{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-27 23:16:37.875810", "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": "2026-Aug-09_to_2026-Aug-13_294.5_-27.5"}, "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": 2026080000310}, "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": "August 09 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 13 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 60546.74141828529}, "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": ["Argentina"]}, "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": -27.5}, "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": 294.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "294.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 294.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 297.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -25.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.15, -27.75], [-66.25, -27.5], [-66.03, -26.97], [-65.5, -26.75], [-64.97, -26.97], [-64.75, -27.5], [-64.85, -27.75], [-64.75, -28.0], [-64.85, -28.25], [-64.75, -28.5], [-64.97, -29.03], [-65.5, -29.25], [-66.03, -29.03], [-66.25, -28.5], [-66.15, -28.25], [-66.25, -28.0], [-66.15, -27.75]]]]}, "2026-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.15, -27.75], [-66.25, -27.5], [-66.15, -27.25], [-66.25, -27.0], [-66.03, -26.47], [-65.5, -26.25], [-64.97, -26.47], [-64.75, -27.0], [-64.85, -27.25], [-64.75, -27.5], [-64.85, -27.75], [-64.75, -28.0], [-64.85, -28.25], [-64.75, -28.5], [-64.97, -29.03], [-65.5, -29.25], [-66.03, -29.03], [-66.25, -28.5], [-66.15, -28.25], [-66.25, -28.0], [-66.15, -27.75]]]]}, "2026-08-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.15, -27.75], [-66.25, -27.5], [-66.15, -27.25], [-66.25, -27.0], [-66.03, -26.47], [-65.68, -26.32], [-65.53, -25.97], [-65.18, -25.82], [-65.03, -25.47], [-64.5, -25.25], [-64.25, -25.35], [-64.18, -25.32], [-64.03, -24.97], [-63.5, -24.75], [-62.97, -24.97], [-62.82, -25.32], [-62.47, -25.47], [-62.32, -25.82], [-61.97, -25.97], [-61.75, -26.5], [-61.97, -27.03], [-62.5, -27.25], [-62.75, -27.15], [-63.0, -27.25], [-63.25, -27.15], [-63.5, -27.25], [-63.8, -27.12], [-63.85, -27.25], [-63.75, -27.5], [-63.85, -27.75], [-63.75, -28.0], [-63.97, -28.53], [-64.32, -28.68], [-64.35, -28.75], [-64.25, -29.0], [-64.47, -29.53], [-65.0, -29.75], [-65.53, -29.53], [-65.68, -29.18], [-66.03, -29.03], [-66.25, -28.5], [-66.15, -28.25], [-66.25, -28.0], [-66.15, -27.75]]]]}, "2026-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.15, -27.75], [-66.25, -27.5], [-66.15, -27.25], [-66.25, -27.0], [-66.03, -26.47], [-65.68, -26.32], [-65.53, -25.97], [-65.18, -25.82], [-65.03, -25.47], [-64.5, -25.25], [-64.25, -25.35], [-64.18, -25.32], [-64.03, -24.97], [-63.5, -24.75], [-62.97, -24.97], [-62.82, -25.32], [-62.47, -25.47], [-62.32, -25.82], [-61.97, -25.97], [-61.75, -26.5], [-61.97, -27.03], [-62.5, -27.25], [-62.75, -27.15], [-63.0, -27.25], [-63.25, -27.15], [-63.5, -27.25], [-63.8, -27.12], [-63.85, -27.25], [-63.75, -27.5], [-63.85, -27.75], [-63.75, -28.0], [-63.97, -28.53], [-64.32, -28.68], [-64.35, -28.75], [-64.25, -29.0], [-64.47, -29.53], [-65.0, -29.75], [-65.53, -29.53], [-65.68, -29.18], [-66.03, -29.03], [-66.25, -28.5], [-66.15, -28.25], [-66.25, -28.0], [-66.15, -27.75]]]]}, "2026-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-66.03, -26.97], [-65.68, -26.82], [-65.65, -26.75], [-65.75, -26.5], [-65.53, -25.97], [-65.18, -25.82], [-65.03, -25.47], [-64.5, -25.25], [-64.25, -25.35], [-64.18, -25.32], [-64.03, -24.97], [-63.5, -24.75], [-62.97, -24.97], [-62.82, -25.32], [-62.47, -25.47], [-62.32, -25.82], [-61.97, -25.97], [-61.75, -26.5], [-61.97, -27.03], [-62.5, -27.25], [-62.75, -27.15], [-63.0, -27.25], [-63.25, -27.15], [-63.5, -27.25], [-63.8, -27.12], [-63.85, -27.25], [-63.75, -27.5], [-63.85, -27.75], [-63.75, -28.0], [-63.97, -28.53], [-64.32, -28.68], [-64.35, -28.75], [-64.25, -29.0], [-64.47, -29.53], [-65.0, -29.75], [-65.53, -29.53], [-65.68, -29.18], [-66.03, -29.03], [-66.25, -28.5], [-66.04, -28.0], [-66.25, -27.5], [-66.03, -26.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.297426167261278}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.185336075392658}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.262305619981532, 8.139747873942099, 10.54034333662554, 10.14744766697737, 10.832278696695994]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.829579925537132, 7.380043284098349, 6.728376007080101, 6.934938049316429, 7.520401255289755]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.06074358053191, -4.001467259908722, -4.9923183113245075, -5.494547332297938, -5.462985870597715]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.187687777037354, -4.139311815203541, -5.52706215016309, -6.288912399203355, -6.297426167261278]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.443667705629465, -1.4167501520918928, -1.4556997725363674, -1.5027405698687522, -1.4045373978530453]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5715465905027932, -1.4742230528012998, -1.8739439181100375, -1.9173578433346095, -1.6879393737340218]}}