{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:17.858713", "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-May-26_to_2023-May-28_129.0_-27.5"}, "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": 2023050000783}, "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": "May 26 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 28 2023"}, "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": 71482.41371638593}, "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": -27.5}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 127.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 131.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -28.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[126.25, -26.5], [126.47, -25.97], [127.0, -25.75], [127.25, -25.85], [127.5, -25.75], [128.0, -25.96], [128.5, -25.75], [129.0, -25.96], [129.5, -25.75], [130.0, -25.96], [130.5, -25.75], [130.75, -25.85], [131.0, -25.75], [131.53, -25.97], [131.75, -26.5], [131.65, -26.75], [131.75, -27.0], [131.53, -27.53], [131.18, -27.68], [131.03, -28.03], [130.5, -28.25], [130.2, -28.12], [130.15, -28.25], [130.25, -28.5], [130.03, -29.03], [129.5, -29.25], [128.97, -29.03], [128.82, -28.68], [128.5, -28.54], [128.0, -28.75], [127.47, -28.53], [127.32, -28.18], [127.25, -28.15], [127.0, -28.25], [126.47, -28.03], [126.25, -27.5], [126.35, -27.25], [126.25, -27.0], [126.35, -26.75], [126.25, -26.5]]]]}}, "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": {"2023-05-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.25, -27.0], [126.35, -26.75], [126.25, -26.5], [126.47, -25.97], [127.0, -25.75], [127.25, -25.85], [127.5, -25.75], [128.0, -25.96], [128.5, -25.75], [129.0, -25.96], [129.5, -25.75], [130.0, -25.96], [130.5, -25.75], [130.75, -25.85], [131.0, -25.75], [131.53, -25.97], [131.75, -26.5], [131.65, -26.75], [131.75, -27.0], [131.53, -27.53], [131.18, -27.68], [131.03, -28.03], [130.5, -28.25], [130.2, -28.12], [130.15, -28.25], [130.25, -28.5], [130.03, -29.03], [129.5, -29.25], [128.97, -29.03], [128.82, -28.68], [128.5, -28.54], [128.0, -28.75], [127.47, -28.53], [127.32, -28.18], [127.25, -28.15], [127.0, -28.25], [126.47, -28.03], [126.25, -27.5], [126.35, -27.25], [126.25, -27.0]]]]}, "2023-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.25, -27.0], [126.35, -26.75], [126.25, -26.5], [126.47, -25.97], [127.0, -25.75], [127.25, -25.85], [127.5, -25.75], [128.0, -25.96], [128.5, -25.75], [129.0, -25.96], [129.5, -25.75], [130.0, -25.96], [130.5, -25.75], [130.75, -25.85], [131.0, -25.75], [131.53, -25.97], [131.75, -26.5], [131.65, -26.75], [131.75, -27.0], [131.53, -27.53], [131.18, -27.68], [131.03, -28.03], [130.5, -28.25], [130.2, -28.12], [130.15, -28.25], [130.25, -28.5], [130.03, -29.03], [129.5, -29.25], [128.97, -29.03], [128.82, -28.68], [128.5, -28.54], [128.0, -28.75], [127.47, -28.53], [127.32, -28.18], [127.25, -28.15], [127.0, -28.25], [126.47, -28.03], [126.25, -27.5], [126.35, -27.25], [126.25, -27.0]]]]}, "2023-05-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.25, -27.0], [126.35, -26.75], [126.25, -26.5], [126.47, -25.97], [127.0, -25.75], [127.25, -25.85], [127.5, -25.75], [128.0, -25.96], [128.5, -25.75], [129.0, -25.96], [129.5, -25.75], [130.0, -25.96], [130.5, -25.75], [130.75, -25.85], [131.0, -25.75], [131.53, -25.97], [131.75, -26.5], [131.65, -26.75], [131.75, -27.0], [131.53, -27.53], [131.18, -27.68], [131.03, -28.03], [130.5, -28.25], [130.2, -28.12], [130.15, -28.25], [130.25, -28.5], [130.03, -29.03], [129.5, -29.25], [128.97, -29.03], [128.82, -28.68], [128.5, -28.54], [128.0, -28.75], [127.47, -28.53], [127.32, -28.18], [127.25, -28.15], [127.0, -28.25], [126.47, -28.03], [126.25, -27.5], [126.35, -27.25], [126.25, -27.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.62379702656807}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.40840635935776}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.704793645540008, 9.13068138801708, 10.474533470372535]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.69362482568016, 8.036418290326196, 9.462428009800192]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.661447273495991, -5.058442990970539, -3.50532881360675]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.1782018264659655, -5.62379702656807, -3.9379724514102463]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5661106665439395, -1.699325115863481, -1.2089182074359388]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.690532154261851, -1.9083427169968707, -1.3752928142279428]}}