{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:47.771687", "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": "2022-Jun-04_to_2022-Jun-09_140.5_39.0"}, "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": 2022060000276}, "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": "June 04 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 09 2022"}, "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": 111922.98931832037}, "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"]}, "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": ["Pacific Ocean", "Sea of Japan"]}, "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": 39.0}, "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": 138.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 142.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 35.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[141.25, 36.5], [141.04, 36.0], [141.25, 35.5], [141.03, 34.97], [140.68, 34.82], [140.53, 34.47], [140.0, 34.25], [139.47, 34.47], [139.32, 34.82], [139.25, 34.85], [139.0, 34.75], [138.47, 34.97], [138.32, 35.32], [137.97, 35.47], [137.75, 36.0], [137.85, 36.25], [137.75, 36.5], [137.97, 37.03], [138.32, 37.18], [138.35, 37.25], [138.25, 37.5], [138.47, 38.03], [138.82, 38.18], [138.97, 38.53], [139.32, 38.68], [139.35, 38.75], [139.25, 39.0], [139.35, 39.25], [139.25, 39.5], [139.47, 40.03], [140.0, 40.25], [140.25, 40.15], [140.37, 40.2], [140.25, 40.5], [140.35, 40.75], [140.32, 40.82], [139.97, 40.97], [139.75, 41.5], [139.97, 42.03], [140.5, 42.25], [140.75, 42.15], [141.0, 42.25], [141.25, 42.15], [141.5, 42.25], [142.03, 42.03], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.15, 40.75], [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], [142.03, 38.47], [141.68, 38.32], [141.54, 38.0], [141.75, 37.5], [141.53, 36.97], [141.18, 36.82], [141.15, 36.75], [141.25, 36.5]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-06-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.97, 39.53], [140.5, 39.75], [141.03, 39.53], [141.25, 39.0], [141.03, 38.47], [140.5, 38.25], [139.97, 38.47], [139.75, 39.0], [139.97, 39.53]]]]}, "2022-06-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.75, 38.5], [139.85, 38.75], [139.75, 39.0], [139.97, 39.53], [140.5, 39.75], [140.75, 39.65], [140.82, 39.68], [140.85, 39.75], [140.82, 39.82], [140.47, 39.97], [140.25, 40.5], [140.47, 41.03], [141.0, 41.25], [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], [142.03, 38.47], [141.68, 38.32], [141.54, 38.0], [141.75, 37.5], [141.53, 36.97], [141.0, 36.75], [140.47, 36.97], [140.32, 37.32], [139.97, 37.47], [139.75, 38.0], [139.85, 38.25], [139.75, 38.5]]]]}, "2022-06-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.75, 36.5], [137.97, 37.03], [138.32, 37.18], [138.35, 37.25], [138.25, 37.5], [138.47, 38.03], [138.82, 38.18], [138.97, 38.53], [139.32, 38.68], [139.35, 38.75], [139.25, 39.0], [139.35, 39.25], [139.25, 39.5], [139.47, 40.03], [140.0, 40.25], [140.25, 40.15], [140.38, 40.2], [140.25, 40.5], [140.35, 40.75], [140.32, 40.82], [139.97, 40.97], [139.75, 41.5], [139.97, 42.03], [140.5, 42.25], [140.75, 42.15], [141.0, 42.25], [141.25, 42.15], [141.5, 42.25], [142.03, 42.03], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.15, 40.75], [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], [142.03, 38.47], [141.68, 38.32], [141.54, 38.0], [141.75, 37.5], [141.53, 36.97], [141.18, 36.82], [141.15, 36.75], [141.25, 36.5], [141.04, 36.0], [141.25, 35.5], [141.03, 34.97], [140.68, 34.82], [140.53, 34.47], [140.0, 34.25], [139.47, 34.47], [139.32, 34.82], [139.25, 34.85], [139.0, 34.75], [138.47, 34.97], [138.32, 35.32], [137.97, 35.47], [137.75, 36.0], [137.85, 36.25], [137.75, 36.5]]]]}, "2022-06-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.75, 36.5], [137.97, 37.03], [138.32, 37.18], [138.35, 37.25], [138.25, 37.5], [138.47, 38.03], [138.82, 38.18], [138.97, 38.53], [139.32, 38.68], [139.35, 38.75], [139.25, 39.0], [139.35, 39.25], [139.25, 39.5], [139.47, 40.03], [140.0, 40.25], [140.25, 40.15], [140.38, 40.2], [140.25, 40.5], [140.35, 40.75], [140.32, 40.82], [139.97, 40.97], [139.75, 41.5], [139.97, 42.03], [140.5, 42.25], [140.75, 42.15], [141.0, 42.25], [141.25, 42.15], [141.5, 42.25], [142.03, 42.03], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.15, 40.75], [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], [142.03, 38.47], [141.68, 38.32], [141.54, 38.0], [141.75, 37.5], [141.53, 36.97], [141.18, 36.82], [141.15, 36.75], [141.25, 36.5], [141.04, 36.0], [141.25, 35.5], [141.03, 34.97], [140.68, 34.82], [140.53, 34.47], [140.0, 34.25], [139.47, 34.47], [139.32, 34.82], [139.25, 34.85], [139.0, 34.75], [138.47, 34.97], [138.32, 35.32], [137.97, 35.47], [137.75, 36.0], [137.85, 36.25], [137.75, 36.5]]]]}, "2022-06-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.75, 36.5], [137.97, 37.03], [138.32, 37.18], [138.35, 37.25], [138.25, 37.5], [138.47, 38.03], [138.82, 38.18], [138.97, 38.53], [139.32, 38.68], [139.35, 38.75], [139.25, 39.0], [139.35, 39.25], [139.25, 39.5], [139.47, 40.03], [140.0, 40.25], [140.25, 40.15], [140.5, 40.25], [140.75, 40.15], [140.82, 40.18], [140.85, 40.25], [140.82, 40.32], [140.47, 40.47], [140.32, 40.82], [139.97, 40.97], [139.75, 41.5], [139.97, 42.03], [140.5, 42.25], [140.75, 42.15], [141.0, 42.25], [141.25, 42.15], [141.5, 42.25], [142.03, 42.03], [142.25, 41.5], [142.15, 41.25], [142.25, 41.0], [142.15, 40.75], [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], [142.03, 38.47], [141.68, 38.32], [141.54, 38.0], [141.75, 37.5], [141.53, 36.97], [141.18, 36.82], [141.15, 36.75], [141.25, 36.5], [141.04, 36.0], [141.25, 35.5], [141.03, 34.97], [140.68, 34.82], [140.53, 34.47], [140.0, 34.25], [139.47, 34.47], [139.32, 34.82], [139.25, 34.85], [139.0, 34.75], [138.47, 34.97], [138.32, 35.32], [137.97, 35.47], [137.75, 36.0], [137.85, 36.25], [137.75, 36.5]]]]}, "2022-06-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[139.97, 37.53], [140.5, 37.75], [141.03, 37.53], [141.25, 37.0], [141.03, 36.47], [140.5, 36.25], [139.97, 36.47], [139.75, 37.0], [139.97, 37.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.21130828491647}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.0663831676810425}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [12.719205127163264, 13.022899869192486, 12.862950021870233, 12.989753323811897, 13.72199764102345, 15.31967262364816]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [12.719205127163264, 10.544555211256068, 9.251499040407055, 8.139676698741141, 10.718221377317946, 15.31967262364816]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.2634182884318648, -3.4095353498643513, -4.372131896599253, -4.332017087837282, -3.6979203702435206, -3.0487458879944143]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.2634182884318648, -4.513772224009472, -5.991194025579205, -7.21130828491647, -5.5308365334967675, -3.0487458879944143]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4154406299510738, -1.4700712458731406, -2.1478224653956457, -2.1606213336840936, -1.8255977628384674, -1.3361201381698835]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4154406299510738, -1.6701908621390678, -2.7648476655298815, -2.7492032285079024, -2.5405192004910586, -1.3361201381698835]}}