{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:39.984450", "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-Sep-21_to_2025-Sep-25_129.0_-18.0"}, "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": 2025090000556}, "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": "September 21 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 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": 184640.01250642602}, "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": -18.0}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 132.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -20.5}, "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": [[[[125.82, -18.32], [125.85, -18.25], [125.82, -18.18], [125.47, -18.03], [125.25, -17.5], [125.47, -16.97], [126.0, -16.75], [126.25, -16.85], [126.32, -16.82], [126.47, -16.47], [126.82, -16.32], [126.97, -15.97], [127.5, -15.75], [128.03, -15.97], [128.25, -16.5], [128.13, -16.8], [128.25, -16.85], [128.5, -16.75], [128.75, -16.85], [128.82, -16.82], [128.97, -16.47], [129.5, -16.25], [129.75, -16.35], [130.0, -16.25], [130.53, -16.47], [130.68, -16.82], [131.0, -16.96], [131.5, -16.75], [131.75, -16.85], [132.0, -16.75], [132.53, -16.97], [132.75, -17.5], [132.65, -17.75], [132.75, -18.0], [132.65, -18.25], [132.75, -18.5], [132.53, -19.03], [132.0, -19.25], [131.75, -19.15], [131.5, -19.25], [131.25, -19.15], [131.0, -19.25], [130.75, -19.15], [130.5, -19.25], [130.25, -19.15], [130.13, -19.2], [130.18, -19.32], [130.53, -19.47], [130.75, -20.0], [130.53, -20.53], [130.0, -20.75], [129.75, -20.65], [129.5, -20.75], [129.25, -20.65], [129.18, -20.68], [129.03, -21.03], [128.5, -21.25], [127.97, -21.03], [127.82, -20.68], [127.75, -20.65], [127.5, -20.75], [127.25, -20.65], [127.18, -20.68], [127.03, -21.03], [126.5, -21.25], [125.97, -21.03], [125.75, -20.5], [125.96, -20.0], [125.82, -19.68], [125.47, -19.53], [125.25, -19.0], [125.47, -18.47], [125.82, -18.32]]]]}}, "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": {"2025-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.25, -18.0], [129.35, -17.75], [129.25, -17.5], [129.47, -16.97], [130.0, -16.75], [130.53, -16.97], [130.68, -17.32], [130.75, -17.35], [130.82, -17.32], [130.97, -16.97], [131.5, -16.75], [131.75, -16.85], [132.0, -16.75], [132.53, -16.97], [132.75, -17.5], [132.65, -17.75], [132.75, -18.0], [132.65, -18.25], [132.75, -18.5], [132.53, -19.03], [132.0, -19.25], [131.75, -19.15], [131.5, -19.25], [131.25, -19.15], [131.0, -19.25], [130.75, -19.15], [130.5, -19.25], [130.25, -19.15], [130.0, -19.25], [129.47, -19.03], [129.25, -18.5], [129.35, -18.25], [129.25, -18.0]]]]}, "2025-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.25, -17.5], [128.47, -16.97], [128.82, -16.82], [128.97, -16.47], [129.5, -16.25], [129.75, -16.35], [130.0, -16.25], [130.53, -16.47], [130.68, -16.82], [131.0, -16.96], [131.5, -16.75], [131.75, -16.85], [132.0, -16.75], [132.53, -16.97], [132.75, -17.5], [132.65, -17.75], [132.75, -18.0], [132.65, -18.25], [132.75, -18.5], [132.53, -19.03], [132.0, -19.25], [131.75, -19.15], [131.5, -19.25], [131.25, -19.15], [131.0, -19.25], [130.75, -19.15], [130.5, -19.25], [130.25, -19.15], [130.0, -19.25], [129.75, -19.15], [129.68, -19.18], [129.53, -19.53], [129.0, -19.75], [128.47, -19.53], [128.25, -19.0], [128.46, -18.5], [128.25, -18.0], [128.35, -17.75], [128.25, -17.5]]]]}, "2025-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.47, -19.53], [125.25, -19.0], [125.47, -18.47], [125.82, -18.32], [125.85, -18.25], [125.82, -18.18], [125.47, -18.03], [125.25, -17.5], [125.47, -16.97], [126.0, -16.75], [126.25, -16.85], [126.32, -16.82], [126.47, -16.47], [126.82, -16.32], [126.97, -15.97], [127.5, -15.75], [128.03, -15.97], [128.25, -16.5], [128.13, -16.8], [128.25, -16.85], [128.5, -16.75], [128.75, -16.85], [128.82, -16.82], [128.97, -16.47], [129.5, -16.25], [129.75, -16.35], [130.0, -16.25], [130.53, -16.47], [130.68, -16.82], [131.0, -16.96], [131.5, -16.75], [131.75, -16.85], [132.0, -16.75], [132.53, -16.97], [132.75, -17.5], [132.65, -17.75], [132.75, -18.0], [132.65, -18.25], [132.75, -18.5], [132.53, -19.03], [132.0, -19.25], [131.75, -19.15], [131.5, -19.25], [131.25, -19.15], [131.0, -19.25], [130.75, -19.15], [130.5, -19.25], [130.25, -19.15], [130.13, -19.2], [130.18, -19.32], [130.53, -19.47], [130.75, -20.0], [130.53, -20.53], [130.0, -20.75], [129.75, -20.65], [129.5, -20.75], [129.25, -20.65], [129.18, -20.68], [129.03, -21.03], [128.5, -21.25], [127.97, -21.03], [127.82, -20.68], [127.75, -20.65], [127.5, -20.75], [127.25, -20.65], [127.18, -20.68], [127.03, -21.03], [126.5, -21.25], [125.97, -21.03], [125.75, -20.5], [125.96, -20.0], [125.82, -19.68], [125.47, -19.53]]]]}, "2025-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.47, -19.53], [125.25, -19.0], [125.47, -18.47], [125.82, -18.32], [125.85, -18.25], [125.82, -18.18], [125.47, -18.03], [125.25, -17.5], [125.47, -16.97], [126.0, -16.75], [126.25, -16.85], [126.32, -16.82], [126.47, -16.47], [126.82, -16.32], [126.97, -15.97], [127.5, -15.75], [128.03, -15.97], [128.25, -16.5], [128.13, -16.8], [128.25, -16.85], [128.5, -16.75], [128.75, -16.85], [128.82, -16.82], [128.97, -16.47], [129.5, -16.25], [129.75, -16.35], [130.0, -16.25], [130.53, -16.47], [130.68, -16.82], [131.03, -16.97], [131.18, -17.32], [131.25, -17.35], [131.5, -17.25], [132.03, -17.47], [132.25, -18.0], [132.15, -18.25], [132.25, -18.5], [132.03, -19.03], [131.5, -19.25], [131.25, -19.15], [131.0, -19.25], [130.75, -19.15], [130.5, -19.25], [130.25, -19.15], [130.13, -19.2], [130.18, -19.32], [130.53, -19.47], [130.75, -20.0], [130.53, -20.53], [130.0, -20.75], [129.75, -20.65], [129.5, -20.75], [129.25, -20.65], [129.18, -20.68], [129.03, -21.03], [128.5, -21.25], [127.97, -21.03], [127.82, -20.68], [127.75, -20.65], [127.5, -20.75], [127.25, -20.65], [127.18, -20.68], [127.03, -21.03], [126.5, -21.25], [125.97, -21.03], [125.75, -20.5], [125.96, -20.0], [125.82, -19.68], [125.47, -19.53]]]]}, "2025-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.47, -19.53], [125.25, -19.0], [125.47, -18.47], [125.82, -18.32], [125.85, -18.25], [125.82, -18.18], [125.47, -18.03], [125.25, -17.5], [125.47, -16.97], [126.0, -16.75], [126.25, -16.85], [126.32, -16.82], [126.47, -16.47], [126.82, -16.32], [126.97, -15.97], [127.5, -15.75], [128.03, -15.97], [128.25, -16.5], [128.13, -16.8], [128.25, -16.85], [128.5, -16.75], [129.03, -16.97], [129.18, -17.32], [129.53, -17.47], [129.68, -17.82], [130.03, -17.97], [130.25, -18.5], [130.04, -19.0], [130.18, -19.32], [130.53, -19.47], [130.75, -20.0], [130.53, -20.53], [130.0, -20.75], [129.75, -20.65], [129.5, -20.75], [129.25, -20.65], [129.18, -20.68], [129.03, -21.03], [128.5, -21.25], [127.97, -21.03], [127.82, -20.68], [127.75, -20.65], [127.5, -20.75], [127.25, -20.65], [127.18, -20.68], [127.03, -21.03], [126.5, -21.25], [125.97, -21.03], [125.75, -20.5], [125.96, -20.0], [125.82, -19.68], [125.47, -19.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.078392184322354}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9687232494951123}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.315274419540003, 24.94333177046343, 24.20120967077827, 24.059543152717538, 25.260913409608747]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.7499824523926, 23.733740743001306, 22.54800949096682, 22.229604339599632, 23.220119730631552]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.783819803970324, -3.4139398051051497, -4.137814548345851, -4.451228549758339, -3.411641795524096]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.4275232982342345, -3.8649473036841187, -4.8188858598898605, -5.078392184322354, -4.363469826396056]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4586607215332243, -1.3575080417414032, -1.7633980881978017, -1.9912859927397328, -1.6339307937151342]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7548018264188805, -1.4830089182864992, -2.1236077454229156, -2.4631332554005936, -1.8195032364327304]}}