{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:21.617982", "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": "2021-Dec-26_to_2021-Dec-30_144.5_-18.0"}, "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": 2021120000986}, "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": "December 26 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 30 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 197853.35408747994}, "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": -18.0}, "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": 144.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "144.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 140.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 146.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -19.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -15.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[146.03, -16.47], [146.25, -17.0], [146.15, -17.25], [146.25, -17.5], [146.15, -17.75], [146.18, -17.82], [146.53, -17.97], [146.75, -18.5], [146.53, -19.03], [146.18, -19.18], [146.03, -19.53], [145.5, -19.75], [145.25, -19.65], [145.0, -19.75], [144.75, -19.65], [144.5, -19.75], [143.97, -19.53], [143.82, -19.18], [143.75, -19.15], [143.5, -19.25], [143.25, -19.15], [143.0, -19.25], [142.75, -19.15], [142.5, -19.25], [141.97, -19.03], [141.82, -18.68], [141.75, -18.65], [141.5, -18.75], [141.25, -18.65], [141.0, -18.75], [140.75, -18.65], [140.5, -18.75], [140.25, -18.65], [140.0, -18.75], [139.47, -18.53], [139.25, -18.0], [139.47, -17.47], [140.0, -17.25], [140.25, -17.35], [140.32, -17.32], [140.35, -17.25], [140.25, -17.0], [140.35, -16.75], [140.25, -16.5], [140.47, -15.97], [140.82, -15.82], [140.97, -15.47], [141.32, -15.32], [141.47, -14.97], [141.82, -14.82], [141.97, -14.47], [142.5, -14.25], [142.75, -14.35], [143.0, -14.25], [143.53, -14.47], [143.68, -14.82], [143.75, -14.85], [144.0, -14.75], [144.25, -14.85], [144.5, -14.75], [145.03, -14.97], [145.25, -15.5], [145.15, -15.75], [145.18, -15.82], [145.53, -15.97], [145.68, -16.32], [146.03, -16.47]]]]}}, "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": {"2021-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -16.97], [141.0, -16.75], [141.25, -16.85], [141.5, -16.75], [141.75, -16.85], [142.0, -16.75], [142.25, -16.85], [142.5, -16.75], [142.75, -16.85], [143.0, -16.75], [143.53, -16.97], [143.68, -17.32], [143.75, -17.35], [144.0, -17.25], [144.25, -17.35], [144.5, -17.25], [145.03, -17.47], [145.25, -18.0], [145.03, -18.53], [144.5, -18.75], [144.25, -18.65], [144.18, -18.68], [144.03, -19.03], [143.5, -19.25], [143.25, -19.15], [143.0, -19.25], [142.75, -19.15], [142.5, -19.25], [141.97, -19.03], [141.82, -18.68], [141.75, -18.65], [141.5, -18.75], [141.25, -18.65], [141.0, 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24.192885431530897, 23.429143884327857]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.395801885177775, 22.009108195373017, 21.36275556596928, 20.338469845711586, 20.83401360918799]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2777261682027454, -3.6127940632455413, -3.9332510163759973, -3.7542211639456817, -2.642452841468501]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.208967470094194, -4.895165979720389, -5.714758720165037, -5.556410568006129, -3.519928768299792]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4885027639703896, -1.8777417816798136, -2.101937520593621, -2.1420329787567454, 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