{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:52:16.580370", "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": "2013-Jan-25_to_2013-Jan-27_133.0_37.0"}, "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": 2013010000814}, "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": "January 25 2013"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 27 2013"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 80000.32234409847}, "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"]}, "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": 37.0}, "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": 133.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "133.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 129.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 135.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 34.25}, "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": {"2013-01-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.97, 34.47], [128.75, 35.0], [128.97, 35.53], [129.5, 35.75], [129.75, 35.65], [130.0, 35.75], [130.25, 35.65], [130.38, 35.7], [130.25, 36.0], [130.47, 36.53], [130.82, 36.68], [130.97, 37.03], [131.32, 37.18], [131.35, 37.25], [131.25, 37.5], [131.47, 38.03], [132.0, 38.25], [132.25, 38.15], [132.5, 38.25], [133.03, 38.03], [133.18, 37.68], [133.25, 37.65], [133.5, 37.75], [134.03, 37.53], [134.18, 37.18], [134.25, 37.15], [134.5, 37.25], [135.03, 37.03], [135.18, 36.68], [135.25, 36.65], [135.5, 36.75], [136.03, 36.53], [136.25, 36.0], [136.03, 35.47], [135.5, 35.25], [135.25, 35.35], [135.0, 35.25], [134.75, 35.35], [134.5, 35.25], [134.25, 35.35], [134.0, 35.25], [133.75, 35.35], [133.68, 35.32], [133.53, 34.97], [133.0, 34.75], [132.75, 34.85], [132.68, 34.82], [132.53, 34.47], [132.0, 34.25], [131.75, 34.35], [131.68, 34.32], [131.53, 33.97], [131.0, 33.75], [130.47, 33.97], [130.32, 34.32], [130.25, 34.35], [130.0, 34.25], [129.75, 34.35], [129.5, 34.25], [128.97, 34.47]]]]}, "2013-01-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.97, 34.47], [128.75, 35.0], [128.97, 35.53], [129.5, 35.75], [129.75, 35.65], [130.0, 35.75], [130.25, 35.65], [130.38, 35.7], [130.25, 36.0], [130.47, 36.53], [130.82, 36.68], [130.97, 37.03], [131.32, 37.18], [131.35, 37.25], [131.25, 37.5], [131.47, 38.03], [132.0, 38.25], [132.25, 38.15], [132.5, 38.25], [133.03, 38.03], [133.18, 37.68], [133.25, 37.65], [133.5, 37.75], [134.03, 37.53], [134.18, 37.18], [134.25, 37.15], [134.5, 37.25], [135.03, 37.03], [135.18, 36.68], [135.25, 36.65], [135.5, 36.75], [136.03, 36.53], [136.25, 36.0], [136.03, 35.47], [135.5, 35.25], [135.25, 35.35], [135.0, 35.25], [134.75, 35.35], [134.5, 35.25], [134.25, 35.35], [134.0, 35.25], [133.75, 35.35], [133.68, 35.32], [133.53, 34.97], [133.0, 34.75], [132.75, 34.85], [132.68, 34.82], [132.53, 34.47], [132.0, 34.25], [131.75, 34.35], [131.68, 34.32], [131.53, 33.97], [131.0, 33.75], [130.47, 33.97], [130.32, 34.32], [130.25, 34.35], [130.0, 34.25], [129.75, 34.35], [129.5, 34.25], [128.97, 34.47]]]]}, "2013-01-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[128.97, 34.47], [128.75, 35.0], [128.97, 35.53], [129.5, 35.75], [129.75, 35.65], [130.0, 35.75], [130.25, 35.65], [130.38, 35.7], [130.25, 36.0], [130.47, 36.53], [130.82, 36.68], [130.97, 37.03], [131.32, 37.18], [131.35, 37.25], [131.25, 37.5], [131.47, 38.03], [132.0, 38.25], [132.25, 38.15], [132.5, 38.25], [133.03, 38.03], [133.18, 37.68], [133.25, 37.65], [133.5, 37.75], [134.03, 37.53], [134.18, 37.18], [134.25, 37.15], [134.5, 37.25], [135.03, 37.03], [135.18, 36.68], [135.25, 36.65], [135.5, 36.75], [136.03, 36.53], [136.25, 36.0], [136.03, 35.47], [135.5, 35.25], [135.25, 35.35], [135.0, 35.25], [134.75, 35.35], [134.5, 35.25], [134.25, 35.35], [134.0, 35.25], [133.75, 35.35], [133.68, 35.32], [133.53, 34.97], [133.0, 34.75], [132.75, 34.85], [132.68, 34.82], [132.53, 34.47], [132.0, 34.25], [131.75, 34.35], [131.68, 34.32], [131.53, 33.97], [131.0, 33.75], 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maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.459799503067188, -5.200888554037988, -4.481538938059771]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.8337058730730484, -1.6216996633366858, -1.342775677059853]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.31629604700783, -1.6967136156262457, -1.4789031398820922]}}