{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:05.330622", "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-23_to_2025-May-25_121.0_-32.5"}, "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": 2025050000547}, "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 23 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 25 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": 54730.77814143621}, "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": -32.5}, "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": 121.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "121.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 125.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -33.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[118.75, -32.0], [118.97, -31.47], [119.5, -31.25], [119.75, -31.35], [120.0, -31.25], [120.25, -31.35], [120.5, -31.25], [120.75, -31.35], [121.0, -31.25], [121.25, -31.35], [121.5, -31.25], [121.75, -31.35], [122.0, -31.25], [122.5, -31.46], [123.0, -31.25], [123.53, -31.47], [123.68, -31.82], [124.03, -31.97], [124.18, -32.32], [124.25, -32.35], [124.5, -32.25], [124.75, -32.35], [125.0, -32.25], [125.25, -32.35], [125.5, -32.25], [126.03, -32.47], [126.25, -33.0], [126.03, -33.53], [125.5, -33.75], [125.25, -33.65], [125.0, -33.75], [124.75, -33.65], [124.5, -33.75], [124.25, -33.65], [124.0, -33.75], [123.75, -33.65], [123.5, -33.75], [123.25, -33.65], [123.0, -33.75], [122.75, -33.65], [122.5, -33.75], [122.25, -33.65], [122.0, -33.75], [121.47, -33.53], [121.32, -33.18], [121.25, -33.15], [121.0, -33.25], [120.47, -33.03], [120.32, -32.68], [120.25, -32.65], [120.0, -32.75], [119.75, -32.65], [119.5, -32.75], [118.97, -32.53], [118.75, -32.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.5, -32.75], [118.97, -32.53], [118.75, -32.0], [118.97, -31.47], [119.5, -31.25], [119.75, -31.35], [120.0, -31.25], [120.25, -31.35], [120.5, -31.25], [120.75, -31.35], [121.0, -31.25], [121.25, -31.35], [121.5, -31.25], [121.75, -31.35], [122.0, -31.25], [122.5, -31.46], [123.0, -31.25], [123.53, -31.47], [123.68, -31.82], [124.03, -31.97], [124.18, -32.32], [124.25, -32.35], [124.5, -32.25], [124.75, -32.35], [125.0, -32.25], [125.25, -32.35], [125.5, -32.25], [126.03, -32.47], [126.25, -33.0], [126.03, -33.53], [125.5, -33.75], [125.25, -33.65], [125.0, -33.75], [124.75, -33.65], [124.5, -33.75], [124.25, -33.65], [124.0, -33.75], [123.75, -33.65], [123.5, -33.75], [123.25, -33.65], [123.0, -33.75], [122.75, -33.65], [122.5, -33.75], [122.25, -33.65], [122.0, -33.75], [121.47, -33.53], [121.32, -33.18], [121.25, -33.15], [121.0, -33.25], [120.47, -33.03], [120.32, -32.68], [120.25, -32.65], [120.0, -32.75], [119.75, -32.65], [119.5, -32.75]]]]}, "2025-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.5, -32.75], [118.97, -32.53], [118.75, -32.0], [118.97, -31.47], [119.5, -31.25], [119.75, -31.35], [120.0, -31.25], [120.25, -31.35], [120.5, -31.25], [120.75, -31.35], [121.0, -31.25], [121.25, -31.35], [121.5, -31.25], [121.75, -31.35], [122.0, -31.25], [122.5, -31.46], [123.0, -31.25], [123.53, -31.47], [123.68, -31.82], [124.03, -31.97], [124.18, -32.32], [124.25, -32.35], [124.5, -32.25], [124.75, -32.35], [125.0, -32.25], [125.25, -32.35], [125.5, -32.25], [126.03, -32.47], [126.25, -33.0], [126.03, -33.53], [125.5, -33.75], [125.25, -33.65], [125.0, -33.75], [124.75, -33.65], [124.5, -33.75], [124.25, -33.65], [124.0, -33.75], [123.75, -33.65], [123.5, -33.75], [123.25, -33.65], [123.0, -33.75], [122.75, -33.65], [122.5, -33.75], [122.25, -33.65], [122.0, -33.75], [121.47, -33.53], [121.32, -33.18], [121.25, -33.15], [121.0, -33.25], [120.47, -33.03], [120.32, -32.68], [120.25, -32.65], [120.0, -32.75], [119.75, -32.65], [119.5, -32.75]]]]}, "2025-05-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.5, -32.75], [118.97, -32.53], [118.75, -32.0], [118.97, -31.47], [119.5, -31.25], [119.75, -31.35], [120.0, -31.25], [120.25, -31.35], [120.5, -31.25], [120.75, -31.35], [121.0, -31.25], [121.25, -31.35], [121.5, -31.25], [121.75, -31.35], [122.0, -31.25], [122.5, -31.46], [123.0, -31.25], [123.53, -31.47], [123.68, -31.82], [124.03, -31.97], [124.18, -32.32], [124.25, -32.35], [124.5, -32.25], [124.75, -32.35], [125.0, -32.25], [125.25, -32.35], [125.5, -32.25], [126.03, -32.47], [126.25, -33.0], [126.03, -33.53], [125.5, -33.75], [125.25, -33.65], [125.0, -33.75], [124.75, -33.65], [124.5, -33.75], [124.25, -33.65], [124.0, -33.75], [123.75, -33.65], [123.5, -33.75], [123.25, -33.65], [123.0, -33.75], [122.75, -33.65], [122.5, -33.75], [122.25, -33.65], [122.0, -33.75], [121.47, -33.53], [121.32, -33.18], [121.25, -33.15], [121.0, -33.25], [120.47, -33.03], [120.32, -32.68], [120.25, -32.65], [120.0, -32.75], [119.75, -32.65], [119.5, -32.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.063382054553983}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.2276676580668027}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.150463842967213, 10.874350060357017, 10.916542186434299]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.571412658691429, 9.061388905843103, 8.84892298380538]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.866441851156072, -3.0146062281936565, -2.80195489485068]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.063382054553983, -3.8048521933341135, -3.5611101134113596]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7511019365259493, -1.3973841808288827, -1.3340510776830543]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.122814768888383, -1.6635159169259923, -1.5116196205440458]}}