{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:19:25.061925", "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-Apr-17_to_2022-Apr-20_117.5_-25.5"}, "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": 2022040000566}, "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 17 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 20 2022"}, "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": 156721.5367340967}, "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": -25.5}, "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": 117.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 115.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 122.5}, "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": -24.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[115.75, -24.35], [115.82, -24.32], [115.97, -23.97], [116.32, -23.82], [116.47, -23.47], [117.0, -23.25], [117.25, -23.35], [117.5, -23.25], [117.75, -23.35], [118.0, -23.25], [118.25, -23.35], [118.5, -23.25], [118.75, -23.35], [119.0, -23.25], [119.25, -23.35], [119.5, -23.25], [119.75, -23.35], [120.0, -23.25], [120.25, -23.35], [120.5, -23.25], [121.03, -23.47], [121.18, -23.82], [121.53, -23.97], [121.68, -24.32], [122.03, -24.47], [122.18, -24.82], [122.25, -24.85], [122.5, -24.75], [123.03, -24.97], [123.25, -25.5], [123.03, -26.03], [122.5, -26.25], [122.25, -26.15], [122.0, -26.25], [121.75, -26.15], [121.5, -26.25], [121.25, -26.15], [121.0, -26.25], [120.75, -26.15], [120.5, -26.25], [120.25, -26.15], [120.0, -26.25], [119.75, -26.15], [119.5, -26.25], [119.25, -26.15], [119.18, -26.18], [119.03, -26.53], [118.5, -26.75], [118.25, -26.65], [118.0, -26.75], [117.75, -26.65], [117.68, -26.68], [117.53, -27.03], [117.0, -27.25], [116.75, -27.15], [116.5, -27.25], [116.25, -27.15], [116.0, -27.25], [115.75, -27.15], [115.5, -27.25], [114.97, -27.03], [114.75, -26.5], [114.96, -26.0], [114.75, -25.5], [114.85, -25.25], [114.75, -25.0], [114.97, -24.47], [115.5, -24.25], [115.75, -24.35]]]]}}, "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": {"2022-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.75, -25.0], [114.97, -24.47], [115.5, -24.25], [115.75, -24.35], [116.0, -24.25], [116.25, -24.35], [116.5, -24.25], [116.75, -24.35], [117.0, -24.25], [117.53, -24.47], [117.68, -24.82], [117.75, -24.85], [118.0, -24.75], [118.53, -24.97], [118.68, -25.32], [119.03, -25.47], [119.25, -26.0], [119.03, -26.53], [118.5, -26.75], [118.25, -26.65], [118.0, -26.75], [117.75, -26.65], [117.68, -26.68], [117.53, -27.03], [117.0, -27.25], [116.75, -27.15], [116.5, -27.25], [116.25, -27.15], [116.0, -27.25], [115.75, -27.15], [115.5, -27.25], [114.97, -27.03], [114.75, -26.5], [114.96, -26.0], [114.75, -25.5], [114.85, -25.25], [114.75, -25.0]]]]}, "2022-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.75, -25.0], [114.97, -24.47], [115.5, -24.25], [115.75, -24.35], [115.82, -24.32], [115.97, -23.97], [116.32, -23.82], [116.47, -23.47], [117.0, -23.25], [117.25, -23.35], [117.5, -23.25], [117.75, -23.35], [118.0, -23.25], [118.25, -23.35], [118.5, -23.25], [118.75, -23.35], [119.0, -23.25], [119.25, -23.35], [119.5, -23.25], [119.75, -23.35], [120.0, -23.25], [120.25, -23.35], [120.5, -23.25], [121.03, -23.47], [121.18, -23.82], [121.53, -23.97], [121.68, -24.32], [122.03, -24.47], [122.18, -24.82], [122.25, -24.85], [122.5, -24.75], [123.03, -24.97], [123.25, -25.5], [123.03, -26.03], [122.5, -26.25], [122.25, -26.15], [122.0, -26.25], [121.75, -26.15], [121.5, -26.25], [121.25, -26.15], [121.0, -26.25], [120.75, -26.15], [120.5, -26.25], [120.25, -26.15], [120.0, -26.25], [119.75, -26.15], [119.5, 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anomaly recorded over entire duration", "value": -7.246131985483316}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.188456209557183}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.810553960270568, 20.03921491300389, 19.179117909194645, 20.195833524041348]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.168528059093433, 18.28731859658177, 17.31658187987756, 18.814645650890213]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.6341899466874565, -5.12903831903425, -5.854151410368871, -4.740099266051779]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.528897233185262, -6.577212579570357, -7.246131985483316, -6.088737368088232]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6689481989542418, -1.8723629930276005, -2.069824622809547, -1.6355363017924747]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8754570327199074, -2.5271861541460354, -2.583933658722286, -2.187042775772098]}}