{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:52:33.542298", "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": "2023-Apr-30_to_2023-May-03_150.5_-27.0"}, "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": 2023040001043}, "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": "April 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 03 2023"}, "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": 66349.37234794225}, "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": -27.0}, "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": 150.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "150.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 149.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 152.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -28.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[148.97, -24.97], [149.5, -24.75], [149.75, -24.85], [150.0, -24.75], [150.53, -24.97], [150.68, -25.32], [150.8, -25.37], [150.97, -24.97], [151.32, -24.82], [151.47, -24.47], [152.0, -24.25], [152.53, -24.47], [152.75, -25.0], [152.53, -25.53], [152.18, -25.68], [152.15, -25.75], [152.25, -26.0], [152.04, -26.5], [152.25, -27.0], [152.15, -27.25], [152.25, -27.5], [152.03, -28.03], [151.5, -28.25], [151.25, -28.15], [151.18, -28.18], [151.03, -28.53], [150.5, -28.75], [149.97, -28.53], [149.82, -28.18], [149.47, -28.03], [149.32, -27.68], [149.25, -27.65], [149.0, -27.75], [148.47, -27.53], [148.25, -27.0], [148.46, -26.5], [148.25, -26.0], [148.47, -25.47], [148.82, -25.32], [148.97, -24.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.25, -26.0], [148.47, -25.47], [148.82, -25.32], [148.97, -24.97], [149.5, -24.75], [149.75, -24.85], [150.0, -24.75], [150.53, -24.97], [150.68, -25.32], [150.8, -25.37], [150.97, -24.97], [151.5, -24.75], [152.03, -24.97], [152.25, -25.5], [152.15, -25.75], [152.25, -26.0], [152.04, -26.5], [152.25, -27.0], [152.15, -27.25], [152.25, -27.5], [152.03, -28.03], [151.5, -28.25], [151.25, -28.15], [151.18, -28.18], [151.03, -28.53], [150.5, -28.75], [149.97, -28.53], [149.82, -28.18], [149.47, -28.03], [149.32, -27.68], [149.25, -27.65], [149.0, -27.75], [148.47, -27.53], [148.25, -27.0], [148.46, -26.5], [148.25, -26.0]]]]}, "2023-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.25, -26.0], [148.47, -25.47], [148.82, -25.32], [148.97, -24.97], [149.5, -24.75], [149.75, -24.85], [150.0, -24.75], [150.53, -24.97], [150.68, -25.32], [150.8, -25.37], [150.97, -24.97], [151.32, -24.82], [151.47, -24.47], [152.0, -24.25], [152.53, -24.47], [152.75, -25.0], [152.53, -25.53], [152.18, -25.68], [152.15, -25.75], [152.25, -26.0], [152.04, -26.5], [152.25, -27.0], [152.15, -27.25], [152.25, -27.5], [152.03, -28.03], [151.5, -28.25], [151.25, -28.15], [151.18, -28.18], [151.03, -28.53], [150.5, -28.75], [149.97, -28.53], [149.82, -28.18], [149.47, -28.03], [149.32, -27.68], [149.25, -27.65], [149.0, -27.75], [148.47, -27.53], [148.25, -27.0], [148.46, -26.5], [148.25, -26.0]]]]}, "2023-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.25, -26.0], [148.47, -25.47], [148.82, -25.32], [148.97, -24.97], [149.5, -24.75], [149.75, -24.85], [150.0, -24.75], [150.53, -24.97], [150.68, -25.32], [150.8, -25.37], [150.97, -24.97], [151.32, -24.82], [151.47, -24.47], [152.0, -24.25], [152.53, -24.47], [152.75, -25.0], [152.53, -25.53], [152.18, -25.68], [152.15, -25.75], [152.25, -26.0], [152.04, -26.5], [152.25, -27.0], [152.15, -27.25], [152.25, -27.5], [152.03, -28.03], [151.5, -28.25], [151.25, -28.15], [151.18, -28.18], [151.03, -28.53], [150.5, -28.75], [149.97, -28.53], [149.82, -28.18], [149.47, -28.03], [149.32, -27.68], [149.25, -27.65], [149.0, -27.75], [148.47, -27.53], [148.25, -27.0], [148.46, -26.5], [148.25, -26.0]]]]}, "2023-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[151.47, -24.47], [152.0, -24.25], [152.53, -24.47], [152.75, -25.0], [152.53, -25.53], [152.0, -25.75], [151.47, -25.53], [151.25, -25.0], [151.47, -24.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.797287250534964}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.02663781005123}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.097696642279345, 12.434099258161211, 14.080796736001844, 17.19317551740727]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.72959836285446, 11.05890633893597, 12.89221230192959, 17.19317551740727]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.295598128955204, -5.869526003839051, -4.028524390248599, -2.5659558996152327]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.253635356138886, -6.797287250534964, -4.895994088064015, -2.5659558996152327]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.0260322457633757, -2.304667323155342, -1.5520990734384827, -1.404859289075321]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.253730814036921, -2.539627069917837, -1.7912407946033844, -1.404859289075321]}}