{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:03.607013", "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": "2011-Dec-02_to_2011-Dec-04_312.0_-23.5"}, "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": 2011120000215}, "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": "December 02 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 04 2011"}, "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": 129201.77465876316}, "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": ["Brazil"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["South America"]}, "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 Atlantic 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": -23.5}, "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": 312.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "312.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 308.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 313.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.25, -25.0], [-52.03, -24.47], [-51.5, -24.25], [-51.25, -24.35], [-51.0, -24.25], [-50.75, -24.35], [-50.68, -24.32], [-50.53, -23.97], [-50.12, -23.8], [-50.25, -23.5], [-50.15, -23.25], [-50.25, -23.0], [-50.03, -22.47], [-49.5, -22.25], [-49.25, -22.35], [-49.0, -22.25], [-48.75, -22.35], [-48.5, -22.25], [-48.25, -22.35], [-48.0, -22.25], [-47.47, -22.47], [-47.32, -22.82], [-47.25, -22.85], [-47.0, -22.75], [-46.47, -22.97], [-46.25, -23.5], [-46.35, -23.75], [-46.25, -24.0], [-46.35, -24.25], [-46.32, -24.32], [-45.97, -24.47], [-45.75, -25.0], [-45.97, -25.53], [-46.32, -25.68], [-46.47, -26.03], [-46.82, -26.18], [-46.97, -26.53], [-47.5, -26.75], [-47.75, -26.65], [-47.82, -26.68], [-47.97, -27.03], [-48.5, -27.25], [-49.03, -27.03], [-49.18, -26.68], [-49.53, -26.53], [-49.68, -26.18], [-49.75, -26.15], [-50.0, -26.25], [-50.25, -26.15], [-50.5, -26.25], [-50.75, -26.15], [-51.0, -26.25], [-51.53, -26.03], [-51.68, -25.68], [-52.03, -25.53], [-52.25, -25.0]]]]}, "2011-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.25, -25.0], [-52.03, -24.47], [-51.5, -24.25], [-51.25, -24.35], [-51.0, -24.25], [-50.75, -24.35], [-50.68, -24.32], [-50.53, -23.97], [-50.12, -23.8], [-50.25, -23.5], [-50.15, -23.25], [-50.25, -23.0], [-50.03, -22.47], [-49.5, -22.25], [-49.25, -22.35], [-49.0, -22.25], [-48.75, -22.35], [-48.5, -22.25], [-48.25, -22.35], [-48.0, -22.25], [-47.47, -22.47], [-47.32, -22.82], [-47.25, -22.85], [-47.0, -22.75], [-46.47, -22.97], [-46.25, -23.5], [-46.35, -23.75], [-46.25, -24.0], [-46.35, -24.25], [-46.32, -24.32], [-45.97, -24.47], [-45.75, -25.0], [-45.97, -25.53], [-46.32, -25.68], [-46.47, -26.03], [-46.82, -26.18], [-46.97, -26.53], [-47.5, -26.75], [-47.75, -26.65], [-47.82, -26.68], [-47.97, -27.03], [-48.5, -27.25], [-49.03, -27.03], [-49.18, -26.68], [-49.53, -26.53], [-49.68, -26.18], [-49.75, -26.15], [-50.0, -26.25], [-50.25, -26.15], [-50.5, -26.25], [-50.75, -26.15], [-51.0, -26.25], [-51.53, -26.03], [-51.68, -25.68], [-52.03, -25.53], [-52.25, -25.0]]]]}, "2011-12-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.25, -25.0], [-52.03, -24.47], [-51.5, -24.25], [-51.25, -24.35], [-51.0, -24.25], [-50.75, -24.35], [-50.68, -24.32], [-50.53, -23.97], [-50.12, -23.8], [-50.25, -23.5], [-50.15, -23.25], [-50.25, -23.0], [-50.03, -22.47], [-49.5, -22.25], [-49.25, -22.35], [-49.0, -22.25], [-48.75, -22.35], [-48.5, -22.25], [-48.25, -22.35], [-48.0, -22.25], [-47.47, -22.47], [-47.32, -22.82], [-47.25, -22.85], [-47.0, -22.75], [-46.47, -22.97], [-46.25, -23.5], [-46.35, -23.75], [-46.25, -24.0], [-46.35, -24.25], [-46.32, -24.32], [-45.97, -24.47], [-45.75, -25.0], [-45.97, -25.53], [-46.32, -25.68], [-46.47, -26.03], [-46.82, -26.18], [-46.97, -26.53], [-47.5, -26.75], [-47.75, -26.65], [-47.82, -26.68], [-47.97, -27.03], [-48.5, -27.25], [-49.03, -27.03], [-49.18, -26.68], [-49.53, -26.53], [-49.68, -26.18], [-49.75, -26.15], [-50.0, -26.25], [-50.25, -26.15], [-50.5, -26.25], [-50.75, -26.15], [-51.0, -26.25], [-51.53, -26.03], [-51.68, -25.68], [-52.03, -25.53], [-52.25, -25.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.913570289117956}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.0530579892513257}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.669769452437492, 18.91705030444342, 19.51259617525784]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.403275954865933, 16.156713313397745, 16.845328408400803]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3834386677019554, -3.18382682193526, -2.591908478116761]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.913570289117956, -4.521454266104115, -3.787711855325597]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9581901104540247, -1.889315085037009, -1.5465835998393886]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4438813155369874, -2.5570280694539536, -1.9098843724156853]}}