{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:52.869757", "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": "2026-Jan-23_to_2026-Jan-28_142.5_-17.0"}, "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": 2026010000709}, "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 23 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 28 2026"}, "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": 108854.18065703707}, "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": -17.0}, "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": 142.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "142.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 141.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 145.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[141.25, -17.0], [141.35, -16.75], [141.25, -16.5], [141.35, -16.25], [141.25, -16.0], [141.47, -15.47], [141.82, -15.32], [141.97, -14.97], [142.5, -14.75], [142.75, -14.85], [143.0, -14.75], [143.25, -14.85], [143.5, -14.75], [144.03, -14.97], [144.18, -15.32], [144.53, -15.47], [144.75, -16.0], [144.53, -16.53], [144.13, -16.7], [144.25, -17.0], [144.15, -17.25], [144.25, -17.5], [144.04, -18.0], [144.18, -18.32], [144.53, -18.47], [144.68, -18.82], [144.75, -18.85], [145.0, -18.75], [145.53, -18.97], [145.75, -19.5], [145.65, -19.75], [145.75, -20.0], [145.53, -20.53], [145.0, -20.75], [144.75, -20.65], [144.5, -20.75], [144.25, -20.65], [144.0, -20.75], [143.75, -20.65], [143.5, -20.75], [142.97, -20.53], [142.75, -20.0], [142.85, -19.75], [142.82, -19.68], [142.47, -19.53], [142.32, -19.18], [142.25, -19.15], [142.0, -19.25], [141.75, -19.15], [141.5, -19.25], [140.97, -19.03], [140.75, -18.5], [140.97, -17.97], [141.32, -17.82], [141.35, -17.75], [141.25, -17.5], [141.35, -17.25], [141.25, -17.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia", "C.Australia", "E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.25, -16.0], [141.47, -15.47], [141.82, -15.32], [141.97, -14.97], [142.5, -14.75], [142.75, -14.85], [143.0, -14.75], [143.25, -14.85], [143.5, -14.75], [144.03, -14.97], [144.18, -15.32], [144.53, -15.47], [144.75, -16.0], [144.53, -16.53], [144.0, -16.75], [143.75, -16.65], [143.5, -16.75], [143.25, -16.65], [143.18, -16.68], [143.03, -17.03], [142.5, -17.25], [142.25, -17.15], [142.0, -17.25], [141.47, -17.03], [141.25, -16.5], [141.35, -16.25], [141.25, -16.0]]]]}, "2026-01-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.35, -17.75], [141.25, -17.5], [141.35, -17.25], [141.25, -17.0], [141.35, -16.75], [141.25, -16.5], [141.35, -16.25], [141.25, -16.0], [141.47, -15.47], [141.82, 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"max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.971844023244898}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0086588708865083}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.49402033487962, 25.10216962289121, 25.02875080280478, 24.342375503351604, 24.273068847656305, 25.027926381429097]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.4706804911296, 23.646168009440146, 21.779494222005212, 19.869134521484398, 21.066125488281273, 24.56755854288741]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5718608150683453, -3.392160777169181, -2.706798084508828, -3.1774082086645077, -2.982964702737427, -3.3200375257059958]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.942395238994891, -4.9410990620907, -3.7079012901617716, -4.971844023244898, -4.336550652429025, -3.8323737549343946]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9359768826643111, -2.252044843848952, -1.7360916925807173, -1.8834750735630084, -1.7673255794040599, -2.1840366258851684]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.469466524284847, -3.255782882543334, -2.4241277091889426, -2.6812690054459978, -2.1214044162275147, -2.588237676193166]}}