{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:23.655476", "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": "2024-Oct-25_to_2024-Oct-27_168.5_-48.5"}, "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": 2024100000460}, "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": "October 25 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 27 2024"}, "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": 53693.05768072193}, "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 Zealand"]}, "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": -48.5}, "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": 168.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "168.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 166.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 170.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -49.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -47.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[166.5, -46.25], [166.75, -46.35], [167.0, -46.25], [167.25, -46.35], [167.5, -46.25], [168.03, -46.47], [168.18, -46.82], [168.25, -46.85], [168.5, -46.75], [168.75, -46.85], [169.0, -46.75], [169.53, -46.97], [169.68, -47.32], [170.03, -47.47], [170.25, -48.0], [170.15, -48.25], [170.18, -48.32], [170.53, -48.47], [170.75, -49.0], [170.53, -49.53], [170.0, -49.75], [169.75, -49.65], [169.5, -49.75], [169.25, -49.65], [169.0, -49.75], [168.75, -49.65], [168.5, -49.75], [168.25, -49.65], [168.0, -49.75], [167.47, -49.53], [167.32, -49.18], [167.25, -49.15], [167.0, -49.25], [166.47, -49.03], [166.25, -48.5], [166.35, -48.25], [166.32, -48.18], [165.97, -48.03], [165.75, -47.5], [165.85, -47.25], [165.75, -47.0], [165.97, -46.47], [166.5, -46.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["New-Zealand"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[165.75, -47.0], [165.97, -46.47], [166.5, -46.25], [166.75, -46.35], [167.0, -46.25], [167.25, -46.35], [167.5, -46.25], [168.03, -46.47], [168.18, -46.82], [168.25, -46.85], [168.5, -46.75], [168.75, -46.85], [169.0, -46.75], [169.53, -46.97], [169.68, -47.32], [170.03, -47.47], [170.25, -48.0], [170.15, -48.25], [170.18, -48.32], [170.53, -48.47], [170.75, -49.0], [170.53, -49.53], [170.0, -49.75], [169.75, -49.65], [169.5, -49.75], [169.25, -49.65], [169.0, -49.75], [168.75, -49.65], [168.5, -49.75], [168.25, -49.65], [168.0, -49.75], [167.47, -49.53], [167.32, -49.18], [167.25, -49.15], [167.0, -49.25], [166.47, -49.03], [166.25, -48.5], [166.35, -48.25], [166.32, -48.18], [165.97, -48.03], [165.75, -47.5], [165.85, -47.25], [165.75, -47.0]]]]}, "2024-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[165.75, -47.0], [165.97, -46.47], [166.5, -46.25], [166.75, -46.35], [167.0, -46.25], [167.25, -46.35], [167.5, -46.25], [168.03, -46.47], [168.18, -46.82], [168.25, -46.85], [168.5, -46.75], [168.75, -46.85], [169.0, -46.75], [169.53, -46.97], [169.68, -47.32], [170.03, -47.47], [170.25, -48.0], [170.15, -48.25], [170.18, -48.32], [170.53, -48.47], [170.75, -49.0], [170.53, -49.53], [170.0, -49.75], [169.75, -49.65], [169.5, -49.75], [169.25, -49.65], [169.0, -49.75], [168.75, -49.65], [168.5, -49.75], [168.25, -49.65], [168.0, -49.75], [167.47, -49.53], [167.32, -49.18], [167.25, -49.15], [167.0, -49.25], [166.47, -49.03], [166.25, -48.5], [166.35, -48.25], [166.32, -48.18], [165.97, -48.03], [165.75, -47.5], [165.85, -47.25], [165.75, -47.0]]]]}, "2024-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[165.75, -47.0], [165.97, -46.47], [166.5, -46.25], [166.75, -46.35], [167.0, -46.25], [167.25, -46.35], [167.5, -46.25], [168.03, -46.47], [168.18, -46.82], [168.25, -46.85], [168.5, -46.75], [168.75, -46.85], [169.0, -46.75], [169.53, -46.97], [169.68, -47.32], [170.03, -47.47], [170.25, -48.0], [170.15, -48.25], [170.18, -48.32], [170.53, -48.47], [170.75, -49.0], [170.53, -49.53], [170.0, -49.75], [169.75, -49.65], [169.5, -49.75], [169.25, -49.65], [169.0, -49.75], [168.75, -49.65], [168.5, -49.75], [168.25, -49.65], [168.0, -49.75], [167.47, -49.53], [167.32, -49.18], [167.25, -49.15], [167.0, -49.25], [166.47, -49.03], [166.25, -48.5], [166.35, -48.25], [166.32, -48.18], [165.97, -48.03], [165.75, -47.5], [165.85, -47.25], [165.75, -47.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.6555616640770268}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.9169132822062567}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.9266938038361445, 7.426832306690756, 7.494663981902306]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.891208902994833, 6.808292643229208, 6.835515594482445]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.2049380022479963, -1.7878093929590675, -1.7579924514117062]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6555616640770268, -2.2416133581610325, -2.104006308730561]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.763511295461928, -1.437139244739155, -1.3777658344181372]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.073542815258616, -1.6705432724039386, -1.506565713000632]}}