{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:12.022926", "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": "2023-Apr-01_to_2023-Apr-05_141.5_-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": 2023040000024}, "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 01 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 05 2023"}, "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": 57980.63537203251}, "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": 141.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "141.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 140.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 142.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -22.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -18.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[142.03, -21.97], [142.25, -22.5], [142.03, -23.03], [141.5, -23.25], [140.97, -23.03], [140.82, -22.68], [140.75, -22.65], [140.5, -22.75], [139.97, -22.53], [139.75, -22.0], [139.97, -21.47], [140.32, -21.32], [140.46, -21.0], [140.32, -20.68], [139.97, -20.53], [139.75, -20.0], [139.85, -19.75], [139.75, -19.5], [139.85, -19.25], [139.75, -19.0], [139.97, -18.47], [140.5, -18.25], [140.75, -18.35], [141.0, -18.25], [141.25, -18.35], [141.32, -18.32], [141.47, -17.97], [142.0, -17.75], [142.53, -17.97], [142.75, -18.5], [142.53, -19.03], [142.18, -19.18], [142.15, -19.25], [142.18, -19.32], [142.53, -19.47], [142.75, -20.0], [142.65, -20.25], [142.75, -20.5], [142.65, -20.75], [142.75, -21.0], [142.53, -21.53], [142.0, -21.75], [141.75, -21.65], [141.68, -21.68], [141.65, -21.75], [141.68, -21.82], [142.03, -21.97]]]]}}, "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": {"2023-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -21.47], [141.0, -21.25], [141.53, -21.47], [141.75, -22.0], [141.53, -22.53], [141.0, -22.75], [140.47, -22.53], [140.25, -22.0], [140.47, -21.47]]]]}, "2023-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.75, -19.5], [139.97, -18.97], [140.32, -18.82], [140.47, -18.47], [141.0, -18.25], [141.25, -18.35], [141.32, -18.32], [141.47, -17.97], [142.0, -17.75], [142.53, -17.97], [142.75, -18.5], [142.53, -19.03], [142.18, -19.18], [142.15, -19.25], [142.18, -19.32], [142.53, -19.47], [142.75, -20.0], [142.65, -20.25], [142.75, -20.5], [142.65, -20.75], [142.75, -21.0], [142.53, -21.53], [142.0, -21.75], [141.75, -21.65], [141.68, -21.68], [141.65, -21.75], [141.68, -21.82], [142.03, -21.97], [142.25, -22.5], [142.03, -23.03], [141.5, -23.25], [140.97, -23.03], [140.82, -22.68], [140.75, -22.65], [140.5, -22.75], [139.97, -22.53], [139.75, -22.0], [139.97, -21.47], [140.32, -21.32], [140.46, -21.0], [140.32, -20.68], [139.97, -20.53], [139.75, -20.0], [139.85, -19.75], [139.75, -19.5]]]]}, "2023-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.75, -19.5], [139.85, -19.25], [139.75, -19.0], [139.97, -18.47], [140.5, -18.25], [140.75, -18.35], [141.0, -18.25], [141.25, -18.35], [141.32, -18.32], [141.47, -17.97], [142.0, -17.75], [142.53, -17.97], [142.75, -18.5], [142.53, -19.03], [142.18, -19.18], [142.15, -19.25], [142.18, -19.32], [142.53, -19.47], [142.75, -20.0], [142.65, -20.25], [142.75, -20.5], [142.65, -20.75], [142.75, -21.0], [142.53, -21.53], [142.0, -21.75], [141.75, -21.65], [141.68, -21.68], [141.65, -21.75], [141.68, -21.82], [142.03, -21.97], [142.25, -22.5], [142.03, -23.03], [141.5, -23.25], [140.97, -23.03], [140.82, -22.68], [140.75, -22.65], [140.5, -22.75], [139.97, -22.53], [139.75, -22.0], [139.97, -21.47], [140.32, -21.32], [140.46, -21.0], [140.32, -20.68], [139.97, -20.53], [139.75, -20.0], [139.85, -19.75], [139.75, -19.5]]]]}, "2023-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.75, -19.5], [139.85, -19.25], [139.75, -19.0], [139.97, -18.47], [140.5, -18.25], [140.75, -18.35], [141.0, -18.25], [141.25, -18.35], [141.32, -18.32], [141.47, -17.97], [142.0, -17.75], [142.53, -17.97], [142.75, -18.5], [142.53, -19.03], [142.18, -19.18], [142.15, -19.25], [142.18, -19.32], [142.53, -19.47], [142.75, -20.0], [142.65, -20.25], [142.75, -20.5], [142.65, -20.75], [142.75, -21.0], [142.53, -21.53], [142.0, -21.75], [141.75, -21.65], [141.68, -21.68], [141.65, -21.75], [141.68, -21.82], [142.03, -21.97], [142.25, -22.5], [142.03, -23.03], [141.5, -23.25], [140.97, -23.03], [140.82, -22.68], [140.75, -22.65], [140.5, -22.75], [139.97, -22.53], [139.75, -22.0], [139.97, -21.47], [140.32, -21.32], [140.46, -21.0], [140.32, -20.68], [139.97, -20.53], [139.75, -20.0], [139.85, -19.75], [139.75, -19.5]]]]}, "2023-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.97, -19.53], [139.75, -19.0], [139.97, -18.47], [140.5, -18.25], [140.75, -18.35], [141.0, -18.25], [141.25, -18.35], [141.32, -18.32], [141.47, -17.97], [142.0, -17.75], [142.53, -17.97], [142.75, -18.5], [142.53, -19.03], [142.18, -19.18], [142.15, -19.25], [142.18, -19.32], [142.53, -19.47], [142.75, -20.0], [142.65, -20.25], [142.75, -20.5], [142.53, -21.03], [142.0, -21.25], [141.75, -21.15], [141.5, -21.25], [140.97, -21.03], [140.82, -20.68], [140.47, -20.53], [140.25, -20.0], [140.35, -19.75], [140.32, -19.68], [139.97, -19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.532564814483749}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.272829364195457}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.169015626568466, 24.438952303766996, 25.31654862479877, 24.875354265462704, 25.92740759863011]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.169015626568466, 22.53165255421669, 23.324895458493017, 22.637462515885886, 25.55700637113972]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.234634138937281, -3.880223331917648, -2.9699297190460525, -3.3104887633080464, -2.653080840122743]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.234634138937281, -4.532564814483749, -3.498535921104917, -4.083613685696548, -3.1875389328040455]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3704465142524143, -2.015940768020242, -1.5833512545777697, -1.7560758708223538, -1.4623910991118811]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3704465142524143, -2.5443426514802243, -1.8312411470696361, -2.14842848319393, -1.796095514215025]}}