{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:21:01.959345", "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": "2020-Aug-13_to_2020-Aug-16_25.0_22.0"}, "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": 2020080000477}, "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 13 2020"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 16 2020"}, "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": 89699.63560275918}, "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": 22.0}, "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": 24.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 29.75}, "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": 22.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2020-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, 21.47], [24.25, 22.0], [24.47, 22.53], [25.0, 22.75], [25.25, 22.65], [25.5, 22.75], [26.03, 22.53], [26.25, 22.0], [26.03, 21.47], [25.5, 21.25], [25.25, 21.35], [25.0, 21.25], [24.47, 21.47]]]]}, "2020-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.35, 22.25], [24.25, 22.5], [24.47, 23.03], [25.0, 23.25], [25.53, 23.03], [25.68, 22.68], [26.03, 22.53], [26.25, 22.0], [26.15, 21.75], [26.18, 21.68], [26.25, 21.65], [26.5, 21.75], [26.75, 21.65], [27.0, 21.75], [27.25, 21.65], [27.5, 21.75], [28.0, 21.54], [28.5, 21.75], [29.03, 21.53], [29.18, 21.18], [29.25, 21.15], [29.5, 21.25], [30.03, 21.03], [30.25, 20.5], [30.03, 19.97], [29.5, 19.75], [29.25, 19.85], [29.0, 19.75], [28.75, 19.85], [28.68, 19.82], [28.53, 19.47], [28.18, 19.32], [28.03, 18.97], [27.5, 18.75], [26.97, 18.97], [26.82, 19.32], [26.75, 19.35], [26.5, 19.25], [26.25, 19.35], [26.18, 19.32], [26.15, 19.25], [26.25, 19.0], [26.03, 18.47], [25.5, 18.25], [24.97, 18.47], [24.82, 18.82], [24.47, 18.97], [24.25, 19.5], [24.46, 20.0], [24.25, 20.5], [24.46, 21.0], [24.25, 21.5], [24.35, 21.75], [24.25, 22.0], [24.35, 22.25]]]]}, "2020-08-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.35, 22.25], [24.25, 22.5], [24.47, 23.03], [25.0, 23.25], [25.53, 23.03], [25.68, 22.68], [26.03, 22.53], [26.25, 22.0], [26.15, 21.75], [26.18, 21.68], [26.25, 21.65], [26.5, 21.75], [26.75, 21.65], [27.0, 21.75], [27.25, 21.65], [27.5, 21.75], [28.0, 21.54], [28.5, 21.75], [29.03, 21.53], [29.18, 21.18], [29.25, 21.15], [29.5, 21.25], [30.03, 21.03], [30.25, 20.5], [30.03, 19.97], [29.5, 19.75], [29.25, 19.85], [29.0, 19.75], [28.75, 19.85], [28.68, 19.82], [28.53, 19.47], [28.18, 19.32], [28.03, 18.97], [27.5, 18.75], [26.97, 18.97], [26.82, 19.32], [26.75, 19.35], [26.5, 19.25], [26.25, 19.35], [26.18, 19.32], [26.15, 19.25], [26.25, 19.0], [26.03, 18.47], [25.5, 18.25], [24.97, 18.47], [24.82, 18.82], [24.47, 18.97], [24.25, 19.5], [24.46, 20.0], [24.25, 20.5], [24.46, 21.0], [24.25, 21.5], [24.35, 21.75], [24.25, 22.0], [24.35, 22.25]]]]}, "2020-08-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.35, 22.25], [24.25, 22.5], [24.47, 23.03], [25.0, 23.25], [25.53, 23.03], [25.68, 22.68], [26.03, 22.53], [26.25, 22.0], [26.15, 21.75], [26.18, 21.68], [26.25, 21.65], [26.5, 21.75], [26.75, 21.65], [27.0, 21.75], [27.25, 21.65], [27.5, 21.75], [28.0, 21.54], [28.5, 21.75], [29.03, 21.53], [29.18, 21.18], [29.25, 21.15], [29.5, 21.25], [30.03, 21.03], [30.25, 20.5], [30.03, 19.97], [29.5, 19.75], [29.25, 19.85], [29.0, 19.75], [28.75, 19.85], [28.68, 19.82], [28.53, 19.47], [28.18, 19.32], [28.03, 18.97], [27.5, 18.75], [26.97, 18.97], [26.82, 19.32], [26.75, 19.35], [26.5, 19.25], [26.25, 19.35], [26.18, 19.32], [26.15, 19.25], [26.25, 19.0], [26.03, 18.47], [25.5, 18.25], [24.97, 18.47], [24.82, 18.82], [24.47, 18.97], [24.25, 19.5], [24.46, 20.0], [24.25, 20.5], [24.46, 21.0], [24.25, 21.5], [24.35, 21.75], [24.25, 22.0], [24.35, 22.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.9770818133333137}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.17432070045942}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [29.205061177735104, 29.53638795857546, 29.53093716456965, 29.70491902775393]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [29.16062251081945, 27.740324614074837, 27.9483953154583, 28.297029703246096]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.0459336456382573, -2.2739004570768313, -2.2428895374299547, -2.0144551426663884]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.1541142280585746, -2.828263976945209, -2.9770818133333137, -2.4164188261170807]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.360714997726601, -1.5864229398107716, -1.5557498775062109, -1.406541397717816]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3978918231913575, -1.8389192822189386, -2.0006419219671394, -1.6271736635137006]}}