{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:51:52.323630", "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-Mar-30_to_2023-Apr-03_136.5_-23.5"}, "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": 2023030000986}, "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 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 03 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": 64966.178037097554}, "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": -23.5}, "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": 136.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "136.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 135.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[138.18, -23.32], [138.25, -23.35], [138.5, -23.25], [139.03, -23.47], [139.18, -23.82], [139.25, -23.85], [139.5, -23.75], [140.03, -23.97], [140.25, -24.5], [140.03, -25.03], [139.5, -25.25], [139.25, -25.15], [139.18, -25.18], [139.03, -25.53], [138.5, -25.75], [138.25, -25.65], [138.0, -25.75], [137.47, -25.53], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.75, -25.15], [136.5, -25.25], [135.97, -25.03], [135.82, -24.68], [135.47, -24.53], [135.25, -24.0], [135.38, -23.7], [134.97, -23.53], [134.75, -23.0], [134.97, -22.47], [135.5, -22.25], [135.75, -22.35], [136.0, -22.25], [136.25, -22.35], [136.5, -22.25], [136.75, -22.35], [137.0, -22.25], [137.25, -22.35], [137.5, -22.25], [138.03, -22.47], [138.25, -23.0], [138.15, -23.25], [138.18, -23.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-03-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.5, -23.75], [134.97, -23.53], [134.75, -23.0], [134.97, -22.47], [135.5, -22.25], [135.75, -22.35], [136.0, -22.25], [136.25, -22.35], [136.5, -22.25], [136.75, -22.35], [137.0, -22.25], [137.25, -22.35], [137.5, -22.25], [138.03, -22.47], [138.25, -23.0], [138.03, -23.53], [137.5, -23.75], [137.25, -23.65], [137.18, -23.68], [137.03, -24.03], [136.5, -24.25], [135.97, -24.03], [135.82, -23.68], [135.75, -23.65], [135.5, -23.75]]]]}, "2023-03-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[134.97, -23.53], [134.75, -23.0], [134.97, -22.47], [135.5, -22.25], [135.75, -22.35], [136.0, -22.25], [136.25, -22.35], [136.5, -22.25], [136.75, -22.35], [137.0, -22.25], [137.25, -22.35], [137.5, -22.25], [138.03, -22.47], [138.25, -23.0], [138.15, -23.25], [138.18, -23.32], [138.25, -23.35], [138.5, -23.25], [139.03, -23.47], [139.18, -23.82], [139.25, -23.85], [139.5, -23.75], [140.03, -23.97], [140.25, -24.5], [140.03, -25.03], [139.5, -25.25], [139.25, -25.15], [139.18, -25.18], [139.03, -25.53], [138.5, -25.75], [138.25, -25.65], [138.0, -25.75], [137.47, -25.53], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.75, -25.15], [136.5, -25.25], [135.97, -25.03], [135.82, -24.68], [135.47, -24.53], [135.25, -24.0], [135.38, -23.7], [134.97, -23.53]]]]}, "2023-04-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[134.97, -23.53], [134.75, -23.0], [134.97, -22.47], [135.5, -22.25], [135.75, -22.35], [136.0, -22.25], [136.25, -22.35], [136.5, -22.25], [136.75, -22.35], [137.0, -22.25], [137.25, -22.35], [137.5, -22.25], [138.03, -22.47], [138.25, -23.0], [138.15, -23.25], [138.18, -23.32], [138.25, -23.35], [138.5, -23.25], [139.03, -23.47], [139.18, -23.82], [139.25, -23.85], [139.5, -23.75], [140.03, -23.97], [140.25, -24.5], [140.03, -25.03], [139.5, -25.25], [139.25, -25.15], [139.18, -25.18], [139.03, -25.53], [138.5, -25.75], [138.25, -25.65], [138.0, -25.75], [137.47, -25.53], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.75, -25.15], [136.5, -25.25], [135.97, -25.03], [135.82, -24.68], [135.47, -24.53], [135.25, -24.0], [135.38, -23.7], [134.97, -23.53]]]]}, "2023-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, -24.53], [135.25, -24.0], [135.47, -23.47], [135.82, -23.32], [135.97, -22.97], [136.5, -22.75], [136.75, -22.85], [137.0, -22.75], [137.25, -22.85], [137.5, -22.75], [138.03, -22.97], [138.18, -23.32], [138.25, -23.35], [138.5, -23.25], [139.03, -23.47], [139.18, -23.82], [139.25, -23.85], [139.5, -23.75], [140.03, -23.97], [140.25, -24.5], [140.03, -25.03], [139.5, -25.25], [139.25, -25.15], [139.18, -25.18], [139.03, -25.53], [138.5, -25.75], [138.25, -25.65], [138.0, -25.75], [137.47, -25.53], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.75, -25.15], [136.5, -25.25], [135.97, -25.03], [135.82, -24.68], [135.47, -24.53]]]]}, "2023-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, -24.53], [135.25, -24.0], [135.47, -23.47], [135.82, -23.32], [135.97, -22.97], [136.5, -22.75], [136.75, -22.85], [137.0, -22.75], [137.25, -22.85], [137.5, -22.75], [138.03, -22.97], [138.18, -23.32], [138.25, -23.35], [138.5, -23.25], [139.03, -23.47], [139.18, -23.82], [139.53, -23.97], [139.75, -24.5], [139.53, -25.03], [139.18, -25.18], [139.03, -25.53], [138.5, -25.75], [137.97, -25.53], [137.82, -25.18], [137.75, -25.15], [137.5, -25.25], [137.25, -25.15], [137.0, -25.25], [136.75, -25.15], [136.5, -25.25], [135.97, -25.03], [135.82, -24.68], [135.47, -24.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.9720848775251625}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.467427762639885}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.313911693252294, 20.571620362529018, 20.537619665609782, 22.157364664255056, 21.47058509713702]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.16839289564888, 17.969078086474894, 18.463830975566623, 21.3021924142368, 20.395028680149437]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.887566938203368, -5.983385862973216, -6.072144611345737, -4.503533861089254, -5.158285971804215]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.2779583407022415, -6.9720848775251625, -6.843548620403112, -5.43797666626017, -6.2522191800068185]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4821356743318672, -1.8923832360320239, -1.9690591839068379, -1.5325605530489672, -1.7695921465404074]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5963013121580087, -2.1862768213719406, -2.2091489325190774, -1.8461421311681205, -2.1528631969751837]}}