{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:39.163218", "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": "2019-May-01_to_2019-May-04_131.5_-67.0"}, "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": 2019050000012}, "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": "May 01 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 04 2019"}, "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": 92356.73197532266}, "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": ["Southern 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": -67.0}, "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": 131.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "131.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 138.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -68.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -65.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[127.5, -66.25], [127.75, -66.35], [128.0, -66.25], [128.25, -66.35], [128.5, -66.25], [128.75, -66.35], [129.0, -66.25], [129.25, -66.35], [129.5, -66.25], [129.75, -66.35], [130.0, -66.25], [130.25, -66.35], [130.5, -66.25], [130.75, -66.35], [130.82, -66.32], [130.97, -65.97], [131.5, -65.75], [131.75, -65.85], [132.0, -65.75], [132.25, -65.85], [132.5, -65.75], [133.03, -65.97], [133.18, -66.32], [133.25, -66.35], [133.32, -66.32], [133.47, -65.97], [134.0, -65.75], [134.25, -65.85], [134.5, -65.75], [134.75, -65.85], [135.0, -65.75], [135.25, -65.85], [135.5, -65.75], [135.75, -65.85], [136.0, -65.75], [136.5, -65.96], [137.0, -65.75], [137.25, -65.85], [137.5, -65.75], [137.75, -65.85], [138.0, -65.75], [138.25, -65.85], [138.5, -65.75], [139.03, -65.97], [139.25, -66.5], [139.03, -67.03], [138.5, -67.25], [138.25, -67.15], [138.0, -67.25], [137.75, -67.15], [137.68, -67.18], [137.53, -67.53], [137.0, -67.75], [136.75, -67.65], [136.5, -67.75], [136.25, -67.65], [136.0, -67.75], [135.75, -67.65], [135.5, -67.75], [135.25, -67.65], [135.0, -67.75], [134.75, -67.65], [134.5, -67.75], [134.25, -67.65], [134.0, -67.75], [133.75, -67.65], [133.68, -67.68], [133.53, -68.03], [133.0, -68.25], [132.75, -68.15], [132.5, -68.25], [132.25, -68.15], [132.0, -68.25], [131.75, -68.15], [131.68, -68.18], [131.53, -68.53], [131.0, -68.75], [130.75, -68.65], [130.5, -68.75], [130.25, -68.65], [130.0, -68.75], [129.75, -68.65], [129.5, -68.75], [129.25, -68.65], [129.0, -68.75], [128.75, -68.65], [128.5, -68.75], [128.25, -68.65], [128.0, -68.75], [127.47, -68.53], [127.32, -68.18], [127.25, -68.15], [127.0, -68.25], [126.47, -68.03], [126.25, -67.5], [126.47, -66.97], [126.82, -66.82], [126.97, -66.47], [127.5, -66.25]]]]}, "2019-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.46, -66.5], [126.25, -66.0], [126.47, -65.47], [127.0, -65.25], [127.25, -65.35], [127.32, -65.32], [127.47, -64.97], [128.0, -64.75], [128.53, -64.97], [128.68, -65.32], [128.75, -65.35], [129.0, -65.25], [129.25, -65.35], [129.5, -65.25], [129.75, -65.35], [130.0, -65.25], [130.53, -65.47], [130.68, -65.82], [130.75, -65.85], [130.82, -65.82], [130.97, -65.47], [131.5, -65.25], [131.75, -65.35], [132.0, -65.25], [132.25, -65.35], [132.5, -65.25], [132.75, -65.35], [133.0, -65.25], [133.25, -65.35], [133.5, -65.25], [133.75, -65.35], [134.0, -65.25], [134.53, -65.47], [134.68, -65.82], [134.75, -65.85], [135.0, -65.75], [135.25, -65.85], [135.5, -65.75], [135.75, -65.85], [136.0, -65.75], [136.25, -65.85], [136.5, -65.75], [136.75, -65.85], [137.0, -65.75], [137.25, -65.85], [137.5, -65.75], [137.75, -65.85], [138.0, -65.75], [138.25, -65.85], [138.5, -65.75], [139.03, -65.97], [139.25, -66.5], [139.03, -67.03], [138.5, -67.25], [138.25, -67.15], [138.0, -67.25], [137.75, -67.15], [137.68, -67.18], [137.53, -67.53], [137.0, -67.75], [136.75, -67.65], [136.5, -67.75], [136.25, -67.65], [136.0, -67.75], [135.75, -67.65], [135.5, -67.75], [135.25, -67.65], [135.0, -67.75], [134.75, -67.65], [134.5, -67.75], [134.25, -67.65], [134.0, -67.75], [133.75, -67.65], [133.68, -67.68], [133.53, -68.03], [133.0, -68.25], [132.75, -68.15], [132.5, -68.25], [132.25, -68.15], [132.0, -68.25], [131.75, -68.15], [131.68, -68.18], [131.53, -68.53], [131.0, -68.75], [130.75, -68.65], [130.5, -68.75], [130.25, -68.65], [130.0, -68.75], [129.75, -68.65], [129.5, -68.75], [129.25, -68.65], [129.0, -68.75], [128.75, -68.65], [128.5, -68.75], [128.25, -68.65], [128.0, -68.75], [127.47, -68.53], [127.32, -68.18], [127.25, -68.15], [127.0, -68.25], [126.47, -68.03], [126.25, -67.5], [126.35, -67.25], [126.25, -67.0], [126.46, -66.5]]]]}, "2019-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.46, -66.5], [126.25, -66.0], [126.47, -65.47], [127.0, -65.25], [127.25, -65.35], [127.32, -65.32], [127.47, -64.97], [128.0, -64.75], [128.53, -64.97], [128.68, -65.32], [128.75, -65.35], [129.0, -65.25], [129.25, -65.35], [129.5, -65.25], [129.75, -65.35], [130.0, -65.25], [130.53, -65.47], [130.68, -65.82], [130.75, -65.85], [130.82, -65.82], [130.97, -65.47], [131.5, -65.25], [131.75, -65.35], [132.0, -65.25], [132.25, -65.35], [132.5, -65.25], [132.75, -65.35], [133.0, -65.25], [133.25, -65.35], [133.5, -65.25], [133.75, -65.35], [134.0, -65.25], [134.53, -65.47], [134.68, -65.82], [134.75, -65.85], [135.0, -65.75], [135.25, -65.85], [135.5, -65.75], [135.75, -65.85], [136.0, -65.75], [136.25, -65.85], [136.5, -65.75], [136.75, -65.85], [137.0, -65.75], [137.25, -65.85], [137.5, -65.75], [137.75, -65.85], [138.0, -65.75], [138.25, -65.85], [138.5, -65.75], [139.03, -65.97], [139.25, -66.5], [139.03, -67.03], [138.5, -67.25], [138.25, -67.15], [138.0, -67.25], [137.75, -67.15], [137.68, -67.18], [137.53, -67.53], [137.0, -67.75], [136.75, -67.65], [136.5, -67.75], [136.25, -67.65], [136.0, -67.75], [135.75, -67.65], [135.5, -67.75], [135.25, -67.65], [135.0, -67.75], [134.75, -67.65], [134.5, -67.75], [134.25, -67.65], [134.0, -67.75], [133.75, -67.65], [133.68, -67.68], [133.53, -68.03], [133.0, -68.25], [132.75, -68.15], [132.5, -68.25], [132.25, -68.15], [132.0, -68.25], [131.75, -68.15], [131.68, -68.18], [131.53, -68.53], [131.0, -68.75], [130.75, -68.65], [130.5, -68.75], [130.25, -68.65], [130.0, -68.75], [129.75, -68.65], [129.5, -68.75], [129.25, -68.65], [129.0, -68.75], [128.75, -68.65], [128.5, -68.75], [128.25, -68.65], [128.0, -68.75], [127.47, -68.53], [127.32, -68.18], [127.25, -68.15], [127.0, -68.25], [126.47, -68.03], [126.25, -67.5], [126.35, -67.25], [126.25, -67.0], [126.46, -66.5]]]]}, "2019-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[126.46, -66.5], [126.25, -66.0], [126.47, -65.47], [127.0, -65.25], [127.25, -65.35], [127.32, -65.32], [127.47, -64.97], [128.0, -64.75], [128.53, -64.97], [128.68, -65.32], [128.75, -65.35], [129.0, -65.25], [129.25, -65.35], [129.5, -65.25], [129.75, -65.35], [130.0, -65.25], [130.53, -65.47], [130.68, -65.82], [130.75, -65.85], [130.82, -65.82], [130.97, -65.47], [131.5, -65.25], [131.75, -65.35], [132.0, -65.25], [132.25, -65.35], [132.5, -65.25], [132.75, -65.35], [133.0, -65.25], [133.25, -65.35], [133.5, -65.25], [133.75, -65.35], [134.0, -65.25], [134.53, -65.47], [134.68, -65.82], [134.75, -65.85], [135.0, -65.75], [135.25, -65.85], [135.5, -65.75], [135.75, -65.85], [136.0, -65.75], [136.25, -65.85], [136.5, -65.75], [136.75, -65.85], [137.0, -65.75], [137.25, -65.85], [137.5, -65.75], [138.03, -65.97], [138.25, -66.5], [138.03, -67.03], [137.68, -67.18], [137.53, -67.53], [137.0, -67.75], [136.75, -67.65], [136.5, -67.75], [136.25, -67.65], [136.0, -67.75], [135.75, -67.65], [135.5, -67.75], [135.25, -67.65], [135.0, -67.75], [134.75, -67.65], [134.5, -67.75], [134.25, -67.65], [134.0, -67.75], [133.75, -67.65], [133.68, -67.68], [133.53, -68.03], [133.0, -68.25], [132.75, -68.15], [132.5, -68.25], [132.25, -68.15], [132.0, -68.25], [131.75, -68.15], [131.68, -68.18], [131.53, -68.53], [131.0, -68.75], [130.75, -68.65], [130.5, -68.75], [130.25, -68.65], [130.0, -68.75], [129.75, -68.65], [129.5, -68.75], [129.25, -68.65], [129.0, -68.75], [128.75, -68.65], [128.5, -68.75], [128.25, -68.65], [128.0, -68.75], [127.47, -68.53], [127.32, -68.18], [127.25, -68.15], [127.0, -68.25], [126.47, -68.03], [126.25, -67.5], [126.35, -67.25], [126.25, -67.0], [126.46, -66.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.929936484506754}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.374965310472778}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-30.276774440286005, -27.818499530128634, -28.299673262228026, -28.39890434924024]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-39.06409632392459, -39.20505172712956, -38.41579884769848, -38.679370033426636]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.21764336702703, -8.281305102106295, -8.592908243710383, -8.357640022376508]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.120217086659608, -10.834690856933804, -10.929936484506754, -10.542180982000758]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5545776424932005, -1.643701257248617, -1.6360567303856204, -1.543909367283057]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7298515010987463, -2.0653293668139834, -2.1384629390531473, -1.7812715552843388]}}