{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:15.276425", "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": "2017-Feb-22_to_2017-Feb-25_117.0_25.5"}, "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": 2017020000600}, "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": "February 22 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 25 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 117895.29828529248}, "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": 25.5}, "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": 110.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 21.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.5, 26.75], [114.03, 26.53], [114.25, 26.0], [114.03, 25.47], [113.5, 25.25], [112.97, 25.47], [112.75, 26.0], [112.97, 26.53], [113.5, 26.75]]]]}, "2017-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.85, 22.75], [109.75, 23.0], [109.97, 23.53], [110.5, 23.75], [110.75, 23.65], [110.82, 23.68], [110.97, 24.03], [111.32, 24.18], [111.35, 24.25], [111.25, 24.5], [111.47, 25.03], [112.0, 25.25], [112.25, 25.15], [112.5, 25.25], [112.75, 25.15], [112.82, 25.18], [112.96, 25.5], [112.75, 26.0], [112.97, 26.53], [113.5, 26.75], [114.03, 26.53], [114.18, 26.18], [114.53, 26.03], [114.75, 25.5], [114.97, 26.03], [115.5, 26.25], [115.75, 26.15], [116.0, 26.25], [116.25, 26.15], [116.32, 26.18], [116.47, 26.53], [116.82, 26.68], [116.97, 27.03], [117.32, 27.18], [117.47, 27.53], [118.0, 27.75], [118.25, 27.65], [118.5, 27.75], [119.03, 27.53], [119.25, 27.0], [119.15, 26.75], [119.25, 26.5], [119.03, 25.97], [118.68, 25.82], [118.53, 25.47], [118.18, 25.32], [118.03, 24.97], [117.68, 24.82], [117.53, 24.47], [117.18, 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6.759109859376451, 5.892152269051564, 6.612942259216709]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.4256049649497413, 3.3468218052468046, 3.4056520498290865, 4.561549792449966]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.4280219824944425, -6.71281621212546, -7.825943369025341, -7.355624339552673]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.4280219824944425, -7.584022040460866, -9.047721331252149, -8.336033016543297]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.320696816593821, -1.424723969874278, -1.6492260778873797, -1.528427333726695]}, "anom_scaled_evo_maxamp": {"name": "Evolution of 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