{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:21.998119", "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-Dec-27_to_2021-Dec-30_152.0_-28.5"}, "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": 2021120001015}, "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": "December 27 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 30 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": 79483.82124810036}, "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": -28.5}, "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": 152.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "152.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 150.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 152.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -33.5}, "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": [[[[149.35, -31.75], [149.25, -31.5], [149.47, -30.97], [150.0, -30.75], [150.53, -30.97], [150.68, -31.32], [150.75, -31.35], [150.82, -31.32], [150.96, -31.0], [150.75, -30.5], [150.85, -30.25], [150.75, -30.0], [150.85, -29.75], [150.75, -29.5], [150.85, -29.25], [150.75, -29.0], [150.85, -28.75], [150.75, -28.5], [150.97, -27.97], [151.5, -27.75], [151.75, -27.85], [152.0, -27.75], [152.25, -27.85], [152.5, -27.75], [153.03, -27.97], [153.25, -28.5], [153.15, -28.75], [153.25, -29.0], [153.15, -29.25], [153.25, -29.5], [153.15, -29.75], [153.25, -30.0], [153.03, -30.53], [152.68, -30.68], [152.65, -30.75], [152.75, -31.0], [152.65, -31.25], [152.75, -31.5], [152.53, -32.03], [152.18, -32.18], [152.03, -32.53], [151.68, -32.68], [151.65, -32.75], [151.75, -33.0], [151.65, -33.25], [151.75, -33.5], [151.53, -34.03], [151.0, -34.25], [150.75, -34.15], [150.5, -34.25], [149.97, -34.03], [149.82, -33.68], [149.47, -33.53], [149.25, -33.0], [149.35, -32.75], [149.25, -32.5], [149.35, -32.25], [149.25, -32.0], [149.35, -31.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[149.25, -32.5], [149.35, -32.25], [149.25, -32.0], [149.35, -31.75], [149.25, -31.5], [149.47, -30.97], [150.0, -30.75], [150.53, -30.97], [150.68, -31.32], [150.75, -31.35], [150.82, -31.32], [150.96, -31.0], [150.75, -30.5], [150.97, -29.97], [151.5, -29.75], [151.75, -29.85], [152.0, -29.75], [152.53, -29.97], [152.75, -30.5], [152.65, -30.75], [152.75, -31.0], [152.65, -31.25], [152.75, -31.5], [152.53, -32.03], [152.18, -32.18], [152.03, -32.53], [151.68, -32.68], [151.65, -32.75], [151.75, -33.0], [151.65, -33.25], [151.75, -33.5], [151.53, -34.03], [151.0, -34.25], [150.75, -34.15], [150.5, -34.25], [149.97, -34.03], [149.82, -33.68], [149.47, -33.53], [149.25, -33.0], [149.35, -32.75], [149.25, -32.5]]]]}, "2021-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[149.25, -32.5], [149.35, -32.25], [149.25, -32.0], [149.35, -31.75], [149.25, -31.5], [149.47, -30.97], [150.0, -30.75], [150.53, -30.97], [150.68, -31.32], [150.75, -31.35], [150.82, -31.32], [150.96, -31.0], [150.75, -30.5], [150.85, -30.25], [150.75, -30.0], [150.85, -29.75], [150.75, -29.5], [150.85, -29.25], [150.75, -29.0], [150.85, -28.75], [150.75, -28.5], [150.97, -27.97], [151.5, -27.75], [151.75, -27.85], [152.0, -27.75], [152.25, -27.85], [152.5, -27.75], [153.03, -27.97], [153.25, -28.5], [153.15, -28.75], [153.25, -29.0], [153.15, -29.25], [153.25, -29.5], [153.15, -29.75], [153.25, -30.0], [153.03, -30.53], [152.68, -30.68], [152.65, -30.75], [152.75, -31.0], [152.65, -31.25], [152.75, -31.5], [152.53, -32.03], [152.18, -32.18], [152.03, -32.53], [151.68, -32.68], [151.65, -32.75], [151.75, -33.0], [151.65, -33.25], [151.75, -33.5], [151.53, -34.03], [151.0, -34.25], [150.75, -34.15], [150.5, -34.25], [149.97, -34.03], [149.82, -33.68], [149.47, -33.53], [149.25, -33.0], [149.35, -32.75], [149.25, -32.5]]]]}, "2021-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[149.25, -32.5], [149.35, -32.25], [149.25, -32.0], [149.35, -31.75], [149.25, -31.5], [149.47, -30.97], [150.0, -30.75], [150.53, -30.97], [150.68, -31.32], [150.75, -31.35], [150.82, -31.32], [150.96, -31.0], [150.75, -30.5], [150.85, -30.25], [150.75, -30.0], [150.85, -29.75], [150.75, -29.5], [150.85, -29.25], [150.75, -29.0], [150.85, -28.75], [150.75, -28.5], [150.97, -27.97], [151.5, -27.75], [151.75, -27.85], [152.0, -27.75], [152.25, -27.85], [152.5, -27.75], [153.03, -27.97], [153.25, -28.5], [153.15, -28.75], [153.25, -29.0], [153.15, -29.25], [153.25, -29.5], [153.15, -29.75], [153.25, -30.0], [153.03, -30.53], [152.68, -30.68], [152.65, -30.75], [152.75, -31.0], [152.65, -31.25], [152.75, -31.5], [152.53, -32.03], [152.18, -32.18], [152.03, -32.53], [151.68, -32.68], [151.65, -32.75], [151.75, -33.0], [151.65, -33.25], [151.75, -33.5], [151.53, -34.03], [151.0, -34.25], [150.75, -34.15], [150.5, -34.25], [149.97, -34.03], [149.82, -33.68], [149.47, -33.53], [149.25, -33.0], [149.35, -32.75], [149.25, -32.5]]]]}, "2021-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[150.75, -29.5], [150.85, -29.25], [150.75, -29.0], [150.85, -28.75], [150.75, -28.5], [150.97, -27.97], [151.5, -27.75], [151.75, -27.85], [152.0, -27.75], [152.25, -27.85], [152.5, -27.75], [153.03, -27.97], [153.25, -28.5], [153.15, -28.75], [153.25, -29.0], [153.15, -29.25], [153.25, -29.5], [153.15, -29.75], [153.25, -30.0], [153.03, -30.53], [152.5, -30.75], [152.25, -30.65], [152.0, -30.75], [151.75, -30.65], [151.5, -30.75], [150.97, -30.53], [150.75, -30.0], [150.85, -29.75], [150.75, -29.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.6232999772825}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.651337230023397}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.031146713752946, 14.92778286705385, 16.283452233136074, 17.330153481474838]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.490735192573197, 11.62637323929772, 13.039185782825882, 14.67041814693863]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.423793000446185, -5.63915295094766, -4.308796860296305, -3.379465196396282]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.775272552783008, -6.6232999772825, -5.188746303502285, -3.7735766170235365]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.415053988377944, -1.9795090428151532, -1.4773281092872035, -1.3519636794567507]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7729071427743262, -2.465908078625262, -1.712797587124586, -1.4815190365491615]}}