{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:48.926181", "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": "2015-Sep-12_to_2015-Sep-15_46.5_-25.5"}, "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": 2015090000470}, "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 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 15 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 923297.3608644244}, "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", "S.Indian-Ocean"]}, "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", "Mozambique Channel"]}, "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": -25.5}, "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": 46.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "46.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 40.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 55.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -33.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -20.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, -27.5], [40.47, -26.97], [41.0, -26.75], [41.25, -26.85], [41.5, -26.75], [41.75, -26.85], [41.82, -26.82], [41.96, -26.5], [41.82, -26.18], [41.47, -26.03], [41.25, -25.5], [41.35, -25.25], [41.25, -25.0], [41.47, -24.47], [42.0, -24.25], [42.43, -24.43], [42.25, -24.0], [42.35, -23.75], [42.32, -23.68], [41.97, -23.53], [41.75, -23.0], [41.85, -22.75], [41.75, -22.5], [41.85, -22.25], [41.75, -22.0], [41.97, -21.47], [42.32, -21.32], [42.35, -21.25], [42.25, -21.0], [42.47, -20.47], [43.0, -20.25], [43.53, -20.47], [43.75, -21.0], [43.65, -21.25], [43.75, -21.5], [43.65, -21.75], [43.68, -21.82], [43.75, -21.85], [44.0, -21.75], [44.25, -21.85], [44.5, -21.75], [44.75, -21.85], [45.0, -21.75], [45.25, -21.85], [45.5, -21.75], [46.03, -21.97], [46.25, -22.5], [46.15, -22.75], [46.18, -22.82], [46.53, -22.97], [46.68, -23.32], [47.03, -23.47], [47.2, -23.87], [47.32, -23.82], [47.47, -23.47], [48.0, -23.25], [48.25, -23.35], [48.5, -23.25], [49.03, -23.47], [49.25, -24.0], [49.15, -24.25], [49.18, -24.32], [49.53, -24.47], [49.68, -24.82], [50.03, -24.97], [50.18, -25.32], [50.53, -25.47], [50.75, -26.0], [50.65, -26.25], [50.75, -26.5], [50.65, -26.75], [50.68, -26.82], [50.75, -26.85], [51.0, -26.75], [51.53, -26.97], [51.75, -27.5], [51.65, -27.75], [51.75, -28.0], [51.65, -28.25], [51.75, -28.5], [51.65, -28.75], [51.75, -29.0], [51.65, -29.25], [51.75, -29.5], [51.65, -29.75], [51.75, -30.0], [51.65, -30.25], [51.75, -30.5], [51.65, -30.75], [51.75, -31.0], [51.54, -31.5], [51.75, -32.0], [51.65, -32.25], [51.68, -32.32], [52.03, -32.47], [52.25, -33.0], [52.03, -33.53], [51.68, -33.68], [51.53, -34.03], [51.0, -34.25], [50.75, -34.15], [50.5, -34.25], [49.97, -34.03], [49.82, -33.68], [49.75, -33.65], [49.5, -33.75], [49.25, -33.65], [49.0, -33.75], [48.5, -33.54], [48.0, -33.75], [47.47, -33.53], [47.32, -33.18], [46.97, -33.03], [46.82, -32.68], [46.47, -32.53], [46.25, -32.0], [46.47, -31.47], [46.82, -31.32], [46.85, -31.25], [46.75, -31.0], [46.85, -30.75], [46.82, -30.68], [46.47, -30.53], [46.32, -30.18], [45.97, -30.03], [45.82, -29.68], [45.75, -29.65], [45.5, -29.75], [45.25, -29.65], [45.0, -29.75], [44.75, -29.65], [44.5, -29.75], [43.97, -29.53], [43.82, -29.18], [43.75, -29.15], [43.5, -29.25], [43.25, -29.15], [43.18, -29.18], [43.03, -29.53], [42.5, -29.75], [41.97, -29.53], [41.82, -29.18], [41.75, -29.15], [41.5, -29.25], [41.25, -29.15], [41.0, -29.25], [40.75, -29.15], [40.5, -29.25], [39.97, -29.03], [39.75, -28.5], [39.97, -27.97], [40.32, -27.82], [40.35, -27.75], [40.25, -27.5]], [[42.82, -24.82], [42.85, -24.75], [42.82, -24.68], [42.57, -24.57], [42.68, -24.82], [42.75, -24.85], [42.82, -24.82]]]]}, "2015-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, -27.5], [40.47, -26.97], [41.0, -26.75], [41.25, -26.85], [41.5, -26.75], [41.75, -26.85], [41.82, -26.82], [41.96, -26.5], [41.82, -26.18], [41.47, -26.03], [41.25, -25.5], [41.35, -25.25], [41.25, -25.0], [41.47, -24.47], [42.0, -24.25], [42.43, -24.43], [42.25, -24.0], [42.35, -23.75], [42.32, -23.68], [41.97, -23.53], [41.75, -23.0], [41.85, -22.75], [41.75, -22.5], [41.85, -22.25], [41.75, -22.0], [41.97, -21.47], [42.32, -21.32], [42.35, -21.25], [42.25, -21.0], [42.47, -20.47], [43.0, -20.25], [43.53, -20.47], [43.75, -21.0], [43.65, -21.25], [43.75, -21.5], [43.65, -21.75], [43.68, -21.82], [43.75, -21.85], [44.0, -21.75], [44.25, -21.85], [44.5, -21.75], [44.75, -21.85], [45.0, -21.75], [45.25, -21.85], [45.5, -21.75], [46.03, -21.97], [46.25, -22.5], [46.15, -22.75], [46.18, -22.82], [46.53, -22.97], [46.68, -23.32], [46.75, -23.35], [47.0, -23.25], [47.25, -23.35], [47.32, -23.32], [47.35, -23.25], [47.25, -23.0], [47.35, -22.75], [47.25, -22.5], [47.35, -22.25], [47.25, -22.0], [47.47, -21.47], [47.82, -21.32], [47.97, -20.97], [48.5, -20.75], [49.03, -20.97], [49.25, -21.5], [49.15, -21.75], [49.25, -22.0], [49.15, -22.25], [49.25, -22.5], [49.15, -22.75], [49.25, -23.0], [49.15, -23.25], [49.25, -23.5], [49.15, -23.75], [49.25, -24.0], [49.15, -24.25], [49.18, -24.32], [49.25, -24.35], [49.5, -24.25], [49.75, -24.35], [50.0, -24.25], [50.53, -24.47], [50.75, -25.0], [50.57, -25.43], [51.0, -25.25], [51.25, -25.35], [51.5, -25.25], [52.03, -25.47], [52.18, -25.82], [52.53, -25.97], [52.68, -26.32], [53.03, -26.47], [53.18, -26.82], [53.25, -26.85], [53.5, -26.75], [53.8, -26.87], [53.85, -26.75], [53.75, -26.5], [53.97, -25.97], [54.32, -25.82], [54.47, -25.47], [55.0, -25.25], [55.25, -25.35], [55.5, -25.25], [56.03, -25.47], [56.25, -26.0], [56.03, -26.53], [55.68, -26.68], [55.54, -27.0], [55.75, -27.5], [55.65, -27.75], [55.68, -27.82], [56.03, -27.97], [56.25, -28.5], [56.03, -29.03], [55.5, -29.25], [55.25, -29.15], [55.18, -29.18], [55.15, -29.25], [55.25, -29.5], [55.03, -30.03], [54.5, -30.25], [54.25, -30.15], [54.0, -30.25], [53.75, -30.15], [53.5, -30.25], [53.25, -30.15], [53.0, -30.25], [52.75, -30.15], [52.68, -30.18], [52.65, -30.25], [52.75, -30.5], [52.53, -31.03], [52.0, -31.25], [51.7, -31.12], [51.54, -31.5], [51.75, -32.0], [51.65, -32.25], [51.68, -32.32], [52.03, -32.47], [52.25, -33.0], [52.03, -33.53], [51.68, -33.68], [51.53, -34.03], [51.0, -34.25], [50.75, -34.15], [50.5, -34.25], [49.97, -34.03], [49.82, -33.68], [49.75, -33.65], [49.5, -33.75], [49.25, -33.65], [49.0, -33.75], [48.5, -33.54], [48.0, -33.75], [47.47, -33.53], [47.32, -33.18], [46.97, -33.03], [46.82, -32.68], [46.47, -32.53], [46.25, -32.0], [46.47, -31.47], [46.82, -31.32], [46.85, -31.25], [46.75, -31.0], [46.85, -30.75], [46.82, -30.68], [46.47, -30.53], [46.32, -30.18], [45.97, -30.03], [45.82, -29.68], [45.75, -29.65], [45.5, -29.75], [45.25, -29.65], [45.0, -29.75], [44.75, -29.65], [44.5, -29.75], [43.97, -29.53], [43.82, -29.18], [43.75, -29.15], [43.5, -29.25], [43.25, -29.15], [43.18, -29.18], [43.03, -29.53], [42.5, -29.75], [41.97, -29.53], [41.82, -29.18], [41.75, -29.15], [41.5, -29.25], [41.25, -29.15], [41.0, -29.25], [40.75, -29.15], [40.5, -29.25], [39.97, -29.03], [39.75, -28.5], [39.97, -27.97], [40.32, -27.82], [40.35, -27.75], [40.25, -27.5]], [[42.82, -24.82], [42.85, -24.75], [42.82, -24.68], [42.57, -24.57], [42.68, -24.82], [42.75, -24.85], [42.82, -24.82]]]]}, "2015-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.25, -27.5], [40.47, -26.97], [41.0, -26.75], [41.25, -26.85], [41.5, -26.75], [41.75, -26.85], [41.82, -26.82], [41.96, -26.5], [41.82, -26.18], [41.47, -26.03], [41.25, -25.5], [41.35, -25.25], [41.25, -25.0], [41.47, -24.47], [42.0, -24.25], [42.43, -24.43], [42.25, -24.0], [42.35, -23.75], [42.32, -23.68], [41.97, -23.53], [41.75, -23.0], [41.85, -22.75], [41.75, -22.5], [41.85, -22.25], [41.75, -22.0], [41.97, -21.47], [42.32, -21.32], [42.35, -21.25], [42.25, -21.0], [42.47, -20.47], [43.0, -20.25], [43.53, -20.47], [43.75, -21.0], [43.65, -21.25], [43.75, -21.5], [43.65, -21.75], [43.68, -21.82], [43.75, -21.85], [44.0, -21.75], [44.25, -21.85], [44.5, -21.75], [44.75, -21.85], [45.0, -21.75], [45.25, -21.85], [45.5, -21.75], [46.03, -21.97], [46.25, -22.5], [46.15, -22.75], [46.18, -22.82], [46.53, -22.97], [46.68, -23.32], [46.75, -23.35], [47.0, -23.25], [47.25, -23.35], [47.32, -23.32], [47.35, -23.25], [47.25, -23.0], [47.35, -22.75], [47.25, -22.5], [47.35, -22.25], [47.25, -22.0], [47.47, -21.47], [47.82, -21.32], [47.97, -20.97], [48.5, -20.75], [49.03, -20.97], [49.25, -21.5], [49.15, -21.75], [49.25, -22.0], [49.15, -22.25], [49.25, -22.5], [49.15, -22.75], [49.25, -23.0], [49.15, -23.25], [49.25, -23.5], [49.15, -23.75], [49.25, -24.0], [49.15, -24.25], [49.18, -24.32], [49.25, -24.35], [49.5, -24.25], [49.75, -24.35], [50.0, -24.25], [50.53, -24.47], [50.75, -25.0], [50.57, -25.43], [51.0, -25.25], [51.25, -25.35], [51.5, -25.25], [52.03, -25.47], [52.18, -25.82], [52.53, -25.97], [52.68, -26.32], [53.03, -26.47], [53.18, -26.82], [53.25, -26.85], [53.5, -26.75], [53.8, -26.87], [53.85, -26.75], [53.75, -26.5], [53.97, -25.97], [54.32, -25.82], [54.47, -25.47], [55.0, -25.25], [55.25, -25.35], [55.5, -25.25], [56.03, -25.47], [56.25, -26.0], [56.03, -26.53], [55.68, -26.68], [55.54, -27.0], [55.75, -27.5], [55.65, -27.75], [55.68, -27.82], [56.03, -27.97], [56.25, -28.5], [56.03, -29.03], [55.5, -29.25], [55.25, -29.15], [55.18, -29.18], [55.15, -29.25], [55.25, -29.5], [55.03, -30.03], [54.5, -30.25], [54.25, -30.15], [54.0, -30.25], [53.75, -30.15], [53.5, -30.25], [53.25, -30.15], [53.0, -30.25], [52.75, -30.15], [52.68, -30.18], [52.65, -30.25], [52.75, -30.5], [52.53, -31.03], [52.0, -31.25], [51.7, -31.12], [51.54, -31.5], [51.75, -32.0], [51.65, -32.25], [51.68, -32.32], [52.03, -32.47], [52.25, -33.0], [52.03, -33.53], [51.68, -33.68], [51.53, -34.03], [51.0, -34.25], [50.75, -34.15], [50.5, -34.25], [49.97, -34.03], [49.82, -33.68], [49.75, -33.65], [49.5, -33.75], [49.25, -33.65], [49.0, -33.75], [48.5, -33.54], [48.0, -33.75], [47.47, -33.53], [47.32, -33.18], [46.97, -33.03], [46.82, -32.68], [46.47, -32.53], [46.25, -32.0], [46.47, -31.47], [46.82, -31.32], [46.85, -31.25], [46.75, -31.0], [46.85, -30.75], [46.82, -30.68], [46.47, -30.53], [46.32, -30.18], [45.97, -30.03], [45.82, -29.68], [45.75, -29.65], [45.5, -29.75], [45.25, -29.65], [45.0, -29.75], [44.75, -29.65], [44.5, -29.75], [43.97, -29.53], [43.82, -29.18], [43.75, -29.15], [43.5, -29.25], [43.25, -29.15], [43.18, -29.18], [43.03, -29.53], [42.5, -29.75], [41.97, -29.53], [41.82, -29.18], [41.75, -29.15], [41.5, -29.25], [41.25, -29.15], [41.0, -29.25], [40.75, -29.15], [40.5, -29.25], [39.97, -29.03], [39.75, -28.5], [39.97, -27.97], [40.32, -27.82], [40.35, -27.75], [40.25, -27.5]], [[42.82, -24.82], [42.85, -24.75], [42.82, -24.68], [42.57, -24.57], [42.68, -24.82], [42.75, -24.85], [42.82, -24.82]]]]}, "2015-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.32, -24.32], [46.35, -24.25], [46.25, -24.0], [46.47, -23.47], [47.0, -23.25], [47.25, -23.35], [47.32, -23.32], [47.35, -23.25], [47.25, -23.0], [47.35, -22.75], [47.25, -22.5], [47.35, -22.25], [47.25, -22.0], [47.47, -21.47], [47.82, -21.32], [47.97, -20.97], [48.5, -20.75], [49.03, -20.97], [49.25, -21.5], [49.15, -21.75], [49.25, -22.0], [49.15, -22.25], [49.25, -22.5], [49.15, -22.75], [49.25, -23.0], [49.15, -23.25], [49.25, -23.5], [49.15, -23.75], [49.25, -24.0], [49.15, -24.25], [49.18, -24.32], [49.25, -24.35], [49.5, -24.25], [49.75, -24.35], [50.0, -24.25], [50.53, -24.47], [50.75, -25.0], [50.57, -25.43], [51.0, -25.25], [51.25, -25.35], [51.5, -25.25], [52.03, -25.47], [52.18, -25.82], [52.53, -25.97], [52.68, -26.32], [53.03, -26.47], [53.18, -26.82], [53.25, -26.85], [53.5, -26.75], [53.8, -26.87], [53.85, -26.75], [53.75, -26.5], [53.97, -25.97], [54.32, -25.82], [54.47, -25.47], [55.0, -25.25], [55.25, -25.35], [55.5, -25.25], [56.03, -25.47], [56.25, -26.0], [56.03, -26.53], [55.68, -26.68], [55.54, -27.0], [55.75, -27.5], [55.65, -27.75], [55.68, -27.82], [56.03, -27.97], [56.25, -28.5], [56.03, -29.03], [55.5, -29.25], [55.25, -29.15], [55.18, -29.18], [55.15, -29.25], [55.25, -29.5], [55.03, -30.03], [54.5, -30.25], [54.25, -30.15], [54.0, -30.25], [53.75, -30.15], [53.5, -30.25], [53.25, -30.15], [53.0, -30.25], [52.75, -30.15], [52.68, -30.18], [52.65, -30.25], [52.75, -30.5], [52.53, -31.03], [52.0, -31.25], [51.47, -31.03], [51.32, -30.68], [50.97, -30.53], [50.82, -30.18], [50.75, -30.15], [50.5, -30.25], [50.25, -30.15], [50.0, -30.25], [49.47, -30.03], [49.32, -29.68], [48.97, -29.53], [48.75, -29.0], [48.97, -28.47], [49.32, -28.32], [49.35, -28.25], [49.25, -28.0], [49.47, -27.47], [49.82, -27.32], [49.97, -26.97], [50.32, -26.82], [50.35, -26.75], [50.25, -26.5], [50.35, -26.25], [50.25, -26.0], [50.43, -25.57], [50.0, -25.75], [49.75, -25.65], [49.68, -25.68], [49.53, -26.03], [49.0, -26.25], [48.47, -26.03], [48.32, -25.68], [48.25, -25.65], [48.0, -25.75], [47.5, -25.54], [47.18, -25.68], [47.03, -26.03], [46.5, -26.25], [45.97, -26.03], [45.75, -25.5], [45.85, -25.25], [45.75, -25.0], [45.97, -24.47], [46.32, -24.32]]], [[[42.5, -21.75], [43.03, -21.97], [43.25, -22.5], [43.15, -22.75], [43.25, -23.0], [43.03, -23.53], [42.5, -23.75], [41.97, -23.53], [41.75, -23.0], [41.85, -22.75], [41.75, -22.5], [41.97, -21.97], [42.5, -21.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.8930517712462915}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.712982842534646}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [17.57292997002901, 17.507924614737192, 17.50209427877286, 17.918303180878183]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.432068641926492, 11.073557207279862, 12.93362713039295, 13.190330264508361]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.849840161984215, -2.7732492066382397, -2.720584315675913, -2.1053377122897077]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.156999721371051, -6.8930517712462915, -5.461959795319274, -3.4662980183206287]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.14311395825441, -2.0735082525193915, -1.9711367554843544, -1.5963396468456446]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.9245253595997545, -3.508493764815174, -2.581972552057666, -1.8826267339803509]}}