{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:52.555568", "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-Jun-28_to_2025-Jul-02_139.0_-24.5"}, "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": 2025060000938}, "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": "June 28 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 02 2025"}, "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": 159548.96327065452}, "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": -24.5}, "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": 139.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "139.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 129.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.0, -22.25], [137.5, -22.46], [138.0, -22.25], [138.53, -22.47], [138.68, -22.82], [139.03, -22.97], [139.25, -23.5], [139.15, -23.75], [139.18, -23.82], [139.53, -23.97], [139.75, -24.5], [139.53, -25.03], [139.18, -25.18], [139.03, -25.53], [138.68, -25.68], [138.53, -26.03], [138.0, -26.25], [137.47, -26.03], [137.25, -25.5], [137.35, -25.25], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.47, -25.03], [136.32, -24.68], [135.97, -24.53], [135.82, -24.18], [135.76, -24.15], [135.7, -24.12], [135.53, -24.53], [135.0, -24.75], [134.47, -24.53], [134.32, -24.18], [134.25, -24.15], [134.0, -24.25], [133.75, -24.15], [133.5, -24.25], [133.25, -24.15], [133.0, -24.25], [132.47, -24.03], [132.32, -23.68], [131.97, -23.53], [131.82, -23.18], [131.75, -23.15], [131.5, -23.25], [130.97, -23.03], [130.75, -22.5], [130.85, -22.25], [130.75, -22.0], [130.85, -21.75], [130.75, -21.5], [130.85, -21.25], [130.82, -21.18], [130.75, -21.15], [130.5, -21.25], [130.25, -21.15], [130.0, -21.25], [129.5, -21.04], [129.0, -21.25], [128.47, -21.03], [128.25, -20.5], [128.47, -19.97], [128.82, -19.82], [128.97, -19.47], [129.32, -19.32], [129.47, -18.97], [130.0, -18.75], [130.53, -18.97], [130.68, -19.32], [130.75, -19.35], [131.0, -19.25], [131.53, -19.47], [131.68, -19.82], [132.03, -19.97], [132.25, -20.5], [132.15, -20.75], [132.25, -21.0], [132.15, -21.25], [132.18, -21.32], [132.25, -21.35], [132.5, -21.25], [133.03, -21.47], [133.18, -21.82], [133.53, -21.97], [133.7, -22.37], [133.82, -22.32], [133.97, -21.97], [134.5, -21.75], [135.0, -21.96], [135.5, -21.75], [135.75, -21.85], [136.0, -21.75], [136.53, -21.97], [136.68, -22.32], [136.75, -22.35], [137.0, -22.25]]]]}}, "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": {"2025-06-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.47, -20.03], [129.25, -19.5], [129.47, -18.97], [130.0, -18.75], [130.53, -18.97], [130.68, -19.32], [130.75, -19.35], [131.0, -19.25], [131.53, -19.47], [131.68, -19.82], [132.03, -19.97], [132.25, -20.5], [132.15, -20.75], [132.25, -21.0], [132.15, -21.25], [132.18, -21.32], [132.25, -21.35], [132.5, -21.25], [133.03, -21.47], [133.18, -21.82], [133.53, -21.97], [133.7, -22.37], [133.82, -22.32], [133.97, -21.97], [134.5, -21.75], [135.0, -21.96], [135.5, -21.75], [135.75, -21.85], [136.0, -21.75], [136.53, -21.97], [136.7, -22.37], [137.0, -22.25], [137.5, -22.46], [138.0, -22.25], [138.53, -22.47], [138.68, -22.82], [139.03, -22.97], [139.25, -23.5], [139.15, -23.75], [139.18, -23.82], [139.53, -23.97], [139.75, -24.5], [139.53, -25.03], [139.18, -25.18], [139.03, -25.53], [138.68, -25.68], [138.53, -26.03], [138.0, -26.25], [137.47, -26.03], [137.25, -25.5], [137.35, -25.25], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.47, -25.03], [136.32, -24.68], [135.97, -24.53], [135.82, -24.18], [135.7, -24.12], [135.53, -24.53], [135.0, -24.75], [134.47, -24.53], [134.32, -24.18], [134.25, -24.15], [134.0, -24.25], [133.75, -24.15], [133.5, -24.25], [133.25, -24.15], [133.0, -24.25], [132.47, -24.03], [132.32, -23.68], [131.97, -23.53], [131.82, -23.18], [131.75, -23.15], [131.5, -23.25], [130.97, -23.03], [130.75, -22.5], [130.85, -22.25], [130.75, -22.0], [130.85, -21.75], [130.75, -21.5], [130.85, -21.25], [130.82, -21.18], [130.75, -21.15], [130.5, -21.25], [129.97, -21.03], [129.75, -20.5], [129.85, -20.25], [129.82, -20.18], [129.47, -20.03]]]]}, "2025-06-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.97, -19.47], [129.32, -19.32], [129.47, -18.97], [130.0, -18.75], [130.53, -18.97], [130.68, -19.32], [130.75, -19.35], [131.0, -19.25], [131.53, -19.47], [131.68, -19.82], [132.03, -19.97], [132.25, -20.5], [132.15, -20.75], [132.25, -21.0], [132.15, -21.25], [132.18, -21.32], [132.25, -21.35], [132.5, -21.25], [133.03, -21.47], [133.18, -21.82], [133.53, -21.97], [133.7, -22.37], [133.82, -22.32], [133.97, -21.97], [134.5, -21.75], [135.0, -21.96], [135.5, -21.75], [135.75, -21.85], [136.0, -21.75], [136.53, -21.97], [136.7, -22.37], [137.0, -22.25], [137.5, -22.46], [138.0, -22.25], [138.53, -22.47], [138.68, -22.82], [139.03, -22.97], [139.25, -23.5], [139.15, -23.75], [139.18, -23.82], [139.53, -23.97], [139.75, -24.5], [139.53, -25.03], [139.18, -25.18], [139.03, -25.53], [138.68, -25.68], [138.53, -26.03], [138.0, -26.25], [137.47, -26.03], [137.25, -25.5], [137.35, -25.25], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.47, -25.03], [136.32, -24.68], [135.97, -24.53], [135.82, -24.18], [135.7, -24.12], [135.53, -24.53], [135.0, -24.75], [134.47, -24.53], [134.32, -24.18], [134.25, -24.15], [134.0, -24.25], [133.75, -24.15], [133.5, -24.25], [133.25, -24.15], [133.0, -24.25], [132.47, -24.03], [132.32, -23.68], [131.97, -23.53], [131.82, -23.18], [131.75, -23.15], [131.5, -23.25], [130.97, -23.03], [130.75, -22.5], [130.85, -22.25], [130.75, -22.0], [130.85, -21.75], [130.75, -21.5], [130.85, -21.25], [130.82, -21.18], [130.75, -21.15], [130.5, -21.25], [130.25, -21.15], [130.0, -21.25], [129.5, -21.04], [129.0, -21.25], [128.47, -21.03], [128.25, -20.5], [128.47, -19.97], [128.82, -19.82], [128.97, -19.47]]]]}, "2025-06-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.97, -19.47], [129.32, -19.32], [129.47, -18.97], [130.0, -18.75], [130.53, -18.97], [130.68, -19.32], [130.75, -19.35], [131.0, -19.25], [131.53, -19.47], [131.68, -19.82], [132.03, -19.97], [132.25, -20.5], [132.15, -20.75], [132.25, -21.0], [132.15, -21.25], [132.18, -21.32], [132.25, -21.35], [132.5, -21.25], [133.03, -21.47], [133.18, -21.82], [133.53, -21.97], [133.7, -22.37], [133.82, -22.32], [133.97, -21.97], [134.5, -21.75], [135.0, -21.96], [135.5, -21.75], [135.75, -21.85], [136.0, -21.75], [136.53, -21.97], [136.68, -22.32], [136.75, -22.35], [137.0, -22.25], [137.5, -22.46], [138.0, -22.25], [138.53, -22.47], [138.68, -22.82], [139.03, -22.97], [139.25, -23.5], [139.15, -23.75], [139.18, -23.82], [139.53, -23.97], [139.75, -24.5], [139.53, -25.03], [139.18, -25.18], [139.03, -25.53], [138.68, -25.68], [138.53, -26.03], [138.0, -26.25], [137.47, -26.03], [137.25, -25.5], [137.35, -25.25], [137.32, -25.18], [137.25, -25.15], [137.0, -25.25], [136.47, -25.03], [136.32, -24.68], [135.97, -24.53], [135.82, -24.18], [135.7, -24.12], [135.53, -24.53], [135.0, -24.75], [134.47, -24.53], [134.32, -24.18], [134.25, -24.15], [134.0, -24.25], [133.75, -24.15], [133.5, -24.25], [133.25, -24.15], [133.0, -24.25], [132.47, -24.03], [132.32, -23.68], [131.97, -23.53], [131.82, -23.18], [131.75, -23.15], [131.5, -23.25], [130.97, -23.03], [130.75, -22.5], [130.85, -22.25], [130.75, -22.0], [130.85, -21.75], [130.75, -21.5], [130.85, -21.25], [130.82, -21.18], [130.75, -21.15], [130.5, -21.25], [130.25, -21.15], [130.0, -21.25], [129.5, -21.04], [129.0, -21.25], [128.47, -21.03], [128.25, -20.5], [128.47, -19.97], [128.82, -19.82], [128.97, -19.47]]]]}, "2025-07-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[134.97, -21.97], [135.5, -21.75], [135.75, -21.85], [136.0, -21.75], [136.53, -21.97], [136.68, -22.32], [136.75, -22.35], [137.0, -22.25], [137.5, -22.46], [138.0, -22.25], [138.53, -22.47], [138.68, -22.82], [139.03, -22.97], [139.25, -23.5], [139.15, -23.75], [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], [138.25, -25.65], [138.0, -25.75], [137.47, -25.53], [137.32, -25.18], [136.97, -25.03], [136.82, -24.68], [136.47, -24.53], [136.32, -24.18], [136.25, -24.15], [136.0, -24.25], [135.47, -24.03], [135.32, -23.68], [134.97, -23.53], [134.75, -23.0], [134.85, -22.75], [134.75, -22.5], [134.97, -21.97]]], [[[129.5, -19.25], [129.75, -19.35], [130.0, -19.25], [130.25, -19.35], [130.5, -19.25], [130.75, -19.35], [131.0, -19.25], [131.53, -19.47], [131.68, -19.82], [132.03, -19.97], [132.25, -20.5], [132.03, -21.03], [131.5, -21.25], [131.25, -21.15], [131.0, -21.25], [130.75, -21.15], [130.5, -21.25], [130.25, -21.15], [130.0, -21.25], [129.5, -21.04], [129.0, -21.25], [128.47, -21.03], [128.25, -20.5], [128.47, -19.97], [128.82, -19.82], [128.97, -19.47], [129.5, -19.25]]]]}, "2025-07-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, -22.47], [136.0, -22.25], [136.25, -22.35], [136.5, -22.25], [136.75, -22.35], [137.0, -22.25], [137.5, -22.46], [138.0, -22.25], [138.53, -22.47], [138.68, -22.82], [139.03, -22.97], [139.25, -23.5], [139.15, -23.75], [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], [138.25, -25.65], [138.0, -25.75], [137.47, -25.53], [137.32, -25.18], [136.97, -25.03], [136.82, -24.68], [136.47, -24.53], [136.32, -24.18], [136.25, -24.15], [136.0, -24.25], [135.47, -24.03], [135.25, -23.5], [135.35, -23.25], [135.25, -23.0], [135.47, -22.47]]], [[[131.0, -21.25], [130.47, -21.03], [130.25, -20.5], [130.47, -19.97], [131.0, -19.75], [131.53, -19.97], [131.75, -20.5], [131.53, -21.03], [131.0, -21.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.899206048616804}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6954548935843428}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.51302856133907, 10.837166470701561, 10.921425120035735, 11.419637298584007, 10.488410537961954]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.5181073506673215, 7.874702707926474, 8.077756500244163, 9.839139556884788, 9.570647176106775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.7104119710907417, -3.605796786231193, -3.568705830994568, -3.7295162858552207, -4.1729294575968705]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.328772743072648, -4.0840442437632305, -4.1324545849881815, -4.194238161290173, -4.899206048616804]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2500108849828524, -1.2020019812864378, -1.1792042167813908, -1.2569423006219123, -1.4278315118357052]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.415681062971479, -1.3389374077219163, -1.3700437751604453, -1.4332280845037826, -1.7288723638965056]}}