{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:57.274534", "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": "2024-Sep-15_to_2024-Sep-17_158.5_-31.5"}, "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": 2024090000357}, "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 15 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 17 2024"}, "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": 50558.66768207865}, "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": ["Coral Sea", "Pacific Ocean", "Tasman Sea"]}, "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": -31.5}, "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": 158.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "158.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 156.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 159.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[156.0, -28.75], [156.25, -28.85], [156.5, -28.75], [156.75, -28.85], [157.0, -28.75], [157.53, -28.97], [157.68, -29.32], [158.03, -29.47], [158.18, -29.82], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.53, -29.97], [159.68, -30.32], [160.03, -30.47], [160.25, -31.0], [160.15, -31.25], [160.25, -31.5], [160.03, -32.03], [159.5, -32.25], [159.25, -32.15], [159.18, -32.18], [159.03, -32.53], [158.5, -32.75], [157.97, -32.53], [157.75, -32.0], [157.85, -31.75], [157.82, -31.68], [157.47, -31.53], [157.25, -31.0], [157.35, -30.75], [157.32, -30.68], [157.25, -30.65], [157.18, -30.68], [157.03, -31.03], [156.5, -31.25], [155.97, -31.03], [155.82, -30.68], [155.47, -30.53], [155.25, -30.0], [155.35, -29.75], [155.25, -29.5], [155.47, -28.97], [156.0, -28.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[155.25, -29.5], [155.47, -28.97], [156.0, -28.75], [156.25, -28.85], [156.5, -28.75], [156.75, -28.85], [157.0, -28.75], [157.53, -28.97], [157.68, -29.32], [158.03, -29.47], [158.18, -29.82], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.53, -29.97], [159.68, -30.32], [160.03, -30.47], [160.25, -31.0], [160.15, -31.25], [160.25, -31.5], [160.03, -32.03], [159.5, -32.25], [159.25, -32.15], [159.18, -32.18], [159.03, -32.53], [158.5, -32.75], [157.97, -32.53], [157.75, -32.0], [157.85, -31.75], [157.82, -31.68], [157.47, -31.53], [157.25, -31.0], [157.35, -30.75], [157.32, -30.68], [157.25, -30.65], [157.18, -30.68], [157.03, -31.03], [156.5, -31.25], [155.97, -31.03], [155.82, -30.68], [155.47, -30.53], [155.25, -30.0], [155.35, -29.75], [155.25, -29.5]]]]}, "2024-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[155.25, -29.5], [155.47, -28.97], [156.0, -28.75], [156.25, -28.85], [156.5, -28.75], [156.75, -28.85], [157.0, -28.75], [157.53, -28.97], [157.68, -29.32], [158.03, -29.47], [158.18, -29.82], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.53, -29.97], [159.68, -30.32], [160.03, -30.47], [160.25, -31.0], [160.15, -31.25], [160.25, -31.5], [160.03, -32.03], [159.5, -32.25], [159.25, -32.15], [159.18, -32.18], [159.03, -32.53], [158.5, -32.75], [157.97, -32.53], [157.75, -32.0], [157.85, -31.75], [157.82, -31.68], [157.47, -31.53], [157.25, -31.0], [157.35, -30.75], [157.32, -30.68], [157.25, -30.65], [157.18, -30.68], [157.03, -31.03], [156.5, -31.25], [155.97, -31.03], [155.82, -30.68], [155.47, -30.53], [155.25, -30.0], [155.35, -29.75], [155.25, -29.5]]]]}, "2024-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[155.25, -29.5], [155.47, -28.97], [156.0, -28.75], [156.25, -28.85], [156.5, -28.75], [156.75, -28.85], [157.0, -28.75], [157.53, -28.97], [157.68, -29.32], [158.03, -29.47], [158.18, -29.82], [158.25, -29.85], [158.5, -29.75], [158.75, -29.85], [159.0, -29.75], [159.53, -29.97], [159.68, -30.32], [160.03, -30.47], [160.25, -31.0], [160.15, -31.25], [160.25, -31.5], [160.03, -32.03], [159.5, -32.25], [159.25, -32.15], [159.18, -32.18], [159.03, -32.53], [158.5, -32.75], [157.97, -32.53], [157.75, -32.0], [157.85, -31.75], [157.82, -31.68], [157.47, -31.53], [157.25, -31.0], [157.35, -30.75], [157.32, -30.68], [157.25, -30.65], [157.18, -30.68], [157.03, -31.03], [156.5, -31.25], [155.97, -31.03], [155.82, -30.68], [155.47, -30.53], [155.25, -30.0], [155.35, -29.75], [155.25, -29.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.0202209863511484}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.5859753852654273}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.540660643995864, 16.841302958705967, 16.66700268126374]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.48801193237307, 15.860992685953818, 16.01306559244796]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.698295363118557, -1.437653694596505, -1.6219770980812194]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.0202209863511484, -1.696329594545091, -1.782636840500743]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7085666805243929, -1.4342740308825213, -1.5558155353051202]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9244110342153762, -1.7330289310989893, -1.7606661650211441]}}