{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:03:25.810466", "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-Jul-20_to_2015-Jul-24_116.0_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": 2015070000923}, "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": "July 20 2015"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 24 2015"}, "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": 136582.95674881688}, "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": ["China"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": ["Eastern China Sea", "South China 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": 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": 116.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "116.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 121.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 28.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2015-07-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.97, 25.53], [116.5, 25.75], [116.75, 25.65], [117.0, 25.75], [117.53, 25.53], [117.75, 25.0], [117.65, 24.75], [117.75, 24.5], [117.53, 23.97], [117.0, 23.75], [116.75, 23.85], [116.5, 23.75], [116.25, 23.85], [116.18, 23.82], [116.03, 23.47], [115.5, 23.25], [114.97, 23.47], [114.75, 24.0], [114.97, 24.53], [115.32, 24.68], [115.47, 25.03], [115.82, 25.18], [115.97, 25.53]]], [[[117.97, 28.03], [118.5, 28.25], [118.75, 28.15], [118.82, 28.18], [118.97, 28.53], [119.5, 28.75], [119.75, 28.65], [120.0, 28.75], [120.53, 28.53], [120.75, 28.0], [120.65, 27.75], [120.75, 27.5], [120.65, 27.25], [120.75, 27.0], [120.53, 26.47], [120.0, 26.25], [119.47, 26.47], [119.32, 26.82], [119.25, 26.85], [119.18, 26.82], [119.03, 26.47], [118.68, 26.32], [118.63, 26.2], [118.75, 26.15], [119.0, 26.25], [119.53, 26.03], [119.75, 25.5], [119.53, 24.97], [119.0, 24.75], [118.75, 24.85], [118.5, 24.75], [117.97, 24.97], [117.75, 25.5], [117.88, 25.8], [117.75, 25.85], [117.5, 25.75], [116.97, 25.97], [116.75, 26.5], [116.97, 27.03], [117.32, 27.18], [117.47, 27.53], [117.82, 27.68], [117.97, 28.03]]]]}, "2015-07-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.32, 24.68], [115.35, 24.75], [115.25, 25.0], [115.35, 25.25], [115.25, 25.5], [115.47, 26.03], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [116.75, 26.15], [116.88, 26.2], [116.75, 26.5], [116.97, 27.03], [117.32, 27.18], [117.47, 27.53], [117.82, 27.68], [117.97, 28.03], [118.5, 28.25], [118.75, 28.15], [118.82, 28.18], [118.97, 28.53], [119.5, 28.75], [119.75, 28.65], [120.0, 28.75], [120.53, 28.53], [120.75, 28.0], [120.65, 27.75], [120.75, 27.5], [120.65, 27.25], [120.75, 27.0], [120.53, 26.47], [120.0, 26.25], [119.47, 26.47], [119.32, 26.82], [119.25, 26.85], [119.18, 26.82], [119.03, 26.47], [118.68, 26.32], [118.63, 26.2], [118.75, 26.15], [119.0, 26.25], [119.53, 26.03], [119.75, 25.5], [119.53, 24.97], [119.0, 24.75], [118.75, 24.85], [118.5, 24.75], [117.97, 24.97], [117.75, 25.5], [117.65, 25.25], [117.75, 25.0], [117.65, 24.75], [117.75, 24.5], [117.53, 23.97], [117.18, 23.82], [117.03, 23.47], [116.5, 23.25], [116.25, 23.35], [116.18, 23.32], [116.03, 22.97], [115.5, 22.75], [115.25, 22.85], [115.0, 22.75], [114.47, 22.97], [114.25, 23.5], [114.47, 24.03], [114.82, 24.18], [114.97, 24.53], [115.32, 24.68]], [[117.88, 25.8], [117.75, 25.85], [117.63, 25.8], [117.75, 25.5], [117.88, 25.8]]]]}, "2015-07-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.32, 24.68], [115.35, 24.75], [115.25, 25.0], [115.35, 25.25], [115.25, 25.5], [115.47, 26.03], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [116.75, 26.15], [116.88, 26.2], [116.75, 26.5], [116.97, 27.03], [117.32, 27.18], [117.47, 27.53], [117.82, 27.68], [117.97, 28.03], [118.5, 28.25], [118.75, 28.15], [118.82, 28.18], [118.97, 28.53], [119.5, 28.75], [119.75, 28.65], [120.0, 28.75], [120.53, 28.53], [120.75, 28.0], [120.65, 27.75], [120.7, 27.63], [121.0, 27.75], [121.25, 27.65], [121.5, 27.75], [122.03, 27.53], [122.25, 27.0], [122.15, 26.75], [122.25, 26.5], [122.15, 26.25], [122.25, 26.0], [122.03, 25.47], [121.5, 25.25], [121.25, 25.35], [121.18, 25.32], [121.03, 24.97], [120.68, 24.82], [120.53, 24.47], [120.0, 24.25], [119.75, 24.35], [119.5, 24.25], [119.25, 24.35], [119.0, 24.25], [118.75, 24.35], [118.68, 24.32], [118.53, 23.97], [118.18, 23.82], [118.03, 23.47], [117.5, 23.25], [117.25, 23.35], [117.18, 23.32], [117.03, 22.97], [116.5, 22.75], [116.0, 22.96], [115.5, 22.75], [115.25, 22.85], [115.0, 22.75], [114.47, 22.97], [114.25, 23.5], [114.47, 24.03], [114.82, 24.18], [114.97, 24.53], [115.32, 24.68]], [[117.82, 25.68], [117.88, 25.8], [117.75, 25.85], [117.63, 25.8], [117.68, 25.68], [117.75, 25.65], [117.82, 25.68]], [[119.0, 26.25], [119.25, 26.15], [119.38, 26.2], [119.25, 26.5], [119.35, 26.75], [119.32, 26.82], [119.25, 26.85], [119.18, 26.82], [119.03, 26.47], [118.68, 26.32], [118.63, 26.2], [118.75, 26.15], [119.0, 26.25]]]]}, "2015-07-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 22.97], [114.25, 23.5], [114.47, 24.03], [115.0, 24.25], [115.25, 24.15], [115.32, 24.18], [115.35, 24.25], [115.25, 24.5], [115.35, 24.75], [115.25, 25.0], [115.35, 25.25], [115.25, 25.5], [115.47, 26.03], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [116.75, 26.15], [117.0, 26.25], [117.43, 26.07], [117.25, 26.5], [117.47, 27.03], [118.0, 27.25], [118.53, 27.03], [118.75, 26.5], [118.63, 26.2], [118.75, 26.15], [119.0, 26.25], [119.25, 26.15], [119.38, 26.2], [119.25, 26.5], [119.47, 27.03], [120.0, 27.25], [120.3, 27.13], [120.47, 27.53], [121.0, 27.75], [121.25, 27.65], [121.5, 27.75], [122.03, 27.53], [122.25, 27.0], [122.15, 26.75], [122.25, 26.5], [122.15, 26.25], [122.25, 26.0], [122.03, 25.47], [121.5, 25.25], [121.25, 25.35], [121.18, 25.32], [121.03, 24.97], [120.68, 24.82], [120.53, 24.47], [120.0, 24.25], [119.75, 24.35], [119.5, 24.25], [119.25, 24.35], [119.0, 24.25], [118.75, 24.35], [118.68, 24.32], [118.53, 23.97], [118.18, 23.82], [118.03, 23.47], [117.5, 23.25], [117.25, 23.35], [117.18, 23.32], [117.03, 22.97], [116.5, 22.75], [116.0, 22.96], [115.5, 22.75], [115.25, 22.85], [115.0, 22.75], [114.47, 22.97]], [[117.75, 25.65], [117.82, 25.68], [117.88, 25.8], [117.57, 25.93], [117.68, 25.68], [117.75, 25.65]]]]}, "2015-07-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.47, 22.97], [114.25, 23.5], [114.47, 24.03], [115.0, 24.25], [115.25, 24.15], [115.32, 24.18], [115.35, 24.25], [115.25, 24.5], [115.35, 24.75], [115.25, 25.0], [115.35, 25.25], [115.25, 25.5], [115.47, 26.03], [116.0, 26.25], [116.25, 26.15], [116.5, 26.25], [117.03, 26.03], [117.18, 25.68], [117.25, 25.65], [117.5, 25.75], [117.75, 25.65], [117.82, 25.68], [117.97, 26.03], [118.5, 26.25], [119.0, 26.04], [119.38, 26.2], [119.25, 26.5], [119.47, 27.03], [120.0, 27.25], [120.3, 27.13], [120.47, 27.53], [121.0, 27.75], [121.25, 27.65], [121.5, 27.75], [122.03, 27.53], [122.25, 27.0], [122.15, 26.75], [122.25, 26.5], [122.15, 26.25], [122.25, 26.0], [122.03, 25.47], [121.5, 25.25], [121.25, 25.35], [121.18, 25.32], [121.03, 24.97], [120.68, 24.82], [120.53, 24.47], [120.0, 24.25], [119.75, 24.35], [119.5, 24.25], [119.25, 24.35], [119.0, 24.25], [118.75, 24.35], [118.68, 24.32], [118.53, 23.97], [118.18, 23.82], [118.03, 23.47], [117.5, 23.25], [117.25, 23.35], [117.18, 23.32], [117.03, 22.97], [116.5, 22.75], [116.0, 22.96], [115.5, 22.75], [115.25, 22.85], [115.0, 22.75], [114.47, 22.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -3.9683346484450794}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.1123326733811227}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [25.042510685749278, 24.851464716389785, 25.517653297796187, 25.848965220959712, 25.940763771779302]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [23.51663069026, 23.194392279441047, 23.231759285241026, 23.379812522030136, 23.91909581286353]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.522591864299392, -2.698631982052034, -2.1477670960774464, -1.806758425444569, -1.71949063760705]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.211016586544986, -3.235119686573398, -3.9683346484450794, -2.940386067518091, -3.0471390545004624]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5644387689229442, -1.7378479574559924, -1.739105113401849, -1.6403844845718174, -1.5673060782989305]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9817828235548673, -2.058917114832973, -2.3100151652628274, -1.9812848983300926, -2.0471031785695266]}}