{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:16.524740", "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-Jan-04_to_2026-Jan-06_300.5_-26.0"}, "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": 2026010000169}, "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": "January 04 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2026"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 50446.23455724612}, "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", "Paraguay"]}, "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": -26.0}, "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": 300.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "300.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 298.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 301.25}, "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": -23.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.53, -24.47], [-61.18, -24.32], [-61.15, -24.25], [-61.25, -24.0], [-61.03, -23.47], [-60.5, -23.25], [-60.25, -23.35], [-60.0, -23.25], [-59.75, -23.35], [-59.5, -23.25], [-58.97, -23.47], [-58.82, -23.82], [-58.47, -23.97], [-58.25, -24.5], [-58.35, -24.75], [-58.25, -25.0], [-58.47, -25.53], [-58.82, -25.68], [-58.85, -25.75], [-58.75, -26.0], [-58.97, -26.53], [-59.5, -26.75], [-59.75, -26.65], [-60.0, -26.75], [-60.53, -26.53], [-60.68, -26.18], [-60.75, -26.15], [-61.0, -26.25], [-61.53, -26.03], [-61.75, -25.5], [-61.65, -25.25], [-61.75, -25.0], [-61.53, -24.47]]]]}, "2026-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.53, -24.47], [-61.18, -24.32], [-61.15, -24.25], [-61.25, -24.0], [-61.03, -23.47], [-60.5, -23.25], [-60.25, -23.35], [-60.0, -23.25], [-59.75, -23.35], [-59.5, -23.25], [-58.97, -23.47], [-58.82, -23.82], [-58.47, -23.97], [-58.25, -24.5], [-58.35, -24.75], [-58.25, -25.0], [-58.47, -25.53], [-58.82, -25.68], [-58.85, -25.75], [-58.75, -26.0], [-58.97, -26.53], [-59.5, -26.75], [-59.75, -26.65], [-60.0, -26.75], [-60.53, -26.53], [-60.68, -26.18], [-60.75, -26.15], [-61.0, -26.25], [-61.53, -26.03], [-61.75, -25.5], [-61.65, -25.25], [-61.75, -25.0], [-61.53, -24.47]]]]}, "2026-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-61.53, -24.47], [-61.18, -24.32], [-61.15, -24.25], [-61.25, -24.0], [-61.03, -23.47], [-60.5, -23.25], [-60.25, -23.35], [-60.0, -23.25], [-59.75, -23.35], [-59.5, -23.25], [-58.97, -23.47], [-58.82, -23.82], [-58.47, -23.97], [-58.25, -24.5], [-58.35, -24.75], [-58.25, -25.0], [-58.47, -25.53], [-58.82, -25.68], [-58.85, -25.75], [-58.75, -26.0], [-58.97, -26.53], [-59.5, -26.75], [-59.75, -26.65], [-60.0, -26.75], [-60.53, -26.53], [-60.68, -26.18], [-60.75, -26.15], [-61.0, -26.25], [-61.53, -26.03], [-61.75, -25.5], [-61.65, -25.25], [-61.75, -25.0], [-61.53, -24.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.505252465840556}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.5707391265406665}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.26443422105575, 22.2876374703867, 24.82082957515007]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.54606399536135, 21.495554860432946, 24.30459874471029]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.125918560762478, -6.076427369603503, -3.5098714492560186]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.211067885097748, -6.505252465840556, -4.476766016466627]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7629547721295913, -2.6244877073057964, -1.4974996905047293]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.221741040736994, -2.870179444466145, -1.7922167728840206]}}