{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:13:13.389455", "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": "2018-Jul-29_to_2018-Aug-09_26.5_16.0"}, "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": 2018070001228}, "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": "July 29 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 09 2018"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 12}, "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": 301019.25914272806}, "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": ["Chad", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Central-Africa", "Sahara"]}, "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": 16.0}, "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": 26.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "26.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 28.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 20.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-07-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 14.47], [23.25, 15.0], [23.47, 15.53], [24.0, 15.75], [24.25, 15.65], [24.32, 15.68], [24.35, 15.75], [24.25, 16.0], [24.47, 16.53], [25.0, 16.75], [25.25, 16.65], [25.5, 16.75], [25.75, 16.65], [25.82, 16.68], [25.97, 17.03], [26.5, 17.25], [27.03, 17.03], [27.18, 16.68], [27.53, 16.53], [27.75, 16.0], [27.53, 15.47], [27.18, 15.32], [27.15, 15.25], [27.25, 15.0], [27.03, 14.47], [26.5, 14.25], [26.25, 14.35], [26.18, 14.32], [26.03, 13.97], [25.5, 13.75], [24.97, 13.97], [24.8, 14.38], [24.5, 14.25], [24.25, 14.35], [24.0, 14.25], [23.47, 14.47]]]]}, "2018-07-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 14.47], [23.25, 15.0], [23.47, 15.53], [24.0, 15.75], [24.25, 15.65], [24.32, 15.68], [24.35, 15.75], [24.25, 16.0], [24.47, 16.53], [25.0, 16.75], [25.25, 16.65], [25.5, 16.75], [25.75, 16.65], [25.82, 16.68], [25.97, 17.03], [26.5, 17.25], [27.03, 17.03], [27.18, 16.68], [27.53, 16.53], [27.75, 16.0], [27.53, 15.47], [27.18, 15.32], [27.15, 15.25], [27.25, 15.0], [27.03, 14.47], [26.5, 14.25], [26.25, 14.35], [26.18, 14.32], [26.03, 13.97], [25.5, 13.75], [24.97, 13.97], [24.8, 14.38], [24.5, 14.25], [24.25, 14.35], [24.0, 14.25], [23.47, 14.47]]]]}, "2018-07-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 14.47], [23.25, 15.0], [23.47, 15.53], [24.0, 15.75], [24.25, 15.65], [24.32, 15.68], [24.35, 15.75], [24.25, 16.0], [24.47, 16.53], [25.0, 16.75], [25.25, 16.65], [25.5, 16.75], [25.75, 16.65], [25.82, 16.68], [25.97, 17.03], [26.5, 17.25], [27.03, 17.03], [27.18, 16.68], [27.53, 16.53], [27.75, 16.0], [27.53, 15.47], [27.18, 15.32], [27.15, 15.25], [27.25, 15.0], [27.03, 14.47], [26.5, 14.25], [26.25, 14.35], [26.18, 14.32], [26.03, 13.97], [25.5, 13.75], [24.97, 13.97], [24.8, 14.38], [24.5, 14.25], [24.25, 14.35], [24.0, 14.25], [23.47, 14.47]]]]}, "2018-08-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.25, 16.0], [24.47, 16.53], [25.0, 16.75], [25.5, 16.54], [26.0, 16.75], [26.25, 16.65], [26.5, 16.75], [26.75, 16.65], [27.0, 16.75], [27.53, 16.53], [27.68, 16.18], [28.03, 16.03], [28.25, 15.5], [28.03, 14.97], [27.5, 14.75], [27.2, 14.88], [27.03, 14.47], [26.5, 14.25], [26.25, 14.35], [26.18, 14.32], [26.03, 13.97], [25.5, 13.75], [24.97, 13.97], [24.8, 14.38], [24.5, 14.25], [23.97, 14.47], [23.75, 15.0], [23.97, 15.53], [24.32, 15.68], [24.35, 15.75], [24.25, 16.0]]]]}, "2018-08-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.97, 14.97], [26.75, 15.5], [26.97, 16.03], [27.5, 16.25], [28.03, 16.03], [28.25, 15.5], [28.03, 14.97], [27.5, 14.75], [26.97, 14.97]]], [[[22.47, 17.97], [22.25, 18.5], [22.47, 19.03], [23.0, 19.25], [23.53, 19.03], [23.75, 18.5], [23.53, 17.97], [23.0, 17.75], [22.47, 17.97]]]]}, "2018-08-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[26.97, 14.97], [26.75, 15.5], [26.97, 16.03], [27.5, 16.25], [28.03, 16.03], [28.25, 15.5], [28.03, 14.97], [27.5, 14.75], [26.97, 14.97]]], [[[26.47, 18.53], [27.0, 18.75], [27.25, 18.65], [27.5, 18.75], [28.03, 18.53], [28.18, 18.18], [28.53, 18.03], [28.75, 17.5], [28.65, 17.25], [28.75, 17.0], [28.53, 16.47], [28.0, 16.25], [27.47, 16.47], [27.25, 17.0], [27.35, 17.25], [27.32, 17.32], [27.25, 17.35], [27.0, 17.25], [26.47, 17.47], [26.25, 18.0], [26.47, 18.53]]], [[[22.47, 19.03], [23.0, 19.25], [23.25, 19.15], [23.5, 19.25], [24.03, 19.03], [24.25, 18.5], [24.13, 18.2], [24.53, 18.03], [24.75, 17.5], [24.53, 16.97], [24.0, 16.75], [23.47, 16.97], [23.25, 17.5], [23.38, 17.8], [23.25, 17.85], [23.0, 17.75], [22.47, 17.97], [22.25, 18.5], [22.47, 19.03]]]]}, "2018-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, 16.97], [17.75, 17.5], [17.97, 18.03], [18.5, 18.25], [18.75, 18.15], [18.82, 18.18], [18.97, 18.53], [19.32, 18.68], [19.47, 19.03], [20.0, 19.25], [20.25, 19.15], [20.5, 19.25], [20.75, 19.15], [20.82, 19.18], [20.97, 19.53], [21.32, 19.68], [21.47, 20.03], [21.82, 20.18], [21.97, 20.53], [22.5, 20.75], [23.03, 20.53], [23.18, 20.18], [23.25, 20.15], [23.5, 20.25], [24.03, 20.03], [24.25, 19.5], [24.15, 19.25], [24.18, 19.18], [24.53, 19.03], [24.68, 18.68], [24.75, 18.65], [25.0, 18.75], [25.25, 18.65], [25.5, 18.75], [25.75, 18.65], [26.0, 18.75], [26.25, 18.65], [26.5, 18.75], [26.75, 18.65], [27.0, 18.75], [27.25, 18.65], [27.5, 18.75], [27.75, 18.65], [28.0, 18.75], [28.53, 18.53], [28.68, 18.18], [29.03, 18.03], [29.25, 17.5], [29.15, 17.25], [29.25, 17.0], [29.15, 16.75], [29.25, 16.5], [29.15, 16.25], [29.25, 16.0], [29.03, 15.47], [28.5, 15.25], [28.25, 15.35], [28.18, 15.32], [28.03, 14.97], [27.68, 14.82], [27.53, 14.47], [27.0, 14.25], [26.47, 14.47], [26.25, 15.0], [26.35, 15.25], [26.32, 15.32], [26.25, 15.35], [26.0, 15.25], [25.47, 15.47], [25.32, 15.82], [25.25, 15.85], [25.0, 15.75], [24.75, 15.85], [24.5, 15.75], [24.25, 15.85], [24.0, 15.75], [23.75, 15.85], [23.5, 15.75], [22.97, 15.97], [22.82, 16.32], [22.47, 16.47], [22.25, 17.0], [22.35, 17.25], [22.32, 17.32], [22.25, 17.35], [22.18, 17.32], [22.03, 16.97], [21.5, 16.75], [21.25, 16.85], [21.0, 16.75], [20.75, 16.85], [20.68, 16.82], [20.53, 16.47], [20.0, 16.25], [19.75, 16.35], [19.5, 16.25], [18.97, 16.47], [18.82, 16.82], [18.75, 16.85], [18.5, 16.75], [17.97, 16.97]]]]}, "2018-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, 16.97], [17.75, 17.5], [17.97, 18.03], [18.5, 18.25], [18.75, 18.15], [18.82, 18.18], [18.97, 18.53], [19.32, 18.68], [19.47, 19.03], [20.0, 19.25], [20.25, 19.15], [20.5, 19.25], [20.75, 19.15], [20.82, 19.18], [20.97, 19.53], [21.32, 19.68], [21.47, 20.03], [21.82, 20.18], [21.97, 20.53], [22.5, 20.75], [23.03, 20.53], [23.18, 20.18], [23.25, 20.15], [23.5, 20.25], [24.03, 20.03], [24.25, 19.5], [24.15, 19.25], [24.18, 19.18], [24.53, 19.03], [24.68, 18.68], [24.75, 18.65], [25.0, 18.75], [25.25, 18.65], [25.5, 18.75], [25.75, 18.65], [26.0, 18.75], [26.25, 18.65], [26.5, 18.75], [26.75, 18.65], [27.0, 18.75], [27.25, 18.65], [27.5, 18.75], [27.75, 18.65], [28.0, 18.75], [28.53, 18.53], [28.68, 18.18], [29.03, 18.03], [29.25, 17.5], [29.15, 17.25], [29.25, 17.0], [29.15, 16.75], [29.25, 16.5], [29.15, 16.25], [29.25, 16.0], [29.03, 15.47], [28.5, 15.25], [28.25, 15.35], [28.18, 15.32], [28.03, 14.97], [27.68, 14.82], [27.53, 14.47], [27.0, 14.25], [26.47, 14.47], [26.25, 15.0], [26.35, 15.25], [26.32, 15.32], [26.25, 15.35], [26.0, 15.25], [25.47, 15.47], [25.32, 15.82], [25.25, 15.85], [25.0, 15.75], [24.75, 15.85], [24.5, 15.75], [24.25, 15.85], [24.0, 15.75], [23.75, 15.85], [23.5, 15.75], [22.97, 15.97], [22.82, 16.32], [22.47, 16.47], [22.25, 17.0], [22.35, 17.25], [22.32, 17.32], [22.25, 17.35], [22.18, 17.32], [22.03, 16.97], [21.5, 16.75], [21.25, 16.85], [21.0, 16.75], [20.75, 16.85], [20.68, 16.82], [20.53, 16.47], [20.0, 16.25], [19.75, 16.35], [19.5, 16.25], [18.97, 16.47], [18.82, 16.82], [18.75, 16.85], [18.5, 16.75], [17.97, 16.97]]]]}, "2018-08-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[17.97, 16.97], [17.75, 17.5], [17.97, 18.03], [18.5, 18.25], [18.75, 18.15], [18.82, 18.18], [18.97, 18.53], [19.32, 18.68], [19.47, 19.03], [20.0, 19.25], [20.25, 19.15], [20.5, 19.25], [20.75, 19.15], [20.82, 19.18], [20.97, 19.53], [21.32, 19.68], [21.47, 20.03], [21.82, 20.18], [21.97, 20.53], [22.5, 20.75], [23.03, 20.53], [23.18, 20.18], [23.25, 20.15], [23.5, 20.25], [24.03, 20.03], [24.25, 19.5], [24.15, 19.25], [24.18, 19.18], [24.53, 19.03], [24.68, 18.68], [24.75, 18.65], [25.0, 18.75], [25.25, 18.65], [25.5, 18.75], [25.75, 18.65], [26.0, 18.75], [26.25, 18.65], [26.5, 18.75], [26.75, 18.65], [27.0, 18.75], [27.25, 18.65], [27.5, 18.75], [27.75, 18.65], [28.0, 18.75], [28.53, 18.53], [28.68, 18.18], [29.03, 18.03], [29.25, 17.5], [29.15, 17.25], [29.25, 17.0], [29.15, 16.75], [29.25, 16.5], [29.15, 16.25], [29.25, 16.0], [29.03, 15.47], [28.5, 15.25], [28.25, 15.35], [28.18, 15.32], [28.03, 14.97], [27.68, 14.82], [27.53, 14.47], [27.0, 14.25], [26.47, 14.47], [26.25, 15.0], [26.35, 15.25], [26.32, 15.32], [26.25, 15.35], [26.0, 15.25], [25.47, 15.47], [25.32, 15.82], [25.25, 15.85], [25.0, 15.75], [24.75, 15.85], [24.5, 15.75], [24.25, 15.85], [24.0, 15.75], [23.75, 15.85], [23.5, 15.75], [22.97, 15.97], [22.82, 16.32], [22.47, 16.47], [22.25, 17.0], [22.35, 17.25], [22.32, 17.32], [22.25, 17.35], [22.18, 17.32], [22.03, 16.97], [21.5, 16.75], [21.25, 16.85], [21.0, 16.75], [20.75, 16.85], [20.68, 16.82], [20.53, 16.47], [20.0, 16.25], [19.75, 16.35], [19.5, 16.25], [18.97, 16.47], [18.82, 16.82], [18.75, 16.85], [18.5, 16.75], [17.97, 16.97]]]]}, "2018-08-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 16.97], [18.75, 17.5], [18.97, 18.03], [19.5, 18.25], [19.75, 18.15], [20.0, 18.25], [20.25, 18.15], [20.32, 18.18], [20.47, 18.53], [20.88, 18.7], [20.75, 19.0], [20.97, 19.53], [21.5, 19.75], [21.75, 19.65], [22.0, 19.75], [22.53, 19.53], [22.7, 19.13], [23.0, 19.25], [23.25, 19.15], [23.5, 19.25], [24.03, 19.03], [24.18, 18.68], [24.25, 18.65], [24.5, 18.75], [25.03, 18.53], [25.18, 18.18], [25.53, 18.03], [25.68, 17.68], [25.75, 17.65], [26.0, 17.75], [26.25, 17.65], [26.5, 17.75], [26.75, 17.65], [26.82, 17.68], [26.97, 18.03], [27.5, 18.25], [28.03, 18.03], [28.18, 17.68], [28.53, 17.53], [28.68, 17.18], [29.03, 17.03], [29.25, 16.5], [29.15, 16.25], [29.25, 16.0], [29.03, 15.47], [28.5, 15.25], [28.25, 15.35], [28.18, 15.32], [28.03, 14.97], [27.68, 14.82], [27.53, 14.47], [27.0, 14.25], [26.47, 14.47], [26.25, 15.0], [26.35, 15.25], [26.32, 15.32], [26.25, 15.35], [26.0, 15.25], [25.47, 15.47], [25.32, 15.82], [25.25, 15.85], [25.0, 15.75], [24.75, 15.85], [24.5, 15.75], [24.25, 15.85], [24.0, 15.75], [23.47, 15.97], [23.25, 16.5], [23.38, 16.8], [23.25, 16.85], [23.0, 16.75], [22.47, 16.97], [22.32, 17.32], [22.25, 17.35], [22.0, 17.25], [21.75, 17.35], [21.68, 17.32], [21.53, 16.97], [21.0, 16.75], [20.75, 16.85], [20.5, 16.75], [20.25, 16.85], [20.0, 16.75], [19.75, 16.85], [19.5, 16.75], [18.97, 16.97]]]]}, "2018-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[27.25, 17.15], [27.5, 17.25], [27.75, 17.15], [28.0, 17.25], [28.53, 17.03], [28.75, 16.5], [28.53, 15.97], [28.18, 15.82], [28.03, 15.47], [27.63, 15.3], [27.75, 15.0], [27.53, 14.47], [27.0, 14.25], [26.47, 14.47], [26.25, 15.0], [26.38, 15.3], [25.97, 15.47], [25.75, 16.0], [25.97, 16.53], [26.32, 16.68], [26.47, 17.03], [27.0, 17.25], [27.25, 17.15]]], [[[21.5, 18.54], [22.0, 18.75], [22.25, 18.65], [22.5, 18.75], [22.75, 18.65], [22.82, 18.68], [22.97, 19.03], [23.5, 19.25], [24.03, 19.03], [24.18, 18.68], [24.25, 18.65], [24.5, 18.75], [25.03, 18.53], [25.25, 18.0], [25.15, 17.75], [25.25, 17.5], [25.03, 16.97], [24.5, 16.75], [24.25, 16.85], [24.0, 16.75], [23.47, 16.97], [23.32, 17.32], [23.25, 17.35], [23.0, 17.25], [22.75, 17.35], [22.5, 17.25], [22.25, 17.35], [22.0, 17.25], [21.7, 17.38], [21.53, 16.97], [21.0, 16.75], [20.75, 16.85], [20.5, 16.75], [19.97, 16.97], [19.75, 17.5], [19.97, 18.03], [20.32, 18.18], [20.47, 18.53], [21.0, 18.75], [21.5, 18.54]]]]}, "2018-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.47, 18.53], [24.0, 18.75], [24.53, 18.53], [24.75, 18.0], [24.65, 17.75], [24.75, 17.5], [24.53, 16.97], [24.0, 16.75], [23.47, 16.97], [23.25, 17.5], [23.35, 17.75], [23.25, 18.0], [23.47, 18.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.724767508646494}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.9431399716132}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.354064907801444, 25.0372308243995, 24.477919111455094, 24.554398388610082, 27.028504141010842, 28.654676700466325, 26.55118606327312, 26.914291981196243, 27.287505161755405, 27.120587625841665, 27.327358514337504, 27.556381538536357]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.501341609339704, 23.615493952025417, 23.07447208874123, 23.3120352335406, 25.865906662535167, 25.97026463239189, 22.481478311537728, 22.960034144738074, 23.20991350589503, 24.25622638938745, 24.9513664219333, 27.360130578555754]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.9991949102848388, -3.229331952039633, -3.640585051120791, -3.430794527835653, -3.1013225404428226, -2.828139578595504, -4.648274486330512, -4.217971118352138, -3.7802369295163363, -3.451472979949035, -3.227670241922471, -2.5784877230565826]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.591583796800251, -4.016805616634201, -4.397568960051444, -4.275339647671274, -3.3306989249373373, -3.427383302217777, -5.724767508646494, -5.301890652043824, -4.839648924238986, -4.139230519917817, -3.698623484669838, -2.7439892039612914]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.1310358268407588, -1.6759581316224035, -1.8607684629263421, -1.6952676199058665, -1.5204917111907854, -1.585188994701609, -2.6118835238496643, -2.3480095857303716, -2.0960959239516965, -1.8405872642198637, -1.759599263491637, -1.4887008100819403]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.7030646380300616, -2.263124264486723, -2.3872358366347144, -2.0733447346238436, -1.6180335209930898, -2.203163965368495, -3.2816413471164854, -2.977138196160652, -2.6378720543729663, -2.252120590723123, -2.025532187643872, -1.5169292527980567]}}