{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:20.075128", "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": "2010-Dec-17_to_2010-Dec-20_21.0_27.0"}, "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": 2010120000851}, "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": "December 17 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 20 2010"}, "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": 147786.32193599455}, "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"]}, "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": 27.0}, "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": 21.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "21.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 18.75}, "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": 24.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 30.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.97, 28.03], [19.32, 28.18], [19.35, 28.25], [19.25, 28.5], [19.47, 29.03], [20.0, 29.25], [20.53, 29.03], [20.68, 28.68], [20.75, 28.65], [20.82, 28.68], [20.97, 29.03], [21.32, 29.18], [21.47, 29.53], [21.82, 29.68], [21.97, 30.03], [22.32, 30.18], [22.35, 30.25], [22.25, 30.5], [22.47, 31.03], [23.0, 31.25], [23.53, 31.03], [23.75, 30.5], [23.65, 30.25], [23.68, 30.18], [24.03, 30.03], [24.25, 29.5], [24.15, 29.25], [24.25, 29.0], [24.03, 28.47], [23.68, 28.32], [23.53, 27.97], [23.0, 27.75], [22.75, 27.85], [22.68, 27.82], [22.53, 27.47], [22.18, 27.32], [22.03, 26.97], [21.68, 26.82], [21.53, 26.47], [21.0, 26.25], [20.75, 26.35], [20.5, 26.25], [20.25, 26.35], [20.0, 26.25], [19.75, 26.35], [19.5, 26.25], [18.97, 26.47], [18.75, 27.0], [18.85, 27.25], [18.75, 27.5], [18.97, 28.03]]]]}, "2010-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 27.5], [18.97, 28.03], [19.32, 28.18], [19.35, 28.25], [19.25, 28.5], [19.47, 29.03], [20.0, 29.25], [20.53, 29.03], [20.68, 28.68], [20.75, 28.65], [20.82, 28.68], [20.97, 29.03], [21.32, 29.18], [21.47, 29.53], [21.82, 29.68], [21.97, 30.03], [22.32, 30.18], [22.35, 30.25], [22.25, 30.5], [22.47, 31.03], [23.0, 31.25], [23.53, 31.03], [23.7, 30.63], [24.0, 30.75], [24.25, 30.65], [24.5, 30.75], [25.03, 30.53], [25.18, 30.18], [25.53, 30.03], [25.75, 29.5], [25.65, 29.25], [25.75, 29.0], [25.53, 28.47], [25.0, 28.25], [24.47, 28.47], [24.32, 28.82], [24.25, 28.85], [24.18, 28.82], [24.03, 28.47], [23.68, 28.32], [23.53, 27.97], [23.0, 27.75], [22.75, 27.85], [22.68, 27.82], [22.65, 27.75], [22.68, 27.68], [23.03, 27.53], [23.25, 27.0], [23.03, 26.47], [22.68, 26.32], [22.65, 26.25], [22.75, 26.0], [22.65, 25.75], [22.75, 25.5], [22.65, 25.25], [22.75, 25.0], [22.53, 24.47], [22.0, 24.25], [21.75, 24.35], [21.5, 24.25], [20.97, 24.47], [20.82, 24.82], [20.75, 24.85], [20.5, 24.75], [19.97, 24.97], [19.75, 25.5], [19.85, 25.75], [19.82, 25.82], [19.5, 25.96], [19.0, 25.75], [18.47, 25.97], [18.25, 26.5], [18.47, 27.03], [18.82, 27.18], [18.85, 27.25], [18.75, 27.5]]]]}, "2010-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.75, 27.5], [18.97, 28.03], [19.32, 28.18], [19.35, 28.25], [19.25, 28.5], [19.47, 29.03], [20.0, 29.25], [20.53, 29.03], [20.68, 28.68], [20.75, 28.65], [20.82, 28.68], [20.97, 29.03], [21.32, 29.18], [21.47, 29.53], [21.82, 29.68], [21.97, 30.03], [22.32, 30.18], [22.35, 30.25], [22.25, 30.5], [22.47, 31.03], [23.0, 31.25], [23.53, 31.03], [23.7, 30.63], [24.0, 30.75], [24.25, 30.65], [24.5, 30.75], [25.03, 30.53], [25.18, 30.18], [25.53, 30.03], [25.75, 29.5], [25.65, 29.25], [25.75, 29.0], [25.53, 28.47], [25.0, 28.25], [24.47, 28.47], [24.32, 28.82], [24.25, 28.85], [24.18, 28.82], [24.03, 28.47], [23.68, 28.32], [23.53, 27.97], [23.0, 27.75], [22.75, 27.85], [22.68, 27.82], [22.65, 27.75], [22.68, 27.68], [23.03, 27.53], [23.25, 27.0], [23.03, 26.47], [22.68, 26.32], [22.65, 26.25], [22.75, 26.0], [22.65, 25.75], [22.75, 25.5], [22.65, 25.25], [22.75, 25.0], [22.53, 24.47], [22.0, 24.25], [21.75, 24.35], [21.5, 24.25], [20.97, 24.47], [20.82, 24.82], [20.75, 24.85], [20.5, 24.75], [19.97, 24.97], [19.75, 25.5], [19.85, 25.75], [19.82, 25.82], [19.5, 25.96], [19.0, 25.75], [18.47, 25.97], [18.25, 26.5], [18.47, 27.03], [18.82, 27.18], [18.85, 27.25], [18.75, 27.5]]]]}, "2010-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[18.25, 26.5], [18.47, 27.03], [19.0, 27.25], [19.5, 27.04], [20.0, 27.25], [20.25, 27.15], [20.32, 27.18], [20.47, 27.53], [21.0, 27.75], [21.25, 27.65], [21.32, 27.68], [21.47, 28.03], [22.0, 28.25], [22.53, 28.03], [22.68, 27.68], [23.03, 27.53], [23.25, 27.0], [23.03, 26.47], [22.68, 26.32], [22.65, 26.25], [22.75, 26.0], [22.65, 25.75], [22.75, 25.5], [22.65, 25.25], [22.75, 25.0], [22.53, 24.47], [22.0, 24.25], [21.75, 24.35], [21.5, 24.25], [20.97, 24.47], [20.82, 24.82], [20.75, 24.85], [20.5, 24.75], [19.97, 24.97], [19.75, 25.5], [19.85, 25.75], [19.82, 25.82], [19.5, 25.96], [19.0, 25.75], [18.47, 25.97], [18.25, 26.5]]], [[[24.0, 30.75], [24.25, 30.65], [24.5, 30.75], [25.03, 30.53], [25.18, 30.18], [25.53, 30.03], [25.75, 29.5], [25.65, 29.25], [25.75, 29.0], [25.53, 28.47], [25.0, 28.25], [24.47, 28.47], [24.32, 28.82], [24.25, 28.85], [24.0, 28.75], [23.47, 28.97], [23.25, 29.5], [23.35, 29.75], [23.25, 30.0], [23.47, 30.53], [24.0, 30.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.211165277472844}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.510819976594856}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.151296389724905, 8.699645434529941, 9.663528379927243, 10.024484312843185]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.087839753902188, 6.519958532952558, 8.075813239565889, 9.009447000549642]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.067360931866858, -4.369278980593894, -3.2591064258188442, -2.7572125239408027]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.6312898407230705, -6.211165277472844, -4.5305329178349325, -3.2233216575074266]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5302842392260232, -2.1391165303505453, -1.6463536450692131, -1.3920280157482343]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2973004332440414, -2.948434115645069, -2.152496669647571, -1.583739964679964]}}