{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:08:39.947212", "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-Aug-14_to_2017-Aug-17_20.0_23.5"}, "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": 2017080000461}, "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": "August 14 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 17 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 293885.6676002586}, "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", "Libya"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": 23.5}, "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": 20.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "20.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 16.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 25.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[20.47, 28.03], [20.82, 28.18], [20.97, 28.53], [21.5, 28.75], [22.03, 28.53], [22.25, 28.0], [22.15, 27.75], [22.25, 27.5], [22.15, 27.25], [22.25, 27.0], [22.03, 26.47], [21.5, 26.25], [21.25, 26.35], [21.0, 26.25], [20.47, 26.47], [20.25, 27.0], [20.35, 27.25], [20.25, 27.5], [20.47, 28.03]]]]}, "2017-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.85, 27.75], [15.75, 28.0], [15.85, 28.25], [15.75, 28.5], [15.97, 29.03], [16.5, 29.25], [17.03, 29.03], [17.18, 28.68], [17.53, 28.53], [17.68, 28.18], [18.03, 28.03], [18.18, 27.68], [18.53, 27.53], [18.75, 27.0], [18.65, 26.75], [18.75, 26.5], [18.65, 26.25], [18.68, 26.18], [18.75, 26.15], [19.0, 26.25], [19.25, 26.15], [19.5, 26.25], [20.0, 26.04], [20.32, 26.18], [20.46, 26.5], [20.25, 27.0], [20.35, 27.25], [20.25, 27.5], [20.47, 28.03], [20.82, 28.18], [20.97, 28.53], [21.5, 28.75], [22.03, 28.53], [22.25, 28.0], [22.15, 27.75], [22.25, 27.5], [22.15, 27.25], [22.18, 27.18], [22.53, 27.03], [22.68, 26.68], [22.75, 26.65], [22.82, 26.68], [22.97, 27.03], [23.32, 27.18], [23.47, 27.53], [24.0, 27.75], [24.25, 27.65], [24.5, 27.75], [24.75, 27.65], [25.0, 27.75], [25.53, 27.53], [25.75, 27.0], [25.53, 26.47], [25.0, 26.25], [24.75, 26.35], [24.68, 26.32], [24.53, 25.97], [24.18, 25.82], [24.15, 25.75], [24.25, 25.5], [24.15, 25.25], [24.25, 25.0], [24.15, 24.75], [24.25, 24.5], [24.03, 23.97], [23.68, 23.82], [23.53, 23.47], [23.18, 23.32], [23.03, 22.97], [22.68, 22.82], [22.53, 22.47], [22.18, 22.32], [22.03, 21.97], [21.5, 21.75], [21.25, 21.85], [21.0, 21.75], [20.47, 21.97], [20.32, 22.32], [20.25, 22.35], [20.0, 22.25], [19.47, 22.47], [19.32, 22.82], [19.0, 22.96], [18.5, 22.75], [18.25, 22.85], [18.18, 22.82], [18.15, 22.75], [18.25, 22.5], [18.15, 22.25], [18.25, 22.0], [18.03, 21.47], [17.5, 21.25], [17.25, 21.35], [17.0, 21.25], [16.47, 21.47], [16.25, 22.0], [16.47, 22.53], [16.82, 22.68], [16.85, 22.75], [16.75, 23.0], [16.88, 23.3], [16.47, 23.47], [16.25, 24.0], [16.35, 24.25], [16.25, 24.5], [16.35, 24.75], [16.25, 25.0], [16.35, 25.25], [16.25, 25.5], [16.46, 26.0], [16.32, 26.32], [15.97, 26.47], [15.75, 27.0], [15.85, 27.25], [15.75, 27.5], [15.85, 27.75]]]]}, "2017-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.85, 27.75], [15.75, 28.0], [15.85, 28.25], [15.75, 28.5], [15.97, 29.03], [16.5, 29.25], [17.03, 29.03], [17.18, 28.68], [17.53, 28.53], [17.68, 28.18], [18.03, 28.03], [18.18, 27.68], [18.53, 27.53], [18.75, 27.0], [18.65, 26.75], [18.75, 26.5], [18.65, 26.25], [18.68, 26.18], [18.75, 26.15], [19.0, 26.25], [19.25, 26.15], [19.5, 26.25], [20.0, 26.04], [20.32, 26.18], [20.46, 26.5], [20.25, 27.0], [20.35, 27.25], [20.25, 27.5], [20.47, 28.03], [20.82, 28.18], [20.97, 28.53], [21.5, 28.75], [22.03, 28.53], [22.25, 28.0], [22.15, 27.75], [22.25, 27.5], [22.15, 27.25], [22.18, 27.18], [22.53, 27.03], [22.68, 26.68], [22.75, 26.65], [22.82, 26.68], [22.97, 27.03], [23.32, 27.18], [23.47, 27.53], [24.0, 27.75], [24.25, 27.65], [24.5, 27.75], [24.75, 27.65], [25.0, 27.75], [25.53, 27.53], [25.75, 27.0], [25.53, 26.47], [25.0, 26.25], [24.75, 26.35], [24.68, 26.32], [24.53, 25.97], [24.18, 25.82], [24.15, 25.75], [24.25, 25.5], [24.15, 25.25], [24.25, 25.0], [24.15, 24.75], [24.25, 24.5], [24.03, 23.97], [23.68, 23.82], [23.53, 23.47], [23.18, 23.32], [23.03, 22.97], [22.68, 22.82], [22.53, 22.47], [22.18, 22.32], [22.03, 21.97], [21.5, 21.75], [21.25, 21.85], [21.0, 21.75], [20.47, 21.97], [20.32, 22.32], [20.25, 22.35], [20.0, 22.25], [19.47, 22.47], [19.32, 22.82], [19.0, 22.96], [18.5, 22.75], [18.25, 22.85], [18.18, 22.82], [18.15, 22.75], [18.25, 22.5], [18.15, 22.25], [18.25, 22.0], [18.03, 21.47], [17.5, 21.25], [17.25, 21.35], [17.0, 21.25], [16.47, 21.47], [16.25, 22.0], [16.47, 22.53], [16.82, 22.68], [16.85, 22.75], [16.75, 23.0], [16.88, 23.3], [16.47, 23.47], [16.25, 24.0], [16.35, 24.25], [16.25, 24.5], [16.35, 24.75], [16.25, 25.0], [16.35, 25.25], [16.25, 25.5], [16.46, 26.0], [16.32, 26.32], [15.97, 26.47], [15.75, 27.0], [15.85, 27.25], [15.75, 27.5], [15.85, 27.75]]]]}, "2017-08-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.85, 27.75], [15.75, 28.0], [15.85, 28.25], [15.75, 28.5], [15.97, 29.03], [16.5, 29.25], [17.03, 29.03], [17.18, 28.68], [17.53, 28.53], [17.68, 28.18], [18.03, 28.03], [18.18, 27.68], [18.53, 27.53], [18.75, 27.0], [18.65, 26.75], [18.75, 26.5], [18.65, 26.25], [18.68, 26.18], [18.75, 26.15], [19.0, 26.25], [19.25, 26.15], [19.5, 26.25], [20.0, 26.04], [20.32, 26.18], [20.47, 26.53], [21.0, 26.75], [21.25, 26.65], [21.32, 26.68], [21.47, 27.03], [22.0, 27.25], [22.53, 27.03], [22.68, 26.68], [22.75, 26.65], [22.82, 26.68], [22.97, 27.03], [23.32, 27.18], [23.47, 27.53], [24.0, 27.75], [24.25, 27.65], [24.5, 27.75], [24.75, 27.65], [25.0, 27.75], [25.53, 27.53], [25.75, 27.0], [25.53, 26.47], [25.0, 26.25], [24.75, 26.35], [24.68, 26.32], [24.53, 25.97], [24.18, 25.82], [24.15, 25.75], [24.25, 25.5], [24.15, 25.25], [24.25, 25.0], [24.15, 24.75], [24.25, 24.5], [24.03, 23.97], [23.68, 23.82], [23.53, 23.47], [23.18, 23.32], [23.03, 22.97], [22.68, 22.82], [22.53, 22.47], [22.18, 22.32], [22.03, 21.97], [21.5, 21.75], [21.25, 21.85], [21.0, 21.75], [20.47, 21.97], [20.32, 22.32], [20.25, 22.35], [20.0, 22.25], [19.47, 22.47], [19.32, 22.82], [19.0, 22.96], [18.5, 22.75], [18.25, 22.85], [18.18, 22.82], [18.15, 22.75], [18.25, 22.5], [18.15, 22.25], [18.25, 22.0], [18.03, 21.47], [17.5, 21.25], [17.25, 21.35], [17.0, 21.25], [16.47, 21.47], [16.25, 22.0], [16.47, 22.53], [16.82, 22.68], [16.85, 22.75], [16.75, 23.0], [16.88, 23.3], [16.47, 23.47], [16.25, 24.0], [16.35, 24.25], [16.25, 24.5], [16.35, 24.75], [16.25, 25.0], [16.35, 25.25], [16.25, 25.5], [16.46, 26.0], [16.32, 26.32], [15.97, 26.47], [15.75, 27.0], [15.85, 27.25], [15.75, 27.5], [15.85, 27.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.84812810002893}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.6033471467677116}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.512003208470276, 28.19479142414133, 27.83500148179678, 28.348005004815775]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.02498241119133, 25.017697274388127, 24.701687078246152, 25.26604315638849]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.250758743762583, -2.5913369095678758, -2.9270262259637936, -2.293724282821906]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.405477277856164, -3.4539815784127086, -3.84812810002893, -3.3011253083121233]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3130687008110888, -1.508864948468825, -1.7555237929979122, -1.4190371457851085]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3610918358279092, -1.8651330814998637, -2.1579904375037855, -1.6983454916076692]}}