{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:57:56.258459", "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": "2025-Dec-11_to_2025-Dec-14_307.5_-24.0"}, "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": 2025120000401}, "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 11 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 14 2025"}, "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": 82341.81750092842}, "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": []}, "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": -24.0}, "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": 307.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "307.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 306.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 310.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-53.0, -23.75], [-52.47, -23.97], [-52.25, -24.5], [-52.47, -25.03], [-53.0, -25.25], [-53.53, -25.03], [-53.75, -24.5], [-53.53, -23.97], [-53.0, -23.75]]]]}, "2025-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.03, -22.97], [-53.68, -22.82], [-53.53, -22.47], [-53.18, -22.32], [-53.03, -21.97], [-52.5, -21.75], [-52.25, -21.85], [-52.0, -21.75], [-51.75, -21.85], [-51.5, -21.75], [-51.0, -21.96], [-50.5, -21.75], [-50.25, -21.85], [-50.0, -21.75], [-49.75, -21.85], [-49.5, -21.75], [-48.97, -21.97], [-48.75, -22.5], [-48.85, -22.75], [-48.75, -23.0], [-48.85, -23.25], [-48.75, -23.5], [-48.97, -24.03], [-49.5, -24.25], [-49.75, -24.15], [-50.0, -24.25], [-50.25, -24.15], [-50.5, -24.25], [-50.75, -24.15], [-50.82, -24.18], [-50.97, -24.53], [-51.5, -24.75], [-51.75, -24.65], [-52.0, -24.75], [-52.25, -24.65], [-52.32, -24.68], [-52.47, -25.03], [-53.0, -25.25], [-53.53, -25.03], [-53.68, -24.68], [-54.03, -24.53], [-54.25, -24.0], [-54.15, -23.75], [-54.25, -23.5], [-54.03, -22.97]]]]}, "2025-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.03, -22.97], [-53.68, -22.82], [-53.53, -22.47], [-53.18, -22.32], [-53.03, -21.97], [-52.5, -21.75], [-52.25, -21.85], [-52.0, -21.75], [-51.75, -21.85], [-51.5, -21.75], [-51.0, -21.96], [-50.5, -21.75], [-50.25, -21.85], [-50.0, -21.75], [-49.75, -21.85], [-49.5, -21.75], [-48.97, -21.97], [-48.75, -22.5], [-48.85, -22.75], [-48.75, -23.0], [-48.85, -23.25], [-48.75, -23.5], [-48.97, -24.03], [-49.5, -24.25], [-49.75, -24.15], [-50.0, -24.25], [-50.25, -24.15], [-50.5, -24.25], [-50.75, -24.15], [-50.82, -24.18], [-50.97, -24.53], [-51.5, -24.75], [-51.75, -24.65], [-52.0, -24.75], [-52.25, -24.65], [-52.32, -24.68], [-52.47, -25.03], [-53.0, -25.25], [-53.53, -25.03], [-53.68, -24.68], [-54.03, -24.53], [-54.25, -24.0], [-54.15, -23.75], [-54.25, -23.5], [-54.03, -22.97]]]]}, "2025-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-54.03, -22.97], [-53.68, -22.82], [-53.53, -22.47], [-53.18, -22.32], [-53.03, -21.97], [-52.5, -21.75], [-52.25, -21.85], [-52.0, -21.75], [-51.75, -21.85], [-51.5, -21.75], [-51.0, -21.96], [-50.5, -21.75], [-50.25, -21.85], [-50.0, -21.75], [-49.75, -21.85], [-49.5, -21.75], [-48.97, -21.97], [-48.75, -22.5], [-48.85, -22.75], [-48.75, -23.0], [-48.85, -23.25], [-48.75, -23.5], [-48.97, -24.03], [-49.5, -24.25], [-49.75, -24.15], [-50.0, -24.25], [-50.25, -24.15], [-50.5, -24.25], [-50.75, -24.15], [-50.82, -24.18], [-50.97, -24.53], [-51.5, -24.75], [-51.75, -24.65], [-52.0, -24.75], [-52.25, -24.65], [-52.5, -24.75], [-52.75, -24.65], [-53.0, -24.75], [-53.25, -24.65], [-53.5, -24.75], [-54.03, -24.53], [-54.25, -24.0], [-54.15, -23.75], [-54.25, -23.5], [-54.03, -22.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.492612569885239}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.231710969197313}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [21.859155273437523, 21.47976082988174, 21.378286331001448, 21.991569410051625]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [21.859155273437523, 18.603267923990927, 19.908447519938193, 20.811172739664755]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.297226725812493, -3.308808276708803, -3.47633469046884, -2.93187434093579]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.297226725812493, -5.492612569885239, -3.91226831909421, -3.5911969567058577]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3322912508561315, -1.946336172229293, -2.066965678695277, -1.7146074844692403]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3322912508561315, -3.2089874840005916, -2.253080977089615, -2.137338548723344]}}