{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:37.226618", "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": "2010-Sep-12_to_2010-Sep-14_50.0_-22.5"}, "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": 2010090000590}, "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": "September 12 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 14 2010"}, "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": 87891.72893752989}, "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": ["Madagascar"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Madagascar"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Africa"]}, "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": ["Indian 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": -22.5}, "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": 50.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "50.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 47.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 52.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -25.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -22.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.97, -22.47], [47.5, -22.25], [47.75, -22.35], [48.0, -22.25], [48.25, -22.35], [48.5, -22.25], [48.75, -22.35], [49.0, -22.25], [49.25, -22.35], [49.32, -22.32], [49.47, -21.97], [50.0, -21.75], [50.25, -21.85], [50.5, -21.75], [51.0, -21.96], [51.5, -21.75], [51.75, -21.85], [52.0, -21.75], [52.53, -21.97], [52.75, -22.5], [52.53, -23.03], [52.18, -23.18], [52.03, -23.53], [51.68, -23.68], [51.53, -24.03], [51.18, -24.18], [51.03, -24.53], [50.5, -24.75], [50.25, -24.65], [50.0, -24.75], [49.75, -24.65], [49.68, -24.68], [49.53, -25.03], [49.0, -25.25], [48.75, -25.15], [48.68, -25.18], [48.53, -25.53], [48.0, -25.75], [47.47, -25.53], [47.25, -25.0], [47.35, -24.75], [47.25, -24.5], [47.35, -24.25], [47.32, -24.18], [46.97, -24.03], [46.75, -23.5], [46.85, -23.25], [46.75, -23.0], [46.97, -22.47]]]]}, "2010-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.97, -22.47], [47.5, -22.25], [47.75, -22.35], [48.0, -22.25], [48.25, -22.35], [48.5, -22.25], [48.75, -22.35], [49.0, -22.25], [49.25, -22.35], [49.32, -22.32], [49.47, -21.97], [50.0, -21.75], [50.25, -21.85], [50.5, -21.75], [51.0, -21.96], [51.5, -21.75], [51.75, -21.85], [52.0, -21.75], [52.53, -21.97], [52.75, -22.5], [52.53, -23.03], [52.18, -23.18], [52.03, -23.53], [51.68, -23.68], [51.53, -24.03], [51.18, -24.18], [51.03, -24.53], [50.5, -24.75], [50.25, -24.65], [50.0, -24.75], [49.75, -24.65], [49.68, -24.68], [49.53, -25.03], [49.0, -25.25], [48.75, -25.15], [48.68, -25.18], [48.53, -25.53], [48.0, -25.75], [47.47, -25.53], [47.25, -25.0], [47.35, -24.75], [47.25, -24.5], [47.35, -24.25], [47.32, -24.18], [46.97, -24.03], [46.75, -23.5], [46.85, -23.25], [46.75, -23.0], [46.97, -22.47]]]]}, "2010-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.97, -22.47], [47.5, -22.25], [47.75, -22.35], [48.0, -22.25], [48.25, -22.35], [48.5, -22.25], [48.75, -22.35], [49.0, -22.25], [49.25, -22.35], [49.32, -22.32], [49.47, -21.97], [50.0, -21.75], [50.25, -21.85], [50.5, -21.75], [51.0, -21.96], [51.5, -21.75], [51.75, -21.85], [52.0, -21.75], [52.53, -21.97], [52.75, -22.5], [52.53, -23.03], [52.18, -23.18], [52.03, -23.53], [51.68, -23.68], [51.53, -24.03], [51.18, -24.18], [51.03, -24.53], [50.5, -24.75], [50.25, -24.65], [50.0, -24.75], [49.75, -24.65], [49.68, -24.68], [49.53, -25.03], [49.0, -25.25], [48.75, -25.15], [48.68, -25.18], [48.53, -25.53], [48.0, -25.75], [47.47, -25.53], [47.25, -25.0], [47.35, -24.75], [47.25, -24.5], [47.35, -24.25], [47.32, -24.18], [46.97, -24.03], [46.75, -23.5], [46.85, -23.25], [46.75, -23.0], [46.97, -22.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.3189563702683245}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7220144071435355}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.52994093883831, 20.153125180712664, 20.149879046256274]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [19.27833258487817, 18.958174319073294, 18.97423735060903]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.5025544793364871, -1.8432407743447228, -1.8202479677493963]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.2304777560413527, -2.3189563702683245, -2.243726464700501]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7930593905641719, -2.0783525835220678, -2.005773789296641]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.220163339092783, -2.295773664916719, -2.651870988408231]}}