{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:13:21.525887", "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": "2021-Sep-05_to_2021-Sep-07_151.5_-29.0"}, "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": 2021090000254}, "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 05 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 07 2021"}, "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": 139637.33018671037}, "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": -29.0}, "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": 151.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "151.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 146.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 152.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[145.25, -28.0], [145.47, -27.47], [146.0, -27.25], [146.25, -27.35], [146.32, -27.32], [146.35, -27.25], [146.25, -27.0], [146.47, -26.47], [147.0, -26.25], [147.25, -26.35], [147.32, -26.32], [147.46, -26.0], [147.25, -25.5], [147.47, -24.97], [148.0, -24.75], [148.25, -24.85], [148.5, -24.75], [148.75, -24.85], [149.0, -24.75], [149.53, -24.97], [149.75, -25.5], [149.53, -26.03], [149.18, -26.18], [149.15, -26.25], [149.2, -26.37], [149.5, -26.25], [149.75, -26.35], [149.82, -26.32], [149.85, -26.25], [149.75, -26.0], [149.97, -25.47], [150.5, -25.25], [151.03, -25.47], [151.18, -25.82], [151.25, -25.85], [151.5, -25.75], [152.03, -25.97], [152.18, -26.32], [152.53, -26.47], [152.75, -27.0], [152.65, -27.25], [152.68, -27.32], [153.03, -27.47], [153.25, -28.0], [153.15, -28.25], [153.25, -28.5], [153.15, -28.75], [153.25, -29.0], [153.03, -29.53], [152.5, -29.75], [152.25, -29.65], [152.0, -29.75], [151.75, -29.65], [151.68, -29.68], [151.53, -30.03], [151.0, -30.25], [150.47, -30.03], [150.3, -29.62], [150.0, -29.75], [149.47, -29.53], [149.25, -29.0], [149.35, -28.75], [149.32, -28.68], [149.25, -28.65], [149.18, -28.68], [149.03, -29.03], [148.5, -29.25], [148.25, -29.15], [148.0, -29.25], [147.75, -29.15], [147.5, -29.25], [147.25, -29.15], [147.0, -29.25], [146.47, -29.03], [146.32, -28.68], [146.25, -28.65], [146.0, -28.75], [145.47, -28.53], [145.25, -28.0]]]]}}, "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": {"2021-09-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[146.0, -28.75], [145.47, -28.53], [145.25, -28.0], [145.47, -27.47], [146.0, -27.25], [146.25, -27.35], [146.32, -27.32], [146.35, -27.25], [146.25, -27.0], [146.47, -26.47], [147.0, -26.25], [147.25, -26.35], [147.32, -26.32], [147.46, -26.0], [147.25, -25.5], [147.47, -24.97], [148.0, -24.75], [148.25, -24.85], [148.5, -24.75], [148.75, -24.85], [149.0, -24.75], 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-28.65], [146.0, -28.75]]]]}, "2021-09-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[146.0, -28.75], [145.47, -28.53], [145.25, -28.0], [145.47, -27.47], [146.0, -27.25], [146.25, -27.35], [146.32, -27.32], [146.35, -27.25], [146.25, -27.0], [146.47, -26.47], [147.0, -26.25], [147.25, -26.35], [147.32, -26.32], [147.46, -26.0], [147.25, -25.5], [147.47, -24.97], [148.0, -24.75], [148.25, -24.85], [148.5, -24.75], [148.75, -24.85], [149.0, -24.75], [149.53, -24.97], [149.75, -25.5], [149.53, -26.03], [149.18, -26.18], [149.15, -26.25], [149.2, -26.37], [149.5, -26.25], [149.75, -26.35], [149.82, -26.32], [149.85, -26.25], [149.75, -26.0], [149.97, -25.47], [150.5, -25.25], [151.03, -25.47], [151.18, -25.82], [151.25, -25.85], [151.5, -25.75], [152.03, -25.97], [152.18, -26.32], [152.53, -26.47], [152.75, -27.0], [152.65, -27.25], [152.68, -27.32], [153.03, -27.47], [153.25, -28.0], [153.15, -28.25], [153.25, -28.5], [153.15, -28.75], [153.25, -29.0], [153.03, 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{"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.869832076777072}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.519096597529916}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.47050952634612, 11.265661308924791, 12.327944249091615]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.125468493845119, 8.11360010108649, 8.717497422018425]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.384553211319435, -4.634707709578176, -3.5380288716921378]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.869832076777072, -5.530231780356644, -4.387658154177473]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8058391587672253, -1.5783502308813746, -1.2501152092521863]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.533122230170671, -1.9914696774610914, -1.7139921716185191]}}