{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:13.197406", "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-08_to_2025-Dec-14_306.5_-25.5"}, "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": 2025120000335}, "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 08 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": 7}, "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": 90448.843023738}, "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", "Paraguay"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": -25.5}, "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": 306.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 305.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 310.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-54.57, -24.43], [-54.75, -24.0], [-54.53, -23.47], [-54.18, -23.32], [-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], [-51.47, -21.97], [-51.32, -22.32], [-51.25, -22.35], [-51.0, -22.25], [-50.75, -22.35], [-50.5, -22.25], [-50.25, -22.35], [-50.0, -22.25], [-49.75, -22.35], [-49.5, -22.25], [-48.97, -22.47], [-48.75, -23.0], [-48.97, -23.53], [-49.32, -23.68], [-49.47, -24.03], [-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], [-52.46, -25.0], [-52.25, -25.5], [-52.47, -26.03], [-53.0, -26.25], [-53.25, -26.15], [-53.5, -26.25], [-53.75, -26.15], [-54.0, -26.25], [-54.25, -26.15], [-54.32, -26.18], [-54.47, -26.53], [-55.0, -26.75], [-55.53, -26.53], [-55.75, -26.0], [-55.54, -25.5], [-55.75, -25.0], [-55.53, -24.47], [-55.0, -24.25], [-54.57, -24.43]], [[-54.32, -24.82], [-54.25, -24.85], [-54.18, -24.82], [-54.13, -24.7], [-54.43, -24.57], [-54.32, -24.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.75, -25.0], [-55.52999999999997, -24.47], [-55.0, -24.25], [-54.47000000000003, -24.47], [-54.31999999999999, -24.82], [-54.25, -24.85], [-54.0, -24.75], [-53.75, -24.85], [-53.5, -24.75], [-52.97000000000003, -24.97], [-52.75, -25.5], [-52.97000000000003, -26.03], [-53.5, -26.25], [-53.75, -26.15], [-54.0, -26.25], [-54.25, -26.15], [-54.31999999999999, -26.18], [-54.47000000000003, -26.53], [-55.0, -26.75], [-55.52999999999997, -26.53], [-55.75, -26.0], [-55.54000000000002, -25.5], [-55.75, -25.0]]]]}, "2025-12-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.75, -25.0], [-55.52999999999997, -24.47], [-55.0, 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duration", "value": -3.263159588513855}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.48909937540691, 21.683163488478897, 21.446284230550134, 22.352626772280075, 20.840255228678473, 21.349940575493747, 22.036656067336764]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.06797307332357, 20.721214548746786, 20.073237355550134, 21.082869466145837, 17.36042938232424, 19.908447519938193, 20.811172739664755]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.3592190574357685, -2.7737014984225135, -3.106428115807838, -2.405974399783089, -3.962329012984581, -3.4628286946270617, -2.81935699616737]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.6216307362952307, 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