{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:50:47.638195", "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": "2024-Jan-21_to_2024-Jan-23_117.0_35.5"}, "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": 2024010000556}, "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": "January 21 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 23 2024"}, "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": 64872.507625820355}, "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": []}, "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": 35.5}, "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": 117.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 37.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, 36.0], [113.97, 36.53], [114.32, 36.68], [114.47, 37.03], [114.82, 37.18], [114.85, 37.25], [114.75, 37.5], [114.97, 38.03], [115.5, 38.25], [116.03, 38.03], [116.18, 37.68], [116.25, 37.65], [116.5, 37.75], [116.75, 37.65], [117.0, 37.75], [117.53, 37.53], [117.68, 37.18], [118.03, 37.03], [118.18, 36.68], [118.53, 36.53], [118.75, 36.0], [118.53, 35.47], [118.18, 35.32], [118.03, 34.97], [117.5, 34.75], [117.25, 34.85], [117.0, 34.75], [116.75, 34.85], [116.5, 34.75], [116.25, 34.85], [116.18, 34.82], [116.03, 34.47], [115.5, 34.25], [114.97, 34.47], [114.82, 34.82], [114.47, 34.97], [114.32, 35.32], [113.97, 35.47], [113.75, 36.0]]]]}, "2024-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, 36.0], [113.97, 36.53], [114.32, 36.68], [114.47, 37.03], [114.82, 37.18], [114.85, 37.25], [114.75, 37.5], [114.97, 38.03], [115.5, 38.25], [116.03, 38.03], [116.18, 37.68], [116.25, 37.65], [116.5, 37.75], [116.75, 37.65], [117.0, 37.75], [117.53, 37.53], [117.68, 37.18], [118.03, 37.03], [118.18, 36.68], [118.53, 36.53], [118.75, 36.0], [118.53, 35.47], [118.18, 35.32], [118.03, 34.97], [117.5, 34.75], [117.25, 34.85], [117.0, 34.75], [116.75, 34.85], [116.5, 34.75], [116.25, 34.85], [116.18, 34.82], [116.03, 34.47], [115.5, 34.25], [114.97, 34.47], [114.82, 34.82], [114.47, 34.97], [114.32, 35.32], [113.97, 35.47], [113.75, 36.0]]]]}, "2024-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.75, 36.0], [113.97, 36.53], [114.32, 36.68], [114.47, 37.03], [114.82, 37.18], [114.85, 37.25], [114.75, 37.5], [114.97, 38.03], [115.5, 38.25], [116.03, 38.03], [116.18, 37.68], [116.25, 37.65], [116.5, 37.75], [116.75, 37.65], [117.0, 37.75], [117.53, 37.53], [117.68, 37.18], [118.03, 37.03], [118.18, 36.68], [118.53, 36.53], [118.75, 36.0], [118.53, 35.47], [118.18, 35.32], [118.03, 34.97], [117.5, 34.75], [117.25, 34.85], [117.0, 34.75], [116.75, 34.85], [116.5, 34.75], [116.25, 34.85], [116.18, 34.82], [116.03, 34.47], [115.5, 34.25], [114.97, 34.47], [114.82, 34.82], [114.47, 34.97], [114.32, 35.32], [113.97, 35.47], [113.75, 36.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.8492630931093}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.30275914491787}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-5.472082345348042, -7.332785945735509, -4.953706544877207]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.6925053103557275, -9.962839141506151, -6.543736065984831]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.747572259616058, -6.7219575372886045, -4.438747637848947]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.532641167631198, -7.8492630931093, -5.213063384151667]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5968416478200058, -2.2679331373831273, -1.5287085391835311]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0126911389836777, -2.456008051971127, -1.7763846849987135]}}