{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:56.058669", "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-Nov-29_to_2011-Dec-04_113.5_36.5"}, "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": 2011110001335}, "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": "November 29 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 04 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 69405.20811934408}, "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": 36.5}, "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": 113.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "113.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 112.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 38.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-11-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.75, 37.5], [112.85, 37.75], [112.75, 38.0], [112.97, 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36.03], [112.32, 36.18], [112.35, 36.25], [112.25, 36.5]]]]}, "2011-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.25, 36.5], [112.47, 37.03], [112.88, 37.2], [112.75, 37.5], [112.85, 37.75], [112.75, 38.0], [112.85, 38.25], [112.75, 38.5], [112.97, 39.03], [113.5, 39.25], [114.03, 39.03], [114.18, 38.68], [114.25, 38.65], [114.5, 38.75], [115.03, 38.53], [115.18, 38.18], [115.53, 38.03], [115.68, 37.68], [116.03, 37.53], [116.25, 37.0], [116.15, 36.75], [116.25, 36.5], [116.03, 35.97], [115.68, 35.82], [115.65, 35.75], [115.75, 35.5], [115.53, 34.97], [115.0, 34.75], [114.75, 34.85], [114.5, 34.75], [114.25, 34.85], [114.0, 34.75], [113.75, 34.85], [113.5, 34.75], [113.0, 34.96], [112.5, 34.75], [111.97, 34.97], [111.75, 35.5], [111.97, 36.03], [112.32, 36.18], [112.35, 36.25], [112.25, 36.5]]]]}, "2011-12-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.47, 37.03], [112.88, 37.2], [112.75, 37.5], [112.85, 37.75], [112.75, 38.0], 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anomaly over entire duration", "value": -5.4788044945910945}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-2.045673962659123, -4.835863069557206, -3.8846143363327883, -3.8301207043473937, -3.790260057754381, -5.714346162362517]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.668324044956819, -8.988398545055588, -8.026016348248561, -8.747111977867746, -7.5039680974309135, -5.919431589265741]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.8792383888904594, -6.762038839172275, -5.645063314708013, -5.30417173295593, -4.527690712826999, -4.988396468940294]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.271595681047245, -8.811203231571653, -8.268030153479401, 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