{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:06.326567", "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-07_to_2021-Dec-10_139.0_-35.0"}, "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": 2021120000289}, "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 07 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 10 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": 79835.05986491118}, "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": -35.0}, "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": 139.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "139.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 135.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -35.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[139.03, -36.03], [138.5, -36.25], [137.97, -36.03], [137.82, -35.68], [137.47, -35.53], [137.25, -35.0], [137.35, 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[138.68, -34.32], [138.75, -34.35], [138.82, -34.32], [138.85, -34.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Australia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[134.97, -33.03], [134.75, -32.5], [134.97, -31.97], [135.32, -31.82], [135.47, -31.47], [136.0, -31.25], [136.53, -31.47], [136.75, -32.0], [136.97, -31.47], [137.5, -31.25], [137.75, -31.35], [138.0, -31.25], [138.53, -31.47], [138.75, -32.0], [138.65, -32.25], [138.75, -32.5], [138.65, -32.75], [138.7, -32.87], [139.0, -32.75], [139.53, -32.97], [139.68, -33.32], [139.75, -33.35], [140.0, -33.25], [140.53, -33.47], [140.75, -34.0], [140.53, -34.53], [140.18, -34.68], [140.15, -34.75], [140.25, -35.0], [140.03, -35.53], [139.5, -35.75], [139.25, -35.65], [139.18, -35.68], [139.03, 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[[138.65, -34.25], [138.68, -34.32], [138.75, -34.35], [138.82, -34.32], [138.85, -34.25], [138.82, -34.18], [138.7, -34.12], [138.65, -34.25]]]]}, "2021-12-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.47, -34.47], [139.0, -34.25], [139.53, -34.47], [139.75, -35.0], [139.53, -35.53], [139.0, -35.75], [138.47, -35.53], [138.25, -35.0], [138.47, -34.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.764562089919195}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.016219928183959}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.54756700180053, 15.069725894116573, 15.649318637154522, 13.087970932743247]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.23824563134633, 11.631838795512522, 12.25012140781297, 13.087970932743247]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.821625505423688, -5.400231939745395, -4.837611981439116, -4.681121024437971]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.690512582282224, -6.764562089919195, -6.040950098094299, -4.681121024437971]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.220241294461972, -1.3268821533686803, -1.2302466206067606, -1.0491349616464831]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3570564315304892, -1.5760677822113485, -1.488603395002631, -1.0491349616464831]}}