{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:23.448814", "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-24_to_2025-Dec-29_291.5_-22.5"}, "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": 2025120000789}, "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 24 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 29 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 62776.617249842544}, "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": ["Bolivia, Plurinational State of", "Chile"]}, "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": -22.5}, "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": 291.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "291.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 290.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 292.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -24.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -21.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-70.25, -23.0], [-70.15, -22.75], [-70.18, -22.68], [-70.53, -22.53], [-70.75, -22.0], [-70.53, -21.47], [-70.18, -21.32], [-70.03, -20.97], [-69.5, -20.75], [-69.25, -20.85], [-69.0, -20.75], [-68.75, -20.85], [-68.5, -20.75], [-68.25, -20.85], [-68.0, -20.75], [-67.75, -20.85], [-67.5, -20.75], [-66.97, -20.97], [-66.75, -21.5], [-66.85, -21.75], [-66.75, -22.0], [-66.97, -22.53], [-67.5, -22.75], [-67.75, -22.65], [-67.82, -22.68], [-67.97, -23.03], [-68.32, -23.18], [-68.35, -23.25], [-68.25, -23.5], [-68.35, -23.75], [-68.25, -24.0], [-68.47, -24.53], [-68.82, -24.68], [-68.97, -25.03], [-69.5, -25.25], [-69.75, -25.15], [-70.0, -25.25], [-70.53, -25.03], [-70.75, -24.5], [-70.53, -23.97], [-70.18, -23.82], [-70.15, -23.75], [-70.25, -23.5], [-70.15, -23.25], [-70.25, -23.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.W.South-America", "S.E.South-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-24T11:30:00.000000000": 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16.174896494547568, 13.291848176898384, 11.88442255655923, 6.820144907633448, 4.651098293728353]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.511739349365257, 12.308649953206384, 3.1362307230631927, 2.2820055643717865, 2.1029513041178802, 3.0600067138672102]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5198871819883568, -2.053548294009744, -2.254152983006365, -3.1306481278291187, -2.9161264285775204, -2.2303357832738206]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.6647452236283016, -2.431092753084215, -3.673174504116389, -4.633796241745813, -3.6969025645537954, -2.2560704773054567]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4827170638374099, -1.7547405160041785, -1.6696133979894825, -2.2424031135823954, -1.8135368213673564, -1.342130035750526]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6099476204363536, -2.1177888590759544, -2.102373132869336, -2.9090203820011906, -2.0826129802336633, -1.3687927238630966]}}