{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:14:23.415203", "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": "2021-Oct-30_to_2021-Nov-02_124.5_-21.5"}, "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": 2021100000994}, "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": "October 30 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 02 2021"}, "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": 80100.1424048454}, "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": -21.5}, "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": 124.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "124.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 122.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 127.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -23.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[122.75, -20.35], [123.0, -20.25], [123.53, -20.47], [123.7, -20.87], [124.0, -20.75], [124.25, -20.85], [124.5, -20.75], [124.75, -20.85], [125.0, -20.75], [125.53, -20.97], [125.68, -21.32], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.53, -24.03], [127.0, -24.25], [126.75, -24.15], [126.5, -24.25], [125.97, -24.03], [125.82, -23.68], [125.75, -23.65], [125.5, -23.75], [125.25, -23.65], [125.0, -23.75], [124.47, -23.53], [124.32, -23.18], [124.25, -23.15], [124.0, -23.25], [123.47, -23.03], [123.32, -22.68], [122.97, -22.53], [122.82, -22.18], [122.75, -22.15], [122.5, -22.25], [121.97, -22.03], [121.75, -21.5], [121.85, -21.25], [121.75, -21.0], [121.97, -20.47], [122.5, -20.25], [122.75, -20.35]]]]}}, "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": {"2021-10-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.75, -21.0], [121.97, -20.47], [122.5, -20.25], [122.75, -20.35], [123.0, -20.25], [123.53, -20.47], [123.7, -20.87], [124.0, -20.75], [124.25, -20.85], [124.5, -20.75], [124.75, -20.85], [125.0, -20.75], [125.53, -20.97], [125.68, -21.32], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.53, -24.03], [127.0, -24.25], [126.75, -24.15], [126.5, -24.25], [125.97, -24.03], [125.82, -23.68], [125.75, -23.65], [125.5, -23.75], [125.25, -23.65], [125.0, -23.75], [124.47, -23.53], [124.32, -23.18], [124.25, -23.15], [124.0, -23.25], [123.47, -23.03], [123.32, -22.68], [122.97, -22.53], [122.82, -22.18], [122.75, -22.15], [122.5, -22.25], [121.97, -22.03], [121.75, -21.5], [121.85, -21.25], [121.75, -21.0]]]]}, "2021-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.75, -21.0], [121.97, -20.47], [122.5, -20.25], [122.75, -20.35], [123.0, -20.25], [123.53, -20.47], [123.7, -20.87], [124.0, -20.75], [124.25, -20.85], [124.5, -20.75], [124.75, -20.85], [125.0, -20.75], [125.53, -20.97], [125.68, -21.32], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.53, -24.03], [127.0, -24.25], [126.75, -24.15], [126.5, -24.25], [125.97, -24.03], [125.82, -23.68], [125.75, -23.65], [125.5, -23.75], [125.25, -23.65], [125.0, -23.75], [124.47, -23.53], [124.32, -23.18], [124.25, -23.15], [124.0, -23.25], [123.47, -23.03], [123.32, -22.68], [122.97, -22.53], [122.82, -22.18], [122.75, -22.15], [122.5, -22.25], [121.97, -22.03], [121.75, -21.5], [121.85, -21.25], [121.75, -21.0]]]]}, "2021-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.75, -21.0], [121.97, -20.47], [122.5, -20.25], [122.75, -20.35], [123.0, -20.25], [123.53, -20.47], [123.7, -20.87], [124.0, -20.75], [124.25, -20.85], [124.5, -20.75], [124.75, -20.85], [125.0, -20.75], [125.53, -20.97], [125.68, -21.32], [125.75, -21.35], [126.0, -21.25], [126.25, -21.35], [126.5, -21.25], [127.03, -21.47], [127.18, -21.82], [127.53, -21.97], [127.75, -22.5], [127.65, -22.75], [127.75, -23.0], [127.65, -23.25], [127.75, -23.5], [127.53, -24.03], [127.0, -24.25], [126.75, -24.15], [126.5, -24.25], [125.97, -24.03], [125.82, -23.68], [125.75, -23.65], [125.5, -23.75], [125.25, -23.65], [125.0, -23.75], [124.47, -23.53], [124.32, -23.18], [124.25, -23.15], [124.0, -23.25], [123.47, -23.03], [123.32, -22.68], [122.97, -22.53], [122.82, -22.18], [122.75, -22.15], [122.5, -22.25], [121.97, -22.03], [121.75, -21.5], [121.85, -21.25], [121.75, -21.0]]]]}, "2021-11-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.97, -20.97], [124.5, -20.75], [125.03, -20.97], [125.25, -21.5], [125.03, -22.03], [124.5, -22.25], [123.97, -22.03], [123.75, -21.5], [123.97, -20.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.859228138800006}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.63665806903123}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.829093829338206, 25.253133514549063, 26.005906815420758, 27.550224666104498]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.604137774439153, 23.00416456244494, 24.191618381166677, 27.550224666104498]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.923864800124415, -5.411563538012909, -4.675594133492696, -3.807306662014014]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.859228138800006, -6.572942669720248, -5.660033304082901, -3.807306662014014]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-3.6357092069270194, -1.9339743845846293, -1.6624530826460533, -1.552497238015253]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-4.062231980935401, -2.2626805519938133, -1.893238101616655, -1.552497238015253]}}