{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:26.213776", "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-Jan-27_to_2023-Jan-30_129.5_-25.0"}, "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": 2023010001228}, "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": "January 27 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 30 2023"}, "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": 190691.07044506678}, "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": -25.0}, "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": 129.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 132.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -27.5}, "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": [[[[128.25, -25.65], [128.0, -25.75], [127.75, -25.65], [127.5, -25.75], [127.25, -25.65], [127.0, -25.75], [126.75, -25.65], [126.68, -25.68], [126.53, -26.03], [126.0, -26.25], [125.47, -26.03], [125.25, -25.5], [125.35, -25.25], [125.25, -25.0], [125.35, -24.75], [125.25, -24.5], [125.35, -24.25], [125.32, -24.18], [124.97, -24.03], [124.75, -23.5], [124.85, -23.25], [124.75, -23.0], [124.85, -22.75], [124.75, -22.5], [124.97, -21.97], [125.5, -21.75], [125.75, -21.85], [126.0, -21.75], [126.25, -21.85], [126.5, -21.75], [126.75, -21.85], [127.0, -21.75], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.68, -22.82], [127.75, -22.85], [128.0, -22.75], [128.25, -22.85], [128.5, -22.75], [129.03, -22.97], [129.25, -23.5], [129.15, -23.75], [129.18, -23.82], [129.25, -23.85], [129.5, -23.75], [129.75, -23.85], [130.0, -23.75], [130.5, -23.96], [131.0, -23.75], [131.25, -23.85], [131.5, -23.75], [132.03, -23.97], [132.18, -24.32], [132.53, -24.47], [132.75, -25.0], [132.65, -25.25], [132.68, -25.32], [133.03, -25.47], [133.25, -26.0], [133.15, -26.25], [133.25, -26.5], [133.15, -26.75], [133.25, -27.0], [133.03, -27.53], [132.68, -27.68], [132.53, -28.03], [132.0, -28.25], [131.75, -28.15], [131.5, -28.25], [130.97, -28.03], [130.75, -27.5], [130.85, -27.25], [130.75, -27.0], [130.53, -27.53], [130.0, -27.75], [129.47, -27.53], [129.32, -27.18], [128.97, -27.03], [128.82, -26.68], [128.47, -26.53], [128.25, -26.0], [128.38, -25.7], [128.25, -25.65]], [[130.85, -26.75], [130.82, -26.68], [130.75, -26.65], [130.68, -26.68], [130.65, -26.75], [130.75, -27.0], [130.85, -26.75]]]]}}, "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": {"2023-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, -23.0], [124.85, -22.75], [124.75, -22.5], [124.97, -21.97], [125.5, -21.75], [125.75, -21.85], [126.0, -21.75], [126.25, -21.85], [126.5, -21.75], [126.75, -21.85], [127.0, -21.75], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.68, -22.82], [127.75, -22.85], [128.0, -22.75], [128.25, -22.85], [128.5, -22.75], [129.03, -22.97], [129.25, -23.5], [129.15, -23.75], [129.18, -23.82], [129.25, -23.85], [129.5, -23.75], [129.75, -23.85], [130.0, -23.75], [130.53, -23.97], [130.75, -24.5], [130.53, -25.03], [130.18, -25.18], [130.03, -25.53], [129.5, -25.75], [129.25, -25.65], [129.0, -25.75], [128.75, -25.65], [128.5, -25.75], [128.25, -25.65], [128.0, -25.75], [127.75, -25.65], [127.5, -25.75], [127.25, -25.65], [127.0, -25.75], [126.75, -25.65], [126.68, -25.68], [126.53, -26.03], [126.0, -26.25], [125.47, -26.03], [125.25, -25.5], [125.35, -25.25], [125.25, -25.0], [125.35, -24.75], [125.25, -24.5], [125.35, -24.25], [125.32, -24.18], [124.97, -24.03], [124.75, -23.5], [124.85, -23.25], [124.75, -23.0]]]]}, "2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, -23.0], [124.85, -22.75], [124.75, -22.5], [124.97, -21.97], [125.5, -21.75], [125.75, -21.85], [126.0, -21.75], [126.25, -21.85], [126.5, -21.75], [126.75, -21.85], [127.0, -21.75], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.68, -22.82], [127.75, -22.85], [128.0, -22.75], [128.25, -22.85], [128.5, -22.75], [129.03, -22.97], [129.25, -23.5], [129.15, -23.75], [129.18, -23.82], [129.25, -23.85], [129.5, -23.75], [129.75, -23.85], [130.0, -23.75], [130.5, -23.96], [131.0, -23.75], [131.25, -23.85], [131.5, -23.75], [132.03, -23.97], [132.18, -24.32], [132.53, -24.47], [132.75, -25.0], [132.65, -25.25], [132.68, -25.32], [133.03, -25.47], [133.25, -26.0], [133.15, -26.25], [133.25, -26.5], [133.15, -26.75], [133.25, -27.0], [133.03, -27.53], [132.68, -27.68], [132.53, -28.03], [132.0, -28.25], [131.75, -28.15], [131.5, -28.25], [130.97, -28.03], [130.75, -27.5], [130.85, -27.25], [130.75, -27.0], [130.53, -27.53], [130.0, -27.75], [129.47, -27.53], [129.32, -27.18], [128.97, -27.03], [128.82, -26.68], [128.47, -26.53], [128.25, -26.0], [128.38, -25.7], [128.25, -25.65], [128.0, -25.75], [127.75, -25.65], [127.5, -25.75], [127.25, -25.65], [127.0, -25.75], [126.75, -25.65], [126.68, -25.68], [126.53, -26.03], [126.0, -26.25], [125.47, -26.03], [125.25, -25.5], [125.35, -25.25], [125.25, -25.0], [125.35, -24.75], [125.25, -24.5], [125.35, -24.25], [125.32, -24.18], [124.97, -24.03], [124.75, -23.5], [124.85, -23.25], [124.75, -23.0]], [[130.85, -26.75], [130.82, -26.68], [130.75, -26.65], [130.68, -26.68], [130.65, -26.75], [130.75, -27.0], [130.85, -26.75]]]]}, "2023-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.75, -23.0], [124.85, -22.75], [124.75, -22.5], [124.97, -21.97], [125.5, -21.75], [125.75, -21.85], [126.0, -21.75], [126.25, -21.85], [126.5, -21.75], [126.75, -21.85], [127.0, -21.75], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.68, -22.82], [127.75, -22.85], [128.0, -22.75], [128.25, -22.85], [128.5, -22.75], [129.03, -22.97], [129.25, -23.5], [129.15, -23.75], [129.18, -23.82], [129.25, -23.85], [129.5, -23.75], [129.75, -23.85], [130.0, -23.75], [130.5, -23.96], [131.0, -23.75], [131.25, -23.85], [131.5, -23.75], [132.03, -23.97], [132.18, -24.32], [132.53, -24.47], [132.75, -25.0], [132.65, -25.25], [132.68, -25.32], [133.03, -25.47], [133.25, -26.0], [133.15, -26.25], [133.25, -26.5], [133.15, -26.75], [133.25, -27.0], [133.03, -27.53], [132.68, -27.68], [132.53, -28.03], [132.0, -28.25], [131.75, -28.15], [131.5, -28.25], [130.97, -28.03], [130.75, -27.5], [130.85, -27.25], [130.75, -27.0], [130.53, -27.53], [130.0, -27.75], [129.47, -27.53], [129.32, -27.18], [128.97, -27.03], [128.82, -26.68], [128.47, -26.53], [128.25, -26.0], [128.38, -25.7], [128.25, -25.65], [128.0, -25.75], [127.75, -25.65], [127.5, -25.75], [127.25, -25.65], [127.0, -25.75], [126.75, -25.65], [126.68, -25.68], [126.53, -26.03], [126.0, -26.25], [125.47, -26.03], [125.25, -25.5], [125.35, -25.25], [125.25, -25.0], [125.35, -24.75], [125.25, -24.5], [125.35, -24.25], [125.32, -24.18], [124.97, -24.03], [124.75, -23.5], [124.85, -23.25], [124.75, -23.0]], [[130.85, -26.75], [130.82, -26.68], [130.75, -26.65], [130.68, -26.68], [130.65, -26.75], [130.75, -27.0], [130.85, -26.75]]]]}, "2023-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.47, -26.53], [128.25, -26.0], [128.47, -25.47], [128.88, -25.3], [128.75, -25.0], [128.85, -24.75], [128.75, -24.5], [128.97, -23.97], [129.5, -23.75], [129.75, -23.85], [130.0, -23.75], [130.5, -23.96], [131.0, -23.75], [131.25, -23.85], [131.5, -23.75], [132.03, -23.97], [132.18, -24.32], [132.53, -24.47], [132.75, -25.0], [132.65, -25.25], [132.68, -25.32], [133.03, -25.47], [133.25, -26.0], [133.15, -26.25], [133.25, -26.5], [133.15, -26.75], [133.25, -27.0], [133.03, -27.53], [132.68, -27.68], [132.53, -28.03], [132.0, -28.25], [131.75, -28.15], [131.5, -28.25], [130.97, -28.03], [130.75, -27.5], [130.85, -27.25], [130.75, -27.0], [130.53, -27.53], [130.0, -27.75], [129.47, -27.53], [129.32, -27.18], [128.97, -27.03], [128.82, -26.68], [128.47, -26.53]], [[130.85, -26.75], [130.82, -26.68], [130.75, -26.65], [130.68, -26.68], [130.65, -26.75], [130.75, -27.0], [130.85, -26.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.714890168765066}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.407007062117247}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.905574317907735, 24.423946691601884, 24.070945445315658, 23.544053236047603]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.67227791991337, 21.98001566829322, 19.759137019544767, 21.822731273388513]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.83791082259325, -6.346007235321885, -6.537753677995205, -5.733631177236633]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.336401566025756, -7.391747842053405, -8.714890168765066, -6.694661476064084]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.08571224727682, -1.8732778968709562, -1.8640005440358047, -1.5836444150515379]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7534707255636333, -2.2881394994921713, -2.2605974283516095, -1.7203048719308374]}}