{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:54.507721", "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-Jan-25_to_2018-Jan-30_25.0_28.5"}, "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": 2018010000918}, "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": "January 25 2018"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 30 2018"}, "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": 846900.9156940078}, "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": ["Egypt", "Libya", "Sudan"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Mediterranean", "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": 28.5}, "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": 25.0}, "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": 19.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 33.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 18.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2018-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 23.47], [18.75, 24.0], [18.97, 24.53], [19.5, 24.75], [20.03, 24.53], [20.25, 24.0], [20.03, 23.47], [19.5, 23.25], [18.97, 23.47]]], [[[19.47, 28.53], [19.82, 28.68], [19.85, 28.75], [19.75, 29.0], [19.85, 29.25], [19.75, 29.5], [19.96, 30.0], [19.75, 30.5], [19.85, 30.75], [19.75, 31.0], [19.97, 31.53], [20.5, 31.75], [21.03, 31.53], [21.25, 31.0], [21.15, 30.75], [21.18, 30.68], [21.25, 30.65], [21.5, 30.75], [22.0, 30.54], [22.32, 30.68], [22.35, 30.75], [22.32, 30.82], [21.97, 30.97], [21.75, 31.5], [21.97, 32.03], [22.5, 32.25], [22.75, 32.15], [23.0, 32.25], [23.53, 32.03], [23.68, 31.68], [24.03, 31.53], [24.18, 31.18], [24.53, 31.03], [24.68, 30.68], [24.75, 30.65], [25.0, 30.75], [25.53, 30.53], [25.68, 30.18], [25.75, 30.15], [26.0, 30.25], [26.53, 30.03], [26.75, 29.5], [26.53, 28.97], [26.0, 28.75], [25.75, 28.85], [25.68, 28.82], [25.65, 28.75], [25.75, 28.5], [25.65, 28.25], [25.75, 28.0], [25.65, 27.75], [25.75, 27.5], [25.65, 27.25], [25.75, 27.0], [25.54, 26.5], [25.75, 26.0], [25.65, 25.75], [25.75, 25.5], [25.53, 24.97], [25.0, 24.75], [24.75, 24.85], [24.5, 24.75], [24.25, 24.85], [24.18, 24.82], [24.03, 24.47], [23.5, 24.25], [23.25, 24.35], [23.0, 24.25], [22.47, 24.47], [22.32, 24.82], [22.0, 24.96], [21.5, 24.75], [20.97, 24.97], [20.75, 25.5], [20.85, 25.75], [20.82, 25.82], [20.47, 25.97], [20.25, 26.5], [20.35, 26.75], [20.32, 26.82], [19.97, 26.97], [19.82, 27.32], [19.47, 27.47], [19.25, 28.0], [19.47, 28.53]]]]}, "2018-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 25.53], [19.5, 25.75], [19.75, 25.65], [20.0, 25.75], [20.25, 25.65], [20.5, 25.75], [20.75, 25.65], [20.82, 25.68], [20.85, 25.75], [20.82, 25.82], [20.47, 25.97], [20.25, 26.5], [20.35, 26.75], [20.32, 26.82], [19.97, 26.97], [19.82, 27.32], [19.47, 27.47], [19.25, 28.0], [19.47, 28.53], [19.82, 28.68], [19.85, 28.75], [19.75, 29.0], [19.85, 29.25], [19.75, 29.5], [19.96, 30.0], [19.75, 30.5], [19.85, 30.75], [19.75, 31.0], [19.97, 31.53], [20.5, 31.75], [21.03, 31.53], [21.25, 31.0], [21.15, 30.75], [21.18, 30.68], [21.25, 30.65], [21.5, 30.75], [22.0, 30.54], [22.32, 30.68], [22.35, 30.75], [22.32, 30.82], [21.97, 30.97], [21.75, 31.5], [21.97, 32.03], [22.5, 32.25], [22.75, 32.15], [23.0, 32.25], [23.53, 32.03], [23.68, 31.68], [24.03, 31.53], [24.18, 31.18], [24.53, 31.03], [24.68, 30.68], [24.75, 30.65], [25.0, 30.75], [25.53, 30.53], [25.68, 30.18], [25.75, 30.15], [26.0, 30.25], [26.53, 30.03], [26.75, 29.5], [26.53, 28.97], [26.13, 28.8], [26.18, 28.68], [26.25, 28.65], [26.5, 28.75], [26.75, 28.65], [27.0, 28.75], [27.53, 28.53], [27.68, 28.18], [28.03, 28.03], [28.25, 27.5], [28.15, 27.25], [28.18, 27.18], [28.53, 27.03], [28.68, 26.68], [28.75, 26.65], [29.0, 26.75], [29.25, 26.65], [29.5, 26.75], [30.03, 26.53], [30.25, 26.0], [30.15, 25.75], [30.25, 25.5], [30.03, 24.97], [29.68, 24.82], [29.53, 24.47], [29.0, 24.25], [28.75, 24.35], [28.68, 24.32], [28.65, 24.25], [28.75, 24.0], [28.65, 23.75], [28.75, 23.5], [28.65, 23.25], [28.68, 23.18], [28.8, 23.13], [28.97, 23.53], [29.32, 23.68], [29.47, 24.03], [30.0, 24.25], [30.25, 24.15], [30.5, 24.25], [31.03, 24.03], [31.25, 23.5], [31.15, 23.25], [31.18, 23.18], [31.25, 23.15], [31.5, 23.25], [31.75, 23.15], [32.0, 23.25], [32.25, 23.15], [32.5, 23.25], [33.03, 23.03], [33.25, 22.5], [33.15, 22.25], [33.18, 22.18], [33.53, 22.03], [33.75, 21.5], [33.65, 21.25], [33.75, 21.0], [33.65, 20.75], [33.75, 20.5], [33.53, 19.97], [33.0, 19.75], [32.75, 19.85], [32.68, 19.82], [32.53, 19.47], [32.18, 19.32], [32.03, 18.97], [31.5, 18.75], [31.25, 18.85], [31.18, 18.82], [31.03, 18.47], [30.5, 18.25], [30.0, 18.46], [29.5, 18.25], [28.97, 18.47], [28.82, 18.82], [28.75, 18.85], [28.5, 18.75], [28.25, 18.85], [28.18, 18.82], [28.03, 18.47], [27.5, 18.25], [27.25, 18.35], [27.0, 18.25], [26.47, 18.47], [26.25, 19.0], [26.35, 19.25], [26.32, 19.32], [25.97, 19.47], [25.82, 19.82], [25.75, 19.85], [25.5, 19.75], [24.97, 19.97], [24.75, 20.5], [24.97, 21.03], [25.32, 21.18], [25.35, 21.25], [25.25, 21.5], [25.35, 21.75], [25.25, 22.0], [25.35, 22.25], [25.25, 22.5], [25.47, 23.03], [25.82, 23.18], [25.85, 23.25], [25.82, 23.32], [25.75, 23.35], [25.5, 23.25], [24.97, 23.47], [24.82, 23.82], [24.5, 23.96], [24.18, 23.82], [24.03, 23.47], [23.5, 23.25], [23.25, 23.35], [23.0, 23.25], [22.5, 23.46], [22.0, 23.25], [21.75, 23.35], [21.68, 23.32], [21.53, 22.97], [21.18, 22.82], [21.03, 22.47], [20.68, 22.32], [20.53, 21.97], [20.0, 21.75], [19.47, 21.97], [19.25, 22.5], [19.35, 22.75], [19.25, 23.0], [19.35, 23.25], [19.32, 23.32], [18.97, 23.47], [18.75, 24.0], [18.96, 24.5], [18.75, 25.0], [18.97, 25.53]]]]}, "2018-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 25.53], [19.5, 25.75], [19.75, 25.65], [20.0, 25.75], [20.25, 25.65], [20.5, 25.75], [20.75, 25.65], [20.82, 25.68], [20.85, 25.75], [20.82, 25.82], [20.47, 25.97], [20.25, 26.5], [20.35, 26.75], [20.32, 26.82], [19.97, 26.97], [19.82, 27.32], [19.47, 27.47], [19.25, 28.0], [19.47, 28.53], [19.82, 28.68], [19.85, 28.75], [19.75, 29.0], [19.85, 29.25], [19.75, 29.5], [19.96, 30.0], [19.75, 30.5], [19.85, 30.75], [19.75, 31.0], [19.97, 31.53], [20.5, 31.75], [21.03, 31.53], [21.25, 31.0], [21.15, 30.75], [21.18, 30.68], [21.25, 30.65], [21.5, 30.75], [22.0, 30.54], [22.32, 30.68], [22.35, 30.75], [22.32, 30.82], [21.97, 30.97], [21.75, 31.5], [21.97, 32.03], [22.5, 32.25], [22.75, 32.15], [23.0, 32.25], [23.53, 32.03], [23.68, 31.68], [24.03, 31.53], [24.18, 31.18], [24.53, 31.03], [24.68, 30.68], [24.75, 30.65], [25.0, 30.75], [25.53, 30.53], [25.68, 30.18], [25.75, 30.15], [26.0, 30.25], [26.53, 30.03], [26.75, 29.5], [26.53, 28.97], [26.13, 28.8], [26.18, 28.68], [26.25, 28.65], [26.5, 28.75], [26.75, 28.65], [27.0, 28.75], [27.53, 28.53], [27.68, 28.18], [28.03, 28.03], [28.25, 27.5], [28.15, 27.25], [28.18, 27.18], [28.53, 27.03], [28.68, 26.68], [28.75, 26.65], [29.0, 26.75], [29.25, 26.65], [29.5, 26.75], [30.03, 26.53], [30.25, 26.0], [30.15, 25.75], [30.25, 25.5], [30.03, 24.97], [29.68, 24.82], [29.53, 24.47], [29.0, 24.25], [28.75, 24.35], [28.68, 24.32], [28.65, 24.25], [28.75, 24.0], [28.65, 23.75], [28.75, 23.5], [28.65, 23.25], [28.68, 23.18], [28.8, 23.13], [28.97, 23.53], [29.32, 23.68], [29.47, 24.03], [30.0, 24.25], [30.25, 24.15], [30.5, 24.25], [31.03, 24.03], [31.25, 23.5], [31.15, 23.25], [31.18, 23.18], [31.25, 23.15], [31.5, 23.25], [31.75, 23.15], [32.0, 23.25], [32.25, 23.15], [32.5, 23.25], [33.03, 23.03], [33.25, 22.5], [33.15, 22.25], [33.18, 22.18], [33.53, 22.03], [33.75, 21.5], [33.65, 21.25], [33.75, 21.0], [33.65, 20.75], [33.75, 20.5], [33.53, 19.97], [33.0, 19.75], [32.75, 19.85], [32.68, 19.82], [32.53, 19.47], [32.18, 19.32], [32.03, 18.97], [31.5, 18.75], [31.25, 18.85], [31.18, 18.82], [31.03, 18.47], [30.5, 18.25], [30.0, 18.46], [29.5, 18.25], [28.97, 18.47], [28.82, 18.82], [28.75, 18.85], [28.5, 18.75], [28.25, 18.85], [28.18, 18.82], [28.03, 18.47], [27.5, 18.25], [27.25, 18.35], [27.0, 18.25], [26.47, 18.47], [26.25, 19.0], [26.35, 19.25], [26.32, 19.32], [25.97, 19.47], [25.82, 19.82], [25.75, 19.85], [25.5, 19.75], [24.97, 19.97], [24.75, 20.5], [24.97, 21.03], [25.32, 21.18], [25.35, 21.25], [25.25, 21.5], [25.35, 21.75], [25.25, 22.0], [25.35, 22.25], [25.25, 22.5], [25.47, 23.03], [25.82, 23.18], [25.85, 23.25], [25.82, 23.32], [25.75, 23.35], [25.5, 23.25], [24.97, 23.47], [24.82, 23.82], [24.5, 23.96], [24.18, 23.82], [24.03, 23.47], [23.5, 23.25], [23.25, 23.35], [23.0, 23.25], [22.5, 23.46], [22.0, 23.25], [21.75, 23.35], [21.68, 23.32], [21.53, 22.97], [21.18, 22.82], [21.03, 22.47], [20.68, 22.32], [20.53, 21.97], [20.0, 21.75], [19.47, 21.97], [19.25, 22.5], [19.35, 22.75], [19.25, 23.0], [19.35, 23.25], [19.32, 23.32], [18.97, 23.47], [18.75, 24.0], [18.96, 24.5], [18.75, 25.0], [18.97, 25.53]]]]}, "2018-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 25.53], [19.5, 25.75], [19.75, 25.65], [20.0, 25.75], [20.25, 25.65], [20.5, 25.75], [20.75, 25.65], [20.82, 25.68], [20.97, 26.03], [21.5, 26.25], [21.75, 26.15], [21.88, 26.2], [21.75, 26.5], [21.85, 26.75], [21.75, 27.0], [21.88, 27.3], [21.47, 27.47], [21.25, 28.0], [21.35, 28.25], [21.32, 28.32], [20.97, 28.47], [20.75, 29.0], [20.97, 29.53], [21.5, 29.75], [21.75, 29.65], [22.0, 29.75], [22.25, 29.65], [22.5, 29.75], [22.75, 29.65], [23.0, 29.75], [23.25, 29.65], [23.5, 29.75], [23.75, 29.65], [24.0, 29.75], [24.25, 29.65], [24.5, 29.75], [25.03, 29.53], [25.18, 29.18], [25.25, 29.15], [25.5, 29.25], [26.03, 29.03], [26.18, 28.68], [26.25, 28.65], [26.5, 28.75], [26.75, 28.65], [27.0, 28.75], [27.53, 28.53], [27.68, 28.18], [28.03, 28.03], [28.25, 27.5], [28.15, 27.25], [28.18, 27.18], [28.53, 27.03], [28.68, 26.68], [28.75, 26.65], [29.0, 26.75], [29.25, 26.65], [29.5, 26.75], [30.03, 26.53], [30.25, 26.0], [30.15, 25.75], [30.25, 25.5], [30.03, 24.97], [29.68, 24.82], [29.53, 24.47], [29.0, 24.25], [28.75, 24.35], [28.68, 24.32], [28.65, 24.25], [28.75, 24.0], [28.65, 23.75], [28.75, 23.5], [28.65, 23.25], [28.68, 23.18], [28.8, 23.13], [28.97, 23.53], [29.32, 23.68], [29.47, 24.03], [30.0, 24.25], [30.25, 24.15], [30.5, 24.25], [31.03, 24.03], [31.25, 23.5], [31.15, 23.25], [31.18, 23.18], [31.25, 23.15], [31.5, 23.25], [31.75, 23.15], [32.0, 23.25], [32.25, 23.15], [32.5, 23.25], [33.03, 23.03], [33.25, 22.5], [33.15, 22.25], [33.18, 22.18], [33.53, 22.03], [33.75, 21.5], [33.65, 21.25], [33.75, 21.0], [33.65, 20.75], [33.75, 20.5], [33.53, 19.97], [33.0, 19.75], [32.75, 19.85], [32.68, 19.82], [32.53, 19.47], [32.18, 19.32], [32.03, 18.97], [31.5, 18.75], [31.25, 18.85], [31.18, 18.82], [31.03, 18.47], [30.5, 18.25], [30.0, 18.46], [29.5, 18.25], [28.97, 18.47], [28.82, 18.82], [28.75, 18.85], [28.5, 18.75], [28.25, 18.85], [28.18, 18.82], [28.03, 18.47], [27.5, 18.25], [27.25, 18.35], [27.0, 18.25], [26.47, 18.47], [26.25, 19.0], [26.35, 19.25], [26.32, 19.32], [25.97, 19.47], [25.82, 19.82], [25.75, 19.85], [25.5, 19.75], [24.97, 19.97], [24.75, 20.5], [24.97, 21.03], [25.32, 21.18], [25.35, 21.25], [25.25, 21.5], [25.35, 21.75], [25.25, 22.0], [25.35, 22.25], [25.25, 22.5], [25.47, 23.03], [25.82, 23.18], [25.85, 23.25], [25.82, 23.32], [25.75, 23.35], [25.5, 23.25], [24.97, 23.47], [24.82, 23.82], [24.5, 23.96], [24.18, 23.82], [24.03, 23.47], [23.5, 23.25], [23.25, 23.35], [23.0, 23.25], [22.5, 23.46], [22.0, 23.25], [21.75, 23.35], [21.68, 23.32], [21.53, 22.97], [21.18, 22.82], [21.03, 22.47], [20.68, 22.32], [20.53, 21.97], [20.0, 21.75], [19.47, 21.97], [19.25, 22.5], [19.35, 22.75], [19.25, 23.0], [19.35, 23.25], [19.25, 23.5], [19.35, 23.75], [19.25, 24.0], [19.35, 24.25], [19.32, 24.32], [18.97, 24.47], [18.75, 25.0], [18.97, 25.53]], [[22.97, 25.53], [23.32, 25.68], [23.35, 25.75], [23.3, 25.88], [23.0, 25.75], [22.75, 25.85], [22.63, 25.8], [22.75, 25.5], [22.65, 25.25], [22.68, 25.18], [22.75, 25.15], [22.82, 25.18], [22.97, 25.53]]], [[[22.97, 31.03], [23.5, 31.25], [24.03, 31.03], [24.25, 30.5], [24.03, 29.97], [23.5, 29.75], [22.97, 29.97], [22.75, 30.5], [22.97, 31.03]]]]}, "2018-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, 26.53], [25.0, 26.75], [25.53, 26.53], [25.68, 26.18], [26.03, 26.03], [26.25, 25.5], [26.15, 25.25], [26.25, 25.0], [26.15, 24.75], [26.25, 24.5], [26.03, 23.97], [25.5, 23.75], [24.97, 23.97], [24.75, 24.5], [24.85, 24.75], [24.75, 25.0], [24.85, 25.25], [24.82, 25.32], [24.47, 25.47], [24.25, 26.0], [24.47, 26.53]]], [[[24.5, 29.75], [25.03, 29.53], [25.18, 29.18], [25.53, 29.03], [25.75, 28.5], [25.65, 28.25], [25.75, 28.0], [25.53, 27.47], [25.0, 27.25], [24.47, 27.47], [24.32, 27.82], [23.97, 27.97], [23.75, 28.5], [23.85, 28.75], [23.75, 29.0], [23.97, 29.53], [24.5, 29.75]]]]}, "2018-01-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[23.75, 29.0], [23.97, 29.53], [24.5, 29.75], [25.03, 29.53], [25.18, 29.18], [25.53, 29.03], [25.75, 28.5], [25.53, 27.97], [25.0, 27.75], [24.47, 27.97], [24.32, 28.32], [23.97, 28.47], [23.75, 29.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.097365937893073}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.071106228474533}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.679149201655605, 9.096402543433669, 9.471797137643023, 10.219801803091343, 9.533700855766938, 10.039732734262998]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.725636608222487, 4.4202102541064505, 5.5403997485713035, 6.456264156883151, 8.607195229868637, 9.883798627923397]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.288482677078728, -4.564134750416063, -4.21565997106442, -3.6468055388728726, -3.0530412265388733, -2.4389720452767847]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.781893976819049, -7.097365937893073, -5.975691197869878, -5.034739224100349, -3.90281390362577, -2.5769325781169528]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4615077060625772, -1.670290000803762, -1.5020736023778767, -1.2581782139661177, -1.1461913915281272, -1.1583233109029931]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.039841075933429, -2.349326053856229, -1.910480179739771, -1.462113741616942, -1.238542009523052, -1.20109992522515]}}