{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:51.526849", "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-Sep-06_to_2025-Sep-09_115.0_-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": 2025090000190}, "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": "September 06 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 09 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": 116118.2809972427}, "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": ["C.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": []}, "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": 115.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 113.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 119.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.85, -26.25], [113.75, -26.0], [113.85, -25.75], [113.75, -25.5], [113.97, -24.97], [114.5, -24.75], [114.75, -24.85], [115.0, -24.75], [115.25, -24.85], [115.5, -24.75], [116.03, -24.97], [116.18, -25.32], [116.25, -25.35], [116.32, -25.32], [116.47, -24.97], [117.0, -24.75], [117.25, -24.85], [117.5, -24.75], [118.03, -24.97], [118.18, -25.32], [118.53, -25.47], [118.68, -25.82], [118.75, -25.85], [119.0, -25.75], [119.25, -25.85], [119.5, -25.75], [120.03, -25.97], [120.25, -26.5], [120.15, -26.75], [120.25, -27.0], [120.03, -27.53], [119.5, -27.75], [119.25, -27.65], [119.0, -27.75], [118.75, -27.65], [118.5, -27.75], [118.25, -27.65], [118.18, -27.68], [118.03, -28.03], [117.5, -28.25], [117.25, -28.15], [117.0, -28.25], [116.75, -28.15], [116.5, -28.25], [116.25, -28.15], [116.0, -28.25], [115.75, -28.15], [115.5, -28.25], [114.97, -28.03], [114.82, -27.68], [114.75, -27.65], [114.5, -27.75], [113.97, -27.53], [113.75, -27.0], [113.85, -26.75], [113.75, -26.5], [113.85, -26.25]]]]}, "2025-09-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, -26.5], [113.47, -25.97], [113.82, -25.82], [113.85, -25.75], [113.75, -25.5], [113.97, -24.97], [114.5, -24.75], [114.75, -24.85], [115.0, -24.75], [115.25, -24.85], [115.5, -24.75], [116.03, -24.97], [116.18, -25.32], [116.25, -25.35], [116.32, -25.32], [116.47, -24.97], [117.0, -24.75], [117.25, -24.85], [117.5, -24.75], [118.03, -24.97], [118.18, -25.32], [118.53, -25.47], [118.68, -25.82], [118.75, -25.85], [119.0, -25.75], [119.25, -25.85], [119.5, -25.75], [120.03, -25.97], [120.25, -26.5], [120.15, -26.75], [120.25, -27.0], [120.03, -27.53], [119.5, -27.75], [119.25, -27.65], [119.0, -27.75], [118.75, -27.65], [118.68, -27.68], [118.53, -28.03], [118.0, -28.25], [117.75, -28.15], [117.5, -28.25], [117.25, -28.15], [117.0, -28.25], [116.75, -28.15], [116.5, -28.25], [116.25, -28.15], [116.0, -28.25], [115.75, -28.15], [115.5, -28.25], [114.97, -28.03], [114.82, -27.68], [114.75, -27.65], [114.5, -27.75], [113.97, -27.53], [113.82, -27.18], [113.47, -27.03], [113.25, -26.5]]]]}, "2025-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, -26.5], [113.47, -25.97], [113.82, -25.82], [113.85, -25.75], [113.75, -25.5], [113.97, -24.97], [114.5, -24.75], [114.75, -24.85], [115.0, -24.75], [115.25, -24.85], [115.5, -24.75], [116.03, -24.97], [116.18, -25.32], [116.25, -25.35], [116.32, -25.32], [116.47, -24.97], [117.0, -24.75], [117.25, -24.85], [117.5, -24.75], [118.03, -24.97], [118.18, -25.32], [118.53, -25.47], [118.68, -25.82], [118.75, -25.85], [119.0, -25.75], [119.25, -25.85], [119.5, -25.75], [120.03, -25.97], [120.25, -26.5], [120.15, -26.75], [120.25, -27.0], [120.03, -27.53], [119.5, -27.75], [119.25, -27.65], [119.0, -27.75], [118.75, -27.65], [118.68, -27.68], [118.53, -28.03], [118.0, -28.25], [117.75, -28.15], [117.5, -28.25], [117.25, -28.15], [117.0, -28.25], [116.75, -28.15], [116.5, -28.25], [116.25, -28.15], [116.0, -28.25], [115.75, -28.15], [115.5, -28.25], [114.97, -28.03], [114.82, -27.68], [114.75, -27.65], [114.5, -27.75], [113.97, -27.53], [113.82, -27.18], [113.47, -27.03], [113.25, -26.5]]]]}, "2025-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, -26.5], [113.47, -25.97], [113.82, -25.82], [113.97, -25.47], [114.5, -25.25], [114.75, -25.35], [115.0, -25.25], [115.25, -25.35], [115.5, -25.25], [115.75, -25.35], [116.0, -25.25], [116.25, -25.35], [116.5, -25.25], [117.03, -25.47], [117.18, -25.82], [117.25, -25.85], [117.5, -25.75], [117.75, -25.85], [118.0, -25.75], [118.25, -25.85], [118.5, -25.75], [118.75, -25.85], [119.0, -25.75], [119.25, -25.85], [119.5, -25.75], [120.03, -25.97], [120.25, -26.5], [120.15, -26.75], [120.25, -27.0], [120.03, -27.53], [119.5, -27.75], [119.25, -27.65], [119.0, -27.75], [118.75, -27.65], [118.68, -27.68], [118.53, -28.03], [118.0, -28.25], [117.75, -28.15], [117.5, -28.25], [117.25, -28.15], [117.0, -28.25], [116.75, -28.15], [116.5, -28.25], [116.25, -28.15], [116.0, -28.25], [115.75, -28.15], [115.5, -28.25], [114.97, -28.03], [114.82, -27.68], [114.75, -27.65], [114.5, -27.75], [113.97, -27.53], [113.82, -27.18], [113.47, -27.03], [113.25, -26.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.771043682897471}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.312927793642013}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.373826853434252, 13.523345777723534, 13.482239811004092, 13.625809792911355]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.212710316975915, 12.407690938313806, 11.04505564371749, 11.767363484700525]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.2016845920266, -4.2410752885445975, -4.492348056378539, -4.3109243302235924]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.206333890506073, -5.234934210392396, -5.771043682897471, -5.159649957865554]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5189854424374278, -1.5522242138598823, -1.6001772588888878, -1.5151113448331208]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.836253220217085, -1.828666790477537, -1.9480229701134593, -1.7580583581423188]}}