{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:34.414507", "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-Aug-31_to_2025-Sep-03_135.5_-14.5"}, "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": 2025080000871}, "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": "August 31 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 03 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 92479.17988298825}, "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": ["N.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": ["Arafura Sea"]}, "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": -14.5}, "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": 135.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "135.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 134.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -13.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.5, -14.25], [137.75, -14.35], [138.0, -14.25], [138.25, -14.35], [138.5, -14.25], [139.03, -14.47], [139.18, -14.82], [139.53, -14.97], [139.68, -15.32], [140.03, -15.47], [140.18, -15.82], [140.53, -15.97], [140.75, -16.5], [140.53, -17.03], [140.0, -17.25], [139.75, -17.15], [139.5, -17.25], [138.97, -17.03], [138.82, -16.68], [138.75, -16.65], [138.5, -16.75], [137.97, -16.53], [137.82, -16.18], [137.75, -16.15], [137.5, -16.25], [136.97, -16.03], [136.75, -15.5], [136.85, -15.25], [136.75, -15.0], [136.97, -14.47], [137.5, -14.25]]], [[[135.25, -13.35], [135.5, -13.25], [136.03, -13.47], [136.25, -14.0], [136.15, -14.25], [136.25, -14.5], [136.03, -15.03], [135.5, -15.25], [135.25, -15.15], [135.0, -15.25], [134.75, -15.15], [134.5, -15.25], [133.97, -15.03], [133.75, -14.5], [133.97, -13.97], [134.32, -13.82], [134.47, -13.47], [135.0, -13.25], [135.25, -13.35]]]]}, "2025-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.0, -13.25], [135.25, -13.35], [135.5, -13.25], [135.75, -13.35], [136.0, -13.25], [136.25, 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-13.25], [135.75, -13.35], [136.0, -13.25], [136.25, -13.35], [136.5, -13.25], [136.75, -13.35], [137.0, -13.25], [137.53, -13.47], [137.75, -14.0], [137.65, -14.25], [137.68, -14.32], [137.75, -14.35], [138.0, -14.25], [138.25, -14.35], [138.5, -14.25], [139.03, -14.47], [139.18, -14.82], [139.53, -14.97], [139.68, -15.32], [140.03, -15.47], [140.18, -15.82], [140.53, -15.97], [140.75, -16.5], [140.53, -17.03], [140.0, -17.25], [139.75, -17.15], [139.5, -17.25], [139.0, -17.04], [138.5, -17.25], [137.97, -17.03], [137.82, -16.68], [137.75, -16.65], [137.5, -16.75], [137.25, -16.65], [137.0, -16.75], [136.47, -16.53], [136.25, -16.0], [136.35, -15.75], [136.32, -15.68], [136.25, -15.65], [136.0, -15.75], [135.47, -15.53], [135.32, -15.18], [135.25, -15.15], [135.0, -15.25], [134.75, -15.15], [134.5, -15.25], [133.97, -15.03], [133.75, -14.5], [133.97, -13.97], [134.32, -13.82], [134.47, -13.47], [135.0, -13.25]]]]}, "2025-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[134.47, -15.03], [134.25, -14.5], [134.47, -13.97], [135.0, -13.75], [135.25, -13.85], [135.32, -13.82], [135.47, -13.47], [136.0, -13.25], [136.25, -13.35], [136.5, -13.25], [136.75, -13.35], [137.0, -13.25], [137.53, -13.47], [137.75, -14.0], [137.65, -14.25], [137.68, -14.32], [138.03, -14.47], [138.18, -14.82], [138.53, -14.97], [138.75, -15.5], [138.65, -15.75], [138.68, -15.82], [139.03, -15.97], [139.25, -16.5], [139.03, -17.03], [138.5, -17.25], [137.97, -17.03], [137.82, -16.68], [137.75, -16.65], [137.5, -16.75], [137.25, -16.65], [137.0, -16.75], [136.47, -16.53], [136.25, -16.0], [136.35, -15.75], [136.32, -15.68], [136.25, -15.65], [136.0, -15.75], [135.47, -15.53], [135.32, -15.18], [135.25, -15.15], [135.0, -15.25], [134.47, -15.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.999367348696751}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7237018308678422}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.343690415924698, 22.263670570619695, 22.118442215458117, 22.490110885887816]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.03275578816732, 20.940234120686853, 20.55384470621749, 21.572017923990927]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6860030444171243, -1.6854770627884694, -1.9113165367743712, -1.5136908465004928]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2620172372072602, -3.4995340290768127, -3.999367348696751, -3.0992202601912595]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5264129154792827, -1.6984722327384876, -1.9016558552992944, -1.587679538886463]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6972733762412744, -1.9330207433760476, -2.389360239230261, -1.7849423292959523]}}