{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:40.410269", "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": "2023-Dec-30_to_2024-Jan-01_307.5_-33.0"}, "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": 2023120000602}, "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 30 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 01 2024"}, "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": 56968.427905216085}, "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", "Uruguay"]}, "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": ["Atlantic Ocean", "Oceano Atl\u00e2ntico"]}, "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": -33.0}, "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": 307.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "307.5\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": 307.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -32.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-55.12, -32.8], [-55.25, -32.5], [-55.03, -31.97], [-54.68, -31.82], [-54.53, -31.47], [-54.0, -31.25], [-53.75, -31.35], [-53.5, -31.25], [-53.25, -31.35], [-53.0, -31.25], [-52.75, -31.35], [-52.5, -31.25], [-51.97, -31.47], [-51.75, -32.0], [-51.85, -32.25], [-51.75, -32.5], [-51.85, -32.75], [-51.75, -33.0], [-51.97, -33.53], [-52.32, -33.68], [-52.47, -34.03], [-53.0, -34.25], [-53.25, -34.15], [-53.32, -34.18], [-53.35, -34.25], [-53.25, -34.5], [-53.47, -35.03], [-54.0, -35.25], [-54.25, -35.15], [-54.5, -35.25], [-55.03, -35.03], [-55.18, -34.68], [-55.53, -34.53], [-55.75, -34.0], [-55.65, -33.75], [-55.75, -33.5], [-55.53, -32.97], [-55.12, -32.8]]]]}}, "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": {"2023-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.75, -33.5], [-55.52999999999997, -32.97], [-55.120000000000005, -32.8], [-55.25, -32.5], [-55.02999999999997, -31.97], [-54.68000000000001, -31.82], [-54.52999999999997, -31.47], [-54.0, -31.25], [-53.75, -31.35], [-53.5, -31.25], [-53.25, -31.35], [-53.0, -31.25], [-52.75, -31.35], [-52.5, -31.25], [-51.97000000000003, -31.47], [-51.75, -32.0], [-51.85000000000002, -32.25], [-51.75, -32.5], [-51.85000000000002, -32.75], [-51.75, -33.0], [-51.97000000000003, -33.53], [-52.31999999999999, -33.68], [-52.47000000000003, -34.03], [-53.0, -34.25], [-53.25, -34.15], [-53.31999999999999, -34.18], [-53.35000000000002, -34.25], [-53.25, -34.5], [-53.47000000000003, -35.03], [-54.0, -35.25], [-54.25, -35.15], [-54.5, -35.25], [-55.02999999999997, -35.03], [-55.18000000000001, -34.68], [-55.52999999999997, -34.53], [-55.75, -34.0], [-55.64999999999998, -33.75], [-55.75, -33.5]]]]}, "2023-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.75, -33.5], [-55.52999999999997, -32.97], [-55.120000000000005, -32.8], [-55.25, -32.5], [-55.02999999999997, -31.97], [-54.68000000000001, -31.82], [-54.52999999999997, -31.47], [-54.0, -31.25], [-53.75, -31.35], [-53.5, -31.25], [-53.25, -31.35], [-53.0, -31.25], [-52.75, -31.35], [-52.5, -31.25], [-51.97000000000003, -31.47], [-51.75, -32.0], [-51.85000000000002, -32.25], [-51.75, -32.5], [-51.85000000000002, -32.75], [-51.75, -33.0], [-51.97000000000003, -33.53], [-52.31999999999999, -33.68], [-52.47000000000003, -34.03], [-53.0, -34.25], [-53.25, -34.15], [-53.31999999999999, -34.18], [-53.35000000000002, -34.25], [-53.25, -34.5], [-53.47000000000003, -35.03], [-54.0, -35.25], [-54.25, -35.15], [-54.5, -35.25], [-55.02999999999997, -35.03], [-55.18000000000001, -34.68], [-55.52999999999997, -34.53], [-55.75, -34.0], [-55.64999999999998, -33.75], [-55.75, -33.5]]]]}, "2024-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-55.75, -33.5], [-55.52999999999997, -32.97], [-55.120000000000005, -32.8], [-55.25, -32.5], [-55.02999999999997, -31.97], [-54.68000000000001, -31.82], [-54.52999999999997, -31.47], [-54.0, -31.25], [-53.75, -31.35], [-53.5, -31.25], [-53.25, -31.35], [-53.0, -31.25], [-52.75, -31.35], [-52.5, -31.25], [-51.97000000000003, -31.47], [-51.75, -32.0], [-51.85000000000002, -32.25], [-51.75, -32.5], [-51.85000000000002, -32.75], [-51.75, -33.0], [-51.97000000000003, -33.53], [-52.31999999999999, -33.68], [-52.47000000000003, -34.03], [-53.0, -34.25], [-53.25, -34.15], [-53.31999999999999, -34.18], [-53.35000000000002, -34.25], [-53.25, -34.5], [-53.47000000000003, -35.03], [-54.0, -35.25], [-54.25, -35.15], [-54.5, -35.25], [-55.02999999999997, -35.03], [-55.18000000000001, -34.68], [-55.52999999999997, -34.53], [-55.75, -34.0], [-55.64999999999998, -33.75], [-55.75, -33.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.01660692192047}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.240655341371029}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.645343298746184, 18.409411235353218, 19.635661796411455]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [15.918713426615454, 17.055751707528714, 18.33767090379291]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.271652672070667, -4.3889293597381505, -3.061383992304268]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.01660692192047, -4.976604121670221, -3.8185324496164412]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.406964560272242, -1.9727914717474697, -1.3761093681438175]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7082094615345302, -2.4829244256275533, -1.5894564054051856]}}