{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:54:25.009224", "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": "2013-Sep-23_to_2013-Sep-25_115.5_38.5"}, "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": 2013090001075}, "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": "September 23 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 25 2013"}, "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": 109817.8079565597}, "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": 38.5}, "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": 115.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 111.75}, "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": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2013-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.25, 39.0], [111.47, 39.53], [112.0, 39.75], [112.25, 39.65], [112.5, 39.75], [112.75, 39.65], [113.0, 39.75], [113.25, 39.65], [113.5, 39.75], [114.0, 39.54], [114.5, 39.75], [115.03, 39.53], [115.18, 39.18], [115.25, 39.15], [115.5, 39.25], [116.0, 39.04], [116.5, 39.25], [116.75, 39.15], [117.0, 39.25], [117.25, 39.15], [117.5, 39.25], [118.03, 39.03], [118.18, 38.68], [118.53, 38.53], [118.75, 38.0], [118.53, 37.47], [118.0, 37.25], [117.75, 37.35], [117.68, 37.32], [117.53, 36.97], [117.18, 36.82], [117.03, 36.47], [116.5, 36.25], [116.25, 36.35], [116.18, 36.32], [116.03, 35.97], [115.5, 35.75], [115.25, 35.85], [115.0, 35.75], [114.75, 35.85], [114.5, 35.75], [114.25, 35.85], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.32, 36.82], [113.0, 36.96], [112.5, 36.75], [111.97, 36.97], [111.75, 37.5], [111.85, 37.75], [111.75, 38.0], [111.85, 38.25], [111.82, 38.32], [111.47, 38.47], [111.25, 39.0]]]]}, "2013-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.25, 39.0], [111.47, 39.53], [112.0, 39.75], [112.25, 39.65], [112.5, 39.75], [112.75, 39.65], [113.0, 39.75], [113.25, 39.65], [113.5, 39.75], [114.0, 39.54], [114.5, 39.75], [115.03, 39.53], [115.18, 39.18], [115.25, 39.15], [115.5, 39.25], [116.0, 39.04], [116.5, 39.25], [116.75, 39.15], [117.0, 39.25], [117.25, 39.15], [117.5, 39.25], [118.03, 39.03], [118.18, 38.68], [118.53, 38.53], [118.75, 38.0], [118.53, 37.47], [118.0, 37.25], [117.75, 37.35], [117.68, 37.32], [117.53, 36.97], [117.18, 36.82], [117.03, 36.47], [116.5, 36.25], [116.25, 36.35], [116.18, 36.32], [116.03, 35.97], [115.5, 35.75], [115.25, 35.85], [115.0, 35.75], [114.75, 35.85], [114.5, 35.75], [114.25, 35.85], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.32, 36.82], [113.0, 36.96], [112.5, 36.75], [111.97, 36.97], [111.75, 37.5], [111.85, 37.75], [111.75, 38.0], [111.85, 38.25], [111.82, 38.32], [111.47, 38.47], [111.25, 39.0]]]]}, "2013-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.25, 39.0], [111.47, 39.53], [112.0, 39.75], [112.25, 39.65], [112.5, 39.75], [112.75, 39.65], [113.0, 39.75], [113.25, 39.65], [113.5, 39.75], [114.0, 39.54], [114.5, 39.75], [115.03, 39.53], [115.18, 39.18], [115.25, 39.15], [115.5, 39.25], [116.0, 39.04], [116.5, 39.25], [116.75, 39.15], [117.0, 39.25], [117.25, 39.15], [117.5, 39.25], [118.03, 39.03], [118.18, 38.68], [118.53, 38.53], [118.75, 38.0], [118.53, 37.47], [118.0, 37.25], [117.75, 37.35], [117.68, 37.32], [117.53, 36.97], [117.18, 36.82], [117.03, 36.47], [116.5, 36.25], [116.25, 36.35], [116.18, 36.32], [116.03, 35.97], [115.5, 35.75], [115.25, 35.85], [115.0, 35.75], [114.75, 35.85], [114.5, 35.75], [114.25, 35.85], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.32, 36.82], [113.0, 36.96], [112.5, 36.75], [111.97, 36.97], [111.75, 37.5], [111.85, 37.75], [111.75, 38.0], [111.85, 38.25], [111.82, 38.32], [111.47, 38.47], [111.25, 39.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.40791755011486}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.876998904492878}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.94620140293307, 13.090988345591427, 14.03352760957489]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.166882496701817, 5.268662228264986, 6.541491992014812]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.343890000677854, -5.187529203886078, -4.099577508914709]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.40791755011486, -6.24435082849925, -5.268521181878953]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.194925808862006, -2.163079254791656, -1.72690906355601]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.072322217602132, -2.661210646503365, -2.2394582257850124]}}