{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:25:10.573142", "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-Apr-16_to_2021-Apr-19_141.0_-28.0"}, "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": 2021040000669}, "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 16 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 19 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": 76363.63156353311}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["C.Australia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Australia"]}, "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": -28.0}, "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": 141.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "141.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 137.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 141.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -26.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.47, -27.53], [139.25, -27.0], [139.47, -26.47], [140.0, -26.25], [140.53, -26.47], [140.7, -26.87], [141.0, -26.75], [141.53, -26.97], [141.68, -27.32], [142.03, -27.47], [142.25, -28.0], [142.03, -28.53], [141.5, -28.75], [141.25, -28.65], [141.0, -28.75], [140.47, -28.53], [140.25, -28.0], [140.35, -27.75], [140.3, -27.62], [140.0, -27.75], [139.47, -27.53]]]]}, "2021-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.35, -27.75], [137.25, -27.5], [137.35, -27.25], [137.25, -27.0], [137.47, -26.47], [138.0, -26.25], [138.5, -26.46], [139.0, -26.25], [139.25, -26.35], [139.5, -26.25], [139.75, -26.35], [140.0, -26.25], [140.53, -26.47], [140.7, -26.87], [141.0, -26.75], [141.53, -26.97], [141.68, -27.32], [142.03, -27.47], [142.25, -28.0], [142.03, -28.53], [141.68, -28.68], [141.65, -28.75], [141.75, -29.0], [141.53, -29.53], [141.0, -29.75], [140.75, -29.65], [140.5, -29.75], [140.25, -29.65], [140.0, -29.75], [139.5, -29.54], [139.0, -29.75], [138.75, -29.65], [138.5, -29.75], [137.97, -29.53], [137.82, -29.18], [137.47, -29.03], [137.25, -28.5], [137.35, -28.25], [137.25, -28.0], [137.35, -27.75]]]]}, "2021-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.35, -27.75], [137.25, -27.5], [137.35, -27.25], [137.25, -27.0], [137.47, -26.47], [138.0, -26.25], [138.5, -26.46], [139.0, -26.25], [139.25, -26.35], [139.5, -26.25], [139.75, -26.35], [140.0, -26.25], [140.53, -26.47], [140.7, -26.87], [141.0, -26.75], [141.53, -26.97], [141.68, -27.32], [142.03, -27.47], [142.25, -28.0], [142.03, -28.53], [141.68, -28.68], [141.65, -28.75], [141.75, -29.0], [141.53, -29.53], [141.0, -29.75], [140.75, -29.65], [140.5, -29.75], [140.25, -29.65], [140.0, -29.75], [139.5, -29.54], [139.0, -29.75], [138.75, -29.65], [138.5, -29.75], [137.97, -29.53], [137.82, -29.18], [137.47, -29.03], [137.25, -28.5], [137.35, -28.25], [137.25, -28.0], [137.35, -27.75]]]]}, "2021-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.35, -27.75], [137.25, -27.5], [137.35, -27.25], [137.25, -27.0], [137.47, -26.47], [138.0, -26.25], [138.5, -26.46], [139.0, -26.25], [139.25, -26.35], [139.5, -26.25], [140.03, -26.47], [140.25, -27.0], [140.15, -27.25], [140.18, -27.32], [140.25, -27.35], [140.5, -27.25], [140.75, -27.35], [141.0, -27.25], [141.53, -27.47], [141.75, -28.0], [141.65, -28.25], [141.75, -28.5], [141.65, -28.75], [141.75, -29.0], [141.53, -29.53], [141.0, -29.75], [140.75, -29.65], [140.5, -29.75], [140.25, -29.65], [140.0, -29.75], [139.5, -29.54], [139.0, -29.75], [138.75, -29.65], [138.5, -29.75], [137.97, -29.53], [137.82, -29.18], [137.47, -29.03], [137.25, -28.5], [137.35, -28.25], [137.25, -28.0], [137.35, -27.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.298851111187389}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.260744943990114}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.32023141209919, 17.637554620481353, 16.38514945133744, 16.792098371312363]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.037345456455853, 16.244516817438523, 15.027471357387356, 15.992341101838747]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.761805536105072, -4.778110032149373, -5.865930893166281, -5.203318087436044]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.0225801548986055, -5.288130170059674, -6.298851111187389, -5.76521962885522]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4588956058178135, -1.4659941834793273, -1.8125747743430287, -1.6333981170621206]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5218221153138904, -1.5766293587982825, -1.956835622953967, -1.868293020153409]}}