{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:20:03.049204", "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-May-12_to_2022-May-17_131.0_51.0"}, "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": 2022050000512}, "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 12 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 17 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": 117213.86634678527}, "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": ["Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe"]}, "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": 51.0}, "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": 131.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "131.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 130.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 134.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[129.85, 50.75], [129.75, 51.0], [129.97, 51.53], [130.32, 51.68], [130.47, 52.03], [131.0, 52.25], [131.25, 52.15], 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of all IPCC regions affected", "value": ["E.Siberia", "Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.47, 51.53], [131.0, 51.75], [131.53, 51.53], [131.75, 51.0], [131.53, 50.47], [131.0, 50.25], [130.47, 50.47], [130.25, 51.0], [130.47, 51.53]]]]}, "2022-05-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.47, 51.53], [131.0, 51.75], [131.53, 51.53], [131.75, 51.0], [131.53, 50.47], [131.0, 50.25], [130.47, 50.47], [130.25, 51.0], [130.47, 51.53]]]]}, "2022-05-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.47, 51.53], [131.0, 51.75], [131.53, 51.53], [131.75, 51.0], [131.53, 50.47], [131.0, 50.25], [130.47, 50.47], [130.25, 51.0], [130.47, 51.53]]]]}, "2022-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.25, 50.0], [129.47, 50.53], [129.82, 50.68], [129.85, 50.75], [129.75, 51.0], [129.97, 51.53], [130.32, 51.68], [130.47, 52.03], [131.0, 52.25], [131.25, 52.15], [131.32, 52.18], [131.47, 52.53], [132.0, 52.75], [132.25, 52.65], [132.32, 52.68], [132.35, 52.75], [132.25, 53.0], [132.47, 53.53], [133.0, 53.75], [133.25, 53.65], [133.32, 53.68], [133.47, 54.03], [134.0, 54.25], [134.53, 54.03], [134.68, 53.68], [135.03, 53.53], [135.25, 53.0], [135.15, 52.75], [135.25, 52.5], [135.15, 52.25], [135.25, 52.0], [135.03, 51.47], [134.68, 51.32], [134.65, 51.25], [134.75, 51.0], [134.65, 50.75], [134.68, 50.68], [135.03, 50.53], [135.25, 50.0], [135.03, 49.47], [134.68, 49.32], [134.53, 48.97], [134.0, 48.75], [133.75, 48.85], [133.5, 48.75], [133.25, 48.85], [133.18, 48.82], [133.03, 48.47], [132.5, 48.25], [132.25, 48.35], [132.0, 48.25], [131.75, 48.35], [131.5, 48.25], [131.25, 48.35], [131.0, 48.25], [130.75, 48.35], [130.5, 48.25], [129.97, 48.47], [129.82, 48.82], [129.47, 48.97], [129.25, 49.5], [129.35, 49.75], [129.25, 50.0]]]]}, "2022-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.25, 50.0], [129.47, 50.53], [129.82, 50.68], [129.85, 50.75], [129.75, 51.0], [129.97, 51.53], [130.32, 51.68], [130.47, 52.03], [131.0, 52.25], [131.25, 52.15], [131.32, 52.18], [131.47, 52.53], [132.0, 52.75], [132.25, 52.65], [132.32, 52.68], [132.35, 52.75], [132.25, 53.0], [132.47, 53.53], [133.0, 53.75], [133.25, 53.65], [133.32, 53.68], [133.47, 54.03], [134.0, 54.25], [134.53, 54.03], [134.68, 53.68], [135.03, 53.53], [135.25, 53.0], [135.15, 52.75], [135.25, 52.5], [135.15, 52.25], [135.25, 52.0], [135.03, 51.47], [134.68, 51.32], [134.65, 51.25], [134.75, 51.0], [134.65, 50.75], [134.68, 50.68], [135.03, 50.53], [135.25, 50.0], [135.03, 49.47], [134.68, 49.32], [134.53, 48.97], [134.0, 48.75], [133.75, 48.85], [133.5, 48.75], [133.25, 48.85], [133.18, 48.82], [133.03, 48.47], [132.5, 48.25], [132.25, 48.35], [132.0, 48.25], [131.75, 48.35], [131.5, 48.25], [131.25, 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standardized t2m anomalies.", "value": [-1.2531990843338396, -1.4593824932497417, -1.2734983196908258, -2.0192415855794126, -1.810162847922075, -1.9085633772625346]}}