{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:07:49.980595", "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": "2017-May-22_to_2017-May-25_133.0_44.5"}, "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": 2017050000590}, "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": "May 22 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 25 2017"}, "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": 65569.33026983582}, "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": ["China", "Russian Federation"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "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": []}, "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": 44.5}, "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": 133.0}, "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": 131.75}, "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": 43.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 48.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-05-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.75, 46.0], [131.97, 46.53], [132.5, 46.75], [133.03, 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45.15], [134.0, 45.25], [134.53, 45.03], [134.75, 44.5], [134.53, 43.97], [134.0, 43.75], [133.75, 43.85], [133.68, 43.82], [133.53, 43.47], [133.0, 43.25], [132.75, 43.35], [132.5, 43.25], [131.97, 43.47], [131.75, 44.0], [131.97, 44.53], [132.32, 44.68], [132.35, 44.75], [132.25, 45.0], [132.35, 45.25], [132.32, 45.32], [131.97, 45.47], [131.75, 46.0], [131.85, 46.25], [131.82, 46.32], [131.47, 46.47], [131.25, 47.0]]]]}, "2017-05-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[131.25, 47.0], [131.47, 47.53], [131.82, 47.68], [131.97, 48.03], [132.5, 48.25], [132.75, 48.15], [132.82, 48.18], [132.97, 48.53], [133.32, 48.68], [133.47, 49.03], [134.0, 49.25], [134.25, 49.15], [134.5, 49.25], [134.75, 49.15], [135.0, 49.25], [135.53, 49.03], [135.68, 48.68], [136.03, 48.53], [136.25, 48.0], [136.15, 47.75], [136.25, 47.5], [136.03, 46.97], [135.5, 46.75], [135.25, 46.85], [135.18, 46.82], [135.03, 46.47], [134.5, 46.25], [134.25, 46.35], [134.0, 46.25], [133.75, 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{"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5133382228376597, -2.003237348816283, -1.9586106718508998, -2.005513351119346]}}