{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:16.498153", "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_303.5_-26.5"}, "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": 2026010000166}, "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": 57584.512494464}, "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": -26.5}, "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": 303.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "303.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 300.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 305.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -29.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -26.25}, "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": [[[[-58.5, -25.75], [-58.25, -25.85], [-58.0, -25.75], [-57.75, -25.85], [-57.5, -25.75], [-57.25, -25.85], [-57.0, -25.75], [-56.75, -25.85], [-56.5, -25.75], [-55.97, -25.97], [-55.8, -26.38], [-55.5, -26.25], [-54.97, -26.47], [-54.75, -27.0], [-54.96, -27.5], [-54.75, -28.0], [-54.85, -28.25], [-54.82, -28.32], [-54.47, -28.47], [-54.25, -29.0], [-54.47, -29.53], [-55.0, -29.75], [-55.25, -29.65], [-55.5, -29.75], [-56.03, -29.53], [-56.18, -29.18], [-56.25, -29.15], [-56.5, -29.25], [-57.03, -29.03], [-57.25, -28.5], [-57.15, -28.25], [-57.25, -28.0], [-57.15, -27.75], [-57.18, -27.68], [-57.25, -27.65], [-57.5, -27.75], [-57.75, -27.65], [-58.0, -27.75], [-58.5, -27.54], [-59.0, -27.75], [-59.53, -27.53], [-59.75, -27.0], [-59.53, -26.47], [-59.18, -26.32], [-59.03, -25.97], [-58.5, -25.75]]]]}, "2026-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.5, -25.75], [-58.25, -25.85], [-58.0, -25.75], [-57.75, -25.85], [-57.5, -25.75], [-57.25, -25.85], [-57.0, -25.75], [-56.75, -25.85], [-56.5, -25.75], [-55.97, -25.97], [-55.8, -26.38], [-55.5, -26.25], [-54.97, -26.47], [-54.75, -27.0], [-54.96, -27.5], [-54.75, -28.0], [-54.85, -28.25], [-54.82, -28.32], [-54.47, -28.47], [-54.25, -29.0], [-54.47, -29.53], [-55.0, -29.75], [-55.25, -29.65], [-55.5, -29.75], [-56.03, -29.53], [-56.18, -29.18], [-56.25, -29.15], [-56.5, -29.25], [-57.03, -29.03], [-57.25, -28.5], [-57.15, -28.25], [-57.25, -28.0], [-57.15, -27.75], [-57.18, -27.68], [-57.25, -27.65], [-57.5, -27.75], [-57.75, -27.65], [-58.0, -27.75], [-58.5, -27.54], [-59.0, -27.75], [-59.53, -27.53], [-59.75, -27.0], [-59.53, -26.47], [-59.18, -26.32], [-59.03, -25.97], [-58.5, -25.75]]]]}, "2026-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-58.5, -25.75], [-58.25, -25.85], [-58.0, -25.75], [-57.75, -25.85], [-57.5, -25.75], [-57.25, -25.85], [-57.0, -25.75], [-56.75, -25.85], [-56.5, -25.75], [-55.97, -25.97], [-55.8, -26.38], [-55.5, -26.25], [-54.97, -26.47], [-54.75, -27.0], [-54.96, -27.5], [-54.75, -28.0], [-54.85, -28.25], [-54.82, -28.32], [-54.47, -28.47], [-54.25, -29.0], [-54.47, -29.53], [-55.0, -29.75], [-55.25, -29.65], [-55.5, -29.75], [-56.03, -29.53], [-56.18, -29.18], [-56.25, -29.15], [-56.5, -29.25], [-57.03, -29.03], [-57.25, -28.5], [-57.15, -28.25], [-57.25, -28.0], [-57.15, -27.75], [-57.18, -27.68], [-57.25, -27.65], [-57.5, -27.75], [-57.75, -27.65], [-58.0, -27.75], [-58.5, -27.54], [-59.0, -27.75], [-59.53, -27.53], [-59.75, -27.0], [-59.53, -26.47], [-59.18, -26.32], [-59.03, -25.97], [-58.5, -25.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.450332833666494}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.984008758382107}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.996828969319722, 20.95539954049252, 24.326005614749988]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.912437693278036, 19.175323740641318, 22.63353754679366]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.060347027762478, -6.130343196325658, -2.761336051058184]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.450332833666494, -6.3959877425049285, -3.0298027094708573]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-3.030329608924139, -3.1107121778708224, -1.4101450507999929]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.4693386706547282, -3.5341755471289518, -1.547940268686047]}}