{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:25.933716", "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": "2015-Dec-24_to_2015-Dec-27_40.5_24.5"}, "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": 2015120000631}, "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 24 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 27 2015"}, "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": 55652.44805812902}, "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": ["Saudi Arabia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Arabian-Peninsula"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia"]}, "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": 24.5}, "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": 40.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "40.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 38.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 40.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.97, 27.53], [38.5, 27.75], [38.75, 27.65], [39.0, 27.75], [39.25, 27.65], [39.5, 27.75], [40.03, 27.53], [40.18, 27.18], [40.25, 27.15], [40.5, 27.25], [41.03, 27.03], [41.25, 26.5], [41.03, 25.97], [40.68, 25.82], [40.65, 25.75], [40.75, 25.5], [40.63, 25.2], [41.03, 25.03], [41.25, 24.5], [41.15, 24.25], [41.25, 24.0], [41.03, 23.47], [40.5, 23.25], [39.97, 23.47], [39.75, 24.0], [39.85, 24.25], [39.8, 24.38], [39.5, 24.25], [38.97, 24.47], [38.82, 24.82], [38.47, 24.97], [38.25, 25.5], [38.35, 25.75], [38.32, 25.82], [37.97, 25.97], [37.75, 26.5], [37.85, 26.75], [37.75, 27.0], [37.97, 27.53]]]]}, "2015-12-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.97, 27.53], [38.5, 27.75], [38.75, 27.65], [39.0, 27.75], [39.25, 27.65], [39.5, 27.75], [40.03, 27.53], [40.18, 27.18], [40.25, 27.15], [40.5, 27.25], [41.03, 27.03], [41.25, 26.5], [41.03, 25.97], [40.68, 25.82], [40.65, 25.75], [40.68, 25.68], [41.03, 25.53], [41.25, 25.0], [41.15, 24.75], [41.25, 24.5], [41.15, 24.25], [41.25, 24.0], [41.03, 23.47], [40.5, 23.25], [39.97, 23.47], [39.82, 23.82], [39.47, 23.97], [39.32, 24.32], [38.97, 24.47], [38.82, 24.82], [38.47, 24.97], [38.25, 25.5], [38.35, 25.75], [38.32, 25.82], [37.97, 25.97], [37.75, 26.5], [37.85, 26.75], [37.75, 27.0], [37.97, 27.53]]]]}, "2015-12-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.97, 27.53], [38.5, 27.75], [38.75, 27.65], [39.0, 27.75], [39.25, 27.65], [39.5, 27.75], [40.03, 27.53], [40.18, 27.18], [40.25, 27.15], [40.5, 27.25], [41.03, 27.03], [41.25, 26.5], [41.03, 25.97], [40.68, 25.82], [40.65, 25.75], [40.68, 25.68], [41.03, 25.53], [41.25, 25.0], [41.15, 24.75], [41.25, 24.5], [41.15, 24.25], [41.25, 24.0], [41.03, 23.47], [40.5, 23.25], [39.97, 23.47], [39.82, 23.82], [39.47, 23.97], [39.32, 24.32], [38.97, 24.47], [38.82, 24.82], [38.47, 24.97], [38.25, 25.5], [38.35, 25.75], [38.32, 25.82], [37.97, 25.97], [37.75, 26.5], [37.85, 26.75], [37.75, 27.0], [37.97, 27.53]]]]}, "2015-12-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[39.47, 25.53], [40.0, 25.75], [40.25, 25.65], [40.5, 25.75], [41.03, 25.53], [41.25, 25.0], [41.15, 24.75], [41.25, 24.5], [41.03, 23.97], [40.5, 23.75], [40.25, 23.85], [40.0, 23.75], [39.47, 23.97], [39.25, 24.5], [39.35, 24.75], [39.25, 25.0], [39.47, 25.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.10038726414291}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.241360840307913}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.945414897875253, 8.875216556047917, 9.422465855964049, 12.634971283964376]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.945361891472942, 5.489110277141492, 6.0233833385246385, 11.950670761838694]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.543707675535436, -5.894701774194985, -5.384174688141451, -4.2256128819878995]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.859130112708499, -7.03551664254087, -7.10038726414291, -4.43567600299906]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5790457865642822, -1.9887522177665993, -1.7630739536063875, -1.423624480363648]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.921215179722576, -2.4560566605063427, -2.37956399021073, -1.4782264288708244]}}