{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:51.922344", "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": "2022-Jan-21_to_2022-Jan-24_139.0_-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": 2022010000836}, "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": "January 21 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 24 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 127943.320325637}, "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": 139.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "139.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 138.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 141.5}, "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": -26.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.46, -27.0], [137.25, -26.5], [137.47, -25.97], [138.0, -25.75], [138.25, -25.85], [138.5, -25.75], [138.75, -25.85], [139.0, -25.75], [139.25, -25.85], [139.5, -25.75], [139.75, -25.85], [140.0, -25.75], [140.53, -25.97], [140.68, -26.32], [141.03, -26.47], [141.18, -26.82], [141.25, -26.85], [141.5, -26.75], [142.03, -26.97], [142.25, -27.5], [142.03, -28.03], [141.68, -28.18], [141.65, -28.25], [141.75, -28.5], [141.53, -29.03], [141.18, -29.18], [141.03, -29.53], [140.68, -29.68], [140.65, -29.75], [140.75, -30.0], [140.53, -30.53], [140.18, -30.68], [140.15, -30.75], [140.25, -31.0], [140.03, -31.53], [139.5, -31.75], [138.97, -31.53], [138.82, -31.18], [138.47, -31.03], [138.25, -30.5], [138.35, -30.25], [138.32, -30.18], [137.97, -30.03], [137.75, -29.5], [137.85, -29.25], [137.82, -29.18], [137.47, -29.03], [137.25, -28.5], [137.35, -28.25], [137.25, -28.0], [137.35, -27.75], [137.25, -27.5], [137.46, -27.0]]]]}}, "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": {"2022-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.25, -28.0], [137.35, -27.75], [137.25, -27.5], [137.47, -26.97], [137.82, -26.82], [137.97, -26.47], [138.5, -26.25], [138.75, -26.35], [139.0, -26.25], [139.3, -26.37], [139.47, -25.97], [140.0, -25.75], [140.53, -25.97], [140.75, -26.5], [140.53, -27.03], [140.0, -27.25], [139.7, -27.12], [139.65, -27.25], [139.75, -27.5], [139.65, -27.75], [139.75, -28.0], [139.53, -28.53], [139.18, -28.68], [139.03, -29.03], [138.5, -29.25], [138.25, -29.15], [138.0, -29.25], [137.47, -29.03], [137.25, -28.5], [137.35, -28.25], [137.25, -28.0]]]]}, "2022-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.25, -28.0], [137.35, -27.75], [137.25, -27.5], [137.46, -27.0], [137.25, -26.5], [137.47, -25.97], [138.0, -25.75], [138.25, -25.85], [138.5, -25.75], [138.75, -25.85], [139.0, -25.75], [139.25, -25.85], [139.5, -25.75], [139.75, -25.85], [140.0, -25.75], [140.53, -25.97], [140.68, -26.32], [141.03, -26.47], [141.18, -26.82], [141.25, -26.85], [141.5, -26.75], [142.03, -26.97], [142.25, -27.5], [142.03, -28.03], [141.68, -28.18], [141.65, -28.25], [141.75, -28.5], [141.53, -29.03], [141.18, -29.18], [141.03, -29.53], [140.68, -29.68], [140.65, -29.75], [140.75, -30.0], [140.53, -30.53], [140.18, -30.68], [140.15, -30.75], [140.25, -31.0], [140.03, -31.53], [139.5, -31.75], [138.97, -31.53], [138.82, -31.18], [138.47, -31.03], [138.25, -30.5], [138.35, -30.25], [138.32, -30.18], [137.97, -30.03], [137.75, -29.5], [137.85, -29.25], [137.82, -29.18], [137.47, -29.03], [137.25, -28.5], [137.35, -28.25], [137.25, -28.0]]]]}, "2022-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.25, -28.0], [137.35, -27.75], [137.25, -27.5], [137.46, -27.0], [137.25, -26.5], [137.47, -25.97], [138.0, -25.75], [138.25, -25.85], [138.5, -25.75], [138.75, -25.85], [139.0, 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-25.75], [139.75, -25.85], [140.0, -25.75], [140.53, -25.97], [140.68, -26.32], [141.03, -26.47], [141.18, -26.82], [141.25, -26.85], [141.5, -26.75], [142.03, -26.97], [142.25, -27.5], [142.03, -28.03], [141.68, -28.18], [141.65, -28.25], [141.75, -28.5], [141.53, -29.03], [141.18, -29.18], [141.03, -29.53], [140.68, -29.68], [140.65, -29.75], [140.75, -30.0], [140.53, -30.53], [140.18, -30.68], [140.15, -30.75], [140.25, -31.0], [140.03, -31.53], [139.5, -31.75], [138.97, -31.53], [138.82, -31.18], [138.47, -31.03], [138.25, -30.5], [138.35, -30.25], [138.32, -30.18], [137.97, -30.03], [137.75, -29.5], [137.85, -29.25], [137.75, -29.0], [137.85, -28.75], [137.75, -28.5], [137.85, -28.25], [137.75, -28.0], [137.85, -27.75], [137.75, -27.5], [137.85, -27.25], [137.82, -27.18], [137.47, -27.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.618696560551484}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.7471453018573015}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.89665445291081, 25.346789423639166, 24.454609293499686, 25.108220144982056]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.215730417413397, 21.002132031633835, 20.70086666696244, 21.40070217895658]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.603568556203222, -6.530484470849472, -7.333140814506855, -6.63852289651717]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.087040007081271, -8.162765973154535, -8.455075355043846, -8.618696560551484]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.520807628905456, -1.7776122352034465, -1.9845487637148433, -1.7961280329852831]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6274420600836013, -2.187153491745987, -2.3316188835993774, -2.401253522188937]}}