{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:23:16.765497", "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": "2021-Feb-22_to_2021-Feb-27_143.5_-38.5"}, "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": 2021020000851}, "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": "February 22 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 136923.8007666768}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Australia"]}, "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": ["Great Australian Bight"]}, "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": -38.5}, "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": 143.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "143.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 139.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 144.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -38.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -33.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.35, -36.25], [139.25, -36.0], [139.35, -35.75], [139.25, -35.5], [139.35, -35.25], [139.25, -35.0], [139.35, -34.75], [139.25, -34.5], [139.35, -34.25], [139.25, -34.0], [139.35, -33.75], [139.25, -33.5], [139.47, -32.97], [140.0, -32.75], [140.25, -32.85], [140.5, -32.75], [140.75, -32.85], [141.0, -32.75], [141.53, -32.97], [141.68, -33.32], [142.03, -33.47], [142.25, -34.0], [142.03, -34.53], [141.68, -34.68], [141.65, -34.75], [141.68, -34.82], [141.75, -34.85], [142.0, -34.75], [142.53, -34.97], [142.68, -35.32], [143.03, -35.47], [143.18, -35.82], [143.53, -35.97], [143.75, -36.5], [143.63, -36.8], [143.75, -36.85], [144.0, -36.75], [144.53, -36.97], [144.75, -37.5], [144.65, -37.75], [144.75, -38.0], [144.65, -38.25], [144.75, -38.5], [144.53, -39.03], [144.0, -39.25], [143.75, -39.15], [143.5, -39.25], [143.25, -39.15], [143.0, -39.25], [142.75, -39.15], [142.5, -39.25], [141.97, -39.03], [141.82, -38.68], [141.75, -38.65], [141.5, -38.75], [140.97, -38.53], [140.82, -38.18], [140.75, -38.15], [140.5, -38.25], [139.97, -38.03], [139.82, -37.68], [139.47, -37.53], [139.25, -37.0], [139.35, -36.75], [139.25, -36.5], [139.35, -36.25]]]]}, "2021-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.35, -36.25], [139.25, -36.0], [139.35, -35.75], [139.25, -35.5], [139.35, -35.25], [139.25, -35.0], [139.35, -34.75], [139.25, -34.5], [139.35, -34.25], [139.25, -34.0], [139.35, -33.75], [139.25, -33.5], [139.47, -32.97], [140.0, -32.75], [140.25, -32.85], [140.5, -32.75], [140.75, -32.85], [141.0, -32.75], [141.53, -32.97], [141.68, -33.32], [142.03, -33.47], [142.25, -34.0], [142.03, -34.53], [141.68, -34.68], [141.65, -34.75], [141.68, -34.82], [141.75, -34.85], [142.0, -34.75], [142.53, -34.97], [142.68, -35.32], [143.03, -35.47], [143.18, -35.82], [143.53, -35.97], [143.75, -36.5], [143.63, -36.8], [143.75, -36.85], [144.0, -36.75], [144.53, -36.97], [144.75, -37.5], [144.65, -37.75], [144.75, -38.0], [144.65, -38.25], [144.75, -38.5], [144.53, -39.03], [144.0, -39.25], [143.75, -39.15], [143.5, -39.25], [143.25, -39.15], [143.0, -39.25], [142.75, -39.15], [142.5, -39.25], [141.97, -39.03], [141.82, -38.68], [141.75, -38.65], [141.5, -38.75], [140.97, -38.53], [140.82, -38.18], [140.75, -38.15], [140.5, -38.25], [139.97, -38.03], [139.82, -37.68], [139.47, -37.53], [139.25, -37.0], [139.35, -36.75], [139.25, -36.5], [139.35, -36.25]]]]}, "2021-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.35, -36.25], [139.25, -36.0], [139.35, -35.75], [139.25, -35.5], [139.35, -35.25], [139.25, -35.0], [139.35, -34.75], [139.25, -34.5], [139.35, -34.25], [139.25, -34.0], [139.35, -33.75], [139.25, -33.5], [139.47, -32.97], [140.0, -32.75], [140.25, -32.85], [140.5, -32.75], [140.75, -32.85], [141.0, -32.75], [141.53, -32.97], [141.68, -33.32], [142.03, -33.47], [142.25, -34.0], [142.03, -34.53], [141.68, -34.68], [141.65, -34.75], [141.68, -34.82], [141.75, -34.85], [142.0, -34.75], [142.53, -34.97], [142.68, -35.32], [143.03, -35.47], [143.18, -35.82], [143.53, -35.97], [143.75, -36.5], [143.63, -36.8], [143.75, -36.85], [144.0, -36.75], [144.53, -36.97], [144.75, -37.5], [144.65, -37.75], [144.75, -38.0], [144.65, -38.25], [144.75, -38.5], [144.53, -39.03], [144.0, -39.25], [143.75, -39.15], [143.5, -39.25], [143.25, -39.15], [143.0, -39.25], [142.75, -39.15], [142.5, -39.25], [141.97, -39.03], [141.82, -38.68], [141.75, -38.65], [141.5, -38.75], [140.97, -38.53], [140.82, -38.18], [140.75, -38.15], [140.5, -38.25], [139.97, -38.03], [139.82, -37.68], [139.47, -37.53], [139.25, -37.0], [139.35, -36.75], [139.25, -36.5], [139.35, -36.25]]]]}, "2021-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.97, -39.03], [142.75, -38.5], [142.97, -37.97], [143.5, -37.75], [144.03, -37.97], [144.25, -38.5], [144.03, -39.03], [143.5, -39.25], [142.97, -39.03]]], [[[140.97, -38.53], [140.75, -38.0], [140.97, -37.47], [141.5, -37.25], [142.03, -37.47], [142.25, -38.0], [142.03, -38.53], [141.5, -38.75], [140.97, -38.53]]]]}, "2021-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.97, -39.03], [142.75, -38.5], [142.97, -37.97], [143.5, -37.75], [144.03, -37.97], [144.25, -38.5], [144.03, -39.03], [143.5, -39.25], [142.97, -39.03]]], [[[140.97, -38.53], [140.75, -38.0], [140.97, -37.47], [141.5, -37.25], [142.03, -37.47], [142.25, -38.0], [142.03, -38.53], [141.5, -38.75], [140.97, -38.53]]]]}, "2021-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.97, -39.03], [142.75, -38.5], [142.97, -37.97], [143.5, -37.75], [144.03, -37.97], [144.25, -38.5], [144.03, -39.03], [143.5, -39.25], [142.97, -39.03]]], [[[140.97, -38.53], [140.75, -38.0], [140.97, -37.47], [141.5, -37.25], [142.03, -37.47], [142.25, -38.0], [142.03, -38.53], [141.5, -38.75], [140.97, -38.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.23452633548078}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.73117873330275}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.364329022036713, 14.533758196882559, 14.721999731334563, 13.448272986119548, 13.105279683107028, 13.617046941512854]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.640402767104604, 10.983834560544153, 11.57957375150744, 13.099502254769789, 12.985215425247134, 13.377947737738054]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.353088648340771, -6.1226328732920035, -5.913489060802446, -3.984244865644456, -4.191524701899908, -3.6367211128720385]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.1484158279146754, -7.037547009229911, -7.23452633548078, -4.022068496593363, -4.617020495284294, -3.7102737117739935]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3192640020975153, -1.493007169674888, -1.456499834380788, -1.1195185581965763, -1.1995382766662748, -1.0636608241812864]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4354302032816197, -1.6694971379402623, -1.6946633153468644, -1.2118669328355107, -1.2380353994242113, -1.1224649982785528]}}