{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:37:16.478926", "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_-33.5"}, "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": 2023120000530}, "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": 104058.37159878493}, "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"]}, "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": ["South Atlantic 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": -33.5}, "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": 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": 303.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 307.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -29.75}, "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": [[[[-56.75, -31.5], [-56.53, -30.97], [-56.18, -30.82], [-56.15, -30.75], [-56.25, -30.5], [-56.03, -29.97], [-55.68, -29.82], [-55.53, -29.47], [-55.0, -29.25], [-54.47, -29.47], [-54.25, -30.0], [-54.35, -30.25], [-54.25, -30.5], [-54.47, -31.03], [-54.82, -31.18], [-54.85, -31.25], [-54.82, -31.32], [-54.75, -31.35], [-54.5, -31.25], [-54.25, -31.35], [-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], [-51.85, -33.25], [-51.75, -33.5], [-51.97, -34.03], [-52.5, -34.25], [-52.75, -34.15], [-52.82, -34.18], [-52.97, -34.53], [-53.32, -34.68], [-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], [-55.68, -34.18], [-56.03, -34.03], [-56.25, -33.5], [-56.15, -33.25], [-56.25, -33.0], [-56.15, -32.75], [-56.25, -32.5], [-56.15, -32.25], [-56.18, -32.18], [-56.53, -32.03], [-56.75, -31.5]]]]}, "2023-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.75, -31.5], [-56.53, -30.97], [-56.18, -30.82], [-56.15, -30.75], [-56.25, -30.5], [-56.03, -29.97], [-55.68, -29.82], [-55.53, -29.47], [-55.0, -29.25], [-54.47, -29.47], [-54.25, -30.0], [-54.35, -30.25], [-54.25, -30.5], [-54.47, -31.03], [-54.82, -31.18], [-54.85, -31.25], [-54.82, -31.32], [-54.75, -31.35], [-54.5, -31.25], [-54.25, -31.35], [-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], [-51.85, -33.25], [-51.75, -33.5], [-51.97, -34.03], [-52.5, -34.25], [-52.75, -34.15], [-52.82, -34.18], [-52.97, -34.53], [-53.32, -34.68], [-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], [-55.68, -34.18], [-56.03, -34.03], [-56.25, -33.5], [-56.15, -33.25], [-56.25, -33.0], [-56.15, -32.75], [-56.25, -32.5], [-56.15, -32.25], [-56.18, -32.18], [-56.53, -32.03], [-56.75, -31.5]]]]}, "2024-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-56.75, -31.5], [-56.53, -30.97], [-56.18, -30.82], [-56.15, -30.75], [-56.25, -30.5], [-56.03, -29.97], [-55.68, -29.82], [-55.53, -29.47], [-55.0, -29.25], [-54.47, -29.47], [-54.25, -30.0], [-54.35, -30.25], [-54.25, -30.5], [-54.47, -31.03], [-54.82, -31.18], [-54.85, -31.25], [-54.82, -31.32], [-54.75, -31.35], [-54.5, -31.25], [-54.25, -31.35], [-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], [-51.85, -33.25], [-51.75, -33.5], [-51.97, -34.03], [-52.5, -34.25], [-52.75, -34.15], [-52.82, -34.18], [-52.97, -34.53], [-53.32, -34.68], [-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], [-55.68, -34.18], [-56.03, -34.03], [-56.25, -33.5], [-56.15, -33.25], [-56.25, -33.0], [-56.15, -32.75], [-56.25, -32.5], [-56.15, -32.25], [-56.18, -32.18], [-56.53, -32.03], [-56.75, -31.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.9889847094868855}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.301421301208596}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.986637353922788, 18.574624443009668, 20.088178680425983]}, "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": [-5.0646002751709505, -4.603466321880104, -3.236197306574735]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.9889847094868855, -5.684701826860703, -4.081218518385356]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.2165461130802067, -2.0320485037806, -1.4137188821595836]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.74202161089693, -2.8388149498467494, -1.6938945878371698]}}