{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:25.281697", "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-14_to_2025-Apr-17_143.5_-20.5"}, "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": 2025040000395}, "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 14 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 17 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": 74868.76320736381}, "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": -20.5}, "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": 143.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "143.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 143.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 146.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[142.97, -19.97], [143.5, -19.75], [143.75, -19.85], [144.0, -19.75], [144.53, -19.97], [144.68, -20.32], [144.75, -20.35], [144.82, -20.32], [144.97, -19.97], [145.32, -19.82], [145.47, -19.47], [146.0, -19.25], [146.25, -19.35], [146.5, -19.25], [147.03, -19.47], [147.25, -20.0], [147.03, -20.53], [146.68, -20.68], [146.53, -21.03], [146.18, -21.18], [146.15, -21.25], [146.18, -21.32], [146.53, -21.47], [146.75, -22.0], [146.53, -22.53], [146.0, -22.75], [145.75, -22.65], [145.68, -22.68], [145.53, -23.03], [145.0, -23.25], [144.75, -23.15], [144.5, -23.25], [143.97, -23.03], [143.82, -22.68], [143.75, -22.65], [143.5, -22.75], [142.97, -22.53], [142.82, -22.18], [142.47, -22.03], [142.25, -21.5], [142.35, -21.25], [142.25, -21.0], [142.47, -20.47], [142.82, -20.32], [142.97, -19.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia", "C.Australia", "E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.25, -21.0], [142.47, -20.47], [142.82, -20.32], [142.97, -19.97], [143.5, -19.75], [143.75, -19.85], [144.0, -19.75], [144.53, -19.97], [144.68, -20.32], [144.75, -20.35], [145.0, -20.25], [145.53, -20.47], [145.68, -20.82], [146.03, -20.97], [146.18, -21.32], [146.53, -21.47], [146.75, -22.0], [146.53, -22.53], [146.0, -22.75], [145.75, -22.65], [145.68, -22.68], [145.53, -23.03], [145.0, -23.25], [144.75, -23.15], [144.5, -23.25], [143.97, -23.03], [143.82, -22.68], [143.75, -22.65], [143.5, -22.75], [142.97, -22.53], [142.82, -22.18], [142.47, -22.03], [142.25, -21.5], [142.35, -21.25], [142.25, -21.0]]]]}, "2025-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.25, -21.0], [142.47, -20.47], [142.82, -20.32], [142.97, -19.97], [143.5, -19.75], [143.75, -19.85], [144.0, -19.75], [144.53, -19.97], [144.68, -20.32], [144.75, -20.35], [144.82, -20.32], [144.97, -19.97], [145.32, 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[144.75, -22.65], [144.5, -22.75], [143.97, -22.53], [143.82, -22.18], [143.47, -22.03], [143.32, -21.68], [143.25, -21.65], [143.0, -21.75], [142.47, -21.53], [142.25, -21.0], [142.47, -20.47], [142.82, -20.32], [142.97, -19.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.5460231597863867}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5462525420496283}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.118397558303116, 22.162379494691493, 21.73109784248544, 21.922140587700767]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.32938156127932, 20.87146402994796, 20.658347066243493, 20.360115305582724]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6031616891316416, -2.324878565565351, -2.7514179307297124, -2.5032709417266688]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.253499381466895, -2.663619209906699, -3.3932426095790333, -3.5460231597863867]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.396560737446295, -1.3027859734434617, -1.620033901164328, -1.5233263281064062]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6780497146276268, -1.5210611622635104, -1.9304281972445072, -2.094059042940828]}}