{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:35.124546", "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": "2012-Feb-08_to_2012-Feb-12_104.0_30.5"}, "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": 2012020000553}, "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 08 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 12 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 465351.9871644524}, "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": 30.5}, "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": 104.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "104.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 102.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 115.25}, "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": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.25, 24.15], [112.5, 24.25], [113.03, 24.03], [113.18, 23.68], [113.53, 23.53], [113.75, 23.0], [113.53, 22.47], [113.0, 22.25], [112.75, 22.35], [112.5, 22.25], [112.25, 22.35], [112.0, 22.25], [111.75, 22.35], [111.5, 22.25], [110.97, 22.47], [110.75, 23.0], [110.97, 23.53], [111.32, 23.68], [111.47, 24.03], [112.0, 24.25], [112.25, 24.15]]], [[[113.97, 27.03], [114.5, 27.25], [114.75, 27.15], [115.0, 27.25], [115.53, 27.03], [115.75, 26.5], [115.53, 25.97], [115.0, 25.75], [114.75, 25.85], [114.5, 25.75], [113.97, 25.97], [113.75, 26.5], [113.97, 27.03]]], [[[103.5, 31.75], [103.75, 31.65], [103.82, 31.68], [103.97, 32.03], [104.32, 32.18], [104.47, 32.53], [105.0, 32.75], [105.53, 32.53], [105.68, 32.18], [105.75, 32.15], [106.0, 32.25], [106.53, 32.03], [106.75, 31.5], [106.53, 30.97], [106.18, 30.82], [106.03, 30.47], [105.68, 30.32], [105.65, 30.25], [105.75, 30.0], [105.65, 29.75], [105.68, 29.68], [105.75, 29.65], [106.0, 29.75], [106.25, 29.65], [106.32, 29.68], [106.35, 29.75], [106.25, 30.0], [106.47, 30.53], [107.0, 30.75], [107.25, 30.65], [107.5, 30.75], [107.75, 30.65], [107.82, 30.68], [107.97, 31.03], [108.5, 31.25], [108.75, 31.15], [109.0, 31.25], [109.53, 31.03], [109.68, 30.68], [110.03, 30.53], [110.25, 30.0], [110.15, 29.75], [110.25, 29.5], [110.03, 28.97], [109.5, 28.75], [109.25, 28.85], [109.18, 28.82], [109.03, 28.47], [108.68, 28.32], [108.54, 28.0], [108.75, 27.5], [108.65, 27.25], [108.68, 27.18], [109.03, 27.03], [109.25, 26.5], [109.15, 26.25], [109.25, 26.0], [109.03, 25.47], [108.68, 25.32], [108.53, 24.97], [108.18, 24.82], [108.03, 24.47], [107.5, 24.25], [107.25, 24.35], [107.0, 24.25], [106.47, 24.47], [106.25, 25.0], [106.35, 25.25], [106.32, 25.32], [105.97, 25.47], [105.75, 26.0], [105.88, 26.3], [105.47, 26.47], [105.32, 26.82], [104.97, 26.97], [104.82, 27.32], [104.75, 27.35], [104.5, 27.25], [104.25, 27.35], [104.0, 27.25], [103.47, 27.47], [103.32, 27.82], [102.97, 27.97], [102.75, 28.5], [102.85, 28.75], [102.75, 29.0], [102.85, 29.25], [102.82, 29.32], [102.75, 29.35], [102.5, 29.25], [101.97, 29.47], [101.75, 30.0], [101.97, 30.53], [102.32, 30.68], [102.47, 31.03], [102.82, 31.18], [102.97, 31.53], [103.5, 31.75]]]]}, "2012-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 30.53], [102.32, 30.68], [102.47, 31.03], [102.82, 31.18], [102.97, 31.53], [103.32, 31.68], [103.47, 32.03], [103.82, 32.18], [103.97, 32.53], [104.5, 32.75], [104.75, 32.65], [105.0, 32.75], [105.3, 32.63], [105.47, 33.03], [106.0, 33.25], [106.53, 33.03], [106.68, 32.68], [107.03, 32.53], [107.25, 32.0], [107.03, 31.47], [106.68, 31.32], [106.53, 30.97], [106.18, 30.82], [106.03, 30.47], [105.68, 30.32], [105.65, 30.25], [105.75, 30.0], [105.65, 29.75], [105.68, 29.68], [105.75, 29.65], [106.0, 29.75], [106.25, 29.65], [106.32, 29.68], [106.35, 29.75], [106.25, 30.0], [106.47, 30.53], [107.0, 30.75], [107.25, 30.65], [107.5, 30.75], [107.75, 30.65], [107.82, 30.68], [107.97, 31.03], [108.5, 31.25], [108.75, 31.15], [109.0, 31.25], [109.53, 31.03], [109.68, 30.68], [110.03, 30.53], [110.25, 30.0], [110.15, 29.75], [110.25, 29.5], [110.03, 28.97], [109.5, 28.75], [109.25, 28.85], [109.18, 28.82], [109.03, 28.47], [108.68, 28.32], [108.54, 28.0], [108.75, 27.5], [108.65, 27.25], [108.68, 27.18], [109.03, 27.03], [109.25, 26.5], [109.15, 26.25], [109.25, 26.0], [109.13, 25.7], [109.5, 25.54], [110.0, 25.75], [110.25, 25.65], [110.5, 25.75], [111.03, 25.53], [111.25, 25.0], [111.15, 24.75], [111.18, 24.68], [111.5, 24.54], [112.0, 24.75], [112.25, 24.65], [112.32, 24.68], [112.47, 25.03], [112.82, 25.18], [112.97, 25.53], [113.32, 25.68], [113.47, 26.03], [113.82, 26.18], [113.85, 26.25], [113.75, 26.5], [113.97, 27.03], [114.5, 27.25], [114.75, 27.15], [115.0, 27.25], [115.53, 27.03], [115.75, 26.5], [115.53, 25.97], [115.18, 25.82], [115.15, 25.75], [115.25, 25.5], [115.03, 24.97], [114.68, 24.82], [114.53, 24.47], [114.18, 24.32], [114.15, 24.25], [114.25, 24.0], [114.15, 23.75], [114.25, 23.5], [114.03, 22.97], [113.68, 22.82], [113.53, 22.47], [113.0, 22.25], [112.75, 22.35], [112.5, 22.25], [112.25, 22.35], [112.0, 22.25], [111.75, 22.35], [111.5, 22.25], [111.25, 22.35], [111.0, 22.25], [110.75, 22.35], [110.68, 22.32], [110.53, 21.97], [110.0, 21.75], [109.75, 21.85], [109.5, 21.75], [109.25, 21.85], [109.18, 21.82], [109.03, 21.47], [108.5, 21.25], [107.97, 21.47], [107.82, 21.82], [107.75, 21.85], [107.5, 21.75], [107.25, 21.85], [107.0, 21.75], [106.47, 21.97], [106.25, 22.5], [106.47, 23.03], [106.82, 23.18], [106.85, 23.25], [106.82, 23.32], [106.47, 23.47], [106.25, 24.0], [106.35, 24.25], [106.25, 24.5], [106.35, 24.75], [106.25, 25.0], [106.35, 25.25], [106.32, 25.32], [105.97, 25.47], [105.75, 26.0], [105.88, 26.3], [105.47, 26.47], [105.32, 26.82], [104.97, 26.97], [104.82, 27.32], [104.75, 27.35], [104.5, 27.25], [104.25, 27.35], [104.0, 27.25], [103.47, 27.47], [103.32, 27.82], [102.97, 27.97], [102.82, 28.32], [102.47, 28.47], [102.32, 28.82], [101.97, 28.97], [101.75, 29.5], [101.85, 29.75], [101.75, 30.0], [101.97, 30.53]]]]}, "2012-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[101.97, 30.53], [102.32, 30.68], [102.47, 31.03], [102.82, 31.18], [102.97, 31.53], [103.32, 31.68], [103.47, 32.03], [103.82, 32.18], [103.97, 32.53], [104.5, 32.75], [104.75, 32.65], [105.0, 32.75], [105.3, 32.63], [105.47, 33.03], [106.0, 33.25], [106.53, 33.03], [106.68, 32.68], [107.03, 32.53], [107.25, 32.0], [107.03, 31.47], [106.68, 31.32], [106.53, 30.97], [106.18, 30.82], [106.03, 30.47], [105.68, 30.32], [105.65, 30.25], [105.75, 30.0], [105.65, 29.75], [105.68, 29.68], [105.75, 29.65], [106.0, 29.75], [106.25, 29.65], [106.32, 29.68], [106.35, 29.75], [106.25, 30.0], [106.47, 30.53], [107.0, 30.75], [107.25, 30.65], [107.5, 30.75], [107.75, 30.65], [107.82, 30.68], [107.97, 31.03], [108.5, 31.25], [108.75, 31.15], [109.0, 31.25], [109.53, 31.03], [109.68, 30.68], [110.03, 30.53], [110.25, 30.0], [110.15, 29.75], [110.25, 29.5], [110.03, 28.97], [109.5, 28.75], [109.25, 28.85], [109.18, 28.82], [109.03, 28.47], [108.68, 28.32], [108.54, 28.0], [108.75, 27.5], [108.65, 27.25], [108.68, 27.18], [109.03, 27.03], [109.25, 26.5], [109.15, 26.25], [109.25, 26.0], [109.13, 25.7], [109.5, 25.54], [110.0, 25.75], [110.25, 25.65], [110.5, 25.75], [111.03, 25.53], [111.25, 25.0], [111.15, 24.75], [111.18, 24.68], [111.5, 24.54], [112.0, 24.75], [112.25, 24.65], [112.32, 24.68], [112.47, 25.03], [112.82, 25.18], [112.97, 25.53], [113.32, 25.68], [113.47, 26.03], [113.82, 26.18], [113.85, 26.25], [113.75, 26.5], [113.97, 27.03], [114.5, 27.25], [114.75, 27.15], [115.0, 27.25], [115.53, 27.03], [115.75, 26.5], [115.53, 25.97], [115.18, 25.82], [115.15, 25.75], [115.25, 25.5], [115.03, 24.97], [114.68, 24.82], [114.53, 24.47], [114.18, 24.32], [114.15, 24.25], [114.25, 24.0], [114.15, 23.75], [114.25, 23.5], [114.03, 22.97], [113.68, 22.82], [113.53, 22.47], [113.0, 22.25], [112.75, 22.35], [112.5, 22.25], [112.25, 22.35], [112.0, 22.25], [111.75, 22.35], [111.5, 22.25], [111.25, 22.35], [111.0, 22.25], [110.75, 22.35], [110.68, 22.32], [110.53, 21.97], [110.0, 21.75], [109.75, 21.85], [109.5, 21.75], [109.25, 21.85], [109.18, 21.82], [109.03, 21.47], [108.5, 21.25], [107.97, 21.47], [107.82, 21.82], [107.75, 21.85], [107.5, 21.75], [107.25, 21.85], [107.0, 21.75], [106.47, 21.97], [106.25, 22.5], [106.47, 23.03], [106.82, 23.18], [106.85, 23.25], [106.82, 23.32], [106.47, 23.47], [106.25, 24.0], [106.35, 24.25], [106.25, 24.5], [106.35, 24.75], [106.25, 25.0], [106.35, 25.25], [106.32, 25.32], [105.97, 25.47], [105.75, 26.0], [105.88, 26.3], [105.47, 26.47], [105.32, 26.82], [104.97, 26.97], [104.82, 27.32], [104.75, 27.35], [104.5, 27.25], [104.25, 27.35], [104.0, 27.25], [103.47, 27.47], [103.32, 27.82], [102.97, 27.97], [102.82, 28.32], [102.47, 28.47], [102.32, 28.82], [101.97, 28.97], [101.75, 29.5], [101.85, 29.75], [101.75, 30.0], [101.97, 30.53]]]]}, "2012-02-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[106.25, 25.0], [106.47, 25.53], [107.0, 25.75], [107.25, 25.65], [107.5, 25.75], [107.75, 25.65], [108.0, 25.75], [108.25, 25.65], [108.5, 25.75], [108.75, 25.65], [109.0, 25.75], [109.5, 25.54], [110.0, 25.75], [110.25, 25.65], [110.5, 25.75], [111.03, 25.53], [111.25, 25.0], [111.15, 24.75], [111.18, 24.68], [111.5, 24.54], [112.0, 24.75], [112.25, 24.65], [112.32, 24.68], [112.47, 25.03], [112.82, 25.18], [112.97, 25.53], [113.32, 25.68], [113.47, 26.03], [113.82, 26.18], [113.97, 26.53], [114.5, 26.75], [115.03, 26.53], [115.25, 26.0], [115.15, 25.75], [115.25, 25.5], [115.03, 24.97], [114.68, 24.82], [114.53, 24.47], [114.18, 24.32], [114.15, 24.25], [114.25, 24.0], [114.15, 23.75], [114.25, 23.5], [114.03, 22.97], [113.68, 22.82], [113.53, 22.47], [113.0, 22.25], [112.75, 22.35], [112.5, 22.25], [112.25, 22.35], [112.0, 22.25], [111.75, 22.35], [111.5, 22.25], [111.25, 22.35], [111.0, 22.25], [110.75, 22.35], [110.68, 22.32], [110.53, 21.97], [110.0, 21.75], [109.75, 21.85], [109.5, 21.75], [109.25, 21.85], [109.18, 21.82], [109.03, 21.47], [108.5, 21.25], [107.97, 21.47], [107.82, 21.82], [107.75, 21.85], [107.5, 21.75], [107.25, 21.85], [107.0, 21.75], [106.47, 21.97], [106.25, 22.5], [106.47, 23.03], [106.82, 23.18], [106.85, 23.25], [106.82, 23.32], [106.47, 23.47], [106.25, 24.0], [106.35, 24.25], [106.25, 24.5], [106.35, 24.75], [106.25, 25.0]]], [[[106.25, 28.0], [106.47, 28.53], [107.0, 28.75], [107.53, 28.53], [107.75, 28.0], [107.53, 27.47], [107.0, 27.25], [106.47, 27.47], [106.25, 28.0]]], [[[102.47, 31.03], [102.82, 31.18], [102.97, 31.53], [103.32, 31.68], [103.47, 32.03], [103.82, 32.18], [103.97, 32.53], [104.5, 32.75], [104.75, 32.65], [105.0, 32.75], [105.3, 32.63], [105.47, 33.03], [106.0, 33.25], [106.53, 33.03], [106.68, 32.68], [107.03, 32.53], [107.25, 32.0], [107.03, 31.47], [106.5, 31.25], [106.25, 31.35], [106.18, 31.32], [106.03, 30.97], [105.68, 30.82], [105.53, 30.47], [105.0, 30.25], [104.75, 30.35], [104.68, 30.32], [104.65, 30.25], [104.75, 30.0], [104.65, 29.75], [104.68, 29.68], [104.75, 29.65], [105.0, 29.75], [105.25, 29.65], [105.5, 29.75], [106.03, 29.53], [106.25, 29.0], [106.03, 28.47], [105.68, 28.32], [105.65, 28.25], [105.75, 28.0], [105.53, 27.47], [105.0, 27.25], [104.75, 27.35], [104.5, 27.25], [103.97, 27.47], [103.82, 27.82], [103.75, 27.85], [103.5, 27.75], [102.97, 27.97], [102.82, 28.32], [102.47, 28.47], [102.32, 28.82], [101.97, 28.97], [101.75, 29.5], [101.85, 29.75], [101.75, 30.0], [101.97, 30.53], [102.32, 30.68], [102.47, 31.03]]]]}, "2012-02-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[103.32, 31.18], [103.47, 31.53], [104.0, 31.75], [104.53, 31.53], [104.75, 31.0], [104.65, 30.75], [104.75, 30.5], [104.65, 30.25], [104.75, 30.0], [104.65, 29.75], [104.68, 29.68], [104.75, 29.65], [105.0, 29.75], [105.53, 29.53], [105.75, 29.0], [105.65, 28.75], [105.75, 28.5], [105.65, 28.25], [105.75, 28.0], [105.53, 27.47], [105.0, 27.25], [104.75, 27.35], [104.5, 27.25], [103.97, 27.47], [103.82, 27.82], [103.47, 27.97], [103.32, 28.32], [102.97, 28.47], [102.75, 29.0], [102.88, 29.3], [102.47, 29.47], [102.25, 30.0], [102.47, 30.53], [102.82, 30.68], [102.97, 31.03], [103.32, 31.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.990280635156239}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.0658058718259}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.350373851443692, 3.2782444744066765, 3.176250496505645, 4.6838996302662395, 4.230933751867099]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-5.315671556406926, -6.925457416371614, -7.50417174569219, -5.166268573902869, 0.4513230754300821]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.322970521187476, -6.228831690931433, -6.377701841221125, -6.315709602927864, -4.098599396334748]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.44921909520906, -8.225718727326466, -8.990280635156239, -8.535512399582046, -4.943589519812974]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.597838346773323, -1.6517970554736612, -1.633121770264248, -1.5447044381200952, -1.3693700672602966]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1326821747614635, -2.0932395376251183, -2.2614145652241504, -1.9363760328447905, -1.4788799232659235]}}