{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:18:43.076881", "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": "2018-Dec-28_to_2019-Jan-02_143.5_-14.5"}, "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": 2018120000915}, "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 28 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 02 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 77795.57757153129}, "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": ["N.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": -14.5}, "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": 143.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "143.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 141.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 145.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -12.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.0, -12.25], [143.53, -12.47], [143.75, -13.0], [143.53, -13.53], [143.0, -13.75], [142.47, -13.53], [142.25, -13.0], [142.47, -12.47], [143.0, -12.25]]]]}, "2018-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.46, -13.5], [142.25, -13.0], [142.47, -12.47], [143.0, -12.25], [143.53, -12.47], [143.75, -13.0], [143.54, -13.5], [143.68, -13.82], [143.75, -13.85], [144.0, -13.75], [144.25, -13.85], [144.5, -13.75], [145.03, -13.97], [145.18, -14.32], [145.53, -14.47], [145.75, -15.0], [145.65, -15.25], [145.75, -15.5], [145.65, -15.75], [145.75, -16.0], [145.65, -16.25], [145.75, -16.5], [145.53, -17.03], [145.0, -17.25], [144.75, -17.15], [144.5, -17.25], [143.97, -17.03], [143.75, -16.5], [143.97, -15.97], [144.32, -15.82], [144.35, -15.75], [144.32, -15.68], [144.25, -15.65], [144.0, -15.75], [143.75, -15.65], [143.5, -15.75], [142.97, -15.53], [142.82, -15.18], [142.47, -15.03], [142.25, -14.5], [142.35, -14.25], [142.25, -14.0], [142.46, -13.5]]]]}, "2018-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.35, -14.25], [141.25, -14.0], [141.47, -13.47], [141.82, -13.32], [141.85, -13.25], [141.75, -13.0], [141.85, -12.75], [141.75, -12.5], [141.97, -11.97], [142.5, -11.75], [142.75, -11.85], [143.0, -11.75], [143.53, -11.97], [143.75, -12.5], [143.65, -12.75], [143.75, -13.0], [143.54, -13.5], [143.68, -13.82], [143.75, -13.85], [144.0, -13.75], [144.25, -13.85], [144.5, -13.75], [145.03, -13.97], [145.18, -14.32], [145.53, -14.47], [145.75, -15.0], [145.65, -15.25], [145.75, -15.5], [145.65, -15.75], [145.75, -16.0], [145.65, -16.25], [145.75, -16.5], [145.53, -17.03], [145.0, -17.25], [144.75, -17.15], [144.5, -17.25], [143.97, -17.03], [143.75, -16.5], [143.97, -15.97], [144.32, -15.82], [144.35, -15.75], [144.32, -15.68], [144.25, -15.65], [144.0, -15.75], [143.75, -15.65], [143.5, -15.75], [143.25, -15.65], [143.0, -15.75], [142.75, -15.65], [142.5, -15.75], [142.25, -15.65], [142.0, -15.75], [141.47, -15.53], [141.25, -15.0], [141.35, -14.75], [141.25, -14.5], [141.35, -14.25]]]]}, "2018-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[141.35, -14.25], [141.25, -14.0], [141.47, -13.47], [141.82, -13.32], [141.85, -13.25], [141.75, -13.0], [141.85, -12.75], [141.75, -12.5], [141.97, -11.97], [142.5, -11.75], [142.75, -11.85], [143.0, -11.75], [143.53, -11.97], [143.75, -12.5], [143.65, -12.75], [143.75, -13.0], [143.63, -13.3], [144.03, -13.47], [144.18, -13.82], [144.25, -13.85], [144.5, -13.75], [145.03, -13.97], [145.18, -14.32], [145.53, -14.47], [145.75, -15.0], [145.65, -15.25], [145.75, -15.5], [145.65, -15.75], [145.75, -16.0], [145.65, -16.25], [145.75, -16.5], [145.53, -17.03], [145.0, -17.25], [144.75, -17.15], [144.5, -17.25], [143.97, -17.03], [143.75, -16.5], [143.97, -15.97], [144.32, -15.82], [144.35, -15.75], [144.32, -15.68], [144.25, -15.65], [144.0, -15.75], [143.75, -15.65], [143.5, -15.75], [143.25, -15.65], [143.0, -15.75], [142.75, -15.65], [142.5, -15.75], [142.25, -15.65], [142.0, 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"MultiPolygon", "coordinates": [[[[141.85, -13.75], [141.75, -13.5], [141.85, -13.25], [141.75, -13.0], [141.85, -12.75], [141.75, -12.5], [141.97, -11.97], [142.5, -11.75], [142.75, -11.85], [143.0, -11.75], [143.53, -11.97], [143.75, -12.5], [143.65, -12.75], [143.75, -13.0], [143.63, -13.3], [144.03, -13.47], [144.18, -13.82], [144.25, -13.85], [144.5, -13.75], [145.03, -13.97], [145.18, -14.32], [145.53, -14.47], [145.75, -15.0], [145.53, -15.53], [145.0, -15.75], [144.75, -15.65], [144.5, -15.75], [144.25, -15.65], [144.0, -15.75], [143.75, -15.65], [143.5, -15.75], [142.97, -15.53], [142.82, -15.18], [142.75, -15.15], [142.5, -15.25], [141.97, -15.03], [141.75, -14.5], [141.85, -14.25], [141.75, -14.0], [141.85, -13.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.32973134605777}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.272834033701406}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.689784538049423, 25.39611824112393, 25.447477742029378, 25.21709461493208, 24.873830328936663, 24.885974173616262]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.689784538049423, 23.434218162220134, 23.412725067196902, 23.055351025426035, 23.28380779316052, 23.250629895700683]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.1029569138530064, -1.7846788924483892, -1.9880879173374524, -2.1508634806420663, -2.78059147623322, -2.6330265425444885]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.1029569138530064, -2.3790735846602615, -2.63287386258105, -3.126474764250929, -4.32973134605777, -3.582057007147455]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.838350536352753, -1.5257611404018248, -1.5333444252833308, -1.6813750026809695, -2.2071416641457553, -2.2720863847868698]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.838350536352753, -1.9271393616590407, -1.865999892448909, -2.2744879740844155, -3.147576568678501, -3.127244270259886]}}