{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:02.945302", "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": "2017-Jan-18_to_2017-Jan-20_171.0_-47.5"}, "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": 2017010000678}, "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": "January 18 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 20 2017"}, "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": 51923.890601330764}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "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": ["South Pacific Ocean"]}, "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": -47.5}, "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": 171.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "171.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 169.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 173.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -46.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[168.75, -46.5], [168.97, -45.97], [169.5, -45.75], [170.0, -45.96], [170.5, -45.75], [170.75, -45.85], [171.0, -45.75], [171.53, -45.97], [171.68, -46.32], [172.03, -46.47], [172.18, -46.82], [172.25, -46.85], [172.5, -46.75], [173.03, -46.97], [173.25, -47.5], [173.15, -47.75], [173.18, -47.82], [173.53, -47.97], [173.75, -48.5], [173.53, -49.03], [173.18, -49.18], [173.03, -49.53], [172.5, -49.75], [172.25, -49.65], [172.0, -49.75], [171.47, -49.53], [171.32, -49.18], [171.25, -49.15], [171.0, -49.25], [170.75, -49.15], [170.5, -49.25], [170.25, -49.15], [170.0, -49.25], [169.47, -49.03], [169.25, -48.5], [169.47, -47.97], [169.88, -47.8], [169.82, -47.68], [169.47, -47.53], [169.32, -47.18], [168.97, -47.03], [168.75, -46.5]]]]}, "2017-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[168.75, -46.5], [168.97, -45.97], [169.5, -45.75], [170.0, -45.96], [170.5, -45.75], [170.75, -45.85], [171.0, -45.75], [171.53, -45.97], [171.68, -46.32], [172.03, -46.47], [172.18, -46.82], [172.25, -46.85], [172.5, -46.75], [173.03, -46.97], [173.25, -47.5], [173.15, -47.75], [173.18, -47.82], [173.53, -47.97], [173.75, -48.5], [173.53, -49.03], [173.18, -49.18], [173.03, -49.53], [172.5, -49.75], [172.25, -49.65], [172.0, -49.75], [171.47, -49.53], [171.32, -49.18], [171.25, -49.15], [171.0, -49.25], [170.75, -49.15], [170.5, -49.25], [170.25, -49.15], [170.0, -49.25], [169.47, -49.03], [169.25, -48.5], [169.47, -47.97], [169.88, -47.8], [169.82, -47.68], [169.47, -47.53], [169.32, -47.18], [168.97, -47.03], [168.75, -46.5]]]]}, "2017-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[168.75, -46.5], [168.97, -45.97], [169.5, -45.75], [170.0, -45.96], [170.5, -45.75], [170.75, -45.85], [171.0, -45.75], [171.53, -45.97], [171.68, -46.32], [172.03, -46.47], [172.18, -46.82], [172.25, -46.85], [172.5, -46.75], [173.03, -46.97], [173.25, -47.5], [173.15, -47.75], [173.18, -47.82], [173.53, -47.97], [173.75, -48.5], [173.53, -49.03], [173.18, -49.18], [173.03, -49.53], [172.5, -49.75], [172.25, -49.65], [172.0, -49.75], [171.47, -49.53], [171.32, -49.18], [171.25, -49.15], [171.0, -49.25], [170.75, -49.15], [170.5, -49.25], [170.25, -49.15], [170.0, -49.25], [169.47, -49.03], [169.25, -48.5], [169.47, -47.97], [169.88, -47.8], [169.82, -47.68], [169.47, -47.53], [169.32, -47.18], [168.97, -47.03], [168.75, -46.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.452820367112679}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.321522753771335}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.822170373651431, 8.535924362989022, 10.02587398042823]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.21556686475418, 8.087948712222328, 9.574755592934707]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.9261463355864954, -3.240618251156038, -1.7978036745714712]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.5127406492056252, -5.452820367112679, -3.9456450230492806]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5244007870525538, -2.6128261819697745, -1.424079048749946]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6995704857992935, -2.7415752229526342, -1.567725640965698]}}