{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:50:08.238260", "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": "2012-Apr-07_to_2012-Apr-12_25.5_-30.5"}, "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": 2012040000449}, "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 07 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 779026.3296811115}, "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": ["Botswana", "Lesotho", "Namibia", "South Africa"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Southern-Africa", "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": []}, "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": -30.5}, "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": 25.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -34.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -23.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-04-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.35, -25.25], [15.25, -25.0], [15.47, -24.47], [16.0, -24.25], [16.25, -24.35], [16.5, -24.25], [17.03, -24.47], [17.25, -25.0], [17.15, -25.25], [17.25, -25.5], [17.15, -25.75], [17.18, -25.82], [17.53, -25.97], [17.68, -26.32], [18.03, -26.47], [18.18, -26.82], [18.53, -26.97], [18.68, -27.32], [19.03, -27.47], [19.25, -28.0], [19.15, -28.25], [19.18, -28.32], [19.53, -28.47], [19.75, -29.0], [19.53, -29.53], [19.18, -29.68], [19.15, -29.75], [19.25, -30.0], [19.15, -30.25], [19.2, -30.37], [19.5, -30.25], [19.75, -30.35], [20.0, -30.25], [20.25, -30.35], [20.5, -30.25], [21.03, -30.47], [21.25, -31.0], [21.13, -31.3], [21.53, -31.47], [21.75, -32.0], [21.53, -32.53], [21.18, -32.68], [21.15, -32.75], [21.25, -33.0], [21.03, -33.53], [20.5, -33.75], [20.25, -33.65], [20.18, -33.68], [20.04, -34.0], [20.25, -34.5], [20.03, -35.03], [19.5, -35.25], [18.97, -35.03], [18.82, -34.68], [18.75, -34.65], [18.5, -34.75], [17.97, -34.53], [17.75, -34.0], [17.85, -33.75], [17.75, -33.5], [17.96, -33.0], [17.75, -32.5], [17.85, -32.25], [17.75, -32.0], [17.88, -31.7], [17.47, -31.53], [17.25, -31.0], [17.35, -30.75], [17.32, -30.68], [16.97, -30.53], [16.75, -30.0], [16.85, -29.75], [16.75, -29.5], [16.85, -29.25], [16.82, -29.18], [16.47, -29.03], [16.25, -28.5], [16.35, -28.25], [16.32, -28.18], [16.25, -28.15], [16.0, -28.25], [15.47, -28.03], [15.25, -27.5], [15.47, -26.97], [15.82, -26.82], [15.85, -26.75], [15.82, -26.68], [15.47, -26.53], [15.25, -26.0], [15.35, -25.75], [15.25, -25.5], [15.35, -25.25]]]]}, "2012-04-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.35, -25.25], [15.25, -25.0], [15.47, -24.47], [16.0, -24.25], [16.25, -24.35], [16.5, -24.25], [17.0, -24.46], [17.32, -24.32], [17.47, -23.97], [18.0, -23.75], [18.53, -23.97], [18.68, -24.32], [18.75, -24.35], [19.0, -24.25], [19.25, -24.35], [19.5, -24.25], [19.75, -24.35], [20.0, -24.25], [20.25, -24.35], [20.5, -24.25], [21.03, -24.47], [21.18, -24.82], [21.25, -24.85], [21.5, -24.75], [22.03, -24.97], [22.18, -25.32], [22.53, -25.47], [22.68, -25.82], [23.03, -25.97], [23.18, -26.32], [23.53, -26.47], [23.68, -26.82], [24.03, -26.97], [24.25, -27.5], [24.15, -27.75], [24.18, -27.82], [24.53, -27.97], [24.68, -28.32], [25.03, -28.47], [25.18, -28.82], [25.25, -28.85], [25.5, -28.75], [26.03, -28.97], [26.25, -29.5], [26.15, -29.75], [26.18, -29.82], [26.53, -29.97], [26.75, -30.5], [26.65, -30.75], [26.75, -31.0], [26.53, -31.53], [26.18, -31.68], [26.04, -32.0], [26.25, -32.5], [26.03, -33.03], [25.5, -33.25], [25.25, -33.15], [25.0, -33.25], [24.47, -33.03], [24.32, -32.68], [24.25, -32.65], [24.18, -32.68], [24.03, -33.03], [23.5, -33.25], [23.25, -33.15], [23.18, -33.18], [23.03, -33.53], [22.5, -33.75], [22.25, -33.65], [22.0, -33.75], [21.75, -33.65], [21.68, -33.68], [21.53, -34.03], [21.0, -34.25], [20.47, -34.03], [20.32, -33.68], [20.25, -33.65], [20.18, -33.68], [20.04, -34.0], [20.25, -34.5], [20.03, -35.03], [19.5, -35.25], [18.97, -35.03], [18.82, -34.68], [18.75, -34.65], [18.5, -34.75], [17.97, -34.53], [17.75, -34.0], [17.85, -33.75], [17.75, -33.5], [17.96, -33.0], [17.75, -32.5], [17.85, -32.25], [17.75, -32.0], [17.88, -31.7], [17.47, -31.53], [17.25, -31.0], [17.35, -30.75], [17.32, -30.68], [16.97, -30.53], [16.75, -30.0], [16.85, -29.75], [16.75, -29.5], [16.85, -29.25], [16.82, -29.18], [16.47, -29.03], [16.25, -28.5], [16.35, -28.25], [16.32, -28.18], [16.25, -28.15], [16.0, -28.25], [15.47, -28.03], [15.25, -27.5], [15.47, -26.97], [15.82, -26.82], [15.85, -26.75], [15.82, -26.68], [15.47, -26.53], [15.25, -26.0], [15.35, -25.75], [15.25, -25.5], [15.35, -25.25]], [[20.25, -30.35], [20.38, -30.3], [20.32, -30.18], [19.97, -30.03], [19.75, -29.5], [19.85, -29.25], [19.82, -29.18], [19.7, -29.12], [19.53, -29.53], [19.18, -29.68], [19.15, -29.75], [19.25, -30.0], [19.15, -30.25], [19.2, -30.37], [19.5, -30.25], [19.75, -30.35], [20.0, -30.25], [20.25, -30.35]]]]}, "2012-04-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.35, -25.25], [15.25, -25.0], [15.47, -24.47], [16.0, -24.25], [16.25, -24.35], [16.5, -24.25], [17.0, -24.46], [17.32, -24.32], [17.47, -23.97], [18.0, -23.75], [18.53, -23.97], [18.68, -24.32], [18.75, -24.35], [19.0, -24.25], [19.25, -24.35], [19.5, -24.25], [19.75, -24.35], [20.0, -24.25], [20.25, -24.35], [20.5, -24.25], [21.03, -24.47], [21.18, -24.82], [21.25, -24.85], [21.38, -24.8], [21.25, -24.5], [21.35, -24.25], [21.25, -24.0], [21.47, -23.47], [22.0, -23.25], [22.53, -23.47], [22.68, -23.82], [22.75, -23.85], [23.0, -23.75], [23.53, -23.97], [23.68, -24.32], [23.75, -24.35], [24.0, -24.25], [24.53, -24.47], [24.68, -24.82], [25.03, -24.97], [25.25, -25.5], [25.03, -26.03], [24.68, -26.18], [24.65, -26.25], [24.68, -26.32], [24.75, -26.35], [25.0, -26.25], [25.25, -26.35], [25.5, -26.25], [25.75, -26.35], [26.0, -26.25], [26.25, -26.35], [26.5, -26.25], [27.03, -26.47], [27.18, -26.82], [27.53, -26.97], [27.75, -27.5], [27.65, -27.75], [27.75, -28.0], [27.65, -28.25], [27.68, -28.32], [28.03, -28.47], [28.25, -29.0], [28.47, -28.47], [29.0, -28.25], [29.53, -28.47], [29.68, -28.82], [30.03, -28.97], [30.25, -29.5], [30.03, -30.03], [29.68, -30.18], [29.65, -30.25], [29.75, -30.5], [29.53, -31.03], [29.0, -31.25], [28.75, -31.15], [28.68, -31.18], [28.53, -31.53], [28.18, -31.68], [28.03, -32.03], [27.5, -32.25], [27.0, -32.04], [26.5, -32.25], [26.07, -32.07], [26.25, -32.5], [26.03, -33.03], [25.5, -33.25], [25.25, -33.15], [25.0, -33.25], [24.47, -33.03], [24.32, -32.68], [24.25, -32.65], [24.18, -32.68], [24.03, -33.03], [23.5, -33.25], [23.25, -33.15], [23.18, -33.18], [23.03, -33.53], [22.5, -33.75], [22.25, -33.65], [22.0, -33.75], [21.75, -33.65], [21.68, -33.68], [21.53, -34.03], [21.0, -34.25], [20.47, -34.03], [20.32, -33.68], [20.25, -33.65], [20.18, -33.68], [20.04, -34.0], [20.25, -34.5], [20.03, -35.03], [19.5, -35.25], [18.97, -35.03], [18.82, -34.68], [18.75, -34.65], [18.5, -34.75], [17.97, -34.53], [17.75, -34.0], [17.85, -33.75], [17.75, -33.5], [17.96, -33.0], [17.75, -32.5], [17.85, -32.25], [17.75, -32.0], [17.88, -31.7], [17.47, -31.53], [17.25, -31.0], [17.35, -30.75], [17.32, -30.68], [16.97, -30.53], [16.75, -30.0], [16.85, -29.75], [16.75, -29.5], [16.85, -29.25], [16.82, -29.18], [16.47, -29.03], [16.25, -28.5], [16.35, -28.25], [16.32, -28.18], [16.25, -28.15], [16.0, -28.25], [15.47, -28.03], [15.25, -27.5], [15.47, -26.97], [15.82, -26.82], [15.85, -26.75], [15.82, -26.68], [15.47, -26.53], [15.25, -26.0], [15.35, -25.75], [15.25, -25.5], [15.35, -25.25]], [[28.15, -29.25], [28.2, -29.37], [28.32, -29.32], [28.35, -29.25], [28.25, -29.0], [28.15, -29.25]], [[20.25, -30.35], [20.38, -30.3], [20.32, -30.18], [19.97, -30.03], [19.75, -29.5], [19.85, -29.25], [19.82, -29.18], [19.7, -29.12], [19.53, -29.53], [19.18, -29.68], [19.15, -29.75], [19.25, -30.0], [19.15, -30.25], [19.2, -30.37], [19.5, -30.25], [19.75, -30.35], [20.0, -30.25], [20.25, -30.35]]]]}, "2012-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[16.25, -25.5], [16.47, -24.97], [16.82, -24.82], [16.97, -24.47], [17.32, -24.32], [17.47, -23.97], [18.0, -23.75], [18.53, -23.97], [18.68, -24.32], [18.75, -24.35], [19.0, -24.25], [19.25, -24.35], [19.5, -24.25], [19.75, -24.35], [20.0, -24.25], [20.25, -24.35], [20.5, -24.25], [21.03, -24.47], [21.18, -24.82], [21.25, -24.85], [21.38, -24.8], [21.25, -24.5], [21.35, -24.25], [21.25, -24.0], [21.47, -23.47], [22.0, -23.25], [22.53, -23.47], [22.68, -23.82], [22.75, -23.85], [23.0, -23.75], [23.53, -23.97], [23.68, -24.32], [23.75, -24.35], [24.0, -24.25], [24.53, -24.47], [24.68, -24.82], [25.03, -24.97], [25.25, -25.5], [25.03, -26.03], [24.68, -26.18], [24.65, -26.25], [24.68, -26.32], [24.75, -26.35], [25.0, -26.25], [25.25, -26.35], [25.5, -26.25], [25.75, -26.35], [26.0, -26.25], [26.25, -26.35], [26.5, -26.25], [27.03, -26.47], [27.18, -26.82], [27.53, -26.97], [27.75, -27.5], [27.65, -27.75], [27.75, -28.0], [27.65, -28.25], [27.68, -28.32], [28.03, -28.47], [28.25, -29.0], [28.47, -28.47], [29.0, -28.25], [29.53, -28.47], [29.68, -28.82], [30.03, -28.97], [30.25, -29.5], [30.03, -30.03], [29.68, -30.18], [29.65, -30.25], [29.75, -30.5], [29.53, -31.03], [29.0, -31.25], [28.75, -31.15], [28.68, -31.18], [28.53, -31.53], [28.18, -31.68], [28.03, -32.03], [27.5, -32.25], [27.0, -32.04], [26.5, -32.25], [26.07, -32.07], [26.25, -32.5], [26.03, -33.03], [25.5, -33.25], [25.25, -33.15], [25.0, -33.25], [24.47, -33.03], [24.32, -32.68], [24.25, -32.65], [24.18, -32.68], [24.03, -33.03], [23.5, -33.25], [23.25, -33.15], [23.18, -33.18], [23.03, -33.53], [22.5, -33.75], [22.25, -33.65], [22.0, -33.75], [21.75, -33.65], [21.68, -33.68], [21.53, -34.03], [21.0, -34.25], [20.47, -34.03], [20.25, -33.5], [20.35, -33.25], [20.25, -33.0], [20.47, -32.47], [20.88, -32.3], [20.75, -32.0], [20.96, -31.5], [20.75, -31.0], [20.85, -30.75], [20.82, -30.68], [20.47, -30.53], [20.32, -30.18], [19.97, -30.03], [19.75, -29.5], [19.85, -29.25], [19.82, -29.18], [19.47, -29.03], [19.32, -28.68], [18.97, -28.53], [18.82, -28.18], [18.47, -28.03], [18.32, -27.68], [17.97, -27.53], [17.75, -27.0], [17.85, -26.75], [17.82, -26.68], [17.75, -26.65], [17.5, -26.75], [16.97, -26.53], [16.82, -26.18], [16.47, -26.03], [16.25, -25.5]], [[28.15, -29.25], [28.2, -29.37], [28.32, -29.32], [28.35, -29.25], [28.25, -29.0], [28.15, -29.25]]]]}, "2012-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.47, -24.97], [20.0, -24.75], [20.25, -24.85], [20.5, -24.75], [21.03, -24.97], [21.2, -25.37], [21.32, -25.32], [21.46, -25.0], [21.25, -24.5], [21.35, -24.25], [21.25, -24.0], [21.47, -23.47], [22.0, -23.25], [22.53, -23.47], [22.68, -23.82], [22.75, -23.85], [23.0, -23.75], [23.53, -23.97], [23.68, -24.32], [23.75, -24.35], [24.0, -24.25], [24.53, -24.47], [24.68, -24.82], [25.03, -24.97], [25.25, -25.5], [25.03, -26.03], [24.68, -26.18], [24.65, -26.25], [24.68, -26.32], [24.75, -26.35], [25.0, -26.25], [25.25, -26.35], [25.5, -26.25], [25.75, -26.35], [26.0, -26.25], [26.25, -26.35], [26.5, -26.25], [27.03, -26.47], [27.18, -26.82], [27.53, -26.97], [27.75, -27.5], [27.65, -27.75], [27.75, -28.0], [27.65, -28.25], [27.68, -28.32], [28.03, -28.47], [28.25, -29.0], [28.47, -28.47], [29.0, -28.25], [29.53, -28.47], [29.68, -28.82], [30.03, -28.97], [30.25, -29.5], [30.03, -30.03], [29.68, -30.18], [29.65, -30.25], [29.75, -30.5], [29.53, -31.03], [29.0, -31.25], [28.75, -31.15], [28.68, -31.18], [28.53, -31.53], [28.18, -31.68], [28.03, -32.03], [27.5, -32.25], [27.0, -32.04], [26.5, -32.25], [25.97, -32.03], [25.82, -31.68], [25.75, -31.65], [25.5, -31.75], [25.25, -31.65], [25.0, -31.75], [24.75, -31.65], [24.5, -31.75], [24.2, -31.62], [24.03, -32.03], [23.5, -32.25], [22.97, -32.03], [22.75, -31.5], [22.85, -31.25], [22.75, -31.0], [22.97, -30.47], [23.5, -30.25], [23.8, -30.37], [23.85, -30.25], [23.75, -30.0], [23.96, -29.5], [23.75, -29.0], [23.96, -28.5], [23.82, -28.18], [23.47, -28.03], [23.25, -27.5], [23.38, -27.2], [22.97, -27.03], [22.82, -26.68], [22.47, -26.53], [22.32, -26.18], [22.25, -26.15], [22.18, -26.18], [22.04, -26.5], [22.25, -27.0], [22.07, -27.43], [22.5, -27.25], [23.03, -27.47], [23.25, -28.0], [23.03, -28.53], [22.5, -28.75], [21.97, -28.53], [21.75, -28.0], [21.93, -27.57], [21.5, -27.75], [21.25, -27.65], [21.0, -27.75], [20.47, -27.53], [20.25, -27.0], [20.38, -26.7], [20.25, -26.65], [20.0, -26.75], [19.47, -26.53], [19.25, -26.0], [19.35, -25.75], [19.25, -25.5], [19.47, -24.97]], [[28.15, -29.25], [28.2, -29.37], [28.32, -29.32], [28.35, -29.25], [28.25, -29.0], [28.15, -29.25]]]]}, "2012-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.97, -29.97], [25.5, -29.75], [26.0, -29.96], [26.32, -29.82], [26.47, -29.47], [27.0, -29.25], [27.53, -29.47], [27.68, -29.82], [28.03, -29.97], [28.25, -30.5], [28.15, -30.75], [28.25, -31.0], [28.03, -31.53], [27.5, -31.75], [26.97, -31.53], [26.82, -31.18], [26.75, -31.15], [26.68, -31.18], [26.53, -31.53], [26.0, -31.75], [25.47, -31.53], [25.32, -31.18], [24.97, -31.03], [24.75, -30.5], [24.97, -29.97]]], [[[28.25, -30.0], [28.47, -29.47], [29.0, -29.25], [29.53, -29.47], [29.75, -30.0], [29.53, -30.53], [29.0, -30.75], [28.47, -30.53], [28.25, -30.0]]], [[[25.47, -26.97], [26.0, -26.75], [26.53, -26.97], [26.75, -27.5], [26.65, -27.75], [26.75, -28.0], [26.53, -28.53], [26.18, -28.68], [26.03, -29.03], [25.5, -29.25], [24.97, -29.03], [24.75, -28.5], [24.85, -28.25], [24.75, -28.0], [24.97, -27.47], [25.32, -27.32], [25.47, -26.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.591889573329695}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.971054424153445}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.133935425152686, 13.346612177659267, 12.303687191732706, 13.176621927771237, 13.909311715637614, 12.272377957666606]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [10.167990071813563, 6.912214384576316, 4.266868262461003, 5.144488455381122, 7.217012982358767, 7.960848686480574]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.694459696127748, -6.459284642240464, -6.809277377158807, -5.71390523254122, -3.454862050502572, -3.051023346288512]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.473405179473389, -9.463837744861678, -9.591889573329695, -7.184440831011898, -4.410265509690703, -3.4914119918836377]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6744613813722236, -1.9308102373080953, -2.23296995422072, -2.0891730904621633, -1.4847613756961837, -1.3048878080580681]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.53791161148694, -2.600880745068439, -3.0104895966611096, -2.874323336214733, -2.07498856013235, -1.5811874072939887]}}