{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:57:01.997906", "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": "2024-Jan-16_to_2024-Jan-20_127.5_65.5"}, "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": 2024010000455}, "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 16 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 20 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 103562.01706250329}, "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": 65.5}, "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": 127.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "127.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 124.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 134.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 70.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[131.09, 65.11], [131.04, 65.0], [131.25, 64.5], [131.15, 64.25], [131.25, 64.0], [131.03, 63.47], [130.5, 63.25], [130.25, 63.35], [130.0, 63.25], [129.75, 63.35], [129.5, 63.25], [129.25, 63.35], [129.0, 63.25], [128.75, 63.35], [128.5, 63.25], [127.97, 63.47], [127.82, 63.82], [127.75, 63.85], [127.5, 63.75], [127.25, 63.85], [127.0, 63.75], [126.47, 63.97], [126.32, 64.32], [125.97, 64.47], [125.82, 64.82], [125.47, 64.97], [125.32, 65.32], [124.97, 65.47], [124.82, 65.82], [124.75, 65.85], [124.5, 65.75], [124.25, 65.85], [124.0, 65.75], [123.47, 65.97], [123.25, 66.5], [123.35, 66.75], [123.25, 67.0], [123.47, 67.53], [124.0, 67.75], [124.25, 67.65], [124.5, 67.75], [124.75, 67.65], [125.0, 67.75], [125.25, 67.65], [125.5, 67.75], [125.75, 67.65], [126.0, 67.75], [126.25, 67.65], [126.32, 67.68], [126.35, 67.75], [126.25, 68.0], [126.47, 68.53], [127.0, 68.75], [127.25, 68.65], [127.5, 68.75], [128.0, 68.54], [128.32, 68.68], [128.35, 68.75], [128.25, 69.0], [128.35, 69.25], [128.25, 69.5], [128.35, 69.75], [128.25, 70.0], [128.47, 70.53], [129.0, 70.75], [129.25, 70.65], [129.5, 70.75], [129.75, 70.65], [130.0, 70.75], [130.25, 70.65], [130.5, 70.75], [131.03, 70.53], [131.18, 70.18], [131.53, 70.03], [131.75, 69.5], [131.53, 68.97], [131.18, 68.82], [131.03, 68.47], [130.68, 68.32], [130.65, 68.25], [130.68, 68.18], [131.03, 68.03], [131.25, 67.5], [131.13, 67.2], [131.25, 67.15], [131.32, 67.18], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.32, 67.68], [132.47, 68.03], [133.0, 68.25], [133.25, 68.15], [133.5, 68.25], [133.75, 68.15], [134.0, 68.25], [134.53, 68.03], [134.75, 67.5], [134.53, 66.97], [134.0, 66.75], [133.75, 66.85], [133.5, 66.75], [133.25, 66.85], [133.18, 66.82], [133.03, 66.47], [132.68, 66.32], [132.53, 65.97], [132.0, 65.75], [131.75, 65.85], [131.68, 65.82], [131.53, 65.47], [131.18, 65.32], [131.09, 65.11]], [[129.87, 66.2], [129.82, 66.32], [129.75, 66.35], [129.5, 66.25], [129.25, 66.35], [129.0, 66.25], [128.7, 66.38], [128.65, 66.25], [128.75, 66.0], [128.65, 65.75], [128.75, 65.5], [128.65, 65.25], [128.68, 65.18], [128.75, 65.15], [129.0, 65.25], [129.3, 65.13], [129.35, 65.25], [129.25, 65.5], [129.47, 66.03], [129.87, 66.2]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic", "E.Siberia", "Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-01-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.35, 65.25], [129.25, 65.5], [129.47, 66.03], [130.0, 66.25], [130.25, 66.15], [130.5, 66.25], [131.03, 66.03], [131.25, 65.5], [131.03, 64.97], [130.68, 64.82], [130.65, 64.75], [130.75, 64.5], [130.53, 63.97], [130.0, 63.75], [129.47, 63.97], [129.25, 64.5], [129.35, 64.75], [129.25, 65.0], [129.35, 65.25]]], [[[123.47, 67.53], [124.0, 67.75], [124.25, 67.65], [124.5, 67.75], [124.75, 67.65], [125.0, 67.75], [125.53, 67.53], [125.75, 67.0], [125.53, 66.47], [125.18, 66.32], [125.03, 65.97], [124.5, 65.75], [124.25, 65.85], [124.0, 65.75], [123.47, 65.97], [123.25, 66.5], [123.35, 66.75], [123.25, 67.0], [123.47, 67.53]]]]}, "2024-01-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.25, 67.0], [123.47, 67.53], [124.0, 67.75], [124.25, 67.65], [124.5, 67.75], [124.75, 67.65], [125.0, 67.75], [125.53, 67.53], [125.68, 67.18], [125.75, 67.15], [126.0, 67.25], [126.25, 67.15], [126.32, 67.18], [126.35, 67.25], [126.25, 67.5], [126.47, 68.03], [126.82, 68.18], [126.97, 68.53], [127.5, 68.75], [128.0, 68.54], [128.32, 68.68], [128.35, 68.75], [128.25, 69.0], [128.35, 69.25], [128.25, 69.5], [128.35, 69.75], [128.25, 70.0], [128.47, 70.53], [129.0, 70.75], [129.25, 70.65], [129.5, 70.75], [129.75, 70.65], [130.0, 70.75], [130.25, 70.65], [130.5, 70.75], [131.03, 70.53], [131.25, 70.0], [131.15, 69.75], [131.25, 69.5], [131.15, 69.25], [131.25, 69.0], [131.03, 68.47], [130.63, 68.3], [130.68, 68.18], [131.03, 68.03], [131.25, 67.5], [131.03, 66.97], [130.68, 66.82], [130.57, 66.57], [131.0, 66.75], [131.3, 66.63], [131.35, 66.75], [131.25, 67.0], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.5, 67.75], [133.03, 67.53], [133.25, 67.0], [133.03, 66.47], [132.68, 66.32], [132.53, 65.97], [132.0, 65.75], [131.7, 65.88], [131.53, 65.47], [131.18, 65.32], [131.04, 65.0], [131.25, 64.5], [131.15, 64.25], [131.25, 64.0], [131.03, 63.47], [130.5, 63.25], [130.25, 63.35], [130.0, 63.25], [129.75, 63.35], [129.5, 63.25], [128.97, 63.47], [128.82, 63.82], [128.47, 63.97], [128.25, 64.5], [128.43, 64.93], [128.0, 64.75], [127.75, 64.85], [127.5, 64.75], [127.25, 64.85], [127.0, 64.75], [126.47, 64.97], [126.32, 65.32], [126.25, 65.35], [126.0, 65.25], [125.47, 65.47], [125.32, 65.82], [125.25, 65.85], [125.0, 65.75], [124.75, 65.85], [124.5, 65.75], [124.25, 65.85], [124.0, 65.75], [123.47, 65.97], [123.25, 66.5], [123.35, 66.75], [123.25, 67.0]], [[129.35, 65.25], [129.25, 65.5], [129.47, 66.03], [130.0, 66.25], [129.75, 66.35], [129.5, 66.25], [129.25, 66.35], [129.0, 66.25], [128.7, 66.38], [128.65, 66.25], [128.75, 66.0], [128.65, 65.75], [128.75, 65.5], [128.57, 65.07], [129.0, 65.25], [129.3, 65.13], [129.35, 65.25]], [[130.25, 66.15], [130.32, 66.18], [130.43, 66.43], [130.0, 66.25], [130.25, 66.15]]]]}, "2024-01-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[123.25, 67.0], [123.47, 67.53], [124.0, 67.75], [124.25, 67.65], [124.5, 67.75], [124.75, 67.65], [125.0, 67.75], [125.25, 67.65], [125.5, 67.75], [125.75, 67.65], [126.0, 67.75], [126.25, 67.65], [126.32, 67.68], [126.35, 67.75], [126.25, 68.0], [126.47, 68.53], [127.0, 68.75], [127.25, 68.65], [127.5, 68.75], [128.0, 68.54], [128.32, 68.68], [128.35, 68.75], [128.25, 69.0], [128.35, 69.25], [128.25, 69.5], [128.35, 69.75], [128.25, 70.0], [128.47, 70.53], [129.0, 70.75], [129.25, 70.65], [129.5, 70.75], [129.75, 70.65], [130.0, 70.75], [130.25, 70.65], [130.5, 70.75], [131.03, 70.53], [131.18, 70.18], [131.53, 70.03], [131.75, 69.5], [131.53, 68.97], [131.18, 68.82], [131.03, 68.47], [130.68, 68.32], [130.65, 68.25], [130.68, 68.18], [131.03, 68.03], [131.25, 67.5], [131.13, 67.2], [131.25, 67.15], [131.32, 67.18], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.32, 67.68], [132.47, 68.03], [133.0, 68.25], [133.25, 68.15], [133.5, 68.25], [133.75, 68.15], [134.0, 68.25], [134.53, 68.03], [134.75, 67.5], [134.53, 66.97], [134.0, 66.75], [133.75, 66.85], [133.5, 66.75], [133.25, 66.85], [133.18, 66.82], [133.03, 66.47], [132.68, 66.32], [132.53, 65.97], [132.0, 65.75], [131.75, 65.85], [131.68, 65.82], [131.53, 65.47], [131.18, 65.32], [131.04, 65.0], [131.25, 64.5], [131.15, 64.25], [131.25, 64.0], [131.03, 63.47], [130.5, 63.25], [130.25, 63.35], [130.0, 63.25], [129.75, 63.35], [129.5, 63.25], [129.25, 63.35], [129.0, 63.25], [128.75, 63.35], [128.5, 63.25], [127.97, 63.47], [127.82, 63.82], [127.75, 63.85], [127.5, 63.75], [127.25, 63.85], [127.0, 63.75], [126.47, 63.97], [126.32, 64.32], [125.97, 64.47], [125.82, 64.82], [125.47, 64.97], [125.32, 65.32], [124.97, 65.47], [124.82, 65.82], [124.75, 65.85], [124.5, 65.75], [124.25, 65.85], [124.0, 65.75], [123.47, 65.97], [123.25, 66.5], [123.35, 66.75], [123.25, 67.0]], [[128.75, 65.15], [129.0, 65.25], [129.3, 65.13], [129.35, 65.25], [129.25, 65.5], [129.47, 66.03], [129.88, 66.2], [129.82, 66.32], [129.75, 66.35], [129.5, 66.25], [129.25, 66.35], [129.0, 66.25], [128.7, 66.38], [128.65, 66.25], [128.75, 66.0], [128.65, 65.75], [128.75, 65.5], [128.65, 65.25], [128.68, 65.18], [128.75, 65.15]]]]}, "2024-01-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.25, 67.0], [124.47, 67.53], [125.0, 67.75], [125.25, 67.65], [125.5, 67.75], [125.75, 67.65], [126.0, 67.75], [126.25, 67.65], [126.32, 67.68], [126.35, 67.75], [126.25, 68.0], [126.47, 68.53], [127.0, 68.75], [127.25, 68.65], [127.5, 68.75], [128.0, 68.54], [128.32, 68.68], [128.35, 68.75], [128.25, 69.0], [128.35, 69.25], [128.25, 69.5], [128.35, 69.75], [128.25, 70.0], [128.47, 70.53], [129.0, 70.75], [129.25, 70.65], [129.5, 70.75], [129.75, 70.65], [130.0, 70.75], [130.25, 70.65], [130.5, 70.75], [131.03, 70.53], [131.18, 70.18], [131.53, 70.03], [131.75, 69.5], [131.53, 68.97], [131.18, 68.82], [131.03, 68.47], [130.68, 68.32], [130.65, 68.25], [130.68, 68.18], [131.03, 68.03], [131.25, 67.5], [131.13, 67.2], [131.25, 67.15], [131.32, 67.18], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.32, 67.68], [132.47, 68.03], [133.0, 68.25], [133.25, 68.15], [133.5, 68.25], [133.75, 68.15], [134.0, 68.25], [134.53, 68.03], [134.75, 67.5], [134.53, 66.97], [134.0, 66.75], [133.75, 66.85], [133.5, 66.75], [133.25, 66.85], [133.18, 66.82], [133.03, 66.47], [132.68, 66.32], [132.53, 65.97], [132.0, 65.75], [131.75, 65.85], [131.68, 65.82], [131.53, 65.47], [131.0, 65.25], [130.47, 65.47], [130.32, 65.82], [129.97, 65.97], [129.82, 66.32], [129.75, 66.35], [129.5, 66.25], [129.25, 66.35], [129.0, 66.25], [128.7, 66.38], [128.65, 66.25], [128.75, 66.0], [128.65, 65.75], [128.75, 65.5], [128.65, 65.25], [128.68, 65.18], [128.75, 65.15], [129.0, 65.25], [129.5, 65.04], [130.0, 65.25], [130.25, 65.15], [130.5, 65.25], [131.03, 65.03], [131.25, 64.5], [131.15, 64.25], [131.25, 64.0], [131.03, 63.47], [130.5, 63.25], [130.25, 63.35], [130.0, 63.25], [129.75, 63.35], [129.5, 63.25], [129.25, 63.35], [129.0, 63.25], [128.75, 63.35], [128.5, 63.25], [127.97, 63.47], [127.82, 63.82], [127.75, 63.85], [127.5, 63.75], [127.25, 63.85], [127.0, 63.75], [126.47, 63.97], [126.32, 64.32], [125.97, 64.47], [125.82, 64.82], [125.47, 64.97], [125.32, 65.32], [124.97, 65.47], [124.82, 65.82], [124.47, 65.97], [124.25, 66.5], [124.35, 66.75], [124.25, 67.0]]]]}, "2024-01-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[124.97, 67.53], [125.5, 67.75], [125.75, 67.65], [126.0, 67.75], [126.25, 67.65], [126.38, 67.7], [126.25, 68.0], [126.47, 68.53], [127.0, 68.75], [127.25, 68.65], [127.5, 68.75], [128.03, 68.53], [128.25, 68.0], [128.04, 67.5], [128.25, 67.0], [128.04, 66.5], [128.18, 66.18], [128.53, 66.03], [128.75, 65.5], [128.65, 65.25], [128.68, 65.18], [129.03, 65.03], [129.18, 64.68], [129.25, 64.65], [129.5, 64.75], [129.75, 64.65], [130.0, 64.75], [130.53, 64.53], [130.75, 64.0], [130.53, 63.47], [130.0, 63.25], [129.75, 63.35], [129.5, 63.25], [129.25, 63.35], [129.0, 63.25], [128.75, 63.35], [128.5, 63.25], [127.97, 63.47], [127.82, 63.82], [127.75, 63.85], [127.5, 63.75], [127.25, 63.85], [127.0, 63.75], [126.47, 63.97], [126.32, 64.32], [125.97, 64.47], [125.82, 64.82], [125.47, 64.97], [125.32, 65.32], [124.97, 65.47], [124.75, 66.0], [124.96, 66.5], [124.75, 67.0], [124.97, 67.53]]], [[[128.85, 68.75], [128.75, 69.0], [128.85, 69.25], [128.75, 69.5], [128.85, 69.75], [128.75, 70.0], [128.97, 70.53], [129.5, 70.75], [129.75, 70.65], [130.0, 70.75], [130.25, 70.65], [130.5, 70.75], [131.03, 70.53], [131.18, 70.18], [131.53, 70.03], [131.75, 69.5], [131.53, 68.97], [131.18, 68.82], [131.03, 68.47], [130.68, 68.32], [130.65, 68.25], [130.75, 68.0], [130.54, 67.5], [130.68, 67.18], [130.75, 67.15], [131.0, 67.25], [131.25, 67.15], [131.32, 67.18], [131.47, 67.53], [132.0, 67.75], [132.25, 67.65], [132.32, 67.68], [132.47, 68.03], [133.0, 68.25], [133.25, 68.15], [133.5, 68.25], [133.75, 68.15], [134.0, 68.25], [134.53, 68.03], [134.75, 67.5], [134.53, 66.97], [134.0, 66.75], [133.75, 66.85], [133.5, 66.75], [133.25, 66.85], [133.18, 66.82], [133.03, 66.47], [132.68, 66.32], [132.53, 65.97], [132.0, 65.75], [131.75, 65.85], [131.68, 65.82], [131.53, 65.47], [131.0, 65.25], [130.47, 65.47], [130.32, 65.82], [129.97, 65.97], [129.82, 66.32], [129.47, 66.47], [129.25, 67.0], [129.38, 67.3], [128.97, 67.47], [128.75, 68.0], [128.85, 68.25], [128.75, 68.5], [128.85, 68.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -15.100231561062884}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -9.027031775550558}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-45.66611417140234, -43.761391264087024, -45.28764764678175, -45.01859844061238, -45.120565910634184]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-49.317802370220505, -53.571294681938554, -52.87401420632031, -53.75385760856719, -52.52896959657187]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-8.855762025630863, -8.483499097784128, -9.410080745324214, -9.22232048687576, -8.779062802843969]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.031700891769162, -12.042192817028507, -14.222054294121023, -15.100231561062884, -13.79352603285352]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3716498348212116, -1.5586855609416355, -1.666229176062403, -1.6539857243305274, -1.5481987486967987]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7536760804904394, -2.207229408458513, -2.403026156181595, -2.267832961585918, -2.0846528086796274]}}