{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:28.087973", "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-22_to_2025-Apr-24_146.5_-21.5"}, "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": 2025040000544}, "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 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 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": 132045.07130007184}, "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": -21.5}, "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": 146.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "146.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 143.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 149.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.0}, "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": [[[[143.97, -20.97], [144.5, -20.75], [144.75, -20.85], [144.82, -20.82], [144.85, -20.75], [144.75, -20.5], [144.97, -19.97], [145.32, -19.82], [145.47, -19.47], [146.0, -19.25], [146.53, -19.47], [146.68, -19.82], [146.75, -19.85], [147.0, -19.75], [147.25, -19.85], [147.5, -19.75], [148.03, -19.97], [148.18, -20.32], [148.53, -20.47], [148.7, -20.87], [149.0, -20.75], [149.53, -20.97], [149.75, -21.5], [149.65, -21.75], [149.75, -22.0], [149.65, -22.25], [149.75, -22.5], [149.65, -22.75], [149.75, -23.0], [149.53, -23.53], [149.0, -23.75], [148.47, -23.53], [148.32, -23.18], [148.25, -23.15], [148.0, -23.25], [147.75, -23.15], [147.68, -23.18], [147.53, -23.53], [147.0, -23.75], [146.47, -23.53], [146.32, -23.18], [146.2, -23.12], [146.03, -23.53], [145.5, -23.75], [145.25, -23.65], [145.0, -23.75], [144.47, -23.53], [144.32, -23.18], [144.0, -23.04], [143.5, -23.25], [142.97, -23.03], [142.75, -22.5], [142.97, -21.97], [143.32, -21.82], [143.47, -21.47], [143.82, -21.32], [143.97, -20.97]]]]}}, "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": {"2025-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.47, -21.47], [143.82, -21.32], [143.97, -20.97], [144.5, -20.75], [144.75, -20.85], [144.82, -20.82], [144.85, -20.75], [144.75, -20.5], [144.97, -19.97], [145.32, -19.82], [145.47, -19.47], [146.0, -19.25], [146.53, -19.47], [146.68, -19.82], [146.75, -19.85], [147.0, -19.75], [147.25, -19.85], [147.5, -19.75], [148.03, -19.97], [148.18, -20.32], [148.53, -20.47], [148.7, -20.87], [149.0, -20.75], [149.53, -20.97], [149.75, -21.5], [149.65, -21.75], [149.75, -22.0], [149.65, -22.25], [149.75, -22.5], [149.65, -22.75], [149.75, -23.0], [149.53, -23.53], [149.0, -23.75], [148.47, -23.53], [148.32, -23.18], [148.25, -23.15], [148.0, -23.25], [147.75, -23.15], [147.68, -23.18], [147.53, -23.53], [147.0, -23.75], [146.47, -23.53], [146.32, -23.18], [146.2, -23.12], [146.03, -23.53], [145.5, -23.75], [145.25, -23.65], [145.0, -23.75], [144.47, -23.53], [144.32, -23.18], [144.0, -23.04], [143.5, -23.25], [142.97, -23.03], [142.75, -22.5], [142.97, -21.97], [143.32, -21.82], [143.47, -21.47]]]]}, "2025-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.47, -21.47], [143.82, -21.32], [143.97, -20.97], [144.5, -20.75], [144.75, -20.85], [144.82, -20.82], [144.85, -20.75], [144.75, -20.5], [144.97, -19.97], [145.32, -19.82], [145.47, -19.47], [146.0, -19.25], [146.53, -19.47], [146.68, -19.82], [146.75, -19.85], [147.0, -19.75], [147.25, -19.85], [147.5, -19.75], [148.03, -19.97], [148.18, -20.32], [148.53, -20.47], [148.7, -20.87], [149.0, -20.75], [149.53, -20.97], [149.75, -21.5], [149.65, -21.75], [149.75, -22.0], [149.65, -22.25], [149.75, -22.5], [149.65, -22.75], [149.75, -23.0], [149.53, -23.53], [149.0, -23.75], [148.47, -23.53], [148.32, -23.18], [148.25, -23.15], [148.0, -23.25], [147.75, -23.15], [147.68, -23.18], [147.53, -23.53], [147.0, -23.75], [146.47, -23.53], [146.32, -23.18], [146.2, -23.12], [146.03, -23.53], [145.5, -23.75], [145.25, -23.65], [145.0, -23.75], [144.47, -23.53], [144.32, -23.18], [144.0, -23.04], [143.5, -23.25], [142.97, -23.03], [142.75, -22.5], [142.97, -21.97], [143.32, -21.82], [143.47, -21.47]]]]}, "2025-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.47, -21.47], [143.82, -21.32], [143.97, -20.97], [144.5, -20.75], [144.75, -20.85], [144.82, -20.82], [144.85, -20.75], [144.75, -20.5], [144.97, -19.97], [145.32, -19.82], [145.47, -19.47], [146.0, -19.25], [146.53, -19.47], [146.68, -19.82], [146.75, -19.85], [147.0, -19.75], [147.25, -19.85], [147.5, -19.75], [148.03, -19.97], [148.18, -20.32], [148.53, -20.47], [148.7, -20.87], [149.0, -20.75], [149.53, -20.97], [149.75, -21.5], [149.65, -21.75], [149.75, -22.0], [149.65, -22.25], [149.75, -22.5], [149.65, -22.75], [149.75, -23.0], [149.53, -23.53], [149.0, -23.75], [148.47, -23.53], [148.32, -23.18], [148.25, -23.15], [148.0, -23.25], [147.75, -23.15], [147.68, -23.18], [147.53, -23.53], [147.0, -23.75], [146.47, -23.53], [146.32, -23.18], [146.2, -23.12], [146.03, -23.53], [145.5, -23.75], [145.25, -23.65], [145.0, -23.75], [144.47, -23.53], [144.32, -23.18], [144.0, -23.04], [143.5, -23.25], [142.97, -23.03], [142.75, -22.5], [142.97, -21.97], [143.32, -21.82], [143.47, -21.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.354772303369259}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.75635442502401}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.48001870417943, 18.36525768335315, 19.55625509732016]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.794770812988304, 16.893116251627646, 18.312156931559286]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.603917115102647, -4.516218817745732, -3.1489273422236517]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.354772303369259, -5.320478424211046, -4.1148999887089985]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0178198223577213, -2.4804508454337046, -1.6206813303637724]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4597138153884357, -3.2121330226578806, -2.053592777240276]}}