{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:49:49.980305", "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-Mar-18_to_2012-Mar-23_147.5_48.5"}, "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": 2012030001117}, "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": "March 18 2012"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "March 23 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": 590955.1733333382}, "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", "Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "N.Pacific-Ocean", "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": ["Japan Sea", "North Pacific Ocean", "Sea of Okhotsk"]}, "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": 48.5}, "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": 147.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "147.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 135.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 155.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2012-03-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, 44.53], [135.82, 44.68], [135.97, 45.03], [136.32, 45.18], [136.47, 45.53], [137.0, 45.75], [137.25, 45.65], [137.32, 45.68], [137.35, 45.75], [137.25, 46.0], [137.47, 46.53], [137.82, 46.68], [137.97, 47.03], [138.32, 47.18], [138.35, 47.25], [138.25, 47.5], [138.47, 48.03], [139.0, 48.25], [139.25, 48.15], [139.32, 48.18], [139.47, 48.53], [140.0, 48.75], [140.25, 48.65], [140.32, 48.68], [140.47, 49.03], [141.0, 49.25], [141.25, 49.15], [141.5, 49.25], [142.03, 49.03], [142.25, 48.5], [142.35, 48.75], [142.25, 49.0], [142.47, 49.53], [143.0, 49.75], [143.25, 49.65], [143.5, 49.75], [143.75, 49.65], [144.0, 49.75], [144.53, 49.53], [144.68, 49.18], [144.75, 49.15], [145.0, 49.25], [145.5, 49.04], [145.82, 49.18], [145.97, 49.53], [146.32, 49.68], [146.47, 50.03], [146.82, 50.18], [146.97, 50.53], [147.32, 50.68], [147.35, 50.75], [147.25, 51.0], [147.35, 51.25], [147.25, 51.5], [147.35, 51.75], [147.25, 52.0], [147.35, 52.25], [147.25, 52.5], [147.35, 52.75], [147.25, 53.0], [147.47, 53.53], [148.0, 53.75], [148.25, 53.65], [148.5, 53.75], [149.03, 53.53], [149.18, 53.18], [149.53, 53.03], [149.75, 52.5], [149.65, 52.25], [149.68, 52.18], [150.03, 52.03], [150.18, 51.68], [150.53, 51.53], [150.75, 51.0], [150.65, 50.75], [150.75, 50.5], [150.53, 49.97], [150.18, 49.82], [150.03, 49.47], [149.68, 49.32], [149.53, 48.97], [149.18, 48.82], [149.15, 48.75], [149.25, 48.5], [149.15, 48.25], [149.25, 48.0], [149.15, 47.75], [149.25, 47.5], [149.03, 46.97], [148.68, 46.82], [148.53, 46.47], [148.18, 46.32], [148.03, 45.97], [147.5, 45.75], [147.25, 45.85], [147.0, 45.75], [146.75, 45.85], [146.5, 45.75], [145.97, 45.97], [145.75, 46.5], [145.65, 46.25], [145.75, 46.0], [145.53, 45.47], [145.18, 45.32], [145.04, 45.0], [145.18, 44.68], [145.53, 44.53], [145.75, 44.0], [145.53, 43.47], [145.18, 43.32], [145.15, 43.25], [145.25, 43.0], [145.03, 42.47], [144.5, 42.25], [144.25, 42.35], [144.0, 42.25], [143.47, 42.47], [143.32, 42.82], [143.0, 42.96], [142.68, 42.82], [142.65, 42.75], [142.75, 42.5], [142.53, 41.97], [142.18, 41.82], [142.03, 41.47], [141.5, 41.25], [141.25, 41.35], [141.0, 41.25], [140.75, 41.35], [140.5, 41.25], [139.97, 41.47], [139.82, 41.82], [139.75, 41.85], [139.68, 41.82], [139.53, 41.47], [139.0, 41.25], [138.47, 41.47], [138.32, 41.82], [138.25, 41.85], [138.0, 41.75], [137.75, 41.85], [137.5, 41.75], [136.97, 41.97], [136.75, 42.5], [136.85, 42.75], [136.75, 43.0], [136.88, 43.3], [136.75, 43.35], [136.68, 43.32], [136.53, 42.97], [136.0, 42.75], [135.47, 42.97], [135.25, 43.5], [135.35, 43.75], [135.25, 44.0], [135.47, 44.53]], [[142.15, 48.25], [142.18, 48.18], [142.25, 48.15], [142.32, 48.18], [142.35, 48.25], [142.25, 48.5], [142.15, 48.25]], [[145.93, 46.93], [145.68, 46.82], [145.65, 46.75], [145.75, 46.5], [145.93, 46.93]], [[146.82, 47.32], [146.75, 47.35], [146.5, 47.25], [146.75, 47.15], [146.82, 47.18], [146.85, 47.25], [146.82, 47.32]], [[146.25, 47.35], [146.18, 47.32], [146.07, 47.07], [146.5, 47.25], [146.25, 47.35]]]]}, "2012-03-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, 44.53], [135.82, 44.68], [135.97, 45.03], [136.32, 45.18], [136.47, 45.53], [137.0, 45.75], [137.25, 45.65], [137.32, 45.68], [137.35, 45.75], [137.25, 46.0], [137.47, 46.53], [137.82, 46.68], [137.97, 47.03], [138.32, 47.18], [138.35, 47.25], [138.25, 47.5], [138.47, 48.03], [139.0, 48.25], [139.25, 48.15], [139.32, 48.18], [139.47, 48.53], [140.0, 48.75], [140.25, 48.65], [140.32, 48.68], [140.47, 49.03], [141.0, 49.25], [141.25, 49.15], [141.5, 49.25], [142.03, 49.03], [142.25, 48.5], [142.35, 48.75], [142.25, 49.0], [142.47, 49.53], [143.0, 49.75], [143.25, 49.65], [143.5, 49.75], [143.75, 49.65], [144.0, 49.75], [144.53, 49.53], [144.68, 49.18], [144.75, 49.15], [145.0, 49.25], [145.5, 49.04], [145.82, 49.18], [145.97, 49.53], [146.32, 49.68], [146.47, 50.03], [146.82, 50.18], [146.97, 50.53], [147.32, 50.68], [147.35, 50.75], [147.25, 51.0], [147.35, 51.25], [147.25, 51.5], [147.35, 51.75], [147.25, 52.0], [147.35, 52.25], [147.25, 52.5], [147.35, 52.75], [147.25, 53.0], [147.47, 53.53], [148.0, 53.75], [148.25, 53.65], [148.5, 53.75], [149.03, 53.53], [149.18, 53.18], [149.53, 53.03], [149.75, 52.5], [149.65, 52.25], [149.68, 52.18], [150.03, 52.03], [150.18, 51.68], [150.53, 51.53], [150.75, 51.0], [150.65, 50.75], [150.75, 50.5], [150.53, 49.97], [150.18, 49.82], [150.03, 49.47], [149.68, 49.32], [149.65, 49.25], [149.68, 49.18], [149.75, 49.15], [150.0, 49.25], [150.25, 49.15], [150.5, 49.25], [150.75, 49.15], [150.82, 49.18], [150.97, 49.53], [151.32, 49.68], [151.35, 49.75], [151.25, 50.0], [151.47, 50.53], [152.0, 50.75], [152.25, 50.65], [152.5, 50.75], [152.75, 50.65], [153.0, 50.75], [153.25, 50.65], [153.5, 50.75], [154.03, 50.53], [154.25, 50.0], [154.15, 49.75], [154.18, 49.68], [154.53, 49.53], [154.68, 49.18], [155.03, 49.03], [155.25, 48.5], [155.15, 48.25], [155.18, 48.18], [155.53, 48.03], [155.75, 47.5], [155.53, 46.97], [155.0, 46.75], [154.75, 46.85], [154.5, 46.75], [154.25, 46.85], [154.0, 46.75], [153.75, 46.85], [153.5, 46.75], [153.25, 46.85], [153.0, 46.75], [152.75, 46.85], [152.5, 46.75], [151.97, 46.97], [151.82, 47.32], [151.75, 47.35], [151.5, 47.25], [151.25, 47.35], [151.0, 47.25], [150.47, 47.47], [150.32, 47.82], [150.25, 47.85], [150.0, 47.75], [149.75, 47.85], [149.5, 47.75], [149.25, 47.85], [149.18, 47.82], [149.15, 47.75], [149.25, 47.5], [149.03, 46.97], [148.68, 46.82], [148.53, 46.47], [148.18, 46.32], [148.03, 45.97], [147.5, 45.75], [147.25, 45.85], [147.0, 45.75], [146.75, 45.85], [146.5, 45.75], [145.97, 45.97], [145.75, 46.5], [145.65, 46.25], [145.75, 46.0], [145.53, 45.47], [145.18, 45.32], [145.04, 45.0], [145.18, 44.68], [145.53, 44.53], [145.75, 44.0], [145.53, 43.47], [145.18, 43.32], [145.15, 43.25], [145.25, 43.0], [145.03, 42.47], [144.5, 42.25], [144.25, 42.35], [144.0, 42.25], [143.75, 42.35], [143.5, 42.25], [142.97, 42.47], [142.8, 42.88], [142.68, 42.82], [142.65, 42.75], [142.75, 42.5], [142.53, 41.97], [142.18, 41.82], [142.03, 41.47], [141.5, 41.25], [141.25, 41.35], [141.0, 41.25], [140.75, 41.35], [140.5, 41.25], [139.97, 41.47], [139.82, 41.82], [139.75, 41.85], [139.68, 41.82], [139.53, 41.47], [139.0, 41.25], [138.47, 41.47], [138.32, 41.82], [138.25, 41.85], [138.0, 41.75], [137.75, 41.85], [137.5, 41.75], [136.97, 41.97], [136.75, 42.5], [136.85, 42.75], [136.75, 43.0], [136.88, 43.3], [136.75, 43.35], [136.68, 43.32], [136.53, 42.97], [136.0, 42.75], [135.47, 42.97], [135.25, 43.5], [135.35, 43.75], [135.25, 44.0], [135.47, 44.53]], [[142.15, 48.25], [142.18, 48.18], [142.25, 48.15], [142.32, 48.18], [142.35, 48.25], [142.25, 48.5], [142.15, 48.25]], [[145.93, 46.93], [145.68, 46.82], [145.65, 46.75], [145.75, 46.5], [145.93, 46.93]], [[146.82, 47.32], [146.75, 47.35], [146.5, 47.25], [146.75, 47.15], [146.82, 47.18], [146.85, 47.25], [146.82, 47.32]], [[146.25, 47.35], [146.18, 47.32], [146.07, 47.07], [146.5, 47.25], [146.25, 47.35]]]]}, "2012-03-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.47, 44.53], [135.82, 44.68], [135.97, 45.03], [136.32, 45.18], [136.47, 45.53], [137.0, 45.75], [137.25, 45.65], [137.32, 45.68], [137.35, 45.75], [137.25, 46.0], [137.47, 46.53], [137.82, 46.68], [137.97, 47.03], [138.32, 47.18], [138.35, 47.25], [138.25, 47.5], [138.47, 48.03], [139.0, 48.25], [139.25, 48.15], [139.32, 48.18], [139.47, 48.53], [140.0, 48.75], [140.25, 48.65], [140.32, 48.68], [140.47, 49.03], [141.0, 49.25], [141.25, 49.15], [141.5, 49.25], [142.03, 49.03], [142.25, 48.5], [142.35, 48.75], [142.25, 49.0], [142.47, 49.53], [143.0, 49.75], [143.25, 49.65], [143.5, 49.75], [143.75, 49.65], [144.0, 49.75], [144.53, 49.53], [144.68, 49.18], [144.75, 49.15], [145.0, 49.25], [145.5, 49.04], [145.82, 49.18], [145.97, 49.53], [146.32, 49.68], [146.47, 50.03], [146.82, 50.18], [146.97, 50.53], [147.32, 50.68], [147.35, 50.75], [147.25, 51.0], [147.35, 51.25], [147.25, 51.5], [147.35, 51.75], [147.25, 52.0], [147.35, 52.25], [147.25, 52.5], [147.35, 52.75], [147.25, 53.0], [147.47, 53.53], [148.0, 53.75], [148.25, 53.65], [148.5, 53.75], [149.03, 53.53], [149.18, 53.18], [149.53, 53.03], [149.75, 52.5], [149.65, 52.25], [149.68, 52.18], [150.03, 52.03], [150.18, 51.68], [150.53, 51.53], [150.75, 51.0], [150.65, 50.75], [150.75, 50.5], [150.53, 49.97], [150.18, 49.82], [150.03, 49.47], [149.68, 49.32], [149.65, 49.25], [149.68, 49.18], [149.75, 49.15], [150.0, 49.25], [150.25, 49.15], [150.5, 49.25], [150.75, 49.15], [150.82, 49.18], [150.97, 49.53], [151.32, 49.68], [151.35, 49.75], [151.25, 50.0], [151.47, 50.53], [152.0, 50.75], [152.25, 50.65], [152.5, 50.75], [152.75, 50.65], [153.0, 50.75], [153.25, 50.65], [153.5, 50.75], [154.03, 50.53], [154.25, 50.0], [154.15, 49.75], [154.18, 49.68], [154.53, 49.53], [154.68, 49.18], [155.03, 49.03], [155.25, 48.5], [155.15, 48.25], [155.18, 48.18], [155.53, 48.03], [155.75, 47.5], [155.53, 46.97], [155.0, 46.75], [154.75, 46.85], [154.5, 46.75], [154.25, 46.85], [154.0, 46.75], [153.75, 46.85], [153.5, 46.75], [153.25, 46.85], [153.0, 46.75], [152.75, 46.85], [152.5, 46.75], [151.97, 46.97], [151.82, 47.32], [151.75, 47.35], [151.5, 47.25], [151.25, 47.35], [151.0, 47.25], [150.47, 47.47], [150.32, 47.82], [150.25, 47.85], [150.0, 47.75], [149.75, 47.85], [149.5, 47.75], [149.25, 47.85], [149.18, 47.82], [149.15, 47.75], [149.25, 47.5], [149.03, 46.97], [148.68, 46.82], [148.53, 46.47], [148.18, 46.32], [148.03, 45.97], [147.5, 45.75], [147.25, 45.85], [147.0, 45.75], [146.75, 45.85], [146.5, 45.75], [145.97, 45.97], [145.75, 46.5], [145.65, 46.25], [145.75, 46.0], [145.53, 45.47], [145.18, 45.32], [145.04, 45.0], [145.18, 44.68], [145.53, 44.53], [145.75, 44.0], [145.53, 43.47], [145.18, 43.32], [145.15, 43.25], [145.25, 43.0], [145.03, 42.47], [144.5, 42.25], [144.25, 42.35], [144.0, 42.25], [143.75, 42.35], [143.5, 42.25], [142.97, 42.47], [142.8, 42.88], [142.68, 42.82], [142.65, 42.75], [142.75, 42.5], [142.53, 41.97], [142.18, 41.82], [142.03, 41.47], [141.5, 41.25], [141.25, 41.35], [141.0, 41.25], [140.75, 41.35], [140.5, 41.25], [139.97, 41.47], [139.82, 41.82], [139.75, 41.85], [139.68, 41.82], [139.53, 41.47], [139.0, 41.25], [138.47, 41.47], [138.32, 41.82], [138.25, 41.85], [138.0, 41.75], [137.75, 41.85], [137.5, 41.75], [136.97, 41.97], [136.75, 42.5], [136.85, 42.75], [136.75, 43.0], [136.88, 43.3], [136.75, 43.35], [136.68, 43.32], [136.53, 42.97], [136.0, 42.75], [135.47, 42.97], [135.25, 43.5], [135.35, 43.75], [135.25, 44.0], [135.47, 44.53]], [[142.15, 48.25], [142.18, 48.18], [142.25, 48.15], [142.32, 48.18], [142.35, 48.25], [142.25, 48.5], [142.15, 48.25]], [[145.93, 46.93], [145.68, 46.82], [145.65, 46.75], [145.75, 46.5], [145.93, 46.93]], [[146.82, 47.32], [146.75, 47.35], [146.5, 47.25], [146.75, 47.15], [146.82, 47.18], [146.85, 47.25], [146.82, 47.32]], [[146.25, 47.35], [146.18, 47.32], [146.07, 47.07], [146.5, 47.25], [146.25, 47.35]]]]}, "2012-03-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.97, 42.47], [142.75, 43.0], [142.97, 43.53], [143.5, 43.75], [144.03, 43.53], [144.25, 43.0], [144.03, 42.47], [143.5, 42.25], [142.97, 42.47]]], [[[147.5, 49.75], [147.75, 49.65], [148.0, 49.75], [148.5, 49.54], [149.0, 49.75], [149.53, 49.53], [149.68, 49.18], [149.75, 49.15], [150.0, 49.25], [150.25, 49.15], [150.5, 49.25], [150.75, 49.15], [150.82, 49.18], [150.97, 49.53], [151.32, 49.68], [151.35, 49.75], [151.25, 50.0], [151.47, 50.53], [152.0, 50.75], [152.25, 50.65], [152.5, 50.75], [152.75, 50.65], [153.0, 50.75], [153.25, 50.65], [153.5, 50.75], [154.03, 50.53], [154.25, 50.0], [154.15, 49.75], [154.18, 49.68], [154.53, 49.53], [154.68, 49.18], [155.03, 49.03], [155.25, 48.5], [155.15, 48.25], [155.18, 48.18], [155.53, 48.03], [155.75, 47.5], [155.53, 46.97], [155.0, 46.75], [154.75, 46.85], [154.5, 46.75], [154.25, 46.85], [154.0, 46.75], [153.75, 46.85], [153.5, 46.75], [153.25, 46.85], [153.0, 46.75], [152.75, 46.85], [152.5, 46.75], [151.97, 46.97], [151.82, 47.32], [151.75, 47.35], [151.5, 47.25], [151.25, 47.35], [151.0, 47.25], [150.47, 47.47], [150.32, 47.82], [150.25, 47.85], [150.0, 47.75], [149.75, 47.85], [149.5, 47.75], [149.25, 47.85], [149.0, 47.75], [148.75, 47.85], [148.5, 47.75], [148.25, 47.85], [148.0, 47.75], [147.75, 47.85], [147.5, 47.75], [146.97, 47.97], [146.75, 48.5], [146.85, 48.75], [146.75, 49.0], [146.97, 49.53], [147.5, 49.75]]]]}, "2012-03-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[148.0, 49.75], [148.53, 49.53], [148.68, 49.18], [149.03, 49.03], [149.25, 48.5], [149.03, 47.97], [148.5, 47.75], [148.25, 47.85], [148.0, 47.75], [147.75, 47.85], [147.5, 47.75], [146.97, 47.97], [146.75, 48.5], [146.97, 49.03], [147.32, 49.18], [147.47, 49.53], [148.0, 49.75]]]]}, "2012-03-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[146.97, 47.97], [146.75, 48.5], [146.97, 49.03], [147.5, 49.25], [147.75, 49.15], [148.0, 49.25], [148.53, 49.03], [148.75, 48.5], [148.53, 47.97], [148.0, 47.75], [147.75, 47.85], [147.5, 47.75], [146.97, 47.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.57044275266503}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.3288100824054165}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-8.161801262616962, -7.671526247468876, -5.855190396941737, -4.247750303557666, -7.401342315147588, -7.15937373550878]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-15.281457259657031, -15.205084557694988, -11.416677278533143, -9.225160405310305, -7.962455330996875, -7.433030415196868]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.357486803986735, -5.995370919202836, -4.250092959576346, -2.7651630693523215, -4.01177140934837, -3.8062026292955977]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.505574909908944, -9.57044275266503, -6.306371813802002, -4.957107915351116, -4.380461739272221, -3.866388734140344]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-2.550624729934534, -2.4167393033465214, -1.760202616882891, -1.4696526432556787, -1.484452827096174, -1.4715078957790042]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-3.8849440228045147, -4.031368181280805, -2.6788657410564998, -1.7255411422076983, -1.6335824694562335, -1.487785370019428]}}