{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:28.156382", "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-Apr-22_to_2025-Apr-24_138.0_-19.0"}, "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": 2025040000547}, "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 22 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 24 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 184910.3262464739}, "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": -19.0}, "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": 138.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "138.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 133.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -16.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[132.25, -18.0], [132.35, -17.75], [132.25, -17.5], [132.35, -17.25], [132.25, -17.0], [132.47, -16.47], [132.82, -16.32], [132.97, -15.97], [133.5, -15.75], [134.03, -15.97], [134.18, -16.32], [134.25, -16.35], [134.32, -16.32], [134.47, -15.97], [135.0, -15.75], [135.53, -15.97], [135.7, -16.37], [136.0, -16.25], [136.53, -16.47], [136.68, -16.82], [136.75, -16.85], [137.0, -16.75], [137.25, -16.85], [137.5, -16.75], [137.75, -16.85], [138.0, -16.75], [138.53, -16.97], [138.68, -17.32], [138.75, -17.35], [139.0, -17.25], [139.53, -17.47], [139.68, -17.82], [140.03, -17.97], [140.18, -18.32], [140.53, -18.47], [140.75, -19.0], [140.53, -19.53], [140.0, -19.75], [139.75, -19.65], [139.5, -19.75], [139.25, -19.65], [139.18, -19.68], [139.03, -20.03], [138.68, -20.18], [138.53, -20.53], [138.0, -20.75], [137.75, -20.65], [137.5, -20.75], [136.97, -20.53], [136.82, -20.18], [136.75, -20.15], [136.5, -20.25], [135.97, -20.03], [135.82, -19.68], [135.75, -19.65], [135.5, -19.75], [135.25, -19.65], [135.0, -19.75], [134.47, -19.53], [134.32, -19.18], [134.25, -19.15], [134.0, -19.25], [133.75, -19.15], [133.68, -19.18], [133.53, -19.53], [133.0, -19.75], [132.47, -19.53], [132.25, -19.0], [132.35, -18.75], [132.25, -18.5], [132.35, -18.25], [132.25, -18.0]]]]}}, "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": {"2025-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.25, -18.5], [132.35, -18.25], [132.25, -18.0], [132.35, -17.75], [132.25, -17.5], [132.35, -17.25], [132.25, -17.0], [132.47, -16.47], [132.82, -16.32], [132.97, -15.97], [133.5, -15.75], [134.03, -15.97], [134.18, -16.32], [134.25, -16.35], [134.32, -16.32], [134.47, -15.97], [135.0, -15.75], [135.53, -15.97], [135.7, -16.37], [136.0, -16.25], [136.53, -16.47], [136.68, -16.82], [136.75, -16.85], [137.0, -16.75], [137.25, -16.85], [137.5, -16.75], [137.75, -16.85], [138.0, -16.75], 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-19.15], [133.68, -19.18], [133.53, -19.53], [133.0, -19.75], [132.47, -19.53], [132.25, -19.0], [132.35, -18.75], [132.25, -18.5]]]]}, "2025-04-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.25, -18.5], [132.35, -18.25], [132.25, -18.0], [132.35, -17.75], [132.25, -17.5], [132.35, -17.25], [132.25, -17.0], [132.47, -16.47], [132.82, -16.32], [132.97, -15.97], [133.5, -15.75], [134.03, -15.97], [134.18, -16.32], [134.25, -16.35], [134.32, -16.32], [134.47, -15.97], [135.0, -15.75], [135.53, -15.97], [135.7, -16.37], [136.0, -16.25], [136.53, -16.47], [136.68, -16.82], [136.75, -16.85], [137.0, -16.75], [137.25, -16.85], [137.5, -16.75], [137.75, -16.85], [138.0, -16.75], [138.53, -16.97], [138.68, -17.32], [138.75, -17.35], [139.0, -17.25], [139.53, -17.47], [139.68, -17.82], [140.03, -17.97], [140.18, -18.32], [140.53, -18.47], [140.75, -19.0], [140.53, -19.53], [140.0, -19.75], [139.75, -19.65], [139.5, -19.75], [139.25, -19.65], [139.18, -19.68], [139.03, -20.03], [138.68, -20.18], [138.53, -20.53], [138.0, -20.75], [137.75, -20.65], [137.5, -20.75], [136.97, -20.53], [136.82, -20.18], [136.75, -20.15], [136.5, -20.25], [135.97, -20.03], [135.82, -19.68], [135.75, -19.65], [135.5, -19.75], [135.25, -19.65], [135.0, -19.75], [134.47, -19.53], [134.32, -19.18], [134.25, -19.15], [134.0, -19.25], [133.75, -19.15], [133.68, -19.18], [133.53, -19.53], [133.0, -19.75], [132.47, -19.53], [132.25, -19.0], [132.35, -18.75], [132.25, -18.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.6210095390899255}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.410735148429229}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.013759786615992, 21.14332034802311, 21.981038948341677]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [20.045503234863304, 19.712208048502646, 19.7909980773926]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.38187409058598, -4.97400146471352, -3.876329889988184]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.6210095390899255, -5.613685886851442, -5.344422196204675]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.168372119603169, -2.3614994993517353, -1.7214423588696857]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7640180622961763, -3.063139917777591, -2.259537695386248]}}