{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:23.760816", "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-Jan-21_to_2023-Jan-23_147.0_-31.0"}, "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": 2023010001014}, "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": "January 21 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 23 2023"}, "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": 53145.763013695774}, "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": -31.0}, "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": 147.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "147.0\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": 148.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -32.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -28.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[145.47, -27.97], [146.0, -27.75], [146.5, -27.96], [147.0, -27.75], [147.53, -27.97], [147.75, -28.5], [147.65, -28.75], [147.75, -29.0], [147.65, -29.25], [147.68, -29.32], [148.03, -29.47], [148.25, -30.0], [148.15, -30.25], [148.18, -30.32], [148.53, -30.47], [148.75, -31.0], [148.65, -31.25], [148.75, -31.5], [148.65, -31.75], [148.75, -32.0], [148.53, -32.53], [148.18, -32.68], [148.03, -33.03], [147.5, -33.25], [146.97, -33.03], [146.82, -32.68], [146.47, -32.53], [146.32, -32.18], [145.97, -32.03], [145.75, -31.5], [145.85, -31.25], [145.75, -31.0], [145.97, -30.47], [146.32, -30.32], [146.46, -30.0], [146.32, -29.68], [145.97, -29.53], [145.82, -29.18], [145.47, -29.03], [145.25, -28.5], [145.47, -27.97]]]]}}, "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": {"2023-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.47, -29.03], [145.25, -28.5], [145.47, -27.97], [146.0, -27.75], [146.5, -27.96], [147.0, -27.75], [147.53, -27.97], [147.75, -28.5], [147.65, -28.75], [147.75, -29.0], [147.65, -29.25], [147.68, -29.32], [148.03, -29.47], [148.25, -30.0], [148.15, -30.25], [148.18, -30.32], [148.53, -30.47], [148.75, -31.0], [148.65, -31.25], [148.75, -31.5], [148.65, -31.75], [148.75, -32.0], [148.53, -32.53], [148.18, -32.68], [148.03, -33.03], [147.5, -33.25], [146.97, -33.03], [146.82, -32.68], [146.47, -32.53], [146.32, -32.18], [145.97, -32.03], [145.75, -31.5], [145.85, -31.25], [145.75, -31.0], [145.97, -30.47], [146.32, -30.32], [146.46, -30.0], [146.32, -29.68], [145.97, -29.53], [145.82, -29.18], [145.47, -29.03]]]]}, "2023-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.47, -29.03], [145.25, -28.5], [145.47, -27.97], [146.0, -27.75], [146.5, -27.96], [147.0, -27.75], [147.53, -27.97], [147.75, -28.5], [147.65, -28.75], [147.75, -29.0], [147.65, -29.25], [147.68, -29.32], [148.03, -29.47], [148.25, -30.0], [148.15, -30.25], [148.18, -30.32], [148.53, -30.47], [148.75, -31.0], [148.65, -31.25], [148.75, -31.5], [148.65, -31.75], [148.75, -32.0], [148.53, -32.53], [148.18, -32.68], [148.03, -33.03], [147.5, -33.25], [146.97, -33.03], [146.82, -32.68], [146.47, -32.53], [146.32, -32.18], [145.97, -32.03], [145.75, -31.5], [145.85, -31.25], [145.75, -31.0], [145.97, -30.47], [146.32, -30.32], [146.46, -30.0], [146.32, -29.68], [145.97, -29.53], [145.82, -29.18], [145.47, -29.03]]]]}, "2023-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.47, -29.03], [145.25, -28.5], [145.47, -27.97], [146.0, -27.75], [146.5, -27.96], [147.0, -27.75], [147.53, -27.97], [147.75, -28.5], [147.65, -28.75], [147.75, -29.0], [147.65, -29.25], [147.68, -29.32], [148.03, -29.47], [148.25, -30.0], [148.15, -30.25], [148.18, -30.32], [148.53, -30.47], [148.75, -31.0], [148.65, -31.25], [148.75, -31.5], [148.65, -31.75], [148.75, -32.0], [148.53, -32.53], [148.18, -32.68], [148.03, -33.03], [147.5, -33.25], [146.97, -33.03], [146.82, -32.68], [146.47, -32.53], [146.32, -32.18], [145.97, -32.03], [145.75, -31.5], [145.85, -31.25], [145.75, -31.0], [145.97, -30.47], [146.32, -30.32], [146.46, -30.0], [146.32, -29.68], [145.97, -29.53], [145.82, -29.18], [145.47, -29.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.011998053322145}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.595458591918125}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.26096228612346, 21.2753758309467, 23.57856832291253]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.04873463835571, 18.97077503649564, 22.174088373015877]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.398675151341598, -7.366337672019628, -5.021362952393147]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.011998053322145, -8.303350712467363, -5.7105189141524875]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1268583693554355, -2.159824767843978, -1.464573276887021]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.582478273426409, -2.520979196686296, -1.609166744902143]}}