{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:37:12.597061", "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": "2023-Dec-15_to_2023-Dec-19_43.0_18.5"}, "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": 2023120000250}, "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 15 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 19 2023"}, "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": 211842.1313131799}, "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", "Yemen"]}, "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": 18.5}, "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": 43.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "43.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 41.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 49.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 14.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 21.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.75, 20.5], [40.97, 21.03], [41.5, 21.25], [42.03, 21.03], [42.18, 20.68], [42.53, 20.53], [42.68, 20.18], [43.03, 20.03], [43.25, 19.5], [43.15, 19.25], [43.18, 19.18], [43.25, 19.15], [43.5, 19.25], [44.03, 19.03], [44.25, 18.5], [44.15, 18.25], [44.25, 18.0], [44.15, 17.75], [44.18, 17.68], [44.53, 17.53], [44.75, 17.0], [44.53, 16.47], [44.0, 16.25], [43.47, 16.47], [43.32, 16.82], [42.97, 16.97], [42.75, 17.5], [42.85, 17.75], [42.82, 17.82], [42.47, 17.97], [42.32, 18.32], [41.97, 18.47], [41.75, 19.0], [41.85, 19.25], [41.82, 19.32], [41.47, 19.47], [41.32, 19.82], [40.97, 19.97], [40.75, 20.5]]]]}, "2023-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.97, 21.53], [41.5, 21.75], [42.03, 21.53], [42.18, 21.18], [42.25, 21.15], [42.5, 21.25], [43.0, 21.04], [43.5, 21.25], [44.03, 21.03], [44.25, 20.5], [44.15, 20.25], [44.18, 20.18], [44.25, 20.15], [44.32, 20.18], [44.47, 20.53], [45.0, 20.75], [45.53, 20.53], [45.75, 20.0], [45.65, 19.75], [45.75, 19.5], [45.53, 18.97], [45.13, 18.8], [45.25, 18.5], [45.15, 18.25], [45.25, 18.0], [45.15, 17.75], [45.18, 17.68], [45.53, 17.53], [45.68, 17.18], [45.75, 17.15], [46.0, 17.25], [46.25, 17.15], [46.32, 17.18], [46.47, 17.53], [47.0, 17.75], [47.25, 17.65], [47.5, 17.75], [47.75, 17.65], [47.82, 17.68], [47.97, 18.03], [48.5, 18.25], [48.75, 18.15], [49.0, 18.25], [49.53, 18.03], [49.75, 17.5], [49.53, 16.97], [49.18, 16.82], [49.15, 16.75], [49.25, 16.5], [49.03, 15.97], [48.5, 15.75], [48.25, 15.85], [48.0, 15.75], [47.75, 15.85], [47.5, 15.75], [47.25, 15.85], [47.0, 15.75], [46.75, 15.85], [46.68, 15.82], [46.53, 15.47], [46.0, 15.25], [46.25, 15.15], [46.5, 15.25], [47.03, 15.03], [47.25, 14.5], [47.03, 13.97], [46.5, 13.75], [46.25, 13.85], [46.0, 13.75], [45.75, 13.85], [45.5, 13.75], [44.97, 13.97], [44.82, 14.32], [44.47, 14.47], [44.32, 14.82], [43.97, 14.97], [43.82, 15.32], [43.47, 15.47], [43.25, 16.0], [43.35, 16.25], [43.32, 16.32], [42.97, 16.47], [42.75, 17.0], [42.85, 17.25], [42.75, 17.5], [42.85, 17.75], [42.82, 17.82], [42.75, 17.85], [42.5, 17.75], [41.97, 17.97], [41.75, 18.5], [41.85, 18.75], [41.75, 19.0], [41.85, 19.25], [41.82, 19.32], [41.47, 19.47], [41.32, 19.82], [40.97, 19.97], [40.75, 20.5], [40.85, 20.75], [40.75, 21.0], [40.97, 21.53]], [[45.75, 15.35], [45.68, 15.32], [45.65, 15.25], [45.68, 15.18], [45.75, 15.15], [46.0, 15.25], [45.75, 15.35]]]]}, "2023-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.97, 21.53], [41.5, 21.75], [42.03, 21.53], [42.18, 21.18], [42.25, 21.15], [42.32, 21.18], [42.47, 21.53], [43.0, 21.75], [43.53, 21.53], [43.68, 21.18], [44.03, 21.03], [44.25, 20.5], [44.15, 20.25], [44.18, 20.18], [44.25, 20.15], [44.32, 20.18], [44.47, 20.53], [45.0, 20.75], [45.53, 20.53], [45.75, 20.0], [45.65, 19.75], [45.75, 19.5], [45.65, 19.25], [45.75, 19.0], [45.65, 18.75], [45.68, 18.68], [45.75, 18.65], [46.0, 18.75], [46.53, 18.53], [46.75, 18.0], [46.57, 17.57], [47.0, 17.75], [47.25, 17.65], [47.5, 17.75], [47.75, 17.65], [47.82, 17.68], [47.97, 18.03], [48.5, 18.25], [48.75, 18.15], [49.0, 18.25], [49.53, 18.03], [49.75, 17.5], [49.53, 16.97], [49.18, 16.82], [49.15, 16.75], [49.25, 16.5], [49.03, 15.97], [48.5, 15.75], [48.25, 15.85], [48.0, 15.75], [47.75, 15.85], [47.63, 15.8], [47.75, 15.5], [47.53, 14.97], [47.13, 14.8], [47.25, 14.5], [47.03, 13.97], [46.5, 13.75], [46.25, 13.85], [46.0, 13.75], [45.75, 13.85], [45.5, 13.75], [44.97, 13.97], [44.82, 14.32], [44.47, 14.47], [44.32, 14.82], [43.97, 14.97], [43.82, 15.32], [43.47, 15.47], [43.25, 16.0], [43.35, 16.25], [43.32, 16.32], [42.97, 16.47], [42.75, 17.0], [42.85, 17.25], [42.75, 17.5], [42.85, 17.75], [42.82, 17.82], [42.75, 17.85], [42.5, 17.75], [41.97, 17.97], [41.75, 18.5], [41.85, 18.75], [41.75, 19.0], [41.85, 19.25], [41.82, 19.32], [41.47, 19.47], [41.32, 19.82], [40.97, 19.97], [40.75, 20.5], [40.85, 20.75], [40.75, 21.0], [40.97, 21.53]], [[46.32, 17.18], [46.43, 17.43], [46.18, 17.32], [46.13, 17.2], [46.25, 17.15], [46.32, 17.18]]]]}, "2023-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[40.97, 21.53], [41.5, 21.75], [42.03, 21.53], [42.18, 21.18], [42.25, 21.15], [42.32, 21.18], [42.47, 21.53], [43.0, 21.75], [43.53, 21.53], [43.68, 21.18], [44.03, 21.03], [44.25, 20.5], [44.15, 20.25], [44.18, 20.18], [44.25, 20.15], [44.32, 20.18], [44.47, 20.53], [45.0, 20.75], [45.53, 20.53], [45.75, 20.0], [45.65, 19.75], [45.75, 19.5], [45.65, 19.25], [45.75, 19.0], [45.65, 18.75], [45.68, 18.68], [45.75, 18.65], [46.0, 18.75], [46.53, 18.53], [46.75, 18.0], [46.57, 17.57], [47.0, 17.75], [47.25, 17.65], [47.5, 17.75], [47.75, 17.65], [47.82, 17.68], [47.97, 18.03], [48.5, 18.25], [48.75, 18.15], [49.0, 18.25], [49.53, 18.03], [49.75, 17.5], [49.53, 16.97], [49.18, 16.82], [49.15, 16.75], [49.25, 16.5], [49.03, 15.97], [48.5, 15.75], [48.25, 15.85], [48.0, 15.75], [47.75, 15.85], [47.63, 15.8], [47.75, 15.5], [47.53, 14.97], [47.13, 14.8], [47.25, 14.5], [47.03, 13.97], [46.5, 13.75], [46.25, 13.85], [46.0, 13.75], [45.75, 13.85], [45.5, 13.75], [44.97, 13.97], [44.82, 14.32], [44.47, 14.47], [44.32, 14.82], [43.97, 14.97], [43.82, 15.32], [43.47, 15.47], [43.25, 16.0], [43.35, 16.25], [43.32, 16.32], [42.97, 16.47], [42.75, 17.0], [42.85, 17.25], [42.75, 17.5], [42.85, 17.75], [42.82, 17.82], [42.75, 17.85], [42.5, 17.75], [41.97, 17.97], [41.75, 18.5], [41.85, 18.75], [41.75, 19.0], [41.85, 19.25], [41.82, 19.32], [41.47, 19.47], [41.32, 19.82], [40.97, 19.97], [40.75, 20.5], [40.85, 20.75], [40.75, 21.0], [40.97, 21.53]], [[46.32, 17.18], [46.43, 17.43], [46.18, 17.32], [46.13, 17.2], [46.25, 17.15], [46.32, 17.18]]]]}, "2023-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[46.0, 16.75], [46.25, 16.65], [46.5, 16.75], [47.03, 16.53], [47.18, 16.18], [47.53, 16.03], [47.75, 15.5], [47.53, 14.97], [47.0, 14.75], [46.75, 14.85], [46.5, 14.75], [46.25, 14.85], [46.0, 14.75], [45.47, 14.97], [45.25, 15.5], [45.35, 15.75], [45.25, 16.0], [45.47, 16.53], [46.0, 16.75]]], [[[42.25, 20.0], [42.35, 20.25], [42.25, 20.5], [42.35, 20.75], [42.25, 21.0], [42.47, 21.53], [43.0, 21.75], [43.53, 21.53], [43.68, 21.18], [44.03, 21.03], [44.25, 20.5], [44.15, 20.25], [44.25, 20.0], [44.15, 19.75], [44.25, 19.5], [44.07, 19.07], [44.32, 19.18], [44.47, 19.53], [45.0, 19.75], [45.53, 19.53], [45.75, 19.0], [45.65, 18.75], [45.68, 18.68], [45.75, 18.65], [46.0, 18.75], [46.53, 18.53], [46.75, 18.0], [46.53, 17.47], [46.18, 17.32], [46.03, 16.97], [45.5, 16.75], [45.0, 16.96], [44.5, 16.75], [43.97, 16.97], [43.75, 17.5], [43.85, 17.75], [43.75, 18.0], [43.85, 18.25], [43.75, 18.5], [43.93, 18.93], [43.68, 18.82], [43.53, 18.47], [43.0, 18.25], [42.47, 18.47], [42.25, 19.0], [42.35, 19.25], [42.25, 19.5], [42.35, 19.75], [42.25, 20.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.5647372091247576}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.160898885852344}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.573494559494918, 13.94496998424512, 13.053105820602866, 13.429809746026535, 14.719385539831137]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.224041215661089, 10.012524140489461, 9.463582681217702, 10.541539561259981, 13.148576046155313]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.5788814192824754, -3.7934469784332965, -4.754590374784309, -4.292622703985768, -3.419128478375331]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.011170191058852, -4.802176515460133, -6.5647372091247576, -6.06055267454127, -3.7580806990659426]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5961512432691312, -1.7395083713902266, -2.1374534351644017, -1.9321522184454665, -1.4391298356366633]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7509482480247005, -2.80623025007931, -3.2718535351277414, -2.4819726915599167, -1.613940853264642]}}