{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:38.214712", "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": "2017-Apr-13_to_2017-Apr-15_23.5_-35.5"}, "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": 2017040000394}, "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": "April 13 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 15 2017"}, "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": 68122.37830612638}, "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": ["South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Southern-Ocean", "W.Southern-Africa"]}, "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": -35.5}, "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": 23.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "23.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 21.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -37.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -33.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -33.47], [21.5, -33.25], [22.0, -33.46], [22.5, -33.25], [22.75, -33.35], [23.0, -33.25], [23.25, -33.35], [23.5, -33.25], [23.75, -33.35], [24.0, -33.25], [24.25, -33.35], [24.5, -33.25], [25.03, -33.47], [25.25, -34.0], [25.04, -34.5], [25.18, -34.82], [25.53, -34.97], [25.75, -35.5], [25.65, -35.75], [25.68, -35.82], [26.03, -35.97], [26.25, -36.5], [26.15, -36.75], [26.25, -37.0], [26.03, -37.53], [25.5, -37.75], [25.25, -37.65], [25.0, -37.75], [24.47, -37.53], [24.32, -37.18], [24.25, -37.15], [24.0, -37.25], [23.47, -37.03], [23.32, -36.68], [22.97, -36.53], [22.75, -36.0], [22.85, -35.75], [22.75, -35.5], [22.88, -35.2], [22.75, -35.15], [22.5, -35.25], [22.25, -35.15], [22.0, -35.25], [21.75, -35.15], [21.5, -35.25], [20.97, -35.03], [20.75, -34.5], [20.85, -34.25], [20.75, -34.0], [20.97, -33.47]]]]}, "2017-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -33.47], [21.5, -33.25], [22.0, -33.46], [22.5, -33.25], [22.75, -33.35], [23.0, -33.25], [23.25, -33.35], [23.5, -33.25], [23.75, -33.35], [24.0, -33.25], [24.25, -33.35], [24.5, -33.25], [25.03, -33.47], [25.25, -34.0], [25.04, -34.5], [25.18, -34.82], [25.53, -34.97], [25.75, -35.5], [25.65, -35.75], [25.68, -35.82], [26.03, -35.97], [26.25, -36.5], [26.15, -36.75], [26.25, -37.0], [26.03, -37.53], [25.5, -37.75], [25.25, -37.65], [25.0, -37.75], [24.47, -37.53], [24.32, -37.18], [24.25, -37.15], [24.0, -37.25], [23.47, -37.03], [23.32, -36.68], [22.97, -36.53], [22.75, -36.0], [22.85, -35.75], [22.75, -35.5], [22.88, -35.2], [22.75, -35.15], [22.5, -35.25], [22.25, -35.15], [22.0, -35.25], [21.75, -35.15], [21.5, -35.25], [20.97, -35.03], [20.75, -34.5], [20.85, -34.25], [20.75, -34.0], [20.97, -33.47]]]]}, "2017-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -33.47], [21.5, -33.25], [22.0, -33.46], [22.5, -33.25], [22.75, -33.35], [23.0, -33.25], [23.25, -33.35], [23.5, -33.25], [23.75, -33.35], [24.0, -33.25], [24.25, -33.35], [24.5, -33.25], [25.03, -33.47], [25.25, -34.0], [25.04, -34.5], [25.18, -34.82], [25.53, -34.97], [25.75, -35.5], [25.65, -35.75], [25.68, -35.82], [26.03, -35.97], [26.25, -36.5], [26.15, -36.75], [26.25, -37.0], [26.03, -37.53], [25.5, -37.75], [25.25, -37.65], [25.0, -37.75], [24.47, -37.53], [24.32, -37.18], [24.25, -37.15], [24.0, -37.25], [23.47, -37.03], [23.32, -36.68], [22.97, -36.53], [22.75, -36.0], [22.85, -35.75], [22.75, -35.5], [22.88, -35.2], [22.75, -35.15], [22.5, -35.25], [22.25, -35.15], [22.0, -35.25], [21.75, -35.15], [21.5, -35.25], [20.97, -35.03], [20.75, -34.5], [20.85, -34.25], [20.75, -34.0], [20.97, -33.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.188278338374971}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.6081605695346366}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [16.269660799866983, 14.010323626745219, 16.27868091155699]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.234603998918317, 11.70126590946569, 13.09564267460729]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.904480075073955, -5.1393423037314285, -2.7806593297985263]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.6648962411395587, -6.188278338374971, -4.164097076346934]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.711279873138296, -3.0695627101222387, -1.654853352498951]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2256021261990626, -3.5786136861269737, -1.9644107319623199]}}