{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:51.481442", "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-Mar-16_to_2025-Mar-20_146.5_-21.0"}, "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": 2025030000461}, "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": "March 16 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 20 2025"}, "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": 69529.88877094573}, "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": -21.0}, "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": 146.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "146.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 145.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 148.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[148.75, -20.5], [148.65, -20.75], [148.75, -21.0], [148.53, -21.53], [148.0, -21.75], [147.75, -21.65], [147.68, -21.68], [147.53, -22.03], [147.0, -22.25], [146.75, -22.15], [146.5, -22.25], [146.25, -22.15], [146.0, -22.25], [145.47, -22.03], [145.25, -21.5], [145.35, -21.25], [145.32, -21.18], [144.97, -21.03], [144.75, -20.5], [144.85, -20.25], [144.75, -20.0], [144.85, -19.75], [144.82, -19.68], [144.47, -19.53], [144.25, -19.0], [144.47, -18.47], [145.0, -18.25], [145.53, -18.47], [145.68, -18.82], [145.75, -18.85], [146.0, -18.75], [146.25, -18.85], [146.5, -18.75], [146.75, -18.85], [147.0, -18.75], [147.53, -18.97], [147.68, -19.32], [148.03, -19.47], [148.18, -19.82], [148.53, -19.97], [148.75, -20.5]]]]}}, "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": {"2025-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.47, -18.47], [145.0, -18.25], [145.53, -18.47], [145.75, -19.0], [145.53, -19.53], [145.0, -19.75], [144.47, -19.53], [144.25, -19.0], [144.47, -18.47]]]]}, "2025-03-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.47, -19.53], [144.25, -19.0], [144.47, -18.47], [145.0, -18.25], [145.53, -18.47], [145.68, -18.82], [145.75, -18.85], [146.0, -18.75], [146.25, -18.85], [146.5, -18.75], [146.75, -18.85], [147.0, -18.75], [147.53, -18.97], [147.68, -19.32], [148.03, -19.47], [148.25, -20.0], [148.03, -20.53], [147.68, -20.68], [147.53, -21.03], [147.18, -21.18], [147.03, -21.53], [146.5, -21.75], [145.97, -21.53], [145.82, -21.18], [145.75, -21.15], [145.5, -21.25], [144.97, -21.03], [144.75, -20.5], [144.85, -20.25], [144.75, -20.0], [144.85, -19.75], [144.82, -19.68], [144.47, -19.53]]]]}, "2025-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.47, -19.53], [144.25, -19.0], [144.47, -18.47], [145.0, -18.25], [145.53, -18.47], [145.68, -18.82], [145.75, -18.85], [146.0, -18.75], [146.25, -18.85], [146.5, -18.75], [146.75, -18.85], [147.0, -18.75], [147.53, -18.97], [147.68, -19.32], [148.03, -19.47], [148.18, -19.82], [148.53, -19.97], [148.75, -20.5], [148.65, -20.75], [148.75, -21.0], [148.53, -21.53], [148.0, -21.75], [147.75, -21.65], [147.68, -21.68], [147.53, -22.03], [147.0, -22.25], [146.75, -22.15], [146.5, -22.25], [146.25, -22.15], [146.0, -22.25], [145.47, -22.03], [145.25, -21.5], [145.35, -21.25], [145.32, -21.18], [144.97, -21.03], [144.75, -20.5], [144.85, -20.25], [144.75, -20.0], [144.85, -19.75], [144.82, -19.68], [144.47, -19.53]]]]}, "2025-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.47, -19.53], [144.25, -19.0], [144.47, -18.47], [145.0, -18.25], [145.53, -18.47], [145.68, -18.82], [145.75, -18.85], [146.0, -18.75], [146.25, -18.85], [146.5, -18.75], [146.75, -18.85], [147.0, -18.75], [147.53, -18.97], [147.68, -19.32], [148.03, -19.47], [148.18, -19.82], [148.53, -19.97], [148.75, -20.5], [148.65, -20.75], [148.75, -21.0], [148.53, -21.53], [148.0, -21.75], [147.75, -21.65], [147.68, -21.68], [147.53, -22.03], [147.0, -22.25], [146.75, -22.15], [146.5, -22.25], [146.25, -22.15], [146.0, -22.25], [145.47, -22.03], [145.25, -21.5], [145.35, -21.25], [145.32, -21.18], [144.97, -21.03], [144.75, -20.5], [144.85, -20.25], [144.75, -20.0], [144.85, -19.75], [144.82, -19.68], [144.47, -19.53]]]]}, "2025-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.25, -21.0], [145.47, -20.47], [146.0, -20.25], [146.25, -20.35], [146.5, -20.25], [146.75, -20.35], [146.82, -20.32], [146.97, -19.97], [147.5, -19.75], [147.75, -19.85], [148.0, -19.75], [148.53, -19.97], [148.75, -20.5], [148.65, -20.75], [148.75, -21.0], [148.53, -21.53], [148.0, -21.75], [147.75, -21.65], [147.68, -21.68], [147.53, -22.03], [147.0, -22.25], [146.75, -22.15], [146.5, -22.25], [146.25, -22.15], [146.0, -22.25], [145.47, -22.03], [145.25, -21.5], [145.35, -21.25], [145.25, -21.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.22060794305952}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.7582626368289067}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.893838500976585, 23.45356903076174, 22.46667124430337, 22.823977406819665, 23.79985376993818]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.893838500976585, 22.502234395345056, 21.295203145345056, 21.814171091715536, 23.13737004597982]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.93538302924469, -2.0693855324630364, -3.2491977554130123, -2.9136398145095157, -2.3227167431008184]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.93538302924469, -2.5422725308601457, -4.22060794305952, -3.7443165415549515, -2.6932563839992554]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.363239066575174, -1.4228364879505875, -2.1076860213477855, -1.8990704331543957, -1.3789661274144769]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.363239066575174, -1.663901531567771, -2.395059154738831, -2.1723024555626567, -1.5369942465447952]}}