{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:51.147410", "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_140.5_-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": 2025030000462}, "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": 181768.3170793912}, "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": 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": 139.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 144.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.0}, "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": [[[[138.85, -19.25], [138.75, -19.0], [138.97, -18.47], [139.32, -18.32], [139.35, -18.25], [139.25, -18.0], [139.47, -17.47], [139.82, -17.32], [139.97, -16.97], [140.32, -16.82], [140.47, -16.47], [140.82, -16.32], [140.85, -16.25], [140.75, -16.0], [140.85, -15.75], [140.75, -15.5], [140.97, -14.97], [141.5, -14.75], [141.75, -14.85], [142.0, -14.75], [142.53, -14.97], [142.75, -15.5], [142.65, -15.75], [142.68, -15.82], [143.03, -15.97], [143.18, -16.32], [143.25, -16.35], [143.5, -16.25], [144.03, -16.47], [144.25, -17.0], [144.15, -17.25], [144.18, -17.32], [144.53, -17.47], [144.75, -18.0], [144.53, -18.53], [144.0, -18.75], [143.75, -18.65], [143.63, -18.7], [143.75, -19.0], [143.53, -19.53], [143.18, -19.68], [143.03, -20.03], [142.68, -20.18], [142.53, -20.53], [142.0, -20.75], [141.75, -20.65], [141.68, -20.68], [141.65, -20.75], [141.75, -21.0], [141.53, -21.53], [141.0, -21.75], [140.75, -21.65], [140.5, -21.75], [139.97, -21.53], [139.82, -21.18], [139.75, -21.15], [139.5, -21.25], [138.97, -21.03], [138.75, -20.5], [138.85, -20.25], [138.75, -20.0], [138.85, -19.75], [138.75, -19.5], [138.85, -19.25]]]]}}, "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": {"2025-03-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -16.97], [140.82, -16.82], [140.85, -16.75], [140.75, -16.5], [140.85, -16.25], [140.75, -16.0], [140.85, -15.75], [140.75, -15.5], [140.97, -14.97], [141.5, -14.75], [141.75, -14.85], [142.0, -14.75], [142.53, -14.97], [142.75, -15.5], [142.65, -15.75], [142.68, -15.82], [143.03, -15.97], [143.18, -16.32], [143.25, -16.35], [143.5, -16.25], [144.03, -16.47], [144.25, -17.0], [144.15, -17.25], [144.18, -17.32], [144.53, -17.47], [144.75, -18.0], [144.53, -18.53], [144.0, -18.75], [143.75, -18.65], [143.5, -18.75], [143.25, -18.65], [143.18, -18.68], [143.03, -19.03], [142.5, -19.25], [141.97, -19.03], [141.8, 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[25.78055412096853, 26.222721972766237, 25.364430138372654, 25.999688373912477, 25.83531778508967]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.3790273030599, 24.707149759928427, 24.080929056803427, 25.137169138590536, 24.913411712646507]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0480199266763615, -1.9836163088194119, -3.3251545903355173, -2.8406678473339784, -2.9990975729859968]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.8589528622374587, -2.679577743171251, -4.967074435315112, -4.228371773073036, -4.777465560096346]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7793322105572513, -1.5828774850614349, -2.1108804208748464, -1.7658954364239137, -1.8522799977945035]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3755613824432964, -2.1106184314333816, -2.6573619469064766, -2.3078615567830596, -2.8030680041382072]}}