{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:07.460466", "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": "2011-Aug-12_to_2011-Aug-14_25.5_29.5"}, "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": 2011080000701}, "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 12 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 14 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 58984.598351028486}, "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"]}, "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": 29.5}, "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": 25.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "25.5\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": 28.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 28.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 31.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, 31.03], [24.82, 31.18], [24.97, 31.53], [25.5, 31.75], [26.03, 31.53], [26.18, 31.18], [26.25, 31.15], [26.5, 31.25], [27.03, 31.03], [27.18, 30.68], [27.25, 30.65], [27.5, 30.75], [28.0, 30.54], [28.5, 30.75], [29.03, 30.53], [29.25, 30.0], [29.15, 29.75], [29.25, 29.5], [29.15, 29.25], [29.25, 29.0], [29.03, 28.47], [28.5, 28.25], [28.25, 28.35], [28.0, 28.25], [27.47, 28.47], [27.32, 28.82], [27.25, 28.85], [27.18, 28.82], [27.03, 28.47], [26.5, 28.25], [25.97, 28.47], [25.82, 28.82], [25.75, 28.85], [25.5, 28.75], [24.97, 28.97], [24.82, 29.32], [24.47, 29.47], [24.25, 30.0], [24.35, 30.25], [24.25, 30.5], [24.47, 31.03]]]]}, "2011-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, 31.03], [24.82, 31.18], [24.97, 31.53], [25.5, 31.75], [26.03, 31.53], [26.18, 31.18], [26.25, 31.15], [26.5, 31.25], [27.03, 31.03], [27.18, 30.68], [27.25, 30.65], [27.5, 30.75], [28.0, 30.54], [28.5, 30.75], [29.03, 30.53], [29.25, 30.0], [29.15, 29.75], [29.25, 29.5], [29.15, 29.25], [29.25, 29.0], [29.03, 28.47], [28.5, 28.25], [28.25, 28.35], [28.0, 28.25], [27.47, 28.47], [27.32, 28.82], [27.25, 28.85], [27.18, 28.82], [27.03, 28.47], [26.5, 28.25], [25.97, 28.47], [25.82, 28.82], [25.75, 28.85], [25.5, 28.75], [24.97, 28.97], [24.82, 29.32], [24.47, 29.47], [24.25, 30.0], [24.35, 30.25], [24.25, 30.5], [24.47, 31.03]]]]}, "2011-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[24.47, 31.03], [24.82, 31.18], [24.97, 31.53], [25.5, 31.75], [26.03, 31.53], [26.18, 31.18], [26.25, 31.15], [26.5, 31.25], [27.03, 31.03], [27.18, 30.68], [27.25, 30.65], [27.5, 30.75], [28.0, 30.54], [28.5, 30.75], [29.03, 30.53], [29.25, 30.0], [29.15, 29.75], [29.25, 29.5], [29.15, 29.25], [29.25, 29.0], [29.03, 28.47], [28.5, 28.25], [28.25, 28.35], [28.0, 28.25], [27.47, 28.47], [27.32, 28.82], [27.25, 28.85], [27.18, 28.82], [27.03, 28.47], [26.5, 28.25], [25.97, 28.47], [25.82, 28.82], [25.75, 28.85], [25.5, 28.75], [24.97, 28.97], [24.82, 29.32], [24.47, 29.47], [24.25, 30.0], [24.35, 30.25], [24.25, 30.5], [24.47, 31.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -2.9893294227676392}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.013929539846847}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [27.968264137483573, 27.08673660252549, 27.762267766354285]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [25.636295097687594, 25.05446680885359, 25.527106743663637]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-1.7194081659531444, -2.526739985147525, -1.7956404684398706]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-1.95160235356758, -2.9893294227676392, -2.315624487611558]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.203492745233431, -1.8609167259263275, -1.379669129801675]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3169807549995562, -2.1306570067574664, -1.773804892813311]}}