{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:00:55.060562", "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-Sep-11_to_2024-Sep-27_145.5_55.5"}, "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": 2024090000278}, "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": "September 11 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 27 2024"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 17}, "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": 70492.6370490285}, "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": ["Deryugin Basin", "Sea of Okhotsk"]}, "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": 55.5}, "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": 145.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "145.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 143.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 147.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[144.5, 56.25], [144.75, 56.15], [144.82, 56.18], [144.97, 56.53], [145.5, 56.75], [146.03, 56.53], [146.18, 56.18], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.25, 55.65], [147.5, 55.75], [148.03, 55.53], [148.25, 55.0], [148.03, 54.47], [147.5, 54.25], [147.25, 54.35], [147.18, 54.32], [147.04, 54.0], [147.25, 53.5], [147.15, 53.25], [147.25, 53.0], [147.03, 52.47], [146.68, 52.32], [146.65, 52.25], [146.75, 52.0], [146.65, 51.75], [146.75, 51.5], [146.53, 50.97], [146.0, 50.75], [145.75, 50.85], [145.5, 50.75], [144.97, 50.97], [144.75, 51.5], [144.85, 51.75], [144.75, 52.0], [144.85, 52.25], [144.75, 52.5], [144.85, 52.75], [144.82, 52.82], [144.47, 52.97], [144.32, 53.32], [143.97, 53.47], [143.82, 53.82], [143.47, 53.97], [143.32, 54.32], [142.97, 54.47], [142.75, 55.0], [142.96, 55.5], [142.75, 56.0], [142.97, 56.53], [143.5, 56.75], [144.03, 56.53], [144.18, 56.18], [144.25, 56.15], [144.5, 56.25]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.0, 54.75], [144.47, 54.97], [144.25, 55.5], [144.47, 56.03], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.25, 55.5], [147.03, 54.97], [146.5, 54.75], [146.25, 54.85], [146.0, 54.75], [145.75, 54.85], [145.5, 54.75], [145.25, 54.85], [145.0, 54.75]]]]}, "2024-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.97, 54.97], [143.75, 55.5], [143.97, 56.03], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.53, 55.53], [147.75, 55.0], [147.53, 54.47], [147.0, 54.25], [146.75, 54.35], [146.5, 54.25], [146.25, 54.35], [146.0, 54.25], [145.5, 54.46], [145.0, 54.25], [144.47, 54.47], [144.32, 54.82], [143.97, 54.97]]]]}, "2024-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.97, 54.97], [143.75, 55.5], [143.97, 56.03], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.53, 55.53], [147.75, 55.0], [147.53, 54.47], [147.0, 54.25], [146.75, 54.35], [146.5, 54.25], [146.25, 54.35], [146.0, 54.25], [145.5, 54.46], [145.0, 54.25], [144.47, 54.47], [144.32, 54.82], [143.97, 54.97]]]]}, "2024-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.75, 55.5], [143.97, 56.03], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.53, 55.53], [147.75, 55.0], [147.53, 54.47], [147.0, 54.25], [146.75, 54.35], [146.5, 54.25], [146.25, 54.35], [146.0, 54.25], [145.5, 54.46], [145.0, 54.25], [144.75, 54.35], [144.5, 54.25], [143.97, 54.47], [143.75, 55.0], [143.85, 55.25], [143.75, 55.5]]]]}, "2024-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.5, 54.25], [142.97, 54.47], [142.75, 55.0], [142.97, 55.53], [143.5, 55.75], [143.75, 55.65], [143.82, 55.68], [143.97, 56.03], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.53, 55.53], [147.75, 55.0], [147.53, 54.47], [147.0, 54.25], [146.75, 54.35], [146.5, 54.25], [146.25, 54.35], [146.0, 54.25], [145.5, 54.46], [145.0, 54.25], [144.75, 54.35], [144.5, 54.25], [144.25, 54.35], [144.0, 54.25], [143.75, 54.35], [143.5, 54.25]]]]}, "2024-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.75, 56.0], [142.97, 56.53], [143.5, 56.75], [144.03, 56.53], [144.18, 56.18], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.53, 55.53], [147.75, 55.0], [147.53, 54.47], [147.0, 54.25], [146.75, 54.35], [146.5, 54.25], [146.25, 54.35], [146.0, 54.25], [145.5, 54.46], [145.0, 54.25], [144.75, 54.35], [144.5, 54.25], [144.25, 54.35], [144.0, 54.25], [143.75, 54.35], [143.5, 54.25], [142.97, 54.47], [142.75, 55.0], [142.96, 55.5], [142.75, 56.0]]]]}, "2024-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.75, 56.0], [142.97, 56.53], [143.5, 56.75], [144.03, 56.53], [144.18, 56.18], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [146.03, 56.03], [146.2, 55.63], [146.5, 55.75], [147.03, 55.53], [147.25, 55.0], [147.03, 54.47], [146.5, 54.25], [145.97, 54.47], [145.8, 54.88], [145.68, 54.82], [145.53, 54.47], [145.0, 54.25], [144.75, 54.35], [144.68, 54.32], [144.53, 53.97], [144.0, 53.75], [143.47, 53.97], [143.32, 54.32], [142.97, 54.47], [142.75, 55.0], [142.96, 55.5], [142.75, 56.0]]]]}, "2024-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.97, 53.03], [145.5, 53.25], [146.03, 53.03], [146.25, 52.5], [146.15, 52.25], [146.25, 52.0], [146.03, 51.47], [145.5, 51.25], [144.97, 51.47], [144.75, 52.0], [144.85, 52.25], [144.75, 52.5], [144.97, 53.03]]], [[[142.97, 56.53], [143.5, 56.75], [144.03, 56.53], [144.18, 56.18], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [146.03, 56.03], [146.25, 55.5], [146.15, 55.25], [146.25, 55.0], [146.03, 54.47], [145.68, 54.32], [145.53, 53.97], [145.18, 53.82], [145.03, 53.47], [144.5, 53.25], [143.97, 53.47], [143.82, 53.82], [143.47, 53.97], [143.32, 54.32], [142.97, 54.47], [142.75, 55.0], [142.96, 55.5], [142.75, 56.0], [142.97, 56.53]]]]}, "2024-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.97, 54.47], [142.75, 55.0], [142.97, 55.53], [143.32, 55.68], [143.47, 56.03], [144.0, 56.25], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.25, 55.65], [147.5, 55.75], [148.03, 55.53], [148.25, 55.0], [148.03, 54.47], [147.5, 54.25], [147.25, 54.35], [147.18, 54.32], [147.04, 54.0], [147.25, 53.5], [147.15, 53.25], [147.25, 53.0], [147.03, 52.47], [146.68, 52.32], [146.65, 52.25], [146.75, 52.0], [146.65, 51.75], [146.75, 51.5], [146.53, 50.97], [146.0, 50.75], [145.75, 50.85], [145.5, 50.75], [144.97, 50.97], [144.75, 51.5], [144.85, 51.75], [144.75, 52.0], [144.85, 52.25], [144.75, 52.5], [144.85, 52.75], [144.82, 52.82], [144.47, 52.97], [144.32, 53.32], [143.97, 53.47], [143.82, 53.82], [143.47, 53.97], [143.32, 54.32], [142.97, 54.47]]]]}, "2024-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.97, 54.47], [142.75, 55.0], [142.97, 55.53], [143.32, 55.68], [143.47, 56.03], [144.0, 56.25], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.25, 55.65], [147.5, 55.75], [148.03, 55.53], [148.25, 55.0], [148.03, 54.47], [147.5, 54.25], [147.25, 54.35], [147.18, 54.32], [147.04, 54.0], [147.25, 53.5], [147.15, 53.25], [147.25, 53.0], [147.03, 52.47], [146.68, 52.32], [146.65, 52.25], [146.75, 52.0], [146.65, 51.75], [146.75, 51.5], [146.53, 50.97], [146.0, 50.75], [145.75, 50.85], [145.5, 50.75], [144.97, 50.97], [144.75, 51.5], [144.85, 51.75], [144.75, 52.0], [144.85, 52.25], [144.75, 52.5], [144.85, 52.75], [144.82, 52.82], [144.47, 52.97], [144.32, 53.32], [143.97, 53.47], [143.82, 53.82], [143.47, 53.97], [143.32, 54.32], [142.97, 54.47]]]]}, "2024-09-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.97, 54.47], [142.75, 55.0], [142.97, 55.53], [143.32, 55.68], [143.47, 56.03], [144.0, 56.25], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [144.82, 56.18], [144.97, 56.53], [145.5, 56.75], [146.03, 56.53], [146.18, 56.18], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.18, 55.68], [147.25, 55.65], [147.5, 55.75], [148.03, 55.53], [148.25, 55.0], [148.03, 54.47], [147.5, 54.25], [147.25, 54.35], [147.18, 54.32], [147.04, 54.0], [147.25, 53.5], [147.15, 53.25], [147.25, 53.0], [147.03, 52.47], [146.68, 52.32], [146.65, 52.25], [146.75, 52.0], [146.65, 51.75], [146.75, 51.5], [146.53, 50.97], [146.0, 50.75], [145.75, 50.85], [145.5, 50.75], [144.97, 50.97], [144.75, 51.5], [144.85, 51.75], [144.75, 52.0], [144.85, 52.25], [144.75, 52.5], [144.85, 52.75], [144.82, 52.82], [144.47, 52.97], [144.32, 53.32], [143.97, 53.47], [143.82, 53.82], [143.47, 53.97], [143.32, 54.32], [142.97, 54.47]]]]}, "2024-09-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.0, 54.75], [143.47, 54.97], [143.25, 55.5], [143.47, 56.03], [144.0, 56.25], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [144.82, 56.18], [144.97, 56.53], [145.5, 56.75], [146.03, 56.53], [146.18, 56.18], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.2, 55.63], [147.5, 55.75], [148.03, 55.53], [148.25, 55.0], [148.03, 54.47], [147.5, 54.25], [146.97, 54.47], [146.8, 54.88], [146.5, 54.75], [146.25, 54.85], [146.0, 54.75], [145.75, 54.85], [145.5, 54.75], [145.25, 54.85], [145.0, 54.75], [144.75, 54.85], [144.5, 54.75], [144.25, 54.85], [144.0, 54.75]]]]}, "2024-09-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.47, 56.03], [144.0, 56.25], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [144.82, 56.18], [144.97, 56.53], [145.5, 56.75], [146.03, 56.53], [146.18, 56.18], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.25, 55.5], [147.03, 54.97], [146.5, 54.75], [146.25, 54.85], [146.0, 54.75], [145.75, 54.85], [145.5, 54.75], [145.25, 54.85], [145.0, 54.75], [144.75, 54.85], [144.68, 54.82], [144.53, 54.47], [144.0, 54.25], [143.75, 54.35], [143.5, 54.25], [142.97, 54.47], [142.75, 55.0], [142.97, 55.53], [143.32, 55.68], [143.47, 56.03]]]]}, "2024-09-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.47, 56.03], [144.0, 56.25], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.25, 56.15], [146.5, 56.25], [147.03, 56.03], [147.25, 55.5], [147.03, 54.97], [146.5, 54.75], [146.25, 54.85], [146.0, 54.75], [145.75, 54.85], [145.5, 54.75], [145.25, 54.85], [145.0, 54.75], [144.75, 54.85], [144.68, 54.82], [144.53, 54.47], [144.0, 54.25], [143.75, 54.35], [143.5, 54.25], [142.97, 54.47], [142.75, 55.0], [142.97, 55.53], [143.32, 55.68], [143.47, 56.03]]]]}, "2024-09-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[143.47, 56.03], [144.0, 56.25], [144.25, 56.15], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [145.75, 56.15], [146.0, 56.25], [146.53, 56.03], [146.75, 55.5], [146.53, 54.97], [146.0, 54.75], [145.75, 54.85], [145.5, 54.75], [145.25, 54.85], [145.0, 54.75], [144.75, 54.85], [144.68, 54.82], [144.53, 54.47], [144.0, 54.25], [143.75, 54.35], [143.5, 54.25], [142.97, 54.47], [142.75, 55.0], [142.97, 55.53], [143.32, 55.68], [143.47, 56.03]]]]}, "2024-09-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[144.5, 54.75], [143.97, 54.97], [143.75, 55.5], [143.97, 56.03], [144.5, 56.25], [144.75, 56.15], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [146.03, 56.03], [146.25, 55.5], [146.03, 54.97], [145.5, 54.75], [145.25, 54.85], [145.0, 54.75], [144.75, 54.85], [144.5, 54.75]]]]}, "2024-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[145.0, 54.75], [144.47, 54.97], [144.25, 55.5], [144.47, 56.03], [145.0, 56.25], [145.25, 56.15], [145.5, 56.25], [146.03, 56.03], [146.25, 55.5], [146.03, 54.97], [145.5, 54.75], [145.25, 54.85], [145.0, 54.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -4.029976984931864}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -2.5329138455241007}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [7.416333770752033, 7.627541690402609, 7.758576400191714, 7.439507293701126, 7.454666392008505, 6.949941253662132, 7.0381454930160885, 7.584737396240257, 8.041004950721117, 7.947662401628918, 7.14667563187453, 6.6798085530599, 5.918865599455671, 5.818733469645224, 5.8696776617141495, 5.637320878770652, 5.248565928141261]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.152234649658226, 6.444463348388695, 6.696193949381552, 5.985560353597009, 6.146621958414755, 5.0840558369954465, 5.543990071614587, 5.6990155537923215, 5.460157012939476, 5.7317431131999115, 5.053754425048851, 5.9632558186849, 4.5065844217936615, 4.251950836181663, 4.7509323120117415, 5.249272918701195, 4.929189300537132]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.6049823961202208, -2.6913253503321295, -2.3831772899155164, -2.59907644001276, -2.5586371556689564, -2.911770061043699, -2.717621902501192, -2.435550172993338, -2.2919006367798747, -2.2767262358959277, -2.8991137609896005, -2.053045621135688, -2.737498763901082, -2.7372513204560818, -2.4760838629471777, -2.140779842588586, -2.184621752453495]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-2.799093874361631, -3.2236089741494425, -2.7796594892726603, -3.3385558942947, -3.082458090993555, -4.029976984931864, -3.4726283088870105, -3.1149359614121863, -3.2143270607187446, -2.789650336323689, -3.332932031493101, -2.3464626003956255, -3.706088931236934, -3.7433776236493372, -3.0567498025280884, -2.3662223280132935, -2.46671682379764]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6414787855798618, -1.7362854858274954, -1.4934427217889132, -1.5971635394473351, -1.5658827478090238, -1.7902567352163097, -1.6679713426913134, -1.571587195992084, -1.5347942309474918, -1.5929328188264307, -2.0831479934274753, -1.6156916284792016, -2.0663514876345612, -2.0385280736083295, -1.7529628056185433, -1.5464263223513488, -1.563960793531431]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8302606017554848, -1.9811329886295923, -1.6662798047660425, -1.9935613594610568, -1.9018588012381068, -2.4840304647500573, -2.2139585436004627, -2.0632553447194435, -2.1644611180511935, -2.0182029837295663, -2.5982378045305543, -1.918976999373493, -2.899863239166453, -2.9039018215061763, -2.289645446556437, -1.7616960772332546, -1.780287074079241]}}