{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:55.229738", "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-Mar-25_to_2025-Mar-27_144.5_-27.5"}, "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": 2025030000648}, "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": "March 25 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 27 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": 54634.60129384209}, "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": -27.5}, "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": 144.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "144.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 144.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 149.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -28.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -27.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[144.75, -26.85], [145.0, -26.75], [145.53, -26.97], [145.68, -27.32], [145.75, -27.35], [146.0, -27.25], [146.25, -27.35], [146.5, -27.25], [146.75, -27.35], [147.0, -27.25], [147.25, -27.35], [147.5, -27.25], [147.75, -27.35], [147.82, -27.32], [147.85, -27.25], [147.75, -27.0], [147.97, -26.47], [148.5, -26.25], [149.03, -26.47], [149.18, -26.82], [149.25, -26.85], [149.5, -26.75], [150.03, -26.97], [150.25, -27.5], [150.03, -28.03], [149.68, -28.18], [149.53, -28.53], [149.0, -28.75], [148.75, -28.65], [148.5, -28.75], [148.25, -28.65], [148.0, -28.75], [147.75, -28.65], [147.5, -28.75], [147.25, -28.65], [147.0, -28.75], [146.75, -28.65], [146.68, -28.68], [146.53, -29.03], [146.0, -29.25], [145.75, -29.15], [145.5, -29.25], [145.25, -29.15], [145.0, -29.25], [144.47, -29.03], [144.32, -28.68], [144.25, -28.65], [144.0, -28.75], [143.47, -28.53], [143.25, -28.0], [143.47, -27.47], [143.82, -27.32], [143.97, -26.97], [144.5, -26.75], [144.75, -26.85]]]]}}, "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": {"2025-03-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.97, -26.97], [144.5, -26.75], [144.75, -26.85], [145.0, -26.75], [145.53, -26.97], [145.68, -27.32], [145.75, -27.35], [146.0, -27.25], [146.25, -27.35], [146.5, -27.25], [146.75, -27.35], [147.0, -27.25], [147.25, -27.35], [147.5, -27.25], [147.75, -27.35], [147.82, -27.32], [147.85, -27.25], [147.75, -27.0], [147.97, -26.47], [148.5, -26.25], [149.03, -26.47], [149.18, -26.82], [149.25, -26.85], [149.5, -26.75], [150.03, -26.97], [150.25, -27.5], [150.03, -28.03], [149.68, -28.18], [149.53, -28.53], [149.0, -28.75], [148.75, -28.65], [148.5, -28.75], [148.25, -28.65], [148.0, -28.75], [147.75, -28.65], [147.5, -28.75], [147.25, -28.65], [147.0, -28.75], [146.75, -28.65], [146.68, -28.68], [146.53, -29.03], [146.0, -29.25], [145.75, -29.15], [145.5, -29.25], [145.25, -29.15], [145.0, -29.25], [144.47, -29.03], [144.32, -28.68], [144.25, -28.65], [144.0, -28.75], [143.47, -28.53], [143.25, -28.0], [143.47, -27.47], [143.82, -27.32], [143.97, -26.97]]]]}, "2025-03-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.97, -26.97], [144.5, -26.75], [144.75, -26.85], [145.0, -26.75], [145.53, -26.97], [145.68, -27.32], [145.75, -27.35], [146.0, -27.25], [146.25, -27.35], [146.5, -27.25], [146.75, -27.35], [147.0, -27.25], [147.25, -27.35], [147.5, -27.25], [147.75, -27.35], [147.82, -27.32], [147.85, -27.25], [147.75, -27.0], [147.97, -26.47], [148.5, -26.25], [149.03, -26.47], [149.18, -26.82], [149.25, -26.85], [149.5, -26.75], [150.03, -26.97], [150.25, -27.5], [150.03, -28.03], [149.68, -28.18], [149.53, -28.53], [149.0, -28.75], [148.75, -28.65], [148.5, -28.75], [148.25, -28.65], [148.0, -28.75], [147.75, -28.65], [147.5, -28.75], [147.25, -28.65], [147.0, -28.75], [146.75, -28.65], [146.68, -28.68], [146.53, -29.03], [146.0, -29.25], [145.75, -29.15], [145.5, -29.25], [145.25, -29.15], [145.0, -29.25], [144.47, -29.03], [144.32, -28.68], [144.25, -28.65], [144.0, -28.75], [143.47, -28.53], [143.25, -28.0], [143.47, -27.47], [143.82, -27.32], [143.97, -26.97]]]]}, "2025-03-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.97, -26.97], [144.5, -26.75], [144.75, -26.85], [145.0, -26.75], [145.53, -26.97], [145.68, -27.32], [145.75, -27.35], [146.0, -27.25], [146.25, -27.35], [146.5, -27.25], [146.75, -27.35], [147.0, -27.25], [147.25, -27.35], [147.5, -27.25], [147.75, -27.35], [147.82, -27.32], [147.85, -27.25], [147.75, -27.0], [147.97, -26.47], [148.5, -26.25], [149.03, -26.47], [149.18, -26.82], [149.25, -26.85], [149.5, -26.75], [150.03, -26.97], [150.25, -27.5], [150.03, -28.03], [149.68, -28.18], [149.53, -28.53], [149.0, -28.75], [148.75, -28.65], [148.5, -28.75], [148.25, -28.65], [148.0, -28.75], [147.75, -28.65], [147.5, -28.75], [147.25, -28.65], [147.0, -28.75], [146.75, -28.65], [146.68, -28.68], [146.53, -29.03], [146.0, -29.25], [145.75, -29.15], [145.5, -29.25], [145.25, -29.15], [145.0, -29.25], [144.47, -29.03], [144.32, -28.68], [144.25, -28.65], [144.0, -28.75], [143.47, -28.53], [143.25, -28.0], [143.47, -27.47], [143.82, -27.32], [143.97, -26.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.00876503722219}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.5175095423136336}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.40155232747395, 19.43011881510421, 19.8228563944499]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.552728271484398, 19.120568847656273, 19.40093256632491]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.180202566545449, -5.0193151558807525, -4.353010904514699]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.00876503722219, -5.981350129447435, -5.044781450499215]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4076708075659268, -1.705276007476145, -1.4854552137407042]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7179253382611317, -1.8563873322461022, -1.6155684456874806]}}