{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:21:02.093235", "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": "2019-Dec-21_to_2019-Dec-23_306.0_-25.0"}, "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": 2019120000546}, "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 21 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 23 2019"}, "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": 134678.81225169322}, "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", "Brazil", "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": -25.0}, "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": 306.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "306.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 302.25}, "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": -27.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.03, -22.47], [-57.5, -22.25], [-57.25, -22.35], [-57.0, -22.25], [-56.47, -22.47], [-56.25, -23.0], [-56.35, -23.25], [-56.32, -23.32], [-56.25, -23.35], [-56.18, -23.32], [-56.03, -22.97], [-55.5, -22.75], [-55.25, -22.85], [-55.0, -22.75], [-54.75, -22.85], [-54.5, -22.75], [-53.97, -22.97], [-53.82, -23.32], [-53.75, -23.35], [-53.5, -23.25], [-52.97, -23.47], [-52.82, -23.82], [-52.47, -23.97], [-52.25, -24.5], [-52.35, -24.75], [-52.32, -24.82], [-51.97, -24.97], [-51.75, -25.5], [-51.85, -25.75], [-51.75, -26.0], [-51.97, -26.53], [-52.5, -26.75], [-52.75, -26.65], [-52.82, -26.68], [-52.97, -27.03], [-53.5, -27.25], [-53.75, -27.15], [-53.82, -27.18], [-53.97, -27.53], [-54.5, -27.75], [-55.03, -27.53], [-55.25, -27.0], [-55.15, -26.75], [-55.25, -26.5], [-55.15, -26.25], [-55.18, -26.18], [-55.25, -26.15], [-55.5, -26.25], [-56.03, -26.03], [-56.18, -25.68], [-56.25, -25.65], [-56.5, -25.75], [-56.75, -25.65], [-57.0, -25.75], [-57.53, -25.53], [-57.68, -25.18], [-58.03, -25.03], [-58.25, -24.5], [-58.04, -24.0], [-58.25, -23.5], [-58.15, -23.25], [-58.25, -23.0], [-58.03, -22.47]]]]}, "2019-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.03, -22.47], [-57.5, -22.25], [-57.25, -22.35], [-57.0, -22.25], [-56.47, -22.47], [-56.25, -23.0], [-56.35, -23.25], [-56.32, -23.32], [-56.25, -23.35], [-56.18, -23.32], [-56.03, -22.97], [-55.5, -22.75], [-55.25, -22.85], [-55.0, -22.75], [-54.75, -22.85], [-54.5, -22.75], [-53.97, -22.97], [-53.82, -23.32], [-53.75, -23.35], [-53.5, -23.25], [-52.97, -23.47], [-52.82, -23.82], [-52.47, -23.97], [-52.25, -24.5], [-52.35, -24.75], [-52.32, -24.82], [-51.97, -24.97], [-51.75, -25.5], [-51.85, -25.75], [-51.75, -26.0], [-51.97, -26.53], [-52.5, -26.75], [-52.75, -26.65], [-52.82, -26.68], [-52.97, -27.03], [-53.5, -27.25], [-53.75, -27.15], [-53.82, -27.18], [-53.97, -27.53], [-54.5, -27.75], [-55.03, -27.53], [-55.25, -27.0], [-55.15, -26.75], [-55.25, -26.5], [-55.15, -26.25], [-55.18, -26.18], [-55.25, -26.15], [-55.5, -26.25], [-56.03, -26.03], [-56.18, -25.68], [-56.25, -25.65], [-56.5, -25.75], [-56.75, -25.65], [-57.0, -25.75], [-57.53, -25.53], [-57.68, -25.18], [-58.03, -25.03], [-58.25, -24.5], [-58.04, -24.0], [-58.25, -23.5], [-58.15, -23.25], [-58.25, -23.0], [-58.03, -22.47]]]]}, "2019-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.03, -22.47], [-57.5, -22.25], [-57.25, -22.35], [-57.0, -22.25], [-56.47, -22.47], [-56.25, -23.0], [-56.35, -23.25], [-56.32, -23.32], [-56.25, -23.35], [-56.18, -23.32], [-56.03, -22.97], [-55.5, -22.75], [-55.25, -22.85], [-55.0, -22.75], [-54.75, -22.85], [-54.5, -22.75], [-53.97, -22.97], [-53.82, -23.32], [-53.75, -23.35], [-53.5, -23.25], [-52.97, -23.47], [-52.82, -23.82], [-52.47, -23.97], [-52.25, -24.5], [-52.35, -24.75], [-52.32, -24.82], [-51.97, -24.97], [-51.75, -25.5], [-51.85, -25.75], [-51.75, -26.0], [-51.97, -26.53], [-52.5, -26.75], [-52.75, -26.65], [-52.82, -26.68], [-52.97, -27.03], [-53.5, -27.25], [-53.75, -27.15], [-53.82, -27.18], [-53.97, -27.53], [-54.5, -27.75], [-55.03, -27.53], [-55.25, -27.0], [-55.15, -26.75], [-55.25, -26.5], [-55.15, -26.25], [-55.18, -26.18], [-55.25, -26.15], [-55.5, -26.25], [-56.03, -26.03], [-56.18, -25.68], [-56.25, -25.65], [-56.5, -25.75], [-56.75, -25.65], [-57.0, -25.75], [-57.53, -25.53], [-57.68, -25.18], [-58.03, -25.03], [-58.25, -24.5], [-58.04, -24.0], [-58.25, -23.5], [-58.15, -23.25], [-58.25, -23.0], [-58.03, -22.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.490785361533483}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.1466497532785604}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.06761216852493, 22.293468183210393, 22.796424796743395]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.305001291192752, 19.24455649096734, 20.029876474660682]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.390842313085063, -3.240592246406751, -2.808514700343867]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.311356385477097, -4.490785361533483, -3.855159948415121]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7523334416888066, -1.7299103760001036, -1.507794484653898]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2834959908419745, -2.1812143823208117, -1.793996034679203]}}