{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:27.890003", "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-Apr-21_to_2025-Apr-24_140.5_-20.5"}, "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": 2025040000528}, "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": "April 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2025"}, "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": 94767.98184074409}, "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": -20.5}, "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": 140.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "140.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 137.0}, "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": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.0, -20.75], [137.5, -20.96], [138.0, -20.75], [138.25, -20.85], [138.5, -20.75], [138.75, -20.85], [138.82, -20.82], [138.97, -20.47], [139.32, -20.32], [139.47, -19.97], [140.0, -19.75], [140.25, -19.85], [140.32, -19.82], [140.35, -19.75], [140.25, -19.5], [140.47, -18.97], [141.0, -18.75], [141.53, -18.97], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.63, -20.3], [142.03, -20.47], [142.25, -21.0], [142.03, -21.53], [141.68, -21.68], [141.54, -22.0], [141.75, -22.5], [141.65, -22.75], [141.75, -23.0], [141.65, -23.25], [141.75, -23.5], [141.53, -24.03], [141.0, -24.25], [140.47, -24.03], [140.32, -23.68], [139.97, -23.53], [139.82, -23.18], [139.75, -23.15], [139.5, -23.25], [139.0, -23.04], [138.5, -23.25], [138.25, -23.15], [138.0, -23.25], [137.47, -23.03], [137.32, -22.68], [136.97, -22.53], [136.82, -22.18], [136.47, -22.03], [136.25, -21.5], [136.47, -20.97], [137.0, -20.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia", "C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.47, -22.03], [136.25, -21.5], [136.47, -20.97], [137.0, -20.75], [137.5, -20.96], [138.0, -20.75], [138.25, -20.85], [138.5, -20.75], [138.75, -20.85], [138.82, -20.82], [138.97, -20.47], [139.32, -20.32], [139.47, -19.97], [140.0, -19.75], [140.25, -19.85], [140.5, -19.75], [141.03, -19.97], [141.18, -20.32], [141.53, -20.47], [141.75, -21.0], [141.53, -21.53], [141.18, -21.68], [141.15, -21.75], [141.18, -21.82], [141.53, -21.97], [141.75, -22.5], [141.65, -22.75], [141.75, -23.0], [141.65, -23.25], [141.75, -23.5], [141.53, -24.03], [141.0, -24.25], [140.47, -24.03], [140.32, -23.68], [139.97, -23.53], [139.82, -23.18], [139.75, -23.15], [139.5, -23.25], [139.0, -23.04], [138.5, -23.25], [138.25, -23.15], [138.0, -23.25], [137.47, -23.03], [137.32, -22.68], [136.97, -22.53], [136.82, -22.18], [136.47, -22.03]]]]}, "2025-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.47, -22.03], [136.25, -21.5], [136.47, -20.97], [137.0, -20.75], [137.5, -20.96], [138.0, -20.75], [138.25, -20.85], [138.5, -20.75], [138.75, -20.85], [138.82, -20.82], [138.97, -20.47], [139.32, -20.32], [139.47, -19.97], [140.0, -19.75], [140.25, -19.85], [140.32, -19.82], [140.35, -19.75], [140.25, -19.5], [140.47, -18.97], [141.0, -18.75], [141.53, -18.97], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.63, -20.3], [142.03, -20.47], [142.25, -21.0], [142.03, -21.53], [141.68, -21.68], [141.54, -22.0], [141.75, -22.5], [141.65, -22.75], [141.75, -23.0], [141.65, -23.25], [141.75, -23.5], [141.53, -24.03], [141.0, -24.25], [140.47, -24.03], [140.32, -23.68], [139.97, -23.53], [139.82, -23.18], [139.75, -23.15], [139.5, -23.25], [139.0, -23.04], [138.5, -23.25], [138.25, -23.15], [138.0, -23.25], [137.47, -23.03], [137.32, -22.68], [136.97, -22.53], [136.82, -22.18], [136.47, -22.03]]]]}, "2025-04-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.47, -22.03], [136.25, -21.5], [136.47, -20.97], [137.0, -20.75], [137.5, -20.96], [138.0, -20.75], [138.25, -20.85], [138.5, -20.75], [138.75, -20.85], [138.82, -20.82], [138.97, -20.47], [139.32, -20.32], [139.47, -19.97], [140.0, -19.75], [140.25, -19.85], [140.32, -19.82], [140.35, -19.75], [140.25, -19.5], [140.47, -18.97], [141.0, -18.75], [141.53, -18.97], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.63, -20.3], [142.03, -20.47], [142.25, -21.0], [142.03, -21.53], [141.68, -21.68], [141.54, -22.0], [141.75, -22.5], [141.65, -22.75], [141.75, -23.0], [141.65, -23.25], [141.75, -23.5], [141.53, -24.03], [141.0, -24.25], [140.47, -24.03], [140.32, -23.68], [139.97, -23.53], [139.82, -23.18], [139.75, -23.15], [139.5, -23.25], [139.0, -23.04], [138.5, -23.25], [138.25, -23.15], [138.0, -23.25], [137.47, -23.03], [137.32, -22.68], [136.97, -22.53], [136.82, -22.18], [136.47, -22.03]]]]}, "2025-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.47, -21.03], [139.25, -20.5], [139.47, -19.97], [140.0, -19.75], [140.25, -19.85], [140.32, -19.82], [140.35, -19.75], [140.25, -19.5], [140.47, -18.97], [141.0, -18.75], [141.53, -18.97], [141.75, -19.5], [141.65, -19.75], [141.75, -20.0], [141.63, -20.3], [142.03, -20.47], [142.25, -21.0], [142.03, -21.53], [141.68, -21.68], [141.53, -22.03], [141.0, -22.25], [140.47, -22.03], [140.32, -21.68], [139.97, -21.53], [139.82, -21.18], [139.47, -21.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.070489433754005}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.789943396578123}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.72564253533028, 19.18396302810828, 19.446363568546815, 21.2758613586426]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.31422068277999, 18.15674997965499, 18.424773152669275, 19.656395212809286]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.088919872010006, -5.471892538600395, -4.9189549090157625, -3.8710834844778867]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.46377383746335, -6.070489433754005, -5.758908665300908, -4.200531750932498]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5732163114418225, -2.1477774923040567, -1.8431096673498588, -1.5837951783063577]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8340952442398706, -3.1411536431688805, -2.6248392590214196, -1.6985418982759197]}}