{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:07.100631", "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-Apr-02_to_2011-Apr-04_122.0_34.5"}, "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": 2011040000185}, "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": "April 02 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 04 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": 110307.42750463456}, "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", "Yellow 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": 34.5}, "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": 122.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "122.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 119.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 123.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 36.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, 35.53], [119.5, 35.75], [119.75, 35.65], [120.0, 35.75], [120.53, 35.53], [120.68, 35.18], [120.75, 35.15], [120.82, 35.18], [120.85, 35.25], [120.75, 35.5], [120.97, 36.03], [121.32, 36.18], [121.47, 36.53], [121.82, 36.68], [121.97, 37.03], [122.5, 37.25], [123.03, 37.03], [123.25, 36.5], [123.15, 36.25], [123.25, 36.0], [123.03, 35.47], [122.68, 35.32], [122.65, 35.25], [122.68, 35.18], [122.75, 35.15], [123.0, 35.25], [123.53, 35.03], [123.75, 34.5], [123.65, 34.25], [123.75, 34.0], [123.65, 33.75], [123.75, 33.5], [123.65, 33.25], [123.68, 33.18], [124.03, 33.03], [124.25, 32.5], [124.03, 31.97], [123.5, 31.75], [123.25, 31.85], [123.0, 31.75], [122.75, 31.85], [122.68, 31.82], [122.53, 31.47], [122.0, 31.25], [121.75, 31.35], [121.5, 31.25], [120.97, 31.47], [120.82, 31.82], [120.47, 31.97], [120.32, 32.32], [119.97, 32.47], [119.75, 33.0], [119.85, 33.25], [119.75, 33.5], [119.85, 33.75], [119.82, 33.82], [119.75, 33.85], [119.5, 33.75], [118.97, 33.97], [118.75, 34.5], [118.85, 34.75], [118.75, 35.0], [118.97, 35.53]]]]}, "2011-04-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, 35.53], [119.5, 35.75], [119.75, 35.65], [120.0, 35.75], [120.53, 35.53], [120.68, 35.18], [120.75, 35.15], [120.82, 35.18], [120.85, 35.25], [120.75, 35.5], [120.97, 36.03], [121.32, 36.18], [121.47, 36.53], [121.82, 36.68], [121.97, 37.03], [122.5, 37.25], [123.03, 37.03], [123.25, 36.5], [123.15, 36.25], [123.25, 36.0], [123.03, 35.47], [122.68, 35.32], [122.65, 35.25], [122.68, 35.18], [122.75, 35.15], [123.0, 35.25], [123.53, 35.03], [123.75, 34.5], [123.65, 34.25], [123.75, 34.0], [123.65, 33.75], [123.75, 33.5], [123.65, 33.25], [123.68, 33.18], [124.03, 33.03], [124.25, 32.5], [124.03, 31.97], [123.5, 31.75], [123.25, 31.85], [123.0, 31.75], [122.75, 31.85], [122.68, 31.82], [122.53, 31.47], [122.0, 31.25], [121.75, 31.35], [121.5, 31.25], [120.97, 31.47], [120.82, 31.82], [120.47, 31.97], [120.32, 32.32], [119.97, 32.47], [119.75, 33.0], [119.85, 33.25], [119.75, 33.5], [119.85, 33.75], [119.82, 33.82], [119.75, 33.85], [119.5, 33.75], [118.97, 33.97], [118.75, 34.5], [118.85, 34.75], [118.75, 35.0], [118.97, 35.53]]]]}, "2011-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.97, 35.53], [119.5, 35.75], [119.75, 35.65], [120.0, 35.75], [120.53, 35.53], [120.68, 35.18], [120.75, 35.15], [120.82, 35.18], [120.85, 35.25], [120.75, 35.5], [120.97, 36.03], [121.32, 36.18], [121.47, 36.53], [121.82, 36.68], [121.97, 37.03], [122.5, 37.25], [123.03, 37.03], [123.25, 36.5], [123.15, 36.25], [123.25, 36.0], [123.03, 35.47], [122.68, 35.32], [122.65, 35.25], [122.68, 35.18], [122.75, 35.15], [123.0, 35.25], [123.53, 35.03], [123.75, 34.5], [123.65, 34.25], [123.75, 34.0], [123.65, 33.75], [123.75, 33.5], [123.65, 33.25], [123.68, 33.18], [124.03, 33.03], [124.25, 32.5], [124.03, 31.97], [123.5, 31.75], [123.25, 31.85], [123.0, 31.75], [122.75, 31.85], [122.68, 31.82], [122.53, 31.47], [122.0, 31.25], [121.75, 31.35], [121.5, 31.25], [120.97, 31.47], [120.82, 31.82], [120.47, 31.97], [120.32, 32.32], [119.97, 32.47], [119.75, 33.0], [119.85, 33.25], [119.75, 33.5], [119.85, 33.75], [119.82, 33.82], [119.75, 33.85], [119.5, 33.75], [118.97, 33.97], [118.75, 34.5], [118.85, 34.75], [118.75, 35.0], [118.97, 35.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.796658531362652}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.689287659636067}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.773179180973557, 6.878318759305216, 7.385637854737979]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.167247706324645, 5.315260540384202, 5.532948820456397]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.7964401305777047, -2.8176327675802106, -2.4537900807502853]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.796658531362652, -5.514568555636458, -4.563497931802715]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6782540394953138, -1.6933424206315542, -1.4993495533332692]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.04979614554454, -1.8876202675066749, -1.6950324779343546]}}