{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:27.528808", "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": "2025-Feb-16_to_2025-Feb-18_119.0_-29.0"}, "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": 2025020000378}, "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": "February 16 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 18 2025"}, "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": 56212.524739704066}, "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": -29.0}, "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": 119.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 118.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 121.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -31.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[117.47, -28.97], [117.82, -28.82], [117.97, -28.47], [118.5, -28.25], [118.75, -28.35], [119.0, -28.25], [119.25, -28.35], [119.5, -28.25], [120.03, -28.47], [120.18, -28.82], [120.53, -28.97], [120.68, -29.32], [121.03, -29.47], [121.18, -29.82], [121.53, -29.97], [121.75, -30.5], [121.53, -31.03], [121.18, -31.18], [121.03, -31.53], [120.5, -31.75], [120.25, -31.65], [120.0, -31.75], [119.75, -31.65], [119.5, -31.75], [118.97, -31.53], [118.82, -31.18], [118.47, -31.03], [118.32, -30.68], [117.97, -30.53], [117.82, -30.18], [117.47, -30.03], [117.25, -29.5], [117.47, -28.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia", "S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.47, -30.03], [117.25, -29.5], [117.47, -28.97], [117.82, -28.82], [117.97, -28.47], [118.5, -28.25], [118.75, -28.35], [119.0, -28.25], [119.25, -28.35], [119.5, -28.25], [120.03, -28.47], [120.18, -28.82], [120.53, -28.97], [120.68, -29.32], [121.03, -29.47], [121.18, -29.82], [121.53, -29.97], [121.75, -30.5], [121.53, -31.03], [121.18, -31.18], [121.03, -31.53], [120.5, -31.75], [120.25, -31.65], [120.0, -31.75], [119.75, -31.65], [119.5, -31.75], [118.97, -31.53], [118.82, -31.18], [118.47, -31.03], [118.32, -30.68], [117.97, -30.53], [117.82, -30.18], [117.47, -30.03]]]]}, "2025-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.47, -30.03], [117.25, -29.5], [117.47, -28.97], [117.82, -28.82], [117.97, -28.47], [118.5, -28.25], [118.75, -28.35], [119.0, -28.25], [119.25, -28.35], [119.5, -28.25], [120.03, -28.47], [120.18, -28.82], [120.53, -28.97], [120.68, -29.32], [121.03, -29.47], [121.18, -29.82], [121.53, -29.97], [121.75, -30.5], [121.53, -31.03], [121.18, -31.18], [121.03, -31.53], [120.5, -31.75], [120.25, -31.65], [120.0, -31.75], [119.75, -31.65], [119.5, -31.75], [118.97, -31.53], [118.82, -31.18], [118.47, -31.03], [118.32, -30.68], [117.97, -30.53], [117.82, -30.18], [117.47, -30.03]]]]}, "2025-02-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[117.47, -30.03], [117.25, -29.5], [117.47, -28.97], [117.82, -28.82], [117.97, -28.47], [118.5, -28.25], [118.75, -28.35], [119.0, -28.25], [119.25, -28.35], [119.5, -28.25], [120.03, -28.47], [120.18, -28.82], [120.53, -28.97], [120.68, -29.32], [121.03, -29.47], [121.18, -29.82], [121.53, -29.97], [121.75, -30.5], [121.53, -31.03], [121.18, -31.18], [121.03, -31.53], [120.5, -31.75], [120.25, -31.65], [120.0, -31.75], [119.75, -31.65], [119.5, -31.75], [118.97, -31.53], [118.82, -31.18], [118.47, -31.03], [118.32, -30.68], [117.97, -30.53], [117.82, -30.18], [117.47, -30.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.676301723490724}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.0094472165824815}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.63360948108499, 20.20053053356355, 21.238793037051266]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.121762847900413, 17.55759201049807, 19.69620793660482]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.953577109906594, -7.170818943967604, -5.903945595873246]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.676301723490724, -8.519175511049184, -6.32083511129656]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0933118653610325, -1.8392821565588133, -1.4619497979232343]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.164391424846571, -2.114389184016088, -1.5914006534503702]}}