{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:01.738734", "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-Dec-21_to_2012-Dec-24_112.5_24.0"}, "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": 2012120000878}, "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": "December 21 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 24 2012"}, "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": 70662.36851669737}, "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": 24.0}, "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": 112.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "112.5\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": 113.75}, "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": 25.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-12-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.25, 25.5], [111.47, 26.03], [112.0, 26.25], [112.25, 26.15], [112.5, 26.25], [112.75, 26.15], [113.0, 26.25], [113.53, 26.03], [113.75, 25.5], [113.65, 25.25], [113.75, 25.0], [113.53, 24.47], [113.18, 24.32], [113.03, 23.97], [112.5, 23.75], [111.97, 23.97], [111.75, 24.5], [111.85, 24.75], [111.82, 24.82], [111.47, 24.97], [111.25, 25.5]]]]}, "2012-12-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 23.5], [109.97, 24.03], [110.5, 24.25], [110.75, 24.15], [111.0, 24.25], [111.25, 24.15], [111.32, 24.18], [111.47, 24.53], [111.82, 24.68], [111.85, 24.75], [111.82, 24.82], [111.47, 24.97], [111.25, 25.5], [111.47, 26.03], [112.0, 26.25], [112.25, 26.15], [112.5, 26.25], [112.75, 26.15], [113.0, 26.25], [113.53, 26.03], [113.68, 25.68], [114.03, 25.53], [114.25, 25.0], [114.15, 24.75], [114.25, 24.5], [114.15, 24.25], [114.25, 24.0], [114.03, 23.47], [113.68, 23.32], [113.53, 22.97], [113.18, 22.82], [113.15, 22.75], [113.25, 22.5], [113.15, 22.25], [113.25, 22.0], [113.03, 21.47], [112.5, 21.25], [111.97, 21.47], [111.8, 21.88], [111.5, 21.75], [110.97, 21.97], [110.82, 22.32], [110.47, 22.47], [110.32, 22.82], [109.97, 22.97], [109.75, 23.5]]]]}, "2012-12-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 23.5], [109.97, 24.03], [110.5, 24.25], [110.75, 24.15], [111.0, 24.25], [111.25, 24.15], [111.32, 24.18], [111.47, 24.53], [111.82, 24.68], [111.85, 24.75], [111.82, 24.82], [111.47, 24.97], [111.25, 25.5], [111.47, 26.03], [112.0, 26.25], [112.25, 26.15], [112.5, 26.25], [112.75, 26.15], [113.0, 26.25], [113.53, 26.03], [113.68, 25.68], [114.03, 25.53], [114.25, 25.0], [114.15, 24.75], [114.25, 24.5], [114.15, 24.25], [114.25, 24.0], [114.03, 23.47], [113.68, 23.32], [113.53, 22.97], [113.18, 22.82], [113.15, 22.75], [113.25, 22.5], [113.15, 22.25], [113.25, 22.0], [113.03, 21.47], [112.5, 21.25], [111.97, 21.47], [111.8, 21.88], [111.5, 21.75], [110.97, 21.97], [110.82, 22.32], [110.47, 22.47], [110.32, 22.82], [109.97, 22.97], [109.75, 23.5]]]]}, "2012-12-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[109.75, 23.5], [109.97, 24.03], [110.5, 24.25], [110.75, 24.15], [111.0, 24.25], [111.25, 24.15], [111.32, 24.18], [111.47, 24.53], [112.0, 24.75], [112.25, 24.65], [112.5, 24.75], [112.75, 24.65], [112.82, 24.68], [112.85, 24.75], [112.75, 25.0], [112.97, 25.53], [113.5, 25.75], [114.03, 25.53], [114.25, 25.0], [114.15, 24.75], [114.25, 24.5], [114.15, 24.25], [114.25, 24.0], [114.03, 23.47], [113.68, 23.32], [113.53, 22.97], [113.18, 22.82], [113.15, 22.75], [113.25, 22.5], [113.15, 22.25], [113.25, 22.0], [113.03, 21.47], [112.5, 21.25], [111.97, 21.47], [111.8, 21.88], [111.5, 21.75], [110.97, 21.97], [110.82, 22.32], [110.47, 22.47], [110.32, 22.82], [109.97, 22.97], [109.75, 23.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.414940745789806}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.161794366905921}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.5900790744759092, 7.832790670887334, 6.663595980282878, 8.722422661366352]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [2.50699982542352, 2.4840873693657954, 2.1091054665678826, 6.104814266872893]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.228331198997675, -4.784608442843166, -5.7980305475168095, -4.799927134997823]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.4740790601037475, -5.98353607135482, -6.414940745789806, -5.473252500934848]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4479039824654152, -1.4119243568222277, -1.7405206756679237, -1.4899638919227538]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.535295905360508, -1.664399428878754, -1.9429383960806907, -1.7284559681680538]}}