{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:02.820231", "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-May-17_to_2025-May-20_142.0_-23.5"}, "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": 2025050000406}, "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": "May 17 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 20 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": 76356.07448484954}, "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": -23.5}, "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": 142.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "142.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 141.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 146.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[140.82, -22.32], [140.85, -22.25], [140.75, -22.0], [140.97, -21.47], [141.5, -21.25], [142.03, -21.47], [142.18, -21.82], [142.53, -21.97], [142.68, -22.32], [142.75, -22.35], [143.0, -22.25], [143.53, -22.47], [143.75, -23.0], [143.65, -23.25], [143.68, -23.32], [144.03, -23.47], [144.18, -23.82], [144.25, -23.85], [144.32, -23.82], [144.47, -23.47], [145.0, -23.25], [145.53, -23.47], [145.68, -23.82], [146.03, -23.97], [146.18, -24.32], [146.53, -24.47], [146.75, -25.0], [146.53, -25.53], [146.0, -25.75], [145.75, -25.65], [145.5, -25.75], [145.25, -25.65], [145.0, -25.75], [144.47, -25.53], [144.32, -25.18], [144.25, -25.15], [144.0, -25.25], [143.75, -25.15], [143.5, -25.25], [143.25, -25.15], [143.0, -25.25], [142.75, -25.15], [142.5, -25.25], [141.97, -25.03], [141.82, -24.68], [141.47, -24.53], [141.32, -24.18], [140.97, -24.03], [140.82, -23.68], [140.47, -23.53], [140.25, -23.0], [140.47, -22.47], [140.82, -22.32]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia", "E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -23.53], [140.25, -23.0], [140.47, -22.47], [140.82, -22.32], [140.85, -22.25], [140.75, -22.0], [140.97, -21.47], [141.5, -21.25], [142.03, -21.47], [142.18, -21.82], [142.53, -21.97], [142.68, -22.32], [142.75, -22.35], [143.0, -22.25], [143.53, -22.47], [143.75, -23.0], [143.54, -23.5], [143.68, -23.82], [144.03, -23.97], [144.25, -24.5], [144.03, -25.03], [143.5, -25.25], [142.97, -25.03], [142.82, -24.68], [142.75, -24.65], [142.5, -24.75], [141.97, -24.53], [141.82, -24.18], [141.75, -24.15], [141.5, -24.25], [140.97, -24.03], [140.82, -23.68], [140.47, -23.53]]]]}, "2025-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[140.47, -23.53], [140.25, -23.0], [140.47, -22.47], [140.82, -22.32], [140.85, -22.25], [140.75, -22.0], [140.97, -21.47], [141.5, -21.25], [142.03, -21.47], 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.578776147788466}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.06960540044878, 15.427216160150294, 12.99054121794535, 14.54543146204071]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.395637766520224, 13.427303568522177, 11.385307566324911, 13.406795756022177]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.786720300431609, -3.7352295922261485, -6.038438934458683, -4.373355541235976]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.3418066234492585, -4.225181945395377, -6.673620404806229, -5.3311124213106496]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3973263170241306, -1.4212705073177163, -2.274925518262031, -1.622085037260582]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5285143283840896, -1.5743025775301842, -2.4270121174227706, -1.9109563792048252]}}