{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:48:09.039122", "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-Aug-19_to_2011-Aug-22_138.5_36.5"}, "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": 2011080001087}, "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 19 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 22 2011"}, "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": 72245.78165503942}, "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": ["Japan"]}, "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": ["North Pacific Ocean", "Philippine 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": 36.5}, "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": 138.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "138.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 136.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 140.75}, "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": 37.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-08-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.25, 36.5], [136.47, 37.03], [137.0, 37.25], [137.25, 37.15], [137.32, 37.18], [137.47, 37.53], [138.0, 37.75], [138.25, 37.65], [138.5, 37.75], [138.75, 37.65], [139.0, 37.75], [139.25, 37.65], [139.5, 37.75], [140.03, 37.53], [140.18, 37.18], [140.25, 37.15], [140.5, 37.25], [141.03, 37.03], [141.25, 36.5], [141.04, 36.0], [141.25, 35.5], [141.03, 34.97], [140.5, 34.75], [139.97, 34.97], [139.82, 35.32], [139.75, 35.35], [139.68, 35.32], [139.53, 34.97], [139.0, 34.75], [138.75, 34.85], [138.5, 34.75], [137.97, 34.97], [137.82, 35.32], [137.75, 35.35], [137.5, 35.25], [136.97, 35.47], [136.82, 35.82], [136.47, 35.97], [136.25, 36.5]]]]}, "2011-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.25, 36.5], [136.47, 37.03], [137.0, 37.25], [137.25, 37.15], [137.32, 37.18], [137.47, 37.53], [138.0, 37.75], [138.25, 37.65], [138.5, 37.75], [138.75, 37.65], [138.82, 37.68], [138.97, 38.03], [139.5, 38.25], [139.75, 38.15], [140.0, 38.25], [140.53, 38.03], [140.68, 37.68], [141.03, 37.53], [141.25, 37.0], [141.15, 36.75], [141.25, 36.5], [141.04, 36.0], [141.25, 35.5], [141.03, 34.97], [140.5, 34.75], [140.0, 34.96], [139.68, 34.82], [139.53, 34.47], [139.0, 34.25], [138.75, 34.35], [138.5, 34.25], [137.97, 34.47], [137.82, 34.82], [137.47, 34.97], [137.32, 35.32], [136.97, 35.47], [136.82, 35.82], [136.47, 35.97], [136.25, 36.5]]]]}, "2011-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.25, 36.5], [136.47, 37.03], [137.0, 37.25], [137.25, 37.15], [137.32, 37.18], [137.47, 37.53], [138.0, 37.75], [138.25, 37.65], [138.5, 37.75], [138.75, 37.65], [138.82, 37.68], [138.97, 38.03], [139.5, 38.25], [139.75, 38.15], [140.0, 38.25], [140.53, 38.03], [140.68, 37.68], [141.03, 37.53], [141.25, 37.0], [141.15, 36.75], [141.25, 36.5], [141.04, 36.0], [141.25, 35.5], [141.03, 34.97], [140.5, 34.75], [140.0, 34.96], [139.68, 34.82], [139.53, 34.47], [139.0, 34.25], [138.75, 34.35], [138.5, 34.25], [137.97, 34.47], [137.82, 34.82], [137.47, 34.97], [137.32, 35.32], [136.97, 35.47], [136.82, 35.82], [136.47, 35.97], [136.25, 36.5]]]]}, "2011-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.97, 37.03], [137.32, 37.18], [137.47, 37.53], [138.0, 37.75], [138.25, 37.65], [138.5, 37.75], [138.75, 37.65], [138.82, 37.68], [138.97, 38.03], [139.5, 38.25], [139.75, 38.15], [140.0, 38.25], [140.53, 38.03], [140.68, 37.68], [141.03, 37.53], [141.25, 37.0], [141.15, 36.75], [141.25, 36.5], [141.03, 35.97], [140.68, 35.82], [140.53, 35.47], [140.18, 35.32], [140.03, 34.97], [139.68, 34.82], [139.53, 34.47], [139.0, 34.25], [138.75, 34.35], [138.5, 34.25], [137.97, 34.47], [137.82, 34.82], [137.47, 34.97], [137.32, 35.32], [136.97, 35.47], [136.75, 36.0], [136.85, 36.25], [136.75, 36.5], [136.97, 37.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.31040894954009}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.279581189061709}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [20.270151947991735, 19.157923896790123, 18.02623334526288, 19.90737983293127]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.110913474797997, 15.373233523801161, 14.270567935337453, 16.69620693342756]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.1905129914504027, -4.491171164223613, -5.538941737882937, -3.4257168320799543]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.038624766843725, -6.472310837673604, -7.31040894954009, -4.671247080227886]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5566655573603319, -2.3011169345590634, -2.7916298231461982, -1.6985901172263926]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.0067430678717315, -3.454012418874386, -3.434038734803155, -2.1121379617639398]}}