{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:25.127113", "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": "2021-Sep-13_to_2021-Sep-15_147.5_-33.0"}, "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": 2021090000469}, "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 13 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 15 2021"}, "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": 54079.66995532959}, "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": -33.0}, "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": 147.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "147.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 146.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 148.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -35.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[145.82, -33.82], [145.85, -33.75], [145.75, -33.5], [145.85, -33.25], [145.75, -33.0], [145.97, -32.47], [146.32, -32.32], [146.47, -31.97], [146.82, -31.82], [146.97, -31.47], [147.5, -31.25], [148.03, -31.47], [148.25, -32.0], [148.15, -32.25], [148.18, -32.32], [148.25, -32.35], [148.5, -32.25], [149.03, -32.47], [149.25, -33.0], [149.15, -33.25], [149.25, -33.5], [149.03, -34.03], [148.5, -34.25], [148.25, -34.15], [148.18, -34.18], [148.03, -34.53], [147.68, -34.68], [147.53, -35.03], [147.18, -35.18], [147.03, -35.53], [146.5, -35.75], [146.25, -35.65], [146.0, -35.75], [145.47, -35.53], [145.25, -35.0], [145.35, -34.75], [145.25, -34.5], [145.47, -33.97], [145.82, -33.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Australia", "S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.25, -34.5], [145.47, -33.97], [145.82, -33.82], [145.85, -33.75], [145.75, -33.5], [145.85, -33.25], [145.75, -33.0], [145.97, -32.47], [146.32, -32.32], [146.47, -31.97], [146.82, -31.82], [146.97, -31.47], [147.5, -31.25], [148.03, -31.47], [148.25, -32.0], [148.15, -32.25], [148.18, -32.32], [148.25, -32.35], [148.5, -32.25], [149.03, -32.47], [149.25, -33.0], [149.15, -33.25], [149.25, -33.5], [149.03, -34.03], [148.5, -34.25], [148.25, -34.15], [148.18, -34.18], [148.03, -34.53], [147.68, -34.68], [147.53, -35.03], [147.18, -35.18], [147.03, -35.53], [146.5, -35.75], [146.25, -35.65], [146.0, -35.75], [145.47, -35.53], [145.25, -35.0], [145.35, -34.75], [145.25, -34.5]]]]}, "2021-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.25, -34.5], [145.47, -33.97], [145.82, -33.82], [145.85, -33.75], [145.75, -33.5], [145.85, -33.25], [145.75, -33.0], [145.97, -32.47], [146.32, -32.32], [146.47, -31.97], [146.82, -31.82], [146.97, -31.47], [147.5, -31.25], [148.03, -31.47], [148.25, -32.0], [148.15, -32.25], [148.18, -32.32], [148.25, -32.35], [148.5, -32.25], [149.03, -32.47], [149.25, -33.0], [149.15, -33.25], [149.25, -33.5], [149.03, -34.03], [148.5, -34.25], [148.25, -34.15], [148.18, -34.18], [148.03, -34.53], [147.68, -34.68], [147.53, -35.03], [147.18, -35.18], [147.03, -35.53], [146.5, -35.75], [146.25, -35.65], [146.0, -35.75], [145.47, -35.53], [145.25, -35.0], [145.35, -34.75], [145.25, -34.5]]]]}, "2021-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.25, -34.5], [145.47, -33.97], [145.82, -33.82], [145.85, -33.75], [145.75, -33.5], [145.85, -33.25], [145.75, -33.0], [145.97, -32.47], [146.32, -32.32], [146.47, -31.97], [146.82, -31.82], [146.97, -31.47], [147.5, -31.25], [148.03, -31.47], [148.25, -32.0], [148.15, -32.25], [148.18, -32.32], [148.25, -32.35], [148.5, -32.25], [149.03, -32.47], [149.25, -33.0], [149.15, -33.25], [149.25, -33.5], [149.03, -34.03], [148.5, -34.25], [148.25, -34.15], [148.18, -34.18], [148.03, -34.53], [147.68, -34.68], [147.53, -35.03], [147.18, -35.18], [147.03, -35.53], [146.5, -35.75], [146.25, -35.65], [146.0, -35.75], [145.47, -35.53], [145.25, -35.0], [145.35, -34.75], [145.25, -34.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.2778633865148095}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.289314406148859}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.816846316326291, 8.572286593262618, 9.136817514633037]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.624690279148751, 6.939576804548665, 7.653543695431608]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.775115189467975, -4.179185623389969, -3.9136424055886323]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.2778633865148095, -4.640263113921549, -4.407852298125135]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.625457670575726, -1.3514534721668015, -1.2471586785957176]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7574760708178756, -1.5428409128116594, -1.3892610337400784]}}