{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:00.706572", "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-15_to_2012-Dec-20_123.5_46.0"}, "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": 2012120000622}, "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 15 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 20 2012"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 218686.92792473748}, "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", "E.Siberia", "Russian-Far-East"]}, "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": 46.0}, "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": 123.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "123.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 122.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 131.75}, "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": 48.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-12-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.97, 47.53], [122.5, 47.75], [123.03, 47.53], [123.18, 47.18], [123.53, 47.03], [123.68, 46.68], [124.03, 46.53], [124.25, 46.0], [124.15, 45.75], [124.18, 45.68], [124.53, 45.53], [124.75, 45.0], [124.53, 44.47], [124.18, 44.32], [124.03, 43.97], [123.5, 43.75], [122.97, 43.97], [122.82, 44.32], [122.47, 44.47], [122.25, 45.0], [122.35, 45.25], [122.25, 45.5], [122.35, 45.75], [122.32, 45.82], [121.97, 45.97], [121.75, 46.5], [121.85, 46.75], [121.75, 47.0], [121.97, 47.53]]]]}, "2012-12-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.97, 47.53], [122.5, 47.75], [122.75, 47.65], [123.0, 47.75], [123.25, 47.65], [123.5, 47.75], [123.75, 47.65], [124.0, 47.75], [124.25, 47.65], [124.5, 47.75], [124.75, 47.65], [124.82, 47.68], [124.97, 48.03], [125.5, 48.25], [126.03, 48.03], [126.25, 47.5], [126.15, 47.25], [126.18, 47.18], [126.25, 47.15], [126.5, 47.25], [126.75, 47.15], [127.0, 47.25], [127.53, 47.03], [127.75, 46.5], [127.65, 46.25], [127.75, 46.0], [127.65, 45.75], [127.75, 45.5], [127.53, 44.97], [127.0, 44.75], [126.75, 44.85], [126.68, 44.82], [126.53, 44.47], [126.0, 44.25], [125.75, 44.35], [125.5, 44.25], [126.03, 44.03], [126.25, 43.5], [126.15, 43.25], [126.25, 43.0], [126.15, 42.75], [126.25, 42.5], [126.03, 41.97], [125.5, 41.75], [124.97, 41.97], [124.75, 42.5], [124.53, 41.97], [124.0, 41.75], [123.47, 41.97], [123.25, 42.5], [123.47, 43.03], [123.88, 43.2], [123.75, 43.5], [123.85, 43.75], [123.82, 43.82], [123.75, 43.85], [123.5, 43.75], [122.97, 43.97], [122.82, 44.32], [122.47, 44.47], [122.25, 45.0], [122.35, 45.25], [122.25, 45.5], [122.35, 45.75], [122.32, 45.82], [121.97, 45.97], [121.75, 46.5], [121.85, 46.75], [121.75, 47.0], [121.97, 47.53]], [[125.25, 44.35], [125.18, 44.32], [125.15, 44.25], [125.18, 44.18], [125.25, 44.15], [125.5, 44.25], [125.25, 44.35]], [[124.85, 42.75], [124.82, 42.82], [124.75, 42.85], [124.63, 42.8], [124.75, 42.5], [124.85, 42.75]]]]}, "2012-12-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.97, 47.53], [122.5, 47.75], [122.75, 47.65], [123.0, 47.75], [123.25, 47.65], [123.5, 47.75], [123.75, 47.65], [124.0, 47.75], [124.25, 47.65], [124.5, 47.75], [124.75, 47.65], [124.82, 47.68], [124.97, 48.03], [125.5, 48.25], [126.03, 48.03], [126.25, 47.5], [126.15, 47.25], [126.18, 47.18], [126.25, 47.15], [126.32, 47.18], [126.47, 47.53], [126.82, 47.68], [126.97, 48.03], [127.5, 48.25], [127.75, 48.15], [128.0, 48.25], [128.25, 48.15], [128.32, 48.18], [128.47, 48.53], [129.0, 48.75], [129.53, 48.53], [129.68, 48.18], [130.03, 48.03], [130.18, 47.68], [130.25, 47.65], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65], [131.5, 47.75], [132.03, 47.53], [132.25, 47.0], [132.03, 46.47], [131.5, 46.25], [131.25, 46.35], [131.0, 46.25], [130.75, 46.35], [130.5, 46.25], [130.25, 46.35], [130.18, 46.32], [130.03, 45.97], [129.68, 45.82], [129.53, 45.47], [129.13, 45.3], [129.25, 45.0], [129.03, 44.47], [128.5, 44.25], [128.0, 44.46], [127.5, 44.25], [127.25, 44.35], [127.18, 44.32], [127.15, 44.25], [127.25, 44.0], [127.04, 43.5], [127.25, 43.0], [127.03, 42.47], [126.68, 42.32], [126.53, 41.97], [126.0, 41.75], [125.75, 41.85], [125.5, 41.75], [125.25, 41.85], [125.18, 41.82], [125.03, 41.47], [124.68, 41.32], [124.53, 40.97], [124.0, 40.75], [123.47, 40.97], [123.25, 41.5], [123.35, 41.75], [123.25, 42.0], [123.35, 42.25], [123.25, 42.5], [123.47, 43.03], [123.88, 43.2], [123.82, 43.32], [123.47, 43.47], [123.32, 43.82], [122.97, 43.97], [122.82, 44.32], [122.47, 44.47], [122.25, 45.0], [122.35, 45.25], [122.25, 45.5], [122.35, 45.75], [122.32, 45.82], [121.97, 45.97], [121.75, 46.5], [121.85, 46.75], [121.75, 47.0], [121.97, 47.53]]]]}, "2012-12-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.75, 46.5], [121.97, 47.03], [122.32, 47.18], [122.47, 47.53], [122.82, 47.68], [122.97, 48.03], [123.5, 48.25], [123.75, 48.15], [124.0, 48.25], [124.53, 48.03], [124.68, 47.68], [124.75, 47.65], [124.82, 47.68], [124.97, 48.03], [125.5, 48.25], [126.03, 48.03], [126.25, 47.5], [126.15, 47.25], [126.18, 47.18], [126.25, 47.15], [126.32, 47.18], [126.47, 47.53], [126.82, 47.68], [126.97, 48.03], [127.5, 48.25], [127.75, 48.15], [128.0, 48.25], [128.25, 48.15], [128.32, 48.18], [128.47, 48.53], [129.0, 48.75], [129.53, 48.53], [129.68, 48.18], [130.03, 48.03], [130.18, 47.68], [130.25, 47.65], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65], [131.5, 47.75], [132.03, 47.53], [132.25, 47.0], [132.03, 46.47], [131.5, 46.25], [131.25, 46.35], [131.0, 46.25], [130.75, 46.35], [130.5, 46.25], [130.25, 46.35], [130.18, 46.32], [130.03, 45.97], [129.68, 45.82], [129.53, 45.47], [129.13, 45.3], [129.25, 45.0], [129.03, 44.47], [128.5, 44.25], [128.0, 44.46], [127.5, 44.25], [127.25, 44.35], [127.18, 44.32], [127.15, 44.25], [127.25, 44.0], [127.04, 43.5], [127.25, 43.0], [127.03, 42.47], [126.68, 42.32], [126.53, 41.97], [126.0, 41.75], [125.75, 41.85], [125.5, 41.75], [125.25, 41.85], [125.18, 41.82], [125.03, 41.47], [124.68, 41.32], [124.53, 40.97], [124.0, 40.75], [123.47, 40.97], [123.25, 41.5], [123.35, 41.75], [123.25, 42.0], [123.35, 42.25], [123.25, 42.5], [123.47, 43.03], [123.88, 43.2], [123.82, 43.32], [123.47, 43.47], [123.32, 43.82], [122.97, 43.97], [122.82, 44.32], [122.47, 44.47], [122.25, 45.0], [122.35, 45.25], [122.25, 45.5], [122.35, 45.75], [122.32, 45.82], [121.97, 45.97], [121.75, 46.5]]]]}, "2012-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[121.75, 46.5], [121.97, 47.03], [122.32, 47.18], [122.47, 47.53], [122.82, 47.68], [122.97, 48.03], [123.5, 48.25], [123.75, 48.15], [124.0, 48.25], [124.53, 48.03], [124.68, 47.68], [124.75, 47.65], [124.82, 47.68], [124.97, 48.03], [125.5, 48.25], [126.03, 48.03], [126.25, 47.5], [126.15, 47.25], [126.18, 47.18], [126.25, 47.15], [126.32, 47.18], [126.47, 47.53], [126.82, 47.68], [126.97, 48.03], [127.5, 48.25], [127.75, 48.15], [128.0, 48.25], [128.25, 48.15], [128.32, 48.18], [128.47, 48.53], [129.0, 48.75], [129.53, 48.53], [129.68, 48.18], [130.03, 48.03], [130.18, 47.68], [130.25, 47.65], [130.5, 47.75], [130.75, 47.65], [131.0, 47.75], [131.25, 47.65], [131.5, 47.75], [132.03, 47.53], [132.25, 47.0], [132.03, 46.47], [131.5, 46.25], [131.25, 46.35], [131.0, 46.25], [130.75, 46.35], [130.5, 46.25], [130.25, 46.35], [130.18, 46.32], [130.03, 45.97], [129.68, 45.82], [129.53, 45.47], [129.13, 45.3], [129.25, 45.0], [129.03, 44.47], [128.5, 44.25], [128.0, 44.46], [127.5, 44.25], [127.25, 44.35], [127.18, 44.32], [127.15, 44.25], [127.25, 44.0], [127.04, 43.5], [127.25, 43.0], [127.03, 42.47], [126.68, 42.32], [126.53, 41.97], [126.0, 41.75], [125.75, 41.85], [125.5, 41.75], [125.25, 41.85], [125.18, 41.82], [125.03, 41.47], [124.68, 41.32], [124.53, 40.97], [124.0, 40.75], [123.47, 40.97], [123.25, 41.5], [123.35, 41.75], [123.25, 42.0], [123.35, 42.25], [123.25, 42.5], [123.47, 43.03], [124.0, 43.25], [123.47, 43.47], [123.32, 43.82], [122.97, 43.97], [122.82, 44.32], [122.47, 44.47], [122.25, 45.0], [122.35, 45.25], [122.25, 45.5], [122.35, 45.75], [122.32, 45.82], [121.97, 45.97], [121.75, 46.5]], [[124.25, 43.15], [124.32, 43.18], [124.38, 43.3], [124.25, 43.35], [124.0, 43.25], [124.25, 43.15]]]]}, "2012-12-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.25, 46.0], [125.47, 46.53], [126.0, 46.75], [126.25, 46.65], [126.5, 46.75], [127.03, 46.53], [127.25, 46.0], [127.03, 45.47], [126.5, 45.25], [126.25, 45.35], [126.0, 45.25], [125.47, 45.47], [125.25, 46.0]]], [[[122.75, 47.5], [122.97, 48.03], [123.5, 48.25], [123.75, 48.15], [124.0, 48.25], [124.53, 48.03], [124.75, 47.5], [124.53, 46.97], [124.0, 46.75], [123.75, 46.85], [123.5, 46.75], [122.97, 46.97], [122.75, 47.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.696052380059797}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.765300074989677}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.307226904871953, -21.401902893254032, -22.44102530279261, -23.846074459951126, -22.758117388863724, -22.376940351440652]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.7666766904226, -24.719634200766308, -28.020424974053157, -29.11721909771731, -27.95036035994997, -22.83054411183886]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.671165586273575, -6.94250799607619, -7.520628302235195, -8.903352242227966, -7.5860396038038544, -5.966157546077973]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.327142151337199, -9.39156687015506, -10.351727357528063, -11.696052380059797, -10.2082611324835, -6.298221238997002]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4544073596310747, -1.6044984231012311, -1.6017886980398746, -1.905748562542499, -1.6714710478687547, -1.3920792226201915]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7181411623867138, -2.419684746226501, -1.9443751961762277, -2.2103833618060387, -2.2901884568228548, -1.5242450456517656]}}