{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:10:07.580264", "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": "2026-Feb-02_to_2026-Feb-06_160.5_-32.5"}, "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": 2026020000080}, "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": "February 02 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 06 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 128412.58825198268}, "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": ["Pacific Ocean", "Tasman Sea"]}, "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": -32.5}, "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": 160.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "160.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 157.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 161.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.75}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[161.68, -31.82], [162.03, -31.97], [162.25, -32.5], [162.15, -32.75], [162.25, -33.0], [162.03, -33.53], [161.68, -33.68], [161.65, -33.75], [161.75, -34.0], [161.53, -34.53], [161.0, -34.75], [160.47, -34.53], [160.32, -34.18], [160.25, -34.15], [160.0, -34.25], [159.75, -34.15], [159.5, -34.25], [158.97, -34.03], [158.82, -33.68], [158.75, -33.65], [158.68, -33.68], [158.53, -34.03], [158.0, -34.25], [157.47, -34.03], [157.25, -33.5], [157.35, -33.25], [157.25, -33.0], [157.35, -32.75], [157.25, -32.5], [157.35, -32.25], [157.25, -32.0], [157.35, -31.75], [157.32, -31.68], [156.97, -31.53], [156.75, -31.0], [156.85, -30.75], [156.75, -30.5], [156.97, -29.97], [157.32, -29.82], [157.47, -29.47], [158.0, -29.25], [158.25, -29.35], [158.5, -29.25], [159.03, -29.47], [159.18, -29.82], [159.25, -29.85], [159.5, -29.75], [160.03, -29.97], [160.18, -30.32], [160.53, -30.47], [160.68, -30.82], [160.75, -30.85], [161.0, -30.75], [161.53, -30.97], [161.75, -31.5], [161.65, -31.75], [161.68, -31.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand", "S.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-02-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[156.75, -30.5], [156.97, -29.97], [157.32, -29.82], [157.47, -29.47], [158.0, -29.25], [158.25, -29.35], [158.5, -29.25], [159.03, -29.47], [159.18, -29.82], [159.25, -29.85], [159.5, -29.75], [160.03, -29.97], [160.18, -30.32], [160.53, -30.47], [160.68, -30.82], [160.75, -30.85], [161.0, -30.75], [161.53, -30.97], [161.75, -31.5], [161.65, -31.75], [161.68, -31.82], [162.03, -31.97], [162.25, -32.5], [162.15, -32.75], [162.25, -33.0], [162.03, -33.53], [161.68, -33.68], [161.65, -33.75], [161.75, -34.0], [161.53, -34.53], [161.0, -34.75], [160.47, -34.53], [160.32, -34.18], [160.25, -34.15], [160.0, -34.25], [159.75, -34.15], [159.5, -34.25], [158.97, -34.03], [158.82, -33.68], [158.75, -33.65], [158.68, -33.68], [158.53, -34.03], [158.0, 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-33.03], [158.25, -32.5], [158.35, -32.25], [158.25, -32.0]]]]}, "2026-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[159.25, -32.5], [159.47, -31.97], [160.0, -31.75], [160.25, -31.85], [160.5, -31.75], [161.03, -31.97], [161.25, -32.5], [161.15, -32.75], [161.25, -33.0], [161.03, -33.53], [160.5, -33.75], [160.25, -33.65], [160.0, -33.75], [159.47, -33.53], [159.25, -33.0], [159.35, -32.75], [159.25, -32.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.510977928065813}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9915109831144673}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.71479000169404, 20.425084400825767, 20.842711099637654, 20.837020220075374, 20.792798614501976]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.280862426757835, 19.25671539306643, 19.77110315958663, 20.44470367431643, 20.649304962158226]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.030842035343628, -2.294624376969233, -1.8292867568074125, -1.5196701559853725, -1.4352561857996307]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.4104901842412687, -2.510977928065813, -2.122779467686655, -1.607021121807918, -1.481605395200745]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6822793956292466, -1.8781916663193012, -1.5118825075232392, -1.2867769059327367, -1.212952236976352]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8543252103873606, -2.297049100014744, -1.707603121551801, -1.3719253472039032, -1.2417247276201135]}}