{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:32:20.162905", "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": "2022-Sep-19_to_2022-Sep-23_34.5_21.0"}, "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": 2022090000684}, "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": "September 19 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 23 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 170522.80308132333}, "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", "Sudan"]}, "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": 21.0}, "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": 34.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "34.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 31.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 37.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 17.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[33.85, 23.75], [33.75, 24.0], [33.97, 24.53], [34.5, 24.75], [34.75, 24.65], [35.0, 24.75], [35.53, 24.53], [35.75, 24.0], [35.53, 23.47], [35.18, 23.32], [35.15, 23.25], [35.25, 23.0], [35.03, 22.47], [34.5, 22.25], [33.97, 22.47], [33.75, 23.0], [33.85, 23.25], [33.75, 23.5], [33.85, 23.75]]]]}, "2022-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[35.97, 22.53], [36.5, 22.75], [37.03, 22.53], [37.25, 22.0], [37.15, 21.75], [37.18, 21.68], [37.53, 21.53], [37.75, 21.0], [37.65, 20.75], [37.75, 20.5], [37.65, 20.25], [37.75, 20.0], [37.65, 19.75], [37.75, 19.5], [37.53, 18.97], [37.0, 18.75], [36.47, 18.97], [36.25, 19.5], [36.35, 19.75], [36.25, 20.0], [36.35, 20.25], [36.25, 20.5], [36.35, 20.75], [36.32, 20.82], [35.97, 20.97], [35.75, 21.5], [35.85, 21.75], [35.75, 22.0], [35.97, 22.53]]], [[[33.32, 22.68], [33.47, 23.03], [33.82, 23.18], [33.85, 23.25], [33.75, 23.5], [33.85, 23.75], [33.75, 24.0], [33.97, 24.53], [34.5, 24.75], [34.75, 24.65], [35.0, 24.75], [35.53, 24.53], [35.75, 24.0], [35.65, 23.75], [35.75, 23.5], [35.65, 23.25], [35.75, 23.0], [35.65, 22.75], [35.75, 22.5], [35.65, 22.25], [35.75, 22.0], [35.65, 21.75], [35.75, 21.5], [35.53, 20.97], [35.18, 20.82], [35.03, 20.47], [34.5, 20.25], [34.25, 20.35], [34.0, 20.25], [33.47, 20.47], [33.32, 20.82], [32.97, 20.97], [32.75, 21.5], [32.85, 21.75], [32.75, 22.0], [32.97, 22.53], [33.32, 22.68]]]]}, "2022-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.47, 20.03], [31.82, 20.18], [31.97, 20.53], [32.32, 20.68], [32.47, 21.03], [32.82, 21.18], [32.85, 21.25], [32.75, 21.5], [32.85, 21.75], [32.75, 22.0], [32.97, 22.53], [33.32, 22.68], [33.47, 23.03], [33.82, 23.18], [33.85, 23.25], [33.75, 23.5], [33.85, 23.75], [33.75, 24.0], [33.97, 24.53], [34.5, 24.75], [34.75, 24.65], [35.0, 24.75], [35.53, 24.53], [35.75, 24.0], [35.65, 23.75], [35.75, 23.5], [35.65, 23.25], [35.75, 23.0], [35.65, 22.75], [35.75, 22.5], [35.65, 22.25], [35.68, 22.18], [35.8, 22.13], [35.97, 22.53], [36.5, 22.75], [37.03, 22.53], [37.25, 22.0], [37.15, 21.75], [37.18, 21.68], [37.53, 21.53], [37.75, 21.0], [37.65, 20.75], [37.75, 20.5], [37.65, 20.25], [37.75, 20.0], [37.65, 19.75], [37.75, 19.5], [37.53, 18.97], [37.0, 18.75], [36.47, 18.97], [36.3, 19.38], [36.0, 19.25], [35.75, 19.35], [35.5, 19.25], [35.25, 19.35], [35.18, 19.32], [35.03, 18.97], [34.68, 18.82], [34.53, 18.47], [34.18, 18.32], [34.15, 18.25], [34.25, 18.0], [34.03, 17.47], [33.5, 17.25], [33.25, 17.35], [33.0, 17.25], [32.47, 17.47], [32.25, 18.0], [32.35, 18.25], [32.32, 18.32], [32.25, 18.35], [32.0, 18.25], [31.47, 18.47], [31.25, 19.0], [31.35, 19.25], [31.25, 19.5], [31.47, 20.03]]]]}, "2022-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.47, 20.03], [31.82, 20.18], [31.97, 20.53], [32.32, 20.68], [32.47, 21.03], [32.82, 21.18], [32.85, 21.25], [32.75, 21.5], [32.85, 21.75], [32.75, 22.0], [32.97, 22.53], [33.32, 22.68], [33.47, 23.03], [33.82, 23.18], [33.85, 23.25], [33.75, 23.5], [33.85, 23.75], [33.75, 24.0], [33.97, 24.53], [34.5, 24.75], [34.75, 24.65], [35.0, 24.75], [35.53, 24.53], [35.75, 24.0], [35.65, 23.75], [35.75, 23.5], [35.65, 23.25], [35.75, 23.0], [35.65, 22.75], [35.75, 22.5], [35.65, 22.25], [35.68, 22.18], [35.8, 22.13], [35.97, 22.53], [36.5, 22.75], [37.03, 22.53], [37.25, 22.0], [37.15, 21.75], [37.18, 21.68], [37.53, 21.53], [37.75, 21.0], [37.65, 20.75], [37.75, 20.5], [37.65, 20.25], [37.75, 20.0], [37.65, 19.75], [37.75, 19.5], [37.53, 18.97], [37.0, 18.75], [36.47, 18.97], [36.3, 19.38], [36.0, 19.25], [35.75, 19.35], [35.5, 19.25], [35.25, 19.35], [35.18, 19.32], [35.03, 18.97], [34.68, 18.82], [34.53, 18.47], [34.18, 18.32], [34.15, 18.25], [34.25, 18.0], [34.03, 17.47], [33.5, 17.25], [33.25, 17.35], [33.0, 17.25], [32.47, 17.47], [32.25, 18.0], [32.35, 18.25], [32.32, 18.32], [32.25, 18.35], [32.0, 18.25], [31.47, 18.47], [31.25, 19.0], [31.35, 19.25], [31.25, 19.5], [31.47, 20.03]]]]}, "2022-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[31.47, 20.03], [31.82, 20.18], [31.97, 20.53], [32.32, 20.68], [32.47, 21.03], [32.82, 21.18], [32.85, 21.25], [32.75, 21.5], [32.97, 22.03], [33.32, 22.18], [33.35, 22.25], [33.25, 22.5], [33.47, 23.03], [34.0, 23.25], [34.25, 23.15], [34.5, 23.25], [34.75, 23.15], [35.0, 23.25], [35.53, 23.03], [35.75, 22.5], [35.65, 22.25], [35.68, 22.18], [36.03, 22.03], [36.18, 21.68], [36.5, 21.54], [37.0, 21.75], [37.53, 21.53], [37.75, 21.0], [37.53, 20.47], [37.0, 20.25], [36.7, 20.38], [36.65, 20.25], [36.75, 20.0], [36.53, 19.47], [36.0, 19.25], [35.75, 19.35], [35.5, 19.25], [35.25, 19.35], [35.18, 19.32], [35.03, 18.97], [34.68, 18.82], [34.53, 18.47], [34.18, 18.32], [34.15, 18.25], [34.25, 18.0], [34.03, 17.47], [33.5, 17.25], [33.25, 17.35], [33.0, 17.25], [32.47, 17.47], [32.25, 18.0], [32.35, 18.25], [32.32, 18.32], [32.25, 18.35], [32.0, 18.25], [31.47, 18.47], [31.25, 19.0], [31.35, 19.25], [31.25, 19.5], [31.47, 20.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.8058870740050565}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.522126039343767}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.192854727307747, 29.975438272433394, 30.832084433060402, 30.391500539105664, 31.423441500292142]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [28.664012546801416, 28.195980991057866, 27.97886725994789, 27.738890856889554, 28.912317494640888]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.3692067139228925, -2.417490729391213, -2.4837505684454704, -2.865139228539217, -2.20837996851324]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.738487565062769, -3.1597513577995073, -3.8058870740050565, -3.5381597888626857, -2.832682106996515]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5212387526013715, -1.698140127333412, -1.9043891143457679, -2.2875332994368023, -1.7913674182481278]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6335899668638365, -1.9260710357786417, -2.8569451562018258, -2.9517132515680387, -2.546334926521966]}}