{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:22:56.857553", "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": "2021-Jan-28_to_2021-Jan-31_174.0_-40.0"}, "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": 2021010001056}, "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 28 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 2021"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 95089.25653095022}, "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": ["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": -40.0}, "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": 174.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "174.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 171.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 176.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -41.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -38.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[170.85, -38.75], [170.75, -38.5], [170.97, -37.97], [171.5, -37.75], [172.03, -37.97], [172.18, -38.32], [172.25, -38.35], [172.5, -38.25], [172.75, -38.35], [173.0, -38.25], [173.25, -38.35], [173.5, -38.25], [173.75, -38.35], [174.0, -38.25], [174.25, -38.35], [174.32, -38.32], [174.47, -37.97], [175.0, -37.75], [175.25, -37.85], [175.5, -37.75], [176.03, -37.97], [176.25, -38.5], [176.15, -38.75], [176.25, -39.0], [176.15, -39.25], [176.25, -39.5], [176.15, -39.75], [176.18, -39.82], [176.53, -39.97], [176.75, -40.5], [176.53, -41.03], [176.18, -41.18], [176.03, -41.53], [175.5, -41.75], [175.25, -41.65], [175.0, -41.75], [174.75, -41.65], [174.5, -41.75], [173.97, -41.53], [173.82, -41.18], [173.75, -41.15], [173.5, -41.25], [173.25, -41.15], [173.0, -41.25], [172.75, -41.15], [172.5, -41.25], [171.97, -41.03], [171.82, -40.68], [171.47, -40.53], [171.32, -40.18], [170.97, -40.03], [170.75, -39.5], [170.85, -39.25], [170.75, -39.0], [170.85, -38.75]]]]}, "2021-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[170.85, -38.75], [170.75, -38.5], [170.97, -37.97], [171.5, -37.75], [172.03, -37.97], [172.18, -38.32], [172.25, -38.35], [172.5, -38.25], [172.75, -38.35], [173.0, -38.25], [173.25, -38.35], [173.5, -38.25], [173.75, -38.35], [174.0, -38.25], [174.25, -38.35], [174.32, -38.32], [174.47, -37.97], [175.0, -37.75], [175.25, -37.85], [175.5, -37.75], [176.03, -37.97], [176.25, -38.5], [176.15, -38.75], [176.25, -39.0], [176.15, -39.25], [176.25, -39.5], [176.15, -39.75], [176.18, -39.82], [176.53, -39.97], [176.75, -40.5], [176.53, -41.03], [176.18, -41.18], [176.03, -41.53], [175.5, -41.75], [175.25, -41.65], [175.0, -41.75], [174.75, -41.65], [174.5, -41.75], [173.97, -41.53], [173.82, -41.18], [173.75, -41.15], [173.5, -41.25], [173.25, -41.15], [173.0, -41.25], [172.75, -41.15], [172.5, -41.25], [171.97, -41.03], [171.82, -40.68], [171.47, -40.53], [171.32, -40.18], [170.97, -40.03], [170.75, -39.5], [170.85, -39.25], [170.75, -39.0], [170.85, -38.75]]]]}, "2021-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[170.85, -38.75], [170.75, -38.5], [170.97, -37.97], [171.5, -37.75], [172.03, -37.97], [172.18, -38.32], [172.25, -38.35], [172.5, -38.25], [172.75, -38.35], [173.0, -38.25], [173.25, -38.35], [173.5, -38.25], [173.75, -38.35], [174.0, -38.25], [174.25, -38.35], [174.32, -38.32], [174.47, -37.97], [175.0, -37.75], [175.25, -37.85], [175.5, -37.75], [176.03, -37.97], [176.25, -38.5], [176.15, -38.75], [176.25, -39.0], [176.15, -39.25], [176.25, -39.5], [176.15, -39.75], [176.18, -39.82], [176.53, -39.97], [176.75, -40.5], [176.53, -41.03], [176.18, -41.18], [176.03, -41.53], [175.5, -41.75], [175.25, -41.65], [175.0, -41.75], [174.75, -41.65], [174.5, -41.75], [173.97, -41.53], [173.82, -41.18], [173.75, -41.15], [173.5, -41.25], [173.25, -41.15], [173.0, -41.25], [172.75, -41.15], [172.5, -41.25], [171.97, -41.03], [171.82, -40.68], [171.47, -40.53], [171.32, -40.18], [170.97, -40.03], [170.75, -39.5], [170.85, -39.25], [170.75, -39.0], [170.85, -38.75]]]]}, "2021-01-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[173.47, -40.53], [173.25, -40.0], [173.47, -39.47], [174.0, -39.25], [174.25, -39.35], [174.5, -39.25], [175.03, -39.47], [175.25, -40.0], [175.03, -40.53], [174.5, -40.75], [174.25, -40.65], [174.0, -40.75], [173.47, -40.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.624228903894391}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.929192592104346}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.9345744296931, 14.0924303675788, 14.763689553797974, 15.717354732017498]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.519947421416362, 8.93472977754476, 9.928583520638938, 15.57487895470149]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6166623509736566, -3.4516410520761482, -2.7720876632018148, -1.8729267933327094]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.077301339431244, -6.624228903894391, -5.600668379401043, -1.885130607233748]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5985838856908896, -2.022104233810608, -1.5960482938225868, -1.3861391674376358]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.042541470328261, -2.538078312553997, -2.03178002021638, -1.4233308587846616]}}