{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:56:02.798441", "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": "2014-Apr-04_to_2014-Apr-06_133.5_34.5"}, "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": 2014040000185}, "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": "April 04 2014"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 06 2014"}, "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": 56054.94130780088}, "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", "Seto Naikai or Inland 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": 34.5}, "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": 133.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "133.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 131.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 134.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2014-04-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, 35.03], [131.32, 35.18], [131.47, 35.53], [132.0, 35.75], [132.25, 35.65], [132.32, 35.68], [132.47, 36.03], [133.0, 36.25], [133.25, 36.15], [133.5, 36.25], [133.75, 36.15], [134.0, 36.25], [134.53, 36.03], [134.68, 35.68], [135.03, 35.53], [135.25, 35.0], [135.03, 34.47], [134.5, 34.25], [134.25, 34.35], [134.18, 34.32], [134.04, 34.0], [134.25, 33.5], [134.03, 32.97], [133.5, 32.75], [133.25, 32.85], [133.0, 32.75], [132.75, 32.85], [132.5, 32.75], [132.25, 32.85], [132.0, 32.75], [131.75, 32.85], [131.5, 32.75], [130.97, 32.97], [130.75, 33.5], [130.96, 34.0], [130.75, 34.5], [130.97, 35.03]]]]}, "2014-04-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, 35.03], [131.32, 35.18], [131.47, 35.53], [132.0, 35.75], [132.25, 35.65], [132.32, 35.68], [132.47, 36.03], [133.0, 36.25], [133.25, 36.15], [133.5, 36.25], [133.75, 36.15], [134.0, 36.25], [134.53, 36.03], [134.68, 35.68], [135.03, 35.53], [135.25, 35.0], [135.03, 34.47], [134.5, 34.25], [134.25, 34.35], [134.18, 34.32], [134.04, 34.0], [134.25, 33.5], [134.03, 32.97], [133.5, 32.75], [133.25, 32.85], [133.0, 32.75], [132.75, 32.85], [132.5, 32.75], [132.25, 32.85], [132.0, 32.75], [131.75, 32.85], [131.5, 32.75], [130.97, 32.97], [130.75, 33.5], [130.96, 34.0], [130.75, 34.5], [130.97, 35.03]]]]}, "2014-04-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.97, 35.03], [131.32, 35.18], [131.47, 35.53], [132.0, 35.75], [132.25, 35.65], [132.32, 35.68], [132.47, 36.03], [133.0, 36.25], [133.25, 36.15], [133.5, 36.25], [133.75, 36.15], [134.0, 36.25], [134.53, 36.03], [134.68, 35.68], [135.03, 35.53], [135.25, 35.0], [135.03, 34.47], [134.5, 34.25], [134.25, 34.35], [134.18, 34.32], [134.04, 34.0], [134.25, 33.5], [134.03, 32.97], [133.5, 32.75], [133.25, 32.85], [133.0, 32.75], [132.75, 32.85], [132.5, 32.75], [132.25, 32.85], [132.0, 32.75], [131.75, 32.85], [131.5, 32.75], [130.97, 32.97], [130.75, 33.5], [130.96, 34.0], [130.75, 34.5], [130.97, 35.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.216565435040593}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.88828629466137}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.208669961968894, 7.069730721418807, 6.591486639226446]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.9474334473012505, 3.717210929190344, 3.373884457681754]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.465823095964063, -4.766167077712956, -5.43286871030709]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.679577109141235, -6.220821535192329, -7.216565435040593]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5906710281462273, -1.7087911810452132, -2.007195819567689]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7594652499825094, -2.0328814260361896, -2.2976877526525357]}}