{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:54:54.565242", "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-Aug-30_to_2023-Sep-04_142.0_-12.0"}, "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": 2023080000765}, "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": "August 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 04 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 57072.72229747996}, "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": -12.0}, "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": 142.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "142.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 142.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 143.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -15.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -11.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[142.0, -13.75], [142.25, -13.85], [142.38, -13.8], [142.32, -13.68], [141.97, -13.53], [141.82, -13.18], [141.47, -13.03], [141.25, -12.5], [141.35, -12.25], [141.25, -12.0], [141.47, -11.47], [141.82, -11.32], [141.85, -11.25], [141.75, -11.0], [141.97, -10.47], [142.5, -10.25], [143.03, -10.47], [143.25, -11.0], [143.15, -11.25], [143.25, -11.5], [143.15, -11.75], [143.25, -12.0], [143.15, -12.25], [143.18, -12.32], [143.53, -12.47], [143.68, -12.82], [144.03, -12.97], [144.25, -13.5], [144.15, -13.75], [144.25, -14.0], [144.15, -14.25], [144.25, -14.5], [144.15, -14.75], [144.25, -15.0], [144.03, -15.53], [143.68, -15.68], [143.53, -16.03], [143.0, -16.25], [142.75, -16.15], [142.5, -16.25], [141.97, -16.03], [141.75, -15.5], [141.85, -15.25], [141.82, -15.18], [141.47, -15.03], [141.25, -14.5], [141.47, -13.97], [142.0, -13.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": 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[141.47, -11.47]]]]}, "2023-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.47, -11.47], [142.0, -11.25], [142.53, -11.47], [142.75, -12.0], [142.53, -12.53], [142.0, -12.75], [141.47, -12.53], [141.25, -12.0], [141.47, -11.47]]]]}, "2023-09-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.47, -11.47], [142.0, -11.25], [142.53, -11.47], [142.75, -12.0], [142.53, -12.53], [142.0, -12.75], [141.47, -12.53], [141.25, -12.0], [141.47, -11.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.2109811738324083}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6469086107281385}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [23.347448959562655, 23.20620844738545, 23.41519898663222, 24.884969502534318, 24.61253905992021, 24.705922663553622]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.845929589935565, 21.75999807085242, 22.031882762850273, 24.884969502534318, 24.61253905992021, 24.705922663553622]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.4983290601935677, -1.7922480568911756, -1.6763086308357, -1.224303767982235, -1.55874213938813, -1.5120619752949551]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.1976994773137335, -2.2109811738324083, -2.181283999600339, -1.224303767982235, -1.55874213938813, -1.5120619752949551]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.497463897940096, -1.8840058607422672, 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