{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:33:35.278794", "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": "2022-Dec-29_to_2023-Jan-06_290.0_-22.0"}, "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": 2022120001239}, "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 29 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 9}, "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": 74063.73691161869}, "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": ["Chile"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["S.W.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 Pacific 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": -22.0}, "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": 290.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "290.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 289.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 291.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -26.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -19.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, -19.47], [-70.5, -19.25], [-69.97, -19.47], [-69.75, -20.0], [-69.85, -20.25], [-69.75, -20.5], [-69.97, -21.03], [-70.5, -21.25], [-71.03, -21.03], [-71.25, -20.5], [-71.15, -20.25], [-71.25, -20.0], [-71.03, -19.47]]]]}, "2022-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, -19.47], [-70.5, -19.25], [-70.25, -19.35], [-70.0, -19.25], [-69.47, -19.47], [-69.25, -20.0], [-69.35, -20.25], [-69.25, -20.5], [-69.35, -20.75], [-69.25, -21.0], [-69.35, -21.25], [-69.25, -21.5], [-69.35, -21.75], [-69.25, -22.0], [-69.47, -22.53], [-70.0, -22.75], [-70.53, -22.53], [-70.75, -22.0], [-70.65, -21.75], [-70.75, -21.5], [-70.65, -21.25], [-70.68, -21.18], [-71.03, -21.03], [-71.25, -20.5], [-71.15, -20.25], [-71.25, -20.0], [-71.03, -19.47]]]]}, "2022-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, -19.47], [-70.5, -19.25], [-70.25, -19.35], [-70.0, -19.25], [-69.47, -19.47], [-69.25, -20.0], [-69.35, -20.25], [-69.25, -20.5], [-69.35, -20.75], [-69.32, -20.82], [-68.97, -20.97], [-68.75, -21.5], [-68.87, -21.8], [-68.47, -21.97], [-68.25, -22.5], [-68.47, -23.03], [-68.82, -23.18], [-68.85, -23.25], [-68.75, -23.5], [-68.85, -23.75], [-68.75, -24.0], [-68.85, -24.25], [-68.75, -24.5], [-68.97, -25.03], [-69.37, -25.2], [-69.25, -25.5], [-69.35, -25.75], [-69.25, -26.0], [-69.47, -26.53], [-70.0, -26.75], [-70.53, -26.53], [-70.75, -26.0], [-70.65, -25.75], [-70.75, -25.5], [-70.54, -25.0], [-70.75, -24.5], [-70.53, -23.97], [-70.18, -23.82], [-70.15, -23.75], [-70.25, -23.5], [-70.15, -23.25], [-70.18, -23.18], [-70.53, -23.03], [-70.75, -22.5], [-70.65, -22.25], [-70.75, -22.0], [-70.65, -21.75], [-70.75, -21.5], [-70.65, -21.25], [-70.68, -21.18], [-71.03, -21.03], [-71.25, -20.5], [-71.15, -20.25], [-71.25, -20.0], [-71.03, -19.47]]]]}, "2023-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.25, -20.5], [-71.03, -19.97], [-70.68, -19.82], [-70.53, -19.47], [-70.0, -19.25], [-69.47, -19.47], [-69.25, -20.0], [-69.35, -20.25], [-69.25, -20.5], [-69.35, -20.75], [-69.32, -20.82], [-68.97, -20.97], [-68.75, -21.5], [-68.87, -21.8], [-68.47, -21.97], [-68.25, -22.5], [-68.35, -22.75], [-68.32, -22.82], [-67.97, -22.97], [-67.75, -23.5], [-67.97, -24.03], [-68.32, -24.18], [-68.47, -24.53], [-68.82, -24.68], [-68.97, -25.03], [-69.32, -25.18], [-69.35, -25.25], [-69.25, -25.5], [-69.35, -25.75], [-69.25, -26.0], [-69.47, -26.53], [-70.0, -26.75], [-70.53, -26.53], [-70.75, -26.0], [-70.65, -25.75], [-70.75, -25.5], [-70.65, -25.25], [-70.75, -25.0], [-70.65, -24.75], [-70.75, -24.5], [-70.53, -23.97], [-70.18, -23.82], [-70.15, -23.75], [-70.25, -23.5], [-70.15, -23.25], [-70.18, -23.18], [-70.53, -23.03], [-70.75, -22.5], [-70.65, -22.25], [-70.75, -22.0], [-70.65, -21.75], [-70.75, -21.5], [-70.65, -21.25], [-70.68, -21.18], [-71.03, -21.03], [-71.25, -20.5]]]]}, "2023-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, -19.97], [-70.5, -19.75], [-70.25, -19.85], [-70.0, -19.75], [-69.47, -19.97], [-69.25, -20.5], [-69.35, -20.75], [-69.32, -20.82], [-68.97, -20.97], [-68.75, -21.5], [-68.87, -21.8], [-68.47, -21.97], [-68.25, -22.5], [-68.35, -22.75], [-68.32, -22.82], [-67.97, -22.97], [-67.75, -23.5], [-67.97, -24.03], [-68.32, -24.18], [-68.47, -24.53], [-68.82, -24.68], [-68.97, -25.03], [-69.32, -25.18], [-69.35, -25.25], [-69.25, -25.5], [-69.35, -25.75], [-69.25, -26.0], [-69.47, -26.53], [-70.0, -26.75], [-70.53, -26.53], [-70.75, -26.0], [-70.65, -25.75], [-70.75, -25.5], [-70.65, -25.25], [-70.75, -25.0], [-70.65, -24.75], [-70.68, -24.68], [-71.03, -24.53], [-71.25, -24.0], [-71.04, -23.5], [-71.25, -23.0], [-71.03, -22.47], [-70.68, -22.32], [-70.65, -22.25], [-70.75, -22.0], [-70.65, -21.75], [-70.68, -21.68], [-71.03, -21.53], [-71.25, -21.0], [-71.15, -20.75], [-71.25, -20.5], [-71.03, -19.97]]]]}, "2023-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, -19.97], [-70.5, -19.75], [-69.97, -19.97], [-69.82, -20.32], [-69.47, -20.47], [-69.25, -21.0], [-69.35, -21.25], [-69.25, -21.5], [-69.35, -21.75], [-69.32, -21.82], [-69.25, -21.85], [-69.0, -21.75], [-68.47, -21.97], [-68.25, -22.5], [-68.35, -22.75], [-68.32, -22.82], [-67.97, -22.97], [-67.75, -23.5], [-67.97, -24.03], [-68.32, -24.18], [-68.47, -24.53], [-68.82, -24.68], [-68.97, -25.03], [-69.32, -25.18], [-69.35, -25.25], [-69.25, -25.5], [-69.47, -26.03], [-70.0, -26.25], [-70.53, -26.03], [-70.75, -25.5], [-70.65, -25.25], [-70.75, -25.0], [-70.65, -24.75], [-70.68, -24.68], [-71.03, -24.53], [-71.25, -24.0], [-71.04, -23.5], [-71.25, -23.0], [-71.03, -22.47], [-70.68, -22.32], [-70.65, -22.25], [-70.75, -22.0], [-70.65, -21.75], [-70.68, -21.68], [-71.03, -21.53], [-71.25, -21.0], [-71.15, -20.75], [-71.25, -20.5], [-71.03, -19.97]]]]}, "2023-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-71.03, -19.97], [-70.5, -19.75], [-69.97, -19.97], [-69.82, -20.32], [-69.47, -20.47], [-69.25, -21.0], [-69.35, -21.25], [-69.25, -21.5], [-69.35, -21.75], [-69.32, -21.82], [-69.25, -21.85], [-69.0, -21.75], [-68.47, -21.97], [-68.25, -22.5], [-68.47, -23.03], [-69.0, -23.25], [-68.47, -23.47], [-68.25, -24.0], [-68.47, -24.53], [-69.0, -24.75], [-69.3, -24.62], [-69.47, -25.03], [-70.0, -25.25], [-70.53, -25.03], [-70.68, -24.68], [-71.03, -24.53], [-71.25, -24.0], [-71.04, -23.5], [-71.25, -23.0], [-71.03, -22.47], [-70.68, -22.32], [-70.65, -22.25], [-70.75, -22.0], [-70.65, -21.75], [-70.68, -21.68], [-71.03, -21.53], [-71.25, -21.0], [-71.15, -20.75], [-71.25, -20.5], [-71.03, -19.97]], [[-69.25, -23.15], [-69.5, -23.25], [-69.75, -23.15], [-69.82, -23.18], [-69.96, -23.5], [-69.82, -23.82], [-69.7, -23.88], [-69.53, -23.47], [-69.0, -23.25], [-69.25, -23.15]]]]}, "2023-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-70.53, -25.03], [-70.75, -24.5], [-70.53, -23.97], [-70.0, -23.75], [-69.47, -23.97], [-69.25, -24.5], [-69.47, -25.03], [-70.0, -25.25], [-70.53, -25.03]]], [[[-70.03, -21.97], [-69.5, -21.75], [-69.25, -21.85], [-69.0, -21.75], [-68.47, -21.97], [-68.25, -22.5], [-68.47, -23.03], [-69.0, -23.25], [-69.25, -23.15], [-69.5, -23.25], [-70.03, -23.03], [-70.25, -22.5], [-70.03, -21.97]]], [[[-71.25, -21.0], [-71.03, -20.47], [-70.5, -20.25], [-69.97, -20.47], [-69.75, -21.0], [-69.97, -21.53], [-70.5, -21.75], [-71.03, -21.53], [-71.25, -21.0]]]]}, "2023-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.5, -21.75], [-68.97, -21.97], [-68.75, -22.5], [-68.97, -23.03], [-69.5, -23.25], [-70.03, -23.03], [-70.25, -22.5], [-70.03, -21.97], [-69.5, -21.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.575791381488841}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.6378528139205029}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.08702006923852, 18.152807113281256, 17.97732929109759, 17.241172519770203, 17.21559723060949, 17.240198471878898, 17.68852520399753, 17.91230279234742, 20.825782447759025]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.786987792909144, 16.243468803054327, 14.715106745911896, 12.705553429317376, 12.391631309016418, 12.658921372536554, 12.996482855982265, 14.344213963898085, 20.825782447759025]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.0861034106804368, -1.2535508927057566, -1.6721447572159382, -1.7395847311720962, -1.847552090432636, -1.5788737776074386, -1.403577455632174, -1.6945185629868433, -1.3665263395287184]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.1868126098341918, -1.727491911274285, -2.1338681718985413, -2.280348056946366, -2.575791381488841, -2.2932565342819657, -1.9581257600783601, -1.9773375320297646, -1.3665263395287184]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.48963927112588, -1.7142872003178729, -1.8020763281372136, -1.697944988864149, -1.8040919133065125, -1.5407793640073062, -1.5694574041662375, -1.5525016094563835, -1.1690339511522165]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5737255184587506, -1.9997029314352188, -2.605254245781918, -2.3363084191618495, -2.2704038602422854, -1.8695729483995434, -2.345236763847484, -1.7405759244697534, -1.1690339511522165]}}