{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:30.564485", "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-Jan-04_to_2011-Jan-06_109.0_42.0"}, "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": 2011010000367}, "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 04 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 06 2011"}, "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": 68585.00483950556}, "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", "Mongolia"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.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": 42.0}, "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": 109.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "109.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 107.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 113.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 43.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-01-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.35, 42.75], [107.25, 43.0], [107.47, 43.53], [108.0, 43.75], [108.25, 43.65], [108.5, 43.75], [108.75, 43.65], [108.82, 43.68], [108.97, 44.03], [109.5, 44.25], [110.03, 44.03], [110.18, 43.68], [110.53, 43.53], [110.68, 43.18], [110.75, 43.15], [111.0, 43.25], [111.25, 43.15], [111.5, 43.25], [111.75, 43.15], [112.0, 43.25], [112.53, 43.03], [112.68, 42.68], [112.75, 42.65], [113.0, 42.75], [113.53, 42.53], [113.75, 42.0], [113.65, 41.75], [113.75, 41.5], [113.53, 40.97], [113.0, 40.75], [112.75, 40.85], [112.5, 40.75], [112.0, 40.96], [111.5, 40.75], [111.0, 40.96], [110.5, 40.75], [109.97, 40.97], [109.82, 41.32], [109.75, 41.35], [109.5, 41.25], [109.25, 41.35], [109.0, 41.25], [108.75, 41.35], [108.5, 41.25], [108.25, 41.35], [108.0, 41.25], [107.47, 41.47], [107.25, 42.0], [107.35, 42.25], [107.25, 42.5], [107.35, 42.75]]]]}, "2011-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.35, 42.75], [107.25, 43.0], [107.47, 43.53], [108.0, 43.75], [108.25, 43.65], [108.5, 43.75], [108.75, 43.65], [108.82, 43.68], [108.97, 44.03], [109.5, 44.25], [110.03, 44.03], [110.18, 43.68], [110.53, 43.53], [110.68, 43.18], [110.75, 43.15], [111.0, 43.25], [111.25, 43.15], [111.5, 43.25], [111.75, 43.15], [112.0, 43.25], [112.53, 43.03], [112.68, 42.68], [112.75, 42.65], [113.0, 42.75], [113.53, 42.53], [113.75, 42.0], [113.65, 41.75], [113.75, 41.5], [113.53, 40.97], [113.0, 40.75], [112.75, 40.85], [112.5, 40.75], [112.0, 40.96], [111.5, 40.75], [111.0, 40.96], [110.5, 40.75], [109.97, 40.97], [109.82, 41.32], [109.75, 41.35], [109.5, 41.25], [109.25, 41.35], [109.0, 41.25], [108.75, 41.35], [108.5, 41.25], [108.25, 41.35], [108.0, 41.25], [107.47, 41.47], [107.25, 42.0], [107.35, 42.25], [107.25, 42.5], [107.35, 42.75]]]]}, "2011-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[107.35, 42.75], [107.25, 43.0], [107.47, 43.53], [108.0, 43.75], [108.25, 43.65], [108.5, 43.75], [108.75, 43.65], [108.82, 43.68], [108.97, 44.03], [109.5, 44.25], [110.03, 44.03], [110.18, 43.68], [110.53, 43.53], [110.68, 43.18], [110.75, 43.15], [111.0, 43.25], [111.25, 43.15], [111.5, 43.25], [111.75, 43.15], [112.0, 43.25], [112.53, 43.03], [112.68, 42.68], [112.75, 42.65], [113.0, 42.75], [113.53, 42.53], [113.75, 42.0], [113.65, 41.75], [113.75, 41.5], [113.53, 40.97], [113.0, 40.75], [112.75, 40.85], [112.5, 40.75], [112.0, 40.96], [111.5, 40.75], [111.0, 40.96], [110.5, 40.75], [109.97, 40.97], [109.82, 41.32], [109.75, 41.35], [109.5, 41.25], [109.25, 41.35], [109.0, 41.25], [108.75, 41.35], [108.5, 41.25], [108.25, 41.35], [108.0, 41.25], [107.47, 41.47], [107.25, 42.0], [107.35, 42.25], [107.25, 42.5], [107.35, 42.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.301803499159718}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.063510194310131}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-21.785233491654054, -23.078810258893242, -20.829962264801736]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.592652996890337, -25.09004198758052, -22.082619780828082]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.142764684769714, -9.178797075235854, -6.86896882292483]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.0246126225326, -11.301803499159718, -8.076662659947118]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.607131258370245, -1.8161877299732434, -1.4250748092145848]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0631157032020964, -2.326250218519227, -1.5926371113745204]}}