{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:06:01.969084", "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": "2016-Aug-26_to_2016-Sep-01_128.0_38.0"}, "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": 2016080000743}, "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": "August 26 2016"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 01 2016"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 109183.81222304907}, "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", "North Korea", "South Korea"]}, "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": ["Japan Sea"]}, "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": 38.0}, "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": 128.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "128.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 125.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 130.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2016-08-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.0, 36.25], [128.53, 36.03], [128.75, 35.5], [128.65, 35.25], [128.75, 35.0], [128.53, 34.47], [128.0, 34.25], [127.47, 34.47], [127.25, 35.0], [127.35, 35.25], [127.25, 35.5], [127.47, 36.03], [128.0, 36.25]]], [[[127.25, 40.5], [127.47, 41.03], [128.0, 41.25], [128.25, 41.15], [128.5, 41.25], [129.03, 41.03], [129.25, 40.5], [129.03, 39.97], [128.5, 39.75], [128.25, 39.85], [128.0, 39.75], [127.47, 39.97], [127.25, 40.5]]]]}, "2016-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.53, 36.03], [128.75, 35.5], [128.65, 35.25], [128.75, 35.0], [128.53, 34.47], [128.0, 34.25], [127.75, 34.35], [127.5, 34.25], [126.97, 34.47], [126.75, 35.0], [126.97, 35.53], [127.32, 35.68], [127.47, 36.03], [128.0, 36.25], [128.53, 36.03]]], [[[127.25, 40.5], [127.47, 41.03], [128.0, 41.25], [128.25, 41.15], [128.5, 41.25], [129.03, 41.03], [129.25, 40.5], [129.03, 39.97], [128.5, 39.75], [128.25, 39.85], [128.0, 39.75], [127.47, 39.97], [127.25, 40.5]]]]}, "2016-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, 39.03], [126.32, 39.18], [126.47, 39.53], [127.0, 39.75], [127.53, 39.53], [127.68, 39.18], [127.75, 39.15], [128.0, 39.25], [128.25, 39.15], [128.5, 39.25], [129.03, 39.03], [129.18, 38.68], [129.25, 38.65], [129.5, 38.75], [130.0, 38.54], [130.5, 38.75], [131.03, 38.53], [131.25, 38.0], [131.15, 37.75], [131.25, 37.5], [131.15, 37.25], [131.25, 37.0], [131.03, 36.47], [130.5, 36.25], [129.97, 36.47], [129.82, 36.82], [129.75, 36.85], [129.68, 36.82], [129.53, 36.47], [129.0, 36.25], [128.75, 36.35], [128.68, 36.32], [128.54, 36.0], [128.75, 35.5], [128.65, 35.25], [128.75, 35.0], [128.53, 34.47], [128.0, 34.25], [127.75, 34.35], [127.5, 34.25], [126.97, 34.47], [126.75, 35.0], [126.85, 35.25], [126.75, 35.5], [126.85, 35.75], [126.75, 36.0], [126.97, 36.53], [127.32, 36.68], [127.35, 36.75], [127.32, 36.82], [127.25, 36.85], [127.0, 36.75], [126.47, 36.97], [126.25, 37.5], [126.35, 37.75], [126.32, 37.82], [125.97, 37.97], [125.75, 38.5], [125.97, 39.03]]], [[[127.25, 40.5], [127.47, 41.03], [128.0, 41.25], [128.25, 41.15], [128.5, 41.25], [129.03, 41.03], [129.25, 40.5], [129.03, 39.97], [128.5, 39.75], [128.25, 39.85], [128.0, 39.75], [127.47, 39.97], [127.25, 40.5]]]]}, "2016-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.97, 39.03], [126.32, 39.18], [126.47, 39.53], [127.0, 39.75], [127.53, 39.53], [127.68, 39.18], [127.75, 39.15], [128.0, 39.25], [128.25, 39.15], [128.5, 39.25], [128.93, 39.07], [128.75, 39.5], [128.97, 40.03], [129.5, 40.25], [130.03, 40.03], [130.18, 39.68], [130.53, 39.53], [130.75, 39.0], [130.63, 38.7], [131.03, 38.53], [131.25, 38.0], [131.15, 37.75], [131.25, 37.5], [131.15, 37.25], [131.25, 37.0], [131.03, 36.47], [130.5, 36.25], [129.97, 36.47], [129.82, 36.82], [129.75, 36.85], [129.68, 36.82], [129.53, 36.47], [129.0, 36.25], [128.75, 36.35], [128.68, 36.32], [128.54, 36.0], [128.75, 35.5], [128.65, 35.25], [128.75, 35.0], [128.53, 34.47], [128.0, 34.25], [127.75, 34.35], [127.5, 34.25], [126.97, 34.47], [126.75, 35.0], [126.85, 35.25], [126.75, 35.5], [126.85, 35.75], [126.75, 36.0], [126.97, 36.53], [127.32, 36.68], [127.35, 36.75], [127.32, 36.82], [127.25, 36.85], [127.0, 36.75], [126.47, 36.97], [126.25, 37.5], [126.35, 37.75], [126.32, 37.82], [125.97, 37.97], [125.75, 38.5], [125.97, 39.03]]], [[[126.25, 41.0], [126.47, 41.53], [127.0, 41.75], [127.25, 41.65], [127.5, 41.75], [127.75, 41.65], [128.0, 41.75], [128.25, 41.65], [128.5, 41.75], [129.03, 41.53], [129.25, 41.0], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.0, 40.25], [127.75, 40.35], [127.5, 40.25], [127.25, 40.35], [127.0, 40.25], [126.47, 40.47], [126.25, 41.0]]]]}, "2016-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.25, 39.5], [125.47, 40.03], [125.82, 40.18], [125.85, 40.25], [125.75, 40.5], [125.96, 41.0], [125.75, 41.5], [125.97, 42.03], [126.5, 42.25], [127.03, 42.03], [127.18, 41.68], [127.25, 41.65], [127.5, 41.75], [127.75, 41.65], [128.0, 41.75], [128.25, 41.65], [128.5, 41.75], [129.03, 41.53], [129.25, 41.0], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.0, 40.25], [127.75, 40.35], [127.5, 40.25], [127.25, 40.35], [127.18, 40.32], [127.15, 40.25], [127.25, 40.0], [127.13, 39.7], [127.53, 39.53], [127.68, 39.18], [127.75, 39.15], [128.0, 39.25], [128.25, 39.15], [128.5, 39.25], [128.93, 39.07], [128.75, 39.5], [128.97, 40.03], [129.5, 40.25], [130.03, 40.03], [130.18, 39.68], [130.53, 39.53], [130.75, 39.0], [130.63, 38.7], [131.03, 38.53], [131.25, 38.0], [131.15, 37.75], [131.25, 37.5], [131.15, 37.25], [131.25, 37.0], [131.03, 36.47], [130.5, 36.25], [129.97, 36.47], [129.82, 36.82], [129.75, 36.85], [129.68, 36.82], [129.53, 36.47], [129.0, 36.25], [128.75, 36.35], [128.68, 36.32], [128.53, 35.97], [128.18, 35.82], [128.15, 35.75], [128.25, 35.5], [128.03, 34.97], [127.5, 34.75], [126.97, 34.97], [126.75, 35.5], [126.85, 35.75], [126.75, 36.0], [126.97, 36.53], [127.32, 36.68], [127.35, 36.75], [127.32, 36.82], [127.25, 36.85], [127.0, 36.75], [126.47, 36.97], [126.25, 37.5], [126.35, 37.75], [126.32, 37.82], [125.97, 37.97], [125.75, 38.5], [125.85, 38.75], [125.82, 38.82], [125.47, 38.97], [125.25, 39.5]]]]}, "2016-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.25, 39.5], [125.47, 40.03], [125.82, 40.18], [125.85, 40.25], [125.75, 40.5], [125.96, 41.0], [125.75, 41.5], [125.97, 42.03], [126.5, 42.25], [127.03, 42.03], [127.18, 41.68], [127.25, 41.65], [127.5, 41.75], [127.75, 41.65], [128.0, 41.75], [128.25, 41.65], [128.5, 41.75], [129.03, 41.53], [129.25, 41.0], [129.03, 40.47], [128.5, 40.25], [128.25, 40.35], [128.0, 40.25], [127.75, 40.35], [127.5, 40.25], [127.25, 40.35], [127.18, 40.32], [127.15, 40.25], [127.25, 40.0], [127.13, 39.7], [127.53, 39.53], [127.68, 39.18], [127.75, 39.15], [128.0, 39.25], [128.25, 39.15], [128.5, 39.25], [128.93, 39.07], [128.75, 39.5], [128.97, 40.03], [129.5, 40.25], [130.03, 40.03], [130.18, 39.68], [130.53, 39.53], [130.75, 39.0], [130.53, 38.47], [130.18, 38.32], [130.03, 37.97], [129.5, 37.75], [129.2, 37.88], [129.15, 37.75], [129.25, 37.5], [129.03, 36.97], [128.68, 36.82], [128.53, 36.47], [128.0, 36.25], [127.47, 36.47], [127.32, 36.82], [127.25, 36.85], [127.0, 36.75], [126.47, 36.97], [126.25, 37.5], [126.35, 37.75], [126.32, 37.82], [125.97, 37.97], [125.75, 38.5], [125.85, 38.75], [125.82, 38.82], [125.47, 38.97], [125.25, 39.5]]]]}, "2016-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.25, 39.5], [125.47, 40.03], [125.82, 40.18], [125.85, 40.25], [125.75, 40.5], [125.96, 41.0], [125.75, 41.5], [125.97, 42.03], [126.5, 42.25], [127.03, 42.03], [127.25, 41.5], [127.04, 41.0], [127.25, 40.5], [127.15, 40.25], [127.25, 40.0], [127.04, 39.5], [127.25, 39.0], [127.03, 38.47], [126.5, 38.25], [125.97, 38.47], [125.82, 38.82], [125.47, 38.97], [125.25, 39.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.0880623442969295}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.773907884279539}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [18.24349629650908, 18.56710342881371, 18.44070411305404, 18.4248173616632, 17.395197662071098, 15.892888544540767, 16.842630955864877]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [14.098633298742527, 13.707251463495822, 13.807206093560978, 11.102163830079746, 9.202865160081274, 10.4743137663109, 14.986946598719157]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.060089877102058, -3.20339101716836, -3.8445539659766945, -3.3562800244465394, -3.8875421675979696, -4.509081998880853, -2.7441722672676976]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.381848488535468, -3.5534062323720264, -5.386665233131112, -5.551007738292697, -5.818841005703632, -6.0880623442969295, -3.1497625905890345]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5538521048182805, -1.6092854907746408, -1.856989680419426, -1.6394107084434382, -1.9163910951066447, -2.209984496530511, -1.3697617839561393]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.6603010783183814, -1.8948950606397776, -2.6674835971193733, -2.2760600961268542, -2.464744041939323, -3.22493364962433, -1.4776809534086164]}}