{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:12.895627", "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": "2023-Sep-12_to_2023-Sep-14_159.0_-20.5"}, "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": 2023090000294}, "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": "September 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 14 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 63702.11406955937}, "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": ["New Caledonia"]}, "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": ["Coral Sea", "Lansdowne"]}, "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": -20.5}, "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": 159.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "159.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 157.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 161.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -21.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[156.97, -18.97], [157.5, -18.75], [157.75, -18.85], [158.0, -18.75], [158.25, -18.85], [158.5, -18.75], [158.75, -18.85], [159.0, -18.75], [159.53, -18.97], [159.68, -19.32], [159.75, -19.35], [160.0, -19.25], [160.53, -19.47], [160.68, -19.82], [161.03, -19.97], [161.18, -20.32], [161.53, -20.47], [161.68, -20.82], [162.03, -20.97], [162.25, -21.5], [162.03, -22.03], [161.5, -22.25], [161.25, -22.15], [161.0, -22.25], [160.75, -22.15], [160.5, -22.25], [160.25, -22.15], [160.0, -22.25], [159.47, -22.03], [159.32, -21.68], [158.97, -21.53], [158.82, -21.18], [158.75, -21.15], [158.5, -21.25], [157.97, -21.03], [157.82, -20.68], [157.47, -20.53], [157.32, -20.18], [156.97, -20.03], [156.75, -19.5], [156.97, -18.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.97, -20.03], [156.75, -19.5], [156.97, -18.97], [157.5, -18.75], [157.75, -18.85], [158.0, -18.75], [158.25, -18.85], [158.5, -18.75], [158.75, -18.85], [159.0, -18.75], [159.53, -18.97], [159.68, -19.32], [159.75, -19.35], [160.0, -19.25], [160.53, -19.47], [160.68, -19.82], [161.03, -19.97], [161.18, -20.32], [161.53, -20.47], [161.68, -20.82], [162.03, -20.97], [162.25, -21.5], [162.03, -22.03], [161.5, -22.25], [161.25, -22.15], [161.0, -22.25], [160.75, -22.15], [160.5, -22.25], [160.25, -22.15], [160.0, -22.25], [159.47, -22.03], [159.32, -21.68], [158.97, -21.53], [158.82, -21.18], [158.75, -21.15], [158.5, -21.25], [157.97, -21.03], [157.82, -20.68], [157.47, -20.53], [157.32, -20.18], [156.97, -20.03]]]]}, "2023-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.97, -20.03], [156.75, -19.5], [156.97, -18.97], [157.5, -18.75], [157.75, -18.85], [158.0, -18.75], [158.25, -18.85], [158.5, -18.75], [158.75, -18.85], [159.0, -18.75], [159.53, -18.97], [159.68, -19.32], [159.75, -19.35], [160.0, -19.25], [160.53, -19.47], [160.68, -19.82], [161.03, -19.97], [161.18, -20.32], [161.53, -20.47], [161.68, -20.82], [162.03, -20.97], [162.25, -21.5], [162.03, -22.03], [161.5, -22.25], [161.25, -22.15], [161.0, -22.25], [160.75, -22.15], [160.5, -22.25], [160.25, -22.15], [160.0, -22.25], [159.47, -22.03], [159.32, -21.68], [158.97, -21.53], [158.82, -21.18], [158.75, -21.15], [158.5, -21.25], [157.97, -21.03], [157.82, -20.68], [157.47, -20.53], [157.32, -20.18], [156.97, -20.03]]]]}, "2023-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.97, -20.03], [156.75, -19.5], [156.97, -18.97], [157.5, -18.75], [157.75, -18.85], [158.0, -18.75], [158.25, -18.85], [158.5, -18.75], [158.75, -18.85], [159.0, -18.75], [159.53, -18.97], [159.68, -19.32], [159.75, -19.35], [160.0, -19.25], [160.53, -19.47], [160.68, -19.82], [161.03, -19.97], [161.18, -20.32], [161.53, -20.47], [161.68, -20.82], [162.03, -20.97], [162.25, -21.5], [162.03, -22.03], [161.5, -22.25], [161.25, -22.15], [161.0, -22.25], [160.75, -22.15], [160.5, -22.25], [160.25, -22.15], [160.0, -22.25], [159.47, -22.03], [159.32, -21.68], [158.97, -21.53], [158.82, -21.18], [158.75, -21.15], [158.5, -21.25], [157.97, -21.03], [157.82, -20.68], [157.47, -20.53], [157.32, -20.18], [156.97, -20.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -1.820065184654652}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.3424569927551326}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.63693391757647, 20.438612290654646, 20.400133646589325]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.90672819467352, 19.65614475167797, 19.962413404228016]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.1688204016707753, -1.3862538806739337, -1.4722966959206887]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.4004954691703801, -1.6722840503179555, -1.820065184654652]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4301382461539798, -1.7009539200681447, -1.8129133010854444]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7582842285558404, -2.0216162652246856, -2.2620556941742027]}}