{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:28:50.530850", "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": "2022-Jan-02_to_2022-Jan-05_136.5_-72.5"}, "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": 2022010000199}, "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 02 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 05 2022"}, "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": 50138.754294670434}, "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": ["Antarctica"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Antarctica"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Antarctica"]}, "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": []}, "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": -72.5}, "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": 136.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "136.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 130.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -74.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -71.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.75, -74.0], [129.97, -73.47], [130.5, -73.25], [130.75, -73.35], [131.0, -73.25], [131.53, -73.47], [131.68, -73.82], [131.75, -73.85], [132.0, -73.75], [132.53, -73.97], [132.75, -74.5], [132.53, -75.03], [132.0, -75.25], [131.75, -75.15], [131.5, -75.25], [130.97, -75.03], [130.82, -74.68], [130.75, -74.65], [130.5, -74.75], [129.97, -74.53], [129.75, -74.0]]], [[[134.32, -72.32], [134.47, -71.97], [135.0, -71.75], [135.25, -71.85], [135.5, -71.75], [135.75, -71.85], [136.0, -71.75], [136.25, -71.85], [136.5, -71.75], [136.75, -71.85], [136.82, -71.82], [136.97, -71.47], [137.5, -71.25], [138.03, -71.47], [138.25, -72.0], [138.15, -72.25], [138.25, -72.5], [138.15, -72.75], [138.25, -73.0], [138.03, -73.53], [137.5, -73.75], [137.25, -73.65], [137.0, -73.75], [136.75, -73.65], [136.68, -73.68], [136.53, -74.03], [136.0, -74.25], [135.75, -74.15], [135.5, -74.25], [135.25, -74.15], [135.0, -74.25], [134.75, -74.15], [134.5, -74.25], [133.97, -74.03], [133.75, -73.5], [133.85, -73.25], [133.75, -73.0], [133.97, -72.47], [134.32, -72.32]]]]}, "2022-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.97, -73.47], [130.5, -73.25], [130.75, -73.35], [131.0, -73.25], [131.25, -73.35], [131.5, -73.25], [131.75, -73.35], [132.0, -73.25], [132.25, -73.35], [132.5, -73.25], [132.75, -73.35], [133.0, -73.25], [133.25, -73.35], [133.5, -73.25], [133.75, -73.35], [133.82, -73.32], [133.85, -73.25], [133.75, -73.0], [133.97, -72.47], [134.32, -72.32], [134.47, -71.97], [135.0, -71.75], [135.25, -71.85], [135.5, -71.75], [135.75, -71.85], [136.0, -71.75], [136.25, -71.85], [136.5, -71.75], [136.75, -71.85], [136.82, -71.82], [136.97, -71.47], [137.5, -71.25], [138.03, -71.47], [138.25, -72.0], [138.15, -72.25], [138.18, -72.32], [138.53, -72.47], [138.75, -73.0], [138.65, -73.25], [138.68, -73.32], [139.03, -73.47], [139.18, -73.82], [139.53, -73.97], [139.75, -74.5], [139.53, -75.03], [139.0, -75.25], [138.75, -75.15], [138.5, -75.25], [138.25, -75.15], [138.0, -75.25], [137.75, -75.15], [137.5, -75.25], [137.25, -75.15], [137.0, -75.25], [136.75, -75.15], [136.5, -75.25], [136.25, -75.15], [136.0, -75.25], [135.75, -75.15], [135.5, -75.25], [135.25, -75.15], [135.0, -75.25], [134.75, -75.15], [134.5, -75.25], [134.25, -75.15], [134.0, -75.25], [133.75, -75.15], [133.5, -75.25], [133.25, -75.15], [133.0, -75.25], [132.75, -75.15], [132.5, -75.25], [132.25, -75.15], [132.0, -75.25], [131.75, -75.15], [131.5, -75.25], [131.25, -75.15], [131.0, -75.25], [130.75, -75.15], [130.5, -75.25], [129.97, -75.03], [129.75, -74.5], [129.85, -74.25], [129.75, -74.0], [129.97, -73.47]]]]}, "2022-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.97, -73.47], [130.5, -73.25], [130.75, -73.35], [131.0, -73.25], [131.25, -73.35], [131.5, -73.25], [131.75, -73.35], [132.0, -73.25], [132.25, -73.35], [132.5, -73.25], [132.75, -73.35], [133.0, -73.25], [133.25, -73.35], [133.5, -73.25], [133.75, -73.35], [133.82, -73.32], [133.85, -73.25], [133.75, -73.0], [133.97, -72.47], [134.32, -72.32], [134.47, -71.97], [135.0, -71.75], [135.25, -71.85], [135.5, -71.75], [135.75, -71.85], [136.0, -71.75], [136.25, -71.85], [136.5, -71.75], [136.75, -71.85], [136.82, -71.82], [136.97, -71.47], [137.5, -71.25], [138.03, -71.47], [138.25, -72.0], [138.15, -72.25], [138.18, -72.32], [138.53, -72.47], [138.75, -73.0], [138.65, -73.25], [138.68, -73.32], [139.03, -73.47], [139.18, -73.82], [139.53, -73.97], [139.75, -74.5], [139.53, -75.03], [139.0, -75.25], [138.75, -75.15], [138.5, -75.25], [138.25, -75.15], [138.0, -75.25], [137.75, -75.15], [137.5, -75.25], [137.25, -75.15], [137.0, -75.25], [136.75, -75.15], [136.5, -75.25], [136.25, -75.15], [136.0, -75.25], [135.75, -75.15], [135.5, -75.25], [135.25, -75.15], [135.0, -75.25], [134.75, -75.15], [134.5, -75.25], [134.25, -75.15], [134.0, -75.25], [133.75, -75.15], [133.5, -75.25], [133.25, -75.15], [133.0, -75.25], [132.75, -75.15], [132.5, -75.25], [132.25, -75.15], [132.0, -75.25], [131.75, -75.15], [131.5, -75.25], [131.25, -75.15], [131.0, -75.25], [130.75, -75.15], [130.5, -75.25], [129.97, -75.03], [129.75, -74.5], [129.85, -74.25], [129.75, -74.0], [129.97, -73.47]]]]}, "2022-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.97, -73.47], [130.5, -73.25], [130.75, -73.35], [131.0, -73.25], [131.25, -73.35], [131.5, -73.25], [131.75, -73.35], [132.0, -73.25], [132.25, -73.35], [132.5, -73.25], [132.75, -73.35], [133.0, -73.25], [133.25, -73.35], [133.5, -73.25], [133.75, -73.35], [133.82, -73.32], [133.85, -73.25], [133.75, -73.0], [133.97, -72.47], [134.32, -72.32], [134.47, -71.97], [135.0, -71.75], [135.25, -71.85], [135.5, -71.75], [135.75, -71.85], [136.0, -71.75], [136.25, -71.85], [136.5, -71.75], [136.75, -71.85], [136.82, -71.82], [136.97, -71.47], [137.5, -71.25], [138.03, -71.47], [138.25, -72.0], [138.15, -72.25], [138.18, -72.32], [138.53, -72.47], [138.75, -73.0], [138.65, -73.25], [138.68, -73.32], [139.03, -73.47], [139.18, -73.82], [139.53, -73.97], [139.75, -74.5], [139.53, -75.03], [139.0, -75.25], [138.75, -75.15], [138.5, -75.25], [138.25, -75.15], [138.0, -75.25], [137.75, -75.15], [137.5, -75.25], [137.25, -75.15], [137.0, -75.25], [136.75, -75.15], [136.5, -75.25], [136.25, -75.15], [136.0, -75.25], [135.75, -75.15], [135.5, -75.25], [135.25, -75.15], [135.0, -75.25], [134.75, -75.15], [134.5, -75.25], [134.25, -75.15], [134.0, -75.25], [133.75, -75.15], [133.5, -75.25], [133.25, -75.15], [133.0, -75.25], [132.75, -75.15], [132.5, -75.25], [132.25, -75.15], [132.0, -75.25], [131.75, -75.15], [131.5, -75.25], [131.25, -75.15], [131.0, -75.25], [130.75, -75.15], [130.5, -75.25], [129.97, -75.03], [129.75, -74.5], [129.85, -74.25], [129.75, -74.0], [129.97, -73.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.950562086856962}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.0464196781806825}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-31.75069860481281, -32.08717886779431, -32.33327860798167, -32.35971707728581]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-33.23667865068785, -33.271440038919195, -33.33906550764209, -33.6588296227757]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.052524296901998, -3.915102761868604, -4.133469143657959, -4.088371583983257]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.77594930639512, -4.128428362535232, -4.706387823549619, -4.950562086856962]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3072027751634474, -1.284366471006403, -1.3285962255051276, -1.2972755660254023]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4796950065705659, -1.3889506122776012, -1.4596196903891159, -1.5015873309608287]}}