{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:36.056199", "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-Apr-03_to_2017-Apr-06_290.0_-73.5"}, "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": 2017040000146}, "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": "April 03 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2017"}, "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": 64295.07372535653}, "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": ["W.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": -73.5}, "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": 290.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "290.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 284.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 295.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -73.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -68.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.0, -72.75], [-71.5, -72.96], [-71.0, -72.75], [-70.75, -72.85], [-70.5, -72.75], [-70.25, -72.85], [-70.0, -72.75], [-69.75, -72.85], [-69.5, -72.75], [-69.25, -72.85], [-69.0, -72.75], [-68.75, -72.85], [-68.5, -72.75], [-68.25, -72.85], [-68.0, -72.75], [-67.75, -72.85], [-67.5, -72.75], [-67.25, -72.85], [-67.0, -72.75], [-66.47, -72.97], [-66.25, -73.5], [-66.47, -74.03], [-67.0, -74.25], [-67.25, -74.15], [-67.5, -74.25], [-67.75, -74.15], [-68.0, -74.25], [-68.25, -74.15], [-68.5, -74.25], [-68.75, -74.15], [-69.0, -74.25], [-69.25, -74.15], [-69.5, -74.25], [-69.75, -74.15], [-70.0, -74.25], [-70.25, -74.15], [-70.5, -74.25], [-70.75, -74.15], [-71.0, -74.25], [-71.5, -74.04], [-72.0, -74.25], [-72.25, -74.15], [-72.5, -74.25], [-73.03, -74.03], [-73.25, -73.5], [-73.03, -72.97], [-72.5, -72.75], [-72.25, -72.85], [-72.0, -72.75]]], [[[-75.0, -72.25], [-74.75, -72.35], [-74.5, -72.25], [-73.97, -72.47], [-73.82, -72.82], [-73.47, -72.97], [-73.25, -73.5], [-73.47, -74.03], [-74.0, -74.25], [-74.25, -74.15], [-74.5, -74.25], [-75.03, -74.03], [-75.18, -73.68], [-75.53, -73.53], [-75.75, -73.0], [-75.53, -72.47], [-75.0, -72.25]]], [[[-65.75, -72.5], [-65.53, -71.97], [-65.0, -71.75], [-64.47, -71.97], [-64.25, -72.5], [-64.47, -73.03], [-65.0, -73.25], [-65.53, -73.03], [-65.75, -72.5]]], [[[-70.0, -68.25], [-69.47, -68.47], [-69.32, -68.82], [-69.25, -68.85], [-69.18, -68.82], [-69.03, -68.47], [-68.5, -68.25], [-67.97, -68.47], [-67.75, -69.0], [-67.97, -69.53], [-68.32, -69.68], [-68.47, -70.03], [-69.0, -70.25], [-69.25, -70.15], [-69.5, -70.25], [-70.03, -70.03], [-70.18, -69.68], [-70.53, -69.53], [-70.75, -69.0], [-70.53, -68.47], [-70.0, -68.25]]]]}, "2017-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, -73.0], [-75.53, -72.47], [-75.0, -72.25], [-74.75, -72.35], [-74.5, -72.25], [-73.97, -72.47], [-73.82, -72.82], [-73.75, -72.85], [-73.5, -72.75], [-73.25, -72.85], [-73.0, -72.75], [-72.75, -72.85], [-72.5, -72.75], [-72.25, -72.85], [-72.18, -72.82], [-72.03, -72.47], [-71.5, -72.25], [-71.25, -72.35], [-71.0, -72.25], [-70.75, -72.35], [-70.5, -72.25], [-70.25, -72.35], [-70.18, -72.32], [-70.03, -71.97], [-69.5, -71.75], [-69.25, -71.85], [-69.18, -71.82], [-69.03, -71.47], [-68.68, -71.32], [-68.62, -71.2], [-68.75, -71.15], [-69.0, -71.25], [-69.25, -71.15], [-69.5, -71.25], [-70.03, -71.03], [-70.25, -70.5], [-70.04, -70.0], [-70.18, -69.68], [-70.53, -69.53], [-70.75, -69.0], [-70.53, -68.47], [-70.0, -68.25], [-69.47, -68.47], [-69.32, -68.82], [-69.25, -68.85], [-69.18, -68.82], [-69.03, -68.47], [-68.5, -68.25], [-67.97, -68.47], [-67.75, -69.0], [-67.85, -69.25], [-67.82, -69.32], [-67.47, -69.47], [-67.32, -69.82], [-67.25, -69.85], [-67.0, -69.75], [-66.47, -69.97], [-66.32, -70.32], [-66.25, -70.35], [-66.0, -70.25], [-65.47, -70.47], [-65.25, -71.0], [-65.35, -71.25], [-65.32, -71.32], [-64.97, -71.47], [-64.82, -71.82], [-64.47, -71.97], [-64.25, -72.5], [-64.47, -73.03], [-64.82, -73.18], [-64.97, -73.53], [-65.5, -73.75], [-65.75, -73.65], [-66.0, -73.75], [-66.25, -73.65], [-66.32, -73.68], [-66.47, -74.03], [-67.0, -74.25], [-67.25, -74.15], [-67.5, -74.25], [-67.75, -74.15], [-68.0, -74.25], [-68.25, -74.15], [-68.5, -74.25], [-68.75, -74.15], [-69.0, -74.25], [-69.25, -74.15], [-69.5, -74.25], [-69.75, -74.15], [-70.0, -74.25], [-70.25, -74.15], [-70.5, -74.25], [-70.75, -74.15], [-71.0, -74.25], [-71.25, -74.15], [-71.5, -74.25], [-71.75, -74.15], [-72.0, -74.25], [-72.25, -74.15], [-72.5, -74.25], [-72.75, -74.15], [-73.0, -74.25], [-73.25, -74.15], [-73.5, -74.25], [-73.75, -74.15], [-74.0, -74.25], [-74.25, -74.15], [-74.5, -74.25], [-75.03, -74.03], [-75.18, -73.68], [-75.53, -73.53], [-75.75, -73.0]]]]}, "2017-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.75, -73.0], [-75.53, -72.47], [-75.0, -72.25], [-74.75, -72.35], [-74.5, -72.25], [-73.97, -72.47], [-73.82, -72.82], [-73.75, -72.85], [-73.5, -72.75], [-73.25, -72.85], [-73.0, -72.75], [-72.75, -72.85], [-72.5, -72.75], [-72.25, -72.85], [-72.18, -72.82], [-72.03, -72.47], [-71.5, -72.25], [-71.25, -72.35], [-71.0, -72.25], [-70.75, -72.35], [-70.5, -72.25], [-70.25, -72.35], [-70.18, -72.32], [-70.03, -71.97], [-69.5, -71.75], [-69.25, -71.85], [-69.18, -71.82], [-69.03, -71.47], [-68.68, -71.32], [-68.62, -71.2], [-68.75, -71.15], [-69.0, -71.25], [-69.25, -71.15], [-69.5, -71.25], [-70.03, -71.03], [-70.25, -70.5], [-70.04, -70.0], [-70.18, -69.68], [-70.53, -69.53], [-70.75, -69.0], [-70.53, -68.47], [-70.0, -68.25], [-69.47, -68.47], [-69.32, -68.82], [-69.25, -68.85], [-69.18, -68.82], [-69.03, -68.47], [-68.5, -68.25], [-67.97, -68.47], [-67.75, -69.0], [-67.85, -69.25], [-67.82, -69.32], [-67.47, -69.47], [-67.32, -69.82], [-67.25, -69.85], [-67.0, -69.75], [-66.47, -69.97], [-66.32, -70.32], [-66.25, -70.35], [-66.0, -70.25], [-65.47, -70.47], [-65.25, -71.0], [-65.35, -71.25], [-65.32, -71.32], [-64.97, -71.47], [-64.82, -71.82], [-64.47, -71.97], [-64.25, -72.5], [-64.47, -73.03], [-64.82, -73.18], [-64.97, -73.53], [-65.5, -73.75], [-65.75, -73.65], [-66.0, -73.75], [-66.25, -73.65], [-66.32, -73.68], [-66.47, -74.03], [-67.0, -74.25], [-67.25, -74.15], [-67.5, -74.25], [-67.75, -74.15], [-68.0, -74.25], [-68.25, -74.15], [-68.5, -74.25], [-68.75, -74.15], [-69.0, -74.25], [-69.25, -74.15], [-69.5, -74.25], [-69.75, -74.15], [-70.0, -74.25], [-70.25, -74.15], [-70.5, -74.25], [-70.75, -74.15], [-71.0, -74.25], [-71.25, -74.15], [-71.5, -74.25], [-71.75, -74.15], [-72.0, -74.25], [-72.25, -74.15], [-72.5, -74.25], [-72.75, -74.15], [-73.0, -74.25], [-73.25, -74.15], [-73.5, -74.25], [-73.75, -74.15], [-74.0, -74.25], [-74.25, -74.15], [-74.5, -74.25], [-75.03, -74.03], [-75.18, -73.68], [-75.53, -73.53], [-75.75, -73.0]]]]}, "2017-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-75.03, -74.03], [-75.25, -73.5], [-75.03, -72.97], [-74.5, -72.75], [-74.0, -72.96], [-73.5, -72.75], [-73.25, -72.85], [-73.0, -72.75], [-72.75, -72.85], [-72.5, -72.75], [-72.25, -72.85], [-72.18, -72.82], [-72.03, -72.47], [-71.5, -72.25], [-71.25, -72.35], [-71.0, -72.25], [-70.75, -72.35], [-70.5, -72.25], [-70.25, -72.35], [-70.18, -72.32], [-70.03, -71.97], [-69.5, -71.75], [-69.25, -71.85], [-69.18, -71.82], [-69.03, -71.47], [-68.68, -71.32], [-68.62, -71.2], [-68.75, -71.15], [-69.0, -71.25], [-69.25, -71.15], [-69.5, -71.25], [-70.03, -71.03], [-70.25, -70.5], [-70.03, -69.97], [-69.68, -69.82], [-69.53, -69.47], [-69.18, -69.32], [-69.03, -68.97], [-68.5, -68.75], [-67.97, -68.97], [-67.82, -69.32], [-67.47, -69.47], [-67.32, -69.82], [-67.25, -69.85], [-67.0, -69.75], [-66.47, -69.97], [-66.32, -70.32], [-66.25, -70.35], [-66.0, -70.25], [-65.47, -70.47], [-65.25, -71.0], [-65.35, -71.25], [-65.32, -71.32], [-64.97, -71.47], [-64.82, -71.82], [-64.47, -71.97], [-64.25, -72.5], [-64.47, -73.03], [-64.82, -73.18], [-64.97, -73.53], [-65.5, -73.75], [-65.75, -73.65], [-66.0, -73.75], [-66.25, -73.65], [-66.5, -73.75], [-66.75, -73.65], [-66.82, -73.68], [-66.97, -74.03], [-67.5, -74.25], [-67.75, -74.15], [-68.0, -74.25], [-68.25, -74.15], [-68.5, -74.25], [-68.75, -74.15], [-69.0, -74.25], [-69.25, -74.15], [-69.5, -74.25], [-69.75, -74.15], [-70.0, -74.25], [-70.25, -74.15], [-70.5, -74.25], [-70.75, -74.15], [-71.0, -74.25], [-71.25, -74.15], [-71.5, -74.25], [-71.75, -74.15], [-72.0, -74.25], [-72.25, -74.15], [-72.5, -74.25], [-72.75, -74.15], [-73.0, -74.25], [-73.25, -74.15], [-73.5, -74.25], [-74.0, -74.04], [-74.5, -74.25], [-75.03, -74.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.879333045054324}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.36781884961048}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-18.837884540148963, -18.975227781182042, -18.981439853074136, -18.416144337198432]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-24.68724243549954, -24.732753398771138, -24.440058542808515, -24.368823991600806]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.65184030297231, -8.637398764458405, -8.726278846995193, -7.894699797959527]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.363237016424051, -11.018440090348292, -11.879333045054324, -9.906230188745496]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5687601586166267, -1.7742288852273433, -1.8297404985219636, -1.6874977859161728]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8064762999170556, -2.7972228269655823, -2.2843444926341454, -2.064823944326557]}}