{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:50:47.644818", "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_119.5_35.0"}, "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": 2024010000555}, "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": 72942.98936608681}, "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": ["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": 35.0}, "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": 119.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "119.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 118.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 123.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.25}, "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": {"2024-01-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.47, 36.03], [119.0, 36.25], [119.25, 36.15], [119.32, 36.18], [119.47, 36.53], [120.0, 36.75], [120.25, 36.65], [120.32, 36.68], [120.47, 37.03], [121.0, 37.25], [121.25, 37.15], [121.5, 37.25], [121.75, 37.15], [122.0, 37.25], [122.25, 37.15], [122.5, 37.25], [123.03, 37.03], [123.18, 36.68], [123.53, 36.53], [123.75, 36.0], [123.53, 35.47], [123.18, 35.32], [123.03, 34.97], [122.68, 34.82], [122.53, 34.47], [122.0, 34.25], [121.75, 34.35], [121.68, 34.32], [121.53, 33.97], [121.0, 33.75], [120.75, 33.85], [120.5, 33.75], [120.25, 33.85], [120.0, 33.75], [119.47, 33.97], [119.32, 34.32], [119.25, 34.35], [119.0, 34.25], [118.47, 34.47], [118.25, 35.0], [118.35, 35.25], [118.25, 35.5], [118.47, 36.03]]]]}, "2024-01-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.47, 36.03], [119.0, 36.25], [119.25, 36.15], [119.32, 36.18], [119.47, 36.53], [120.0, 36.75], [120.25, 36.65], [120.32, 36.68], [120.47, 37.03], [121.0, 37.25], [121.25, 37.15], [121.5, 37.25], [121.75, 37.15], [122.0, 37.25], [122.25, 37.15], [122.5, 37.25], [123.03, 37.03], [123.18, 36.68], [123.53, 36.53], [123.75, 36.0], [123.53, 35.47], [123.18, 35.32], [123.03, 34.97], [122.68, 34.82], [122.53, 34.47], [122.0, 34.25], [121.75, 34.35], [121.68, 34.32], [121.53, 33.97], [121.0, 33.75], [120.75, 33.85], [120.5, 33.75], [120.25, 33.85], [120.0, 33.75], [119.47, 33.97], [119.32, 34.32], [119.25, 34.35], [119.0, 34.25], [118.47, 34.47], [118.25, 35.0], [118.35, 35.25], [118.25, 35.5], [118.47, 36.03]]]]}, "2024-01-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[118.47, 36.03], [119.0, 36.25], [119.25, 36.15], [119.32, 36.18], [119.47, 36.53], [120.0, 36.75], [120.25, 36.65], [120.32, 36.68], [120.47, 37.03], [121.0, 37.25], [121.25, 37.15], [121.5, 37.25], [121.75, 37.15], [122.0, 37.25], [122.25, 37.15], [122.5, 37.25], [123.03, 37.03], [123.18, 36.68], [123.53, 36.53], [123.75, 36.0], [123.53, 35.47], [123.18, 35.32], [123.03, 34.97], [122.68, 34.82], [122.53, 34.47], [122.0, 34.25], [121.75, 34.35], [121.68, 34.32], [121.53, 33.97], [121.0, 33.75], [120.75, 33.85], [120.5, 33.75], [120.25, 33.85], [120.0, 33.75], [119.47, 33.97], [119.32, 34.32], [119.25, 34.35], [119.0, 34.25], [118.47, 34.47], [118.25, 35.0], [118.35, 35.25], [118.25, 35.5], [118.47, 36.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.594935087615852}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.95443955815415}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.143959942774927, -4.098082030701335, -1.9817285733847143]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.607108877194662, -8.841274554726624, -5.581057534264289]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.346385403630065, -6.319816811273521, -4.197116459558864]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.97473639489823, -7.594935087615852, -4.591444911510962]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.638195802717157, -2.4036466604653923, -1.6248284287512254]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9095590784913146, -2.902535972168346, -1.9770580481667221]}}