{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:03.383884", "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": "2022-Sep-30_to_2022-Oct-04_121.0_-24.0"}, "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": 2022090001078}, "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 30 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 04 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 100875.20392478169}, "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": -24.0}, "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": 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": 120.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 125.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[121.0, -22.75], [121.25, -22.85], [121.5, -22.75], [121.75, -22.85], [122.0, -22.75], [122.53, -22.97], [122.68, -23.32], [122.75, -23.35], [123.0, -23.25], [123.53, -23.47], [123.75, -24.0], [123.65, -24.25], [123.68, -24.32], [123.75, -24.35], [124.0, -24.25], [124.53, -24.47], [124.68, -24.82], [125.03, -24.97], [125.18, -25.32], [125.53, -25.47], [125.75, -26.0], [125.65, -26.25], [125.75, -26.5], [125.53, -27.03], [125.0, -27.25], [124.75, -27.15], [124.5, -27.25], [124.25, -27.15], [124.0, -27.25], [123.47, -27.03], [123.32, -26.68], [123.25, -26.65], [123.0, -26.75], [122.47, -26.53], [122.32, -26.18], [122.25, -26.15], [122.0, -26.25], [121.47, -26.03], [121.32, -25.68], [120.97, -25.53], [120.82, -25.18], [120.75, -25.15], [120.5, -25.25], [120.25, -25.15], [120.0, -25.25], [119.47, -25.03], [119.25, -24.5], [119.47, -23.97], [119.82, -23.82], [119.97, -23.47], [120.32, -23.32], [120.47, -22.97], [121.0, -22.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.0, -25.75], [123.47, -25.53], [123.25, -25.0], [123.47, -24.47], [124.0, -24.25], [124.53, -24.47], [124.75, -25.0], [124.53, -25.53], [124.0, -25.75]]], [[[121.0, -22.75], [121.25, -22.85], [121.5, -22.75], [122.03, -22.97], [122.25, -23.5], [122.03, -24.03], [121.68, -24.18], [121.53, -24.53], [121.0, -24.75], [120.75, -24.65], [120.5, -24.75], [119.97, -24.53], [119.75, -24.0], [119.97, -23.47], [120.32, -23.32], [120.47, -22.97], [121.0, -22.75]]]]}, "2022-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.0, -25.75], [123.47, -25.53], [123.25, -25.0], [123.47, -24.47], [124.0, -24.25], [124.53, -24.47], [124.75, -25.0], [124.53, -25.53], [124.0, -25.75]]], [[[121.0, -22.75], [121.25, -22.85], [121.5, -22.75], [122.03, -22.97], [122.25, -23.5], [122.03, -24.03], [121.68, -24.18], [121.53, -24.53], [121.0, -24.75], [120.75, -24.65], [120.5, -24.75], [119.97, -24.53], [119.75, -24.0], [119.97, -23.47], [120.32, -23.32], [120.47, -22.97], [121.0, -22.75]]]]}, "2022-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[119.97, -23.47], [120.32, -23.32], [120.47, -22.97], [121.0, -22.75], [121.25, -22.85], [121.5, -22.75], [121.75, -22.85], [122.0, -22.75], [122.53, -22.97], [122.68, -23.32], [122.75, -23.35], [123.0, -23.25], [123.53, -23.47], [123.75, -24.0], [123.65, -24.25], [123.68, -24.32], [123.75, -24.35], [124.0, -24.25], [124.53, -24.47], [124.68, -24.82], [125.03, -24.97], [125.18, -25.32], [125.53, -25.47], [125.75, -26.0], [125.65, -26.25], [125.75, -26.5], [125.53, -27.03], [125.0, -27.25], [124.75, -27.15], [124.5, -27.25], [124.25, -27.15], [124.0, -27.25], [123.47, -27.03], [123.32, -26.68], [123.25, -26.65], [123.0, -26.75], [122.47, -26.53], [122.32, -26.18], [122.25, -26.15], [122.0, -26.25], [121.47, -26.03], [121.32, -25.68], [120.97, 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-26.03], [121.32, -25.68], [120.97, -25.53], [120.82, -25.18], [120.75, -25.15], [120.5, -25.25], [120.25, -25.15], [120.0, -25.25], [119.47, -25.03], [119.25, -24.5], [119.47, -23.97], [119.82, -23.82], [119.97, -23.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.799288578761661}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.72856832536381}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.30705884937811, 19.11913690463257, 17.319372795352763, 15.46694507853124, 17.044134837503236]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.79444814279219, 18.416104570098128, 15.372349165932917, 13.333359514292681, 15.589944650800419]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.337648879926246, -5.637123323249466, -7.080678720764813, -9.00069713259252, -7.587990851560761]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.849269666472139, -6.288513537776794, -8.054307843883919, -9.799288578761661, -8.963427094406939]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7814972075460485, -1.511406351480891, -1.699919080931121, -2.095748953005962, -1.7729180368342172]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9936943050473235, -1.5246242403698338, -1.9190595915381816, -2.3052263085776743, -2.1900707759425195]}}