{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:04:27.163127", "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-31_to_2016-Jan-03_39.5_21.5"}, "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": 2015120000847}, "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 31 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 03 2016"}, "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": 54182.738581582256}, "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": ["Red Sea"]}, "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": 21.5}, "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": 39.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "39.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 37.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 39.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 20.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 24.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-12-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[38.35, 21.75], [38.25, 22.0], [38.47, 22.53], [38.82, 22.68], [38.85, 22.75], [38.8, 22.88], [38.5, 22.75], [37.97, 22.97], [37.75, 23.5], [37.97, 24.03], [38.5, 24.25], [38.8, 24.13], [38.85, 24.25], [38.75, 24.5], [38.97, 25.03], [39.5, 25.25], [40.03, 25.03], [40.25, 24.5], [40.15, 24.25], [40.25, 24.0], [40.15, 23.75], [40.25, 23.5], [40.15, 23.25], [40.25, 23.0], [40.15, 22.75], [40.25, 22.5], [40.15, 22.25], [40.25, 22.0], [40.15, 21.75], [40.25, 21.5], [40.15, 21.25], [40.25, 21.0], [40.15, 20.75], [40.25, 20.5], [40.03, 19.97], [39.5, 19.75], [38.97, 19.97], [38.82, 20.32], [38.47, 20.47], [38.25, 21.0], [38.35, 21.25], [38.25, 21.5], [38.35, 21.75]]]]}, "2016-01-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, 24.0], [37.47, 24.53], [37.82, 24.68], [37.97, 25.03], [38.5, 25.25], [38.75, 25.15], [39.0, 25.25], [39.25, 25.15], [39.5, 25.25], [40.03, 25.03], [40.25, 24.5], [40.15, 24.25], [40.25, 24.0], [40.15, 23.75], [40.25, 23.5], [40.15, 23.25], [40.25, 23.0], [40.15, 22.75], [40.25, 22.5], [40.15, 22.25], [40.25, 22.0], [40.15, 21.75], [40.25, 21.5], [40.15, 21.25], [40.25, 21.0], [40.15, 20.75], [40.25, 20.5], [40.03, 19.97], [39.5, 19.75], [39.25, 19.85], [39.0, 19.75], [38.47, 19.97], [38.25, 20.5], [38.35, 20.75], [38.25, 21.0], [38.35, 21.25], [38.25, 21.5], [38.35, 21.75], [38.25, 22.0], [38.46, 22.5], [38.32, 22.82], [37.97, 22.97], [37.82, 23.32], [37.47, 23.47], [37.25, 24.0]]]]}, "2016-01-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, 24.0], [37.47, 24.53], [37.82, 24.68], [37.97, 25.03], [38.5, 25.25], [38.75, 25.15], [39.0, 25.25], [39.25, 25.15], [39.5, 25.25], [40.03, 25.03], [40.25, 24.5], [40.15, 24.25], [40.25, 24.0], [40.15, 23.75], [40.25, 23.5], [40.15, 23.25], [40.25, 23.0], [40.15, 22.75], [40.25, 22.5], [40.15, 22.25], [40.25, 22.0], [40.15, 21.75], [40.25, 21.5], [40.15, 21.25], [40.25, 21.0], [40.15, 20.75], [40.25, 20.5], [40.03, 19.97], [39.5, 19.75], [39.25, 19.85], [39.0, 19.75], [38.47, 19.97], [38.25, 20.5], [38.35, 20.75], [38.25, 21.0], [38.35, 21.25], [38.25, 21.5], [38.35, 21.75], [38.25, 22.0], [38.46, 22.5], [38.32, 22.82], [37.97, 22.97], [37.82, 23.32], [37.47, 23.47], [37.25, 24.0]]]]}, "2016-01-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[37.25, 24.0], [37.47, 24.53], [37.82, 24.68], [37.97, 25.03], [38.5, 25.25], [38.75, 25.15], [39.0, 25.25], [39.25, 25.15], [39.5, 25.25], [40.03, 25.03], [40.25, 24.5], [40.03, 23.97], [39.63, 23.8], [39.75, 23.5], [39.65, 23.25], [39.75, 23.0], [39.63, 22.7], [40.03, 22.53], [40.25, 22.0], [40.15, 21.75], [40.25, 21.5], [40.15, 21.25], [40.25, 21.0], [40.03, 20.47], [39.68, 20.32], [39.53, 19.97], [39.0, 19.75], [38.47, 19.97], [38.25, 20.5], [38.35, 20.75], [38.25, 21.0], [38.35, 21.25], [38.25, 21.5], [38.47, 22.03], [38.82, 22.18], [38.88, 22.3], [38.47, 22.47], [38.32, 22.82], [37.97, 22.97], [37.82, 23.32], [37.47, 23.47], [37.25, 24.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.654184240616132}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.036366621172843}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.954698780205263, 19.70720001396046, 18.959918460747758, 19.55574807051471]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.819341374336716, 13.629504433966815, 12.98260135190094, 12.497534713965194]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.047773432927854, -2.7685660776952843, -3.3768740377564206, -2.9186959179551897]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.200553579857683, -3.842497116219022, -4.654184240616132, -4.184697390166377]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7200258944931794, -1.5680382204569379, -1.9034800121640088, -1.6290637633508867]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0732380722901436, -1.7981790883442939, -2.30994685180144, -1.9521827717398383]}}