{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:02:43.097819", "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-Apr-13_to_2015-Apr-22_25.0_-13.0"}, "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": 2015040000561}, "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 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 22 2015"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 10}, "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": 411171.6328663439}, "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": ["Angola", "Congo DRC", "Zambia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "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": -13.0}, "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": 25.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 19.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": -16.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": -7.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-04-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -13.97], [22.32, -13.82], [22.47, -13.47], [22.82, -13.32], [22.88, -13.2], [22.47, -13.03], [22.25, -12.5], [22.35, -12.25], [22.25, -12.0], [22.47, -11.47], [22.82, -11.32], [22.85, -11.25], [22.75, -11.0], [22.85, -10.75], [22.75, -10.5], [22.97, -9.97], [23.32, -9.82], [23.47, -9.47], [23.82, -9.32], [23.96, -9.0], [23.75, -8.5], [23.97, -7.97], [24.5, -7.75], [25.03, -7.97], [25.18, -8.32], [25.25, -8.35], [25.5, -8.25], [26.03, -8.47], [26.25, -9.0], [26.15, -9.25], [26.2, -9.37], [26.5, -9.25], [27.03, -9.47], [27.25, -10.0], [27.03, -10.53], [26.63, -10.7], [26.75, -11.0], [26.65, -11.25], [26.68, -11.32], [26.75, -11.35], [27.0, -11.25], [27.25, -11.35], [27.5, -11.25], [28.0, -11.46], [28.5, -11.25], [29.03, -11.47], [29.18, -11.82], [29.53, -11.97], [29.75, -12.5], [29.53, -13.03], [29.13, -13.2], [29.25, -13.5], [29.03, -14.03], [28.5, -14.25], [28.25, -14.15], [28.0, -14.25], [27.75, -14.15], [27.5, -14.25], [27.25, -14.15], [27.0, -14.25], [26.47, -14.03], [26.32, -13.68], [26.25, -13.65], [26.0, -13.75], [25.75, -13.65], [25.68, -13.68], [25.53, -14.03], [25.0, -14.25], [24.75, -14.15], [24.68, -14.18], [24.65, -14.25], [24.75, -14.5], [24.53, -15.03], [24.18, -15.18], [24.15, -15.25], [24.25, -15.5], [24.15, -15.75], [24.25, -16.0], [24.03, -16.53], [23.5, -16.75], [23.25, -16.65], [23.0, -16.75], [22.47, -16.53], [22.25, -16.0], [22.38, -15.7], [21.97, -15.53], [21.75, -15.0], [21.85, -14.75], [21.75, -14.5], [21.97, -13.97]]]]}, "2015-04-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -13.97], [22.32, -13.82], [22.47, -13.47], [22.82, -13.32], [22.85, -13.25], [22.82, -13.18], [22.47, -13.03], [22.25, -12.5], [22.35, -12.25], [22.25, -12.0], [22.47, -11.47], [22.82, -11.32], [22.85, -11.25], [22.75, -11.0], [22.85, -10.75], [22.75, -10.5], [22.97, -9.97], [23.32, -9.82], [23.47, -9.47], [23.82, -9.32], [23.96, -9.0], [23.75, -8.5], [23.97, -7.97], [24.5, -7.75], [25.03, -7.97], [25.18, -8.32], [25.25, -8.35], [25.5, -8.25], [26.03, -8.47], [26.25, -9.0], [26.15, -9.25], [26.2, -9.37], [26.5, -9.25], [27.03, -9.47], [27.25, -10.0], [27.03, -10.53], [26.63, -10.7], [26.75, -11.0], [26.65, -11.25], [26.68, -11.32], [26.75, -11.35], [27.0, -11.25], [27.25, -11.35], [27.5, -11.25], [28.0, -11.46], [28.5, -11.25], [29.03, -11.47], [29.18, -11.82], [29.53, -11.97], [29.75, -12.5], [29.53, -13.03], [29.13, -13.2], [29.25, -13.5], [29.03, -14.03], [28.5, -14.25], [28.25, -14.15], [28.18, -14.18], [28.03, -14.53], [27.5, -14.75], [27.25, -14.65], [27.0, -14.75], [26.75, -14.65], [26.5, -14.75], [26.25, -14.65], [26.0, -14.75], [25.75, -14.65], [25.5, -14.75], [25.25, -14.65], [25.0, -14.75], [24.75, -14.65], [24.68, -14.68], [24.53, -15.03], [24.18, -15.18], [24.15, -15.25], [24.25, -15.5], [24.15, -15.75], [24.25, -16.0], [24.03, -16.53], [23.5, -16.75], [23.25, -16.65], [23.0, -16.75], [22.47, -16.53], [22.25, -16.0], [22.38, -15.7], [21.97, -15.53], [21.75, -15.0], [21.85, -14.75], [21.75, -14.5], [21.97, -13.97]]]]}, "2015-04-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[21.97, -13.97], [22.32, -13.82], [22.47, -13.47], [22.82, -13.32], [22.85, -13.25], [22.82, -13.18], [22.47, -13.03], [22.25, -12.5], [22.35, -12.25], [22.25, -12.0], [22.47, -11.47], [22.82, -11.32], [22.85, -11.25], [22.75, -11.0], [22.85, -10.75], [22.75, -10.5], [22.97, -9.97], [23.32, -9.82], [23.47, -9.47], [23.82, -9.32], [23.96, -9.0], [23.82, -8.68], [23.47, -8.53], [23.25, -8.0], [23.47, -7.47], [24.0, -7.25], [24.53, -7.47], [24.68, -7.82], [25.0, -7.96], [25.5, -7.75], [25.75, -7.85], [26.0, -7.75], [26.53, -7.97], [26.75, -8.5], [26.65, -8.75], [26.75, -9.0], [26.65, -9.25], [26.68, -9.32], [27.03, -9.47], [27.25, -10.0], [27.03, -10.53], [26.63, -10.7], [26.75, -11.0], [26.65, -11.25], [26.68, -11.32], [26.75, -11.35], [27.0, -11.25], [27.25, -11.35], [27.5, -11.25], [28.0, -11.46], [28.5, -11.25], [29.03, -11.47], [29.18, -11.82], [29.53, -11.97], [29.75, -12.5], [29.53, -13.03], [29.13, -13.2], [29.25, -13.5], [29.03, -14.03], [28.5, -14.25], [28.25, -14.15], [28.18, -14.18], [28.03, -14.53], [27.5, -14.75], [27.25, -14.65], [27.0, -14.75], [26.75, -14.65], [26.5, -14.75], [26.25, -14.65], [26.0, -14.75], [25.75, -14.65], [25.5, -14.75], [25.25, -14.65], [25.0, -14.75], [24.75, -14.65], [24.68, -14.68], [24.53, -15.03], [24.18, -15.18], [24.15, -15.25], [24.25, -15.5], [24.15, -15.75], [24.25, -16.0], [24.03, -16.53], [23.5, -16.75], [23.25, -16.65], [23.0, -16.75], [22.47, -16.53], [22.25, -16.0], [22.38, -15.7], [21.97, -15.53], [21.75, -15.0], [21.85, -14.75], [21.75, -14.5], [21.97, -13.97]]]]}, "2015-04-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.97, -11.53], [20.75, -11.0], [20.97, -10.47], [21.5, -10.25], [21.8, -10.37], [21.96, -10.0], [21.75, -9.5], [21.85, -9.25], [21.75, -9.0], [21.97, -8.47], [22.32, -8.32], [22.47, -7.97], [23.0, -7.75], [23.3, -7.87], [23.47, -7.47], [24.0, -7.25], [24.53, -7.47], [24.68, -7.82], [25.0, -7.96], [25.5, -7.75], [25.75, -7.85], [26.0, -7.75], [26.53, -7.97], [26.75, -8.5], [26.65, -8.75], [26.75, -9.0], [26.65, -9.25], [26.75, -9.5], [26.65, -9.75], [26.75, -10.0], [26.54, -10.5], [26.75, -11.0], [26.53, -11.53], [26.18, -11.68], [26.15, -11.75], [26.18, -11.82], [26.53, -11.97], [26.68, -12.32], [26.75, -12.35], [27.0, -12.25], [27.53, -12.47], [27.68, -12.82], [27.75, -12.85], [28.0, -12.75], [28.53, -12.97], [28.75, -13.5], [28.53, -14.03], [28.18, -14.18], [28.03, -14.53], [27.5, -14.75], [27.25, -14.65], [27.0, -14.75], [26.75, -14.65], [26.5, -14.75], [26.25, -14.65], [26.0, -14.75], [25.75, -14.65], [25.5, -14.75], [25.25, -14.65], [25.0, -14.75], [24.75, -14.65], [24.68, -14.68], [24.53, -15.03], [24.0, -15.25], [23.75, -15.15], [23.5, -15.25], [22.97, -15.03], [22.75, -14.5], [22.85, -14.25], [22.75, -14.0], [22.85, -13.75], [22.75, -13.5], [22.85, -13.25], [22.75, -13.0], [22.85, -12.75], [22.75, -12.5], [22.85, -12.25], [22.8, -12.12], [22.5, -12.25], [21.97, -12.03], [21.8, -11.62], [21.5, -11.75], [20.97, -11.53]]]]}, "2015-04-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.25, -10.5], [20.47, -9.97], [20.82, -9.82], [20.97, -9.47], [21.5, -9.25], [21.75, -9.35], [21.82, -9.32], [21.85, -9.25], [21.75, -9.0], [21.97, -8.47], [22.32, -8.32], [22.47, -7.97], [23.0, -7.75], [23.3, -7.87], [23.47, -7.47], [24.0, -7.25], [24.53, -7.47], [24.68, -7.82], [25.0, -7.96], [25.5, -7.75], [25.75, -7.85], [26.0, -7.75], [26.53, -7.97], [26.75, -8.5], [26.65, -8.75], [26.75, -9.0], [26.65, -9.25], [26.75, -9.5], [26.65, -9.75], [26.75, -10.0], [26.54, -10.5], [26.75, -11.0], [26.53, -11.53], [26.18, -11.68], [26.15, -11.75], [26.18, -11.82], [26.53, -11.97], [26.68, -12.32], [26.75, -12.35], [27.0, -12.25], [27.53, -12.47], [27.68, -12.82], [28.03, -12.97], [28.25, -13.5], [28.03, -14.03], [27.5, -14.25], [27.0, -14.04], [26.68, -14.18], [26.53, -14.53], [26.0, -14.75], [25.47, -14.53], [25.32, -14.18], [25.25, -14.15], [25.0, -14.25], [24.75, -14.15], [24.5, -14.25], [23.97, -14.03], [23.75, -13.5], [23.85, -13.25], [23.82, -13.18], [23.75, -13.15], [23.5, -13.25], [23.25, -13.15], [23.0, -13.25], [22.47, -13.03], [22.32, -12.68], [21.97, -12.53], [21.82, -12.18], [21.47, -12.03], [21.32, -11.68], [20.97, -11.53], [20.82, -11.18], [20.47, -11.03], [20.25, -10.5]]]]}, "2015-04-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.25, -10.5], [20.47, -9.97], [20.82, -9.82], [20.97, -9.47], [21.5, -9.25], [21.75, -9.35], [21.82, -9.32], [21.85, -9.25], [21.75, -9.0], [21.97, -8.47], [22.32, -8.32], [22.47, -7.97], [23.0, -7.75], [23.53, -7.97], [23.7, -8.37], [24.0, -8.25], [24.25, -8.35], [24.5, -8.25], [24.75, -8.35], [25.0, -8.25], [25.25, -8.35], [25.5, -8.25], [25.75, -8.35], [26.0, -8.25], [26.53, -8.47], [26.75, -9.0], [26.53, -9.53], [26.18, -9.68], [26.04, -10.0], [26.18, -10.32], [26.53, -10.47], [26.75, -11.0], [26.53, -11.53], [26.18, -11.68], [26.15, -11.75], [26.18, -11.82], [26.53, -11.97], [26.68, -12.32], [26.75, -12.35], [27.0, -12.25], [27.53, -12.47], [27.68, -12.82], [28.03, -12.97], [28.25, -13.5], [28.03, -14.03], [27.5, -14.25], [27.0, -14.04], [26.5, -14.25], [26.0, -14.04], [25.5, -14.25], [25.25, -14.15], [25.18, -14.18], [25.03, -14.53], [24.68, -14.68], [24.53, -15.03], [24.0, -15.25], [23.47, -15.03], [23.25, -14.5], [23.35, -14.25], [23.25, -14.0], [23.35, -13.75], [23.32, -13.68], [23.25, -13.65], [23.0, -13.75], [22.47, -13.53], [22.32, -13.18], [21.97, -13.03], [21.75, -12.5], [21.85, -12.25], [21.82, -12.18], [21.47, -12.03], [21.32, -11.68], [20.97, -11.53], [20.82, -11.18], [20.47, -11.03], [20.25, -10.5]]]]}, "2015-04-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.25, -10.5], [20.47, -9.97], [20.82, -9.82], [20.97, -9.47], [21.5, -9.25], [21.75, -9.35], [22.0, -9.25], [22.53, -9.47], [22.75, -10.0], [22.65, -10.25], [22.68, -10.32], [22.75, -10.35], [23.0, -10.25], [23.25, -10.35], [23.5, -10.25], [23.75, -10.35], [24.0, -10.25], [24.25, -10.35], [24.5, -10.25], [25.03, -10.47], [25.25, -11.0], [25.15, -11.25], [25.25, -11.5], [25.15, -11.75], [25.18, -11.82], [25.25, -11.85], [25.5, -11.75], [26.03, -11.97], [26.25, -12.5], [26.15, -12.75], [26.25, -13.0], [26.15, -13.25], [26.25, -13.5], [26.03, -14.03], [25.5, -14.25], [25.25, -14.15], [25.18, -14.18], [25.03, -14.53], [24.68, -14.68], [24.53, -15.03], [24.0, -15.25], [23.47, -15.03], [23.25, -14.5], [23.35, -14.25], [23.25, -14.0], [23.35, -13.75], [23.32, -13.68], [23.25, -13.65], [23.0, -13.75], [22.47, -13.53], [22.32, -13.18], [22.25, -13.15], [22.0, -13.25], [21.47, -13.03], [21.32, -12.68], [20.97, -12.53], [20.75, -12.0], [20.96, -11.5], [20.82, -11.18], [20.47, -11.03], [20.25, -10.5]]]]}, "2015-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -13.0], [19.47, -12.47], [20.0, -12.25], [20.25, -12.35], [20.32, -12.32], [20.47, -11.97], [20.82, -11.82], [20.97, -11.47], [21.32, -11.32], [21.46, -11.0], [21.32, -10.68], [20.97, -10.53], [20.75, -10.0], [20.97, -9.47], [21.5, -9.25], [21.75, -9.35], [22.0, -9.25], [22.53, -9.47], [22.75, -10.0], [22.65, -10.25], [22.7, -10.37], [23.0, -10.25], [23.25, -10.35], [23.5, -10.25], [23.75, -10.35], [24.0, -10.25], [24.25, -10.35], [24.5, -10.25], [25.03, -10.47], [25.25, -11.0], [25.15, -11.25], [25.25, -11.5], [25.03, -12.03], [24.68, -12.18], [24.65, -12.25], [24.7, -12.37], [25.0, -12.25], [25.53, -12.47], [25.68, -12.82], [26.03, -12.97], [26.25, -13.5], [26.03, -14.03], [25.5, -14.25], [25.25, -14.15], [25.18, -14.18], [25.03, -14.53], [24.68, -14.68], [24.53, -15.03], [24.0, -15.25], [23.47, -15.03], [23.25, -14.5], [23.35, -14.25], [23.25, -14.0], [23.35, -13.75], [23.32, -13.68], [23.25, -13.65], [23.0, -13.75], [22.47, -13.53], [22.32, -13.18], [22.25, -13.15], [22.0, -13.25], [21.57, -13.07], [21.75, -13.5], [21.65, -13.75], [21.75, -14.0], [21.53, -14.53], [21.0, -14.75], [20.47, -14.53], [20.32, -14.18], [19.97, -14.03], [19.82, -13.68], [19.47, -13.53], [19.25, -13.0]]]]}, "2015-04-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -13.0], [19.47, -12.47], [20.0, -12.25], [20.25, -12.35], [20.32, -12.32], [20.47, -11.97], [20.82, -11.82], [20.97, -11.47], [21.32, -11.32], [21.46, -11.0], [21.25, -10.5], [21.35, -10.25], [21.25, -10.0], [21.47, -9.47], [22.0, -9.25], [22.53, -9.47], [22.75, -10.0], [22.65, -10.25], [22.7, -10.37], [23.0, -10.25], [23.25, -10.35], [23.5, -10.25], [24.03, -10.47], [24.25, -11.0], [24.15, -11.25], [24.25, -11.5], [24.03, -12.03], [23.68, -12.18], [23.65, -12.25], [23.75, -12.5], [23.53, -13.03], [23.0, -13.25], [22.75, -13.15], [22.5, -13.25], [22.25, -13.15], [22.0, -13.25], [21.57, -13.07], [21.75, -13.5], [21.65, -13.75], [21.75, -14.0], [21.53, -14.53], [21.0, -14.75], [20.47, -14.53], [20.32, -14.18], [19.97, -14.03], [19.82, -13.68], [19.47, -13.53], [19.25, -13.0]]]]}, "2015-04-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[19.25, -13.0], [19.47, -12.47], [20.0, -12.25], [20.25, -12.35], [20.32, -12.32], [20.47, -11.97], [21.0, -11.75], [21.53, -11.97], [21.75, -12.5], [21.54, -13.0], [21.75, -13.5], [21.65, -13.75], [21.75, -14.0], [21.53, -14.53], [21.0, -14.75], [20.47, -14.53], [20.32, -14.18], [19.97, -14.03], [19.82, -13.68], [19.47, -13.53], [19.25, -13.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.836586957299687}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -1.7139881203568248}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.94728644065566, 19.232958682263586, 19.767310327970733, 20.420783953540763, 20.327938428046195, 20.646480030822715, 20.60136845932533, 20.47676117861249, 20.870874032226368, 20.038670676750826]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.997313222570426, 17.055541895996896, 17.547750391064312, 18.74756675096853, 18.509681485866793, 18.992120247100104, 19.223104668461986, 19.28815868978552, 19.54271453246139, 19.58900446181798]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.6272821910549633, -2.290784778783644, -1.9329067981534673, -1.5300288579859378, -1.727291492117959, -1.4418101104111718, -1.3966974566669486, -1.5382465294305916, -1.3480092537183954, -1.3665604281218293]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.042837856193387, -3.836586957299687, -2.8421759978159002, -2.228341533316325, -2.5855752562763996, -2.0523016111075094, -2.297265734442533, -2.53143271647167, -1.6538667530523412, -1.5752188252045016]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6322391552599478, -2.385601345746743, -2.1160117129929943, -1.7490195050601638, -2.0698257122356223, -1.7620397469963185, -1.7369443762285501, -1.850784515633272, -1.597210265558243, -1.4519992709908782]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2078580213464645, -3.6675080807187044, -3.1587625422775205, -2.5070544226256133, -2.9081996601530746, -2.6526967351720865, -2.6804214444797867, -2.8247238423772387, -1.8415438143616267, -1.5852514467690049]}}