{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:39.147884", "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": "2023-Dec-25_to_2023-Dec-29_115.5_-25.5"}, "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": 2023120000475}, "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": "December 25 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 29 2023"}, "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": 123678.47301225143}, "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": -25.5}, "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": 115.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 117.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[113.75, -25.0], [113.85, -24.75], [113.75, -24.5], [113.85, -24.25], [113.75, -24.0], [113.85, -23.75], [113.75, -23.5], [113.85, -23.25], [113.75, -23.0], [113.97, -22.47], [114.32, -22.32], [114.47, -21.97], [115.0, -21.75], [115.25, -21.85], [115.5, -21.75], [115.75, -21.85], [116.0, -21.75], [116.53, -21.97], [116.68, -22.32], [117.03, -22.47], [117.25, -23.0], [117.15, -23.25], [117.25, -23.5], [117.15, -23.75], [117.18, -23.82], [117.53, -23.97], [117.75, -24.5], [117.65, -24.75], [117.75, -25.0], [117.53, -25.53], [117.18, -25.68], [117.15, -25.75], [117.25, -26.0], [117.03, -26.53], [116.68, -26.68], [116.53, -27.03], [116.0, -27.25], [115.75, -27.15], [115.5, -27.25], [115.25, -27.15], [115.0, -27.25], [114.75, -27.15], [114.5, -27.25], [113.97, -27.03], [113.75, -26.5], [113.85, -26.25], [113.75, -26.0], [113.85, -25.75], [113.75, -25.5], [113.85, -25.25], [113.75, -25.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.97, -23.53], [113.75, -23.0], [113.97, -22.47], [114.32, -22.32], [114.47, -21.97], [115.0, -21.75], [115.25, -21.85], [115.5, -21.75], [115.75, -21.85], [116.0, -21.75], [116.53, -21.97], [116.75, -22.5], [116.65, -22.75], [116.75, -23.0], [116.53, -23.53], [116.18, -23.68], [116.15, -23.75], [116.18, -23.82], [116.53, -23.97], [116.75, -24.5], [116.65, -24.75], [116.75, -25.0], [116.65, -25.25], [116.75, -25.5], [116.53, -26.03], [116.18, -26.18], [116.03, -26.53], [115.5, -26.75], [114.97, -26.53], [114.82, -26.18], [114.47, -26.03], [114.25, -25.5], [114.47, -24.97], [114.82, -24.82], [114.85, -24.75], [114.82, -24.68], [114.47, -24.53], [114.25, -24.0], [114.35, -23.75], [114.32, -23.68], [113.97, -23.53]]]]}, "2023-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, -26.0], [113.85, -25.75], [113.75, -25.5], [113.85, -25.25], [113.75, -25.0], [113.85, -24.75], [113.75, -24.5], [113.85, -24.25], [113.75, -24.0], [113.85, -23.75], [113.75, -23.5], [113.85, -23.25], [113.75, -23.0], [113.97, -22.47], [114.32, -22.32], [114.47, -21.97], [115.0, -21.75], [115.25, -21.85], [115.5, -21.75], [115.75, -21.85], [116.0, -21.75], [116.53, -21.97], [116.68, -22.32], [117.03, -22.47], [117.25, -23.0], [117.15, -23.25], [117.25, -23.5], [117.15, -23.75], [117.18, -23.82], [117.53, -23.97], [117.75, -24.5], [117.65, -24.75], [117.75, -25.0], [117.53, -25.53], [117.18, -25.68], [117.15, -25.75], [117.25, -26.0], [117.03, -26.53], [116.68, -26.68], [116.53, -27.03], [116.0, -27.25], [115.75, -27.15], [115.5, -27.25], [115.25, -27.15], [115.0, -27.25], [114.75, -27.15], [114.5, -27.25], [113.97, -27.03], [113.75, -26.5], [113.85, -26.25], [113.75, -26.0]]]]}, "2023-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, -26.0], [113.85, -25.75], [113.75, -25.5], [113.85, -25.25], [113.75, -25.0], [113.85, -24.75], [113.75, -24.5], [113.85, -24.25], [113.75, -24.0], [113.85, -23.75], [113.75, -23.5], [113.85, -23.25], [113.75, -23.0], [113.97, -22.47], [114.32, -22.32], [114.47, -21.97], [115.0, -21.75], [115.25, -21.85], [115.5, -21.75], [115.75, -21.85], [116.0, -21.75], [116.53, -21.97], [116.68, -22.32], [117.03, -22.47], [117.25, -23.0], [117.15, -23.25], [117.25, -23.5], [117.15, -23.75], [117.18, -23.82], [117.53, -23.97], [117.75, -24.5], [117.65, -24.75], [117.75, -25.0], [117.53, -25.53], [117.18, -25.68], [117.15, -25.75], [117.25, -26.0], [117.03, -26.53], [116.68, -26.68], [116.53, -27.03], [116.0, -27.25], [115.75, -27.15], [115.5, -27.25], [115.25, -27.15], [115.0, -27.25], [114.75, -27.15], [114.5, -27.25], [113.97, -27.03], [113.75, -26.5], [113.85, -26.25], [113.75, -26.0]]]]}, "2023-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, -26.0], [113.85, -25.75], [113.75, -25.5], [113.85, -25.25], [113.75, -25.0], [113.85, -24.75], [113.75, -24.5], [113.85, -24.25], [113.75, -24.0], [113.85, -23.75], [113.75, -23.5], [113.85, -23.25], [113.75, -23.0], [113.97, -22.47], [114.32, -22.32], [114.47, -21.97], [115.0, -21.75], [115.25, -21.85], [115.5, -21.75], [115.75, -21.85], [116.0, -21.75], [116.53, -21.97], [116.68, -22.32], [117.03, -22.47], [117.25, -23.0], [117.15, -23.25], [117.25, -23.5], [117.15, -23.75], [117.18, -23.82], [117.53, -23.97], [117.75, -24.5], [117.65, -24.75], [117.75, -25.0], [117.53, -25.53], [117.18, -25.68], [117.15, -25.75], [117.25, -26.0], [117.03, -26.53], [116.68, -26.68], [116.53, -27.03], [116.0, -27.25], [115.75, -27.15], [115.5, -27.25], [115.25, -27.15], [115.0, -27.25], [114.75, -27.15], [114.5, -27.25], [113.97, -27.03], [113.75, -26.5], [113.85, -26.25], [113.75, -26.0]]]]}, "2023-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.35, -25.25], [114.25, -25.0], [114.35, -24.75], [114.25, -24.5], [114.47, -23.97], [115.0, -23.75], [115.25, -23.85], [115.5, -23.75], [116.03, -23.97], [116.18, -24.32], [116.53, -24.47], [116.75, -25.0], [116.65, -25.25], [116.75, -25.5], [116.53, -26.03], [116.18, -26.18], [116.03, -26.53], [115.5, -26.75], [115.25, -26.65], [115.0, -26.75], [114.47, -26.53], [114.25, -26.0], [114.35, -25.75], [114.25, -25.5], [114.35, -25.25]]], [[[114.5, -23.75], [113.97, -23.53], [113.75, -23.0], [113.97, -22.47], [114.5, -22.25], [114.75, -22.35], [115.0, -22.25], [115.53, -22.47], [115.75, -23.0], [115.53, -23.53], [115.0, -23.75], [114.75, -23.65], [114.5, -23.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.225389027679967}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.443300737113697}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [28.30665529095461, 26.67327650548566, 26.524961794562103, 27.411280981052357, 27.480228283376675]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.447186273336115, 24.195474251226244, 23.968414952360092, 24.901037159976738, 26.24005301297126]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.467358498366943, -5.769308890691359, -5.985521165819019, -5.1505921189009, -4.878302746872062]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.073253222819858, -7.225389027679967, -7.193097887994327, -6.4220778064479305, -5.526589794011784]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.448309102096492, -1.829424958024557, -1.885661459374984, -1.6363118717014968, -1.584871060580905]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5745996451557898, -2.1618251566691242, -2.23239743403385, -1.9165855926271276, -1.6627333130041058]}}