{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:45:51.160717", "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": "2010-Oct-26_to_2010-Oct-29_140.5_40.0"}, "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": 2010100001054}, "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": "October 26 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 29 2010"}, "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": 146438.87013662988}, "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": ["Japan Sea", "North Pacific Ocean"]}, "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": 40.0}, "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": 140.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "140.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 137.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 142.25}, "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": 41.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-10-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.35, 36.75], [137.25, 37.0], [137.35, 37.25], [137.25, 37.5], [137.47, 38.03], [137.82, 38.18], [137.97, 38.53], [138.5, 38.75], [138.75, 38.65], [138.82, 38.68], [138.97, 39.03], [139.32, 39.18], [139.35, 39.25], [139.25, 39.5], [139.35, 39.75], [139.25, 40.0], [139.35, 40.25], [139.25, 40.5], [139.47, 41.03], [139.82, 41.18], [139.97, 41.53], [140.5, 41.75], [141.03, 41.53], [141.18, 41.18], [141.25, 41.15], [141.5, 41.25], [142.03, 41.03], [142.18, 40.68], [142.53, 40.53], [142.75, 40.0], [142.53, 39.47], [142.18, 39.32], [142.15, 39.25], [142.25, 39.0], [142.15, 38.75], [142.25, 38.5], [142.03, 37.97], [141.68, 37.82], [141.65, 37.75], [141.75, 37.5], [141.65, 37.25], [141.75, 37.0], [141.53, 36.47], [141.18, 36.32], [141.15, 36.25], [141.25, 36.0], [141.15, 35.75], [141.25, 35.5], [141.03, 34.97], [140.68, 34.82], [140.53, 34.47], [140.0, 34.25], [139.75, 34.35], [139.5, 34.25], [138.97, 34.47], [138.75, 35.0], [138.85, 35.25], [138.82, 35.32], [138.75, 35.35], [138.5, 35.25], [138.25, 35.35], [138.0, 35.25], [137.47, 35.47], [137.25, 36.0], [137.35, 36.25], [137.25, 36.5], [137.35, 36.75]]]]}, "2010-10-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.35, 36.75], [137.25, 37.0], [137.35, 37.25], [137.25, 37.5], [137.47, 38.03], [137.82, 38.18], [137.97, 38.53], [138.5, 38.75], [138.75, 38.65], [138.82, 38.68], [138.97, 39.03], [139.32, 39.18], [139.35, 39.25], [139.25, 39.5], [139.35, 39.75], [139.25, 40.0], [139.35, 40.25], [139.25, 40.5], [139.47, 41.03], [139.82, 41.18], [139.97, 41.53], [140.5, 41.75], [141.03, 41.53], [141.18, 41.18], [141.25, 41.15], [141.5, 41.25], [142.03, 41.03], [142.18, 40.68], [142.53, 40.53], [142.75, 40.0], [142.53, 39.47], [142.18, 39.32], [142.15, 39.25], [142.25, 39.0], [142.15, 38.75], [142.25, 38.5], [142.03, 37.97], [141.68, 37.82], [141.65, 37.75], [141.75, 37.5], [141.65, 37.25], [141.75, 37.0], [141.53, 36.47], [141.18, 36.32], [141.15, 36.25], [141.25, 36.0], [141.15, 35.75], [141.25, 35.5], [141.03, 34.97], [140.68, 34.82], [140.53, 34.47], [140.0, 34.25], [139.75, 34.35], [139.5, 34.25], [139.25, 34.35], [139.0, 34.25], [138.47, 34.47], [138.25, 35.0], [138.38, 35.3], [138.25, 35.35], [138.0, 35.25], [137.47, 35.47], [137.25, 36.0], [137.35, 36.25], [137.25, 36.5], [137.35, 36.75]]]]}, "2010-10-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.35, 36.75], [137.25, 37.0], [137.35, 37.25], [137.25, 37.5], [137.47, 38.03], [137.82, 38.18], [137.97, 38.53], [138.5, 38.75], [138.75, 38.65], [138.82, 38.68], [138.97, 39.03], [139.32, 39.18], [139.35, 39.25], [139.25, 39.5], [139.35, 39.75], [139.25, 40.0], [139.35, 40.25], [139.25, 40.5], [139.47, 41.03], [139.82, 41.18], [139.97, 41.53], [140.5, 41.75], [141.03, 41.53], [141.18, 41.18], [141.25, 41.15], [141.5, 41.25], [142.03, 41.03], [142.18, 40.68], [142.53, 40.53], [142.75, 40.0], [142.53, 39.47], [142.18, 39.32], [142.15, 39.25], [142.25, 39.0], [142.15, 38.75], [142.25, 38.5], [142.03, 37.97], [141.68, 37.82], [141.65, 37.75], [141.75, 37.5], [141.65, 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"Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.14464076119441}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.216666800305215}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.338296594630606, 6.895535405696137, 7.607409916160179, 6.4591114524793625]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [1.9353244780971295, 1.0190435416095056, 2.0554378393160277, 4.1966867039399744]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.3292639139253355, -5.675827887678488, -4.764751036147669, -4.037008617550072]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.14464076119441, -7.033114260386753, -6.496627397469183, -4.544365616618393]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.342976799230479, -2.5288473192431207, -2.0685234645980186, -1.5746071542574447]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.044751085603347, -3.0253873554373802, -2.791090269772101, -1.7561343168196504]}}