845, -1.6931553468414515, -1.8815886150728387]}}