{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:25:23.737221", "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": "2022-Dec-28_to_2023-Jan-02_133.0_-12.5"}, "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": 2022120001290}, "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": "December 28 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 02 2023"}, "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": 87424.12085275869}, "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": -12.5}, "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": 133.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "133.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 131.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 136.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -14.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[131.75, -11.85], [132.0, -11.75], [132.25, -11.85], [132.5, -11.75], [132.75, -11.85], [132.82, -11.82], [132.97, -11.47], [133.5, -11.25], [133.75, -11.35], [134.0, -11.25], [134.53, -11.47], [134.68, -11.82], [134.75, -11.85], [134.82, -11.82], [134.97, -11.47], [135.5, -11.25], [135.75, -11.35], [136.0, -11.25], [136.25, -11.35], [136.5, -11.25], [137.03, -11.47], [137.25, -12.0], [137.15, -12.25], [137.25, -12.5], [137.03, -13.03], [136.5, -13.25], [136.25, -13.15], [136.18, -13.18], [136.15, -13.25], [136.25, -13.5], [136.03, -14.03], [135.5, -14.25], [134.97, -14.03], [134.82, -13.68], [134.75, -13.65], [134.5, -13.75], [134.25, -13.65], [134.18, -13.68], [134.03, -14.03], [133.68, -14.18], [133.53, -14.53], [133.0, -14.75], [132.47, -14.53], [132.32, -14.18], [132.25, -14.15], [132.0, -14.25], [131.47, -14.03], [131.25, -13.5], [131.38, -13.2], [130.97, -13.03], [130.75, -12.5], [130.97, -11.97], [131.5, -11.75], [131.75, -11.85]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.0, -13.25], [131.47, -13.03], [131.25, -12.5], [131.47, -11.97], [132.0, -11.75], [132.5, -11.96], [133.0, -11.75], [133.53, -11.97], [133.75, -12.5], [133.53, -13.03], [133.0, -13.25], [132.5, -13.04], [132.0, -13.25]]]]}, "2022-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.75, -12.5], [130.97, -11.97], [131.5, -11.75], [131.75, -11.85], [132.0, -11.75], [132.25, -11.85], [132.5, -11.75], [132.75, -11.85], [133.0, -11.75], [133.25, -11.85], [133.5, -11.75], [134.03, -11.97], [134.25, -12.5], [134.15, -12.75], [134.25, -13.0], [134.03, -13.53], [133.68, -13.68], [133.53, -14.03], [133.0, -14.25], [132.75, -14.15], [132.5, -14.25], [132.25, -14.15], [132.0, -14.25], [131.47, -14.03], [131.25, -13.5], [131.38, -13.2], [130.97, -13.03], [130.75, -12.5]]], [[[135.97, -11.47], [136.5, -11.25], [137.03, -11.47], [137.25, -12.0], [137.15, -12.25], [137.25, -12.5], [137.03, -13.03], [136.5, -13.25], [135.97, -13.03], [135.75, -12.5], [135.85, -12.25], [135.75, -12.0], [135.97, -11.47]]]]}, "2022-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, -13.03], [130.75, -12.5], [130.97, -11.97], [131.5, -11.75], [131.75, -11.85], [132.0, -11.75], [132.25, -11.85], [132.5, -11.75], [132.75, -11.85], [132.82, -11.82], [132.97, -11.47], [133.5, -11.25], [133.75, -11.35], [134.0, -11.25], [134.53, -11.47], [134.68, -11.82], [134.75, -11.85], [134.82, -11.82], [134.97, -11.47], [135.5, -11.25], [135.75, -11.35], [136.0, -11.25], [136.25, -11.35], [136.5, -11.25], [137.03, -11.47], [137.25, -12.0], [137.15, -12.25], [137.25, -12.5], [137.03, -13.03], [136.5, -13.25], [136.25, -13.15], [136.18, -13.18], [136.15, -13.25], [136.25, -13.5], [136.03, -14.03], [135.5, -14.25], [134.97, -14.03], [134.82, -13.68], [134.75, -13.65], [134.5, -13.75], [134.25, 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"description": "Maximum t2m anomaly recorded over entire duration", "value": -2.654504849282148}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.0434022966196914}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [26.09487108359599, 25.543678889894977, 25.5508976779833, 25.56197207500145, 25.689658733952854, 25.41138778481701]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.769097688893112, 24.355088191645336, 23.98116812396387, 24.033324211977117, 24.464735476516523, 24.017383880958334]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.658177539110568, -1.916651061921803, -2.105007291955987, -2.1272287476582252, -1.957638764696679, -2.054231350085317]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.7251836786136892, -2.4313147818056677, -2.654504849282148, -2.5899089837874385, -2.5084328402418805, -2.4285242140372247]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2967729339118599, -1.3949629026651778, -1.4892202220892938, -1.4968565229594324, -1.362206207815829, -1.3687053473718527]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3338836714803393, -1.561754781468833, -1.7989719728802285, -1.816950697389734, -1.8799287197974246, -1.6289270378775202]}}