{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:09:08.414458", "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-Oct-19_to_2017-Oct-25_134.5_71.0"}, "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": 2017100000567}, "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": "October 19 2017"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 25 2017"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 69800.84929463748}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic"]}, "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": ["Laptev 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": 71.0}, "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": 134.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "134.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 129.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 138.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 70.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 74.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2017-10-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.47, 69.97], [136.25, 70.5], [136.47, 71.03], [137.0, 71.25], [137.25, 71.15], [137.5, 71.25], [137.75, 71.15], [138.0, 71.25], [138.53, 71.03], [138.75, 70.5], [138.53, 69.97], [138.0, 69.75], [137.75, 69.85], [137.5, 69.75], [137.25, 69.85], [137.0, 69.75], [136.47, 69.97]]]]}, "2017-10-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.97, 71.47], [129.75, 72.0], [129.97, 72.53], [130.5, 72.75], [130.75, 72.65], [131.0, 72.75], [131.25, 72.65], [131.5, 72.75], [131.75, 72.65], [132.0, 72.75], [132.25, 72.65], [132.5, 72.75], [132.75, 72.65], [133.0, 72.75], [133.53, 72.53], [133.7, 72.13], [134.0, 72.25], [134.25, 72.15], [134.5, 72.25], [134.75, 72.15], [135.0, 72.25], [135.25, 72.15], [135.5, 72.25], [135.75, 72.15], [136.0, 72.25], [136.25, 72.15], [136.5, 72.25], [136.75, 72.15], [137.0, 72.25], [137.53, 72.03], [137.68, 71.68], [137.75, 71.65], [138.0, 71.75], [138.53, 71.53], [138.75, 71.0], [138.65, 70.75], [138.75, 70.5], [138.53, 69.97], [138.0, 69.75], [137.75, 69.85], [137.5, 69.75], [137.25, 69.85], [137.0, 69.75], [136.47, 69.97], [136.32, 70.32], [136.25, 70.35], [136.0, 70.25], [135.75, 70.35], [135.5, 70.25], [135.25, 70.35], [135.0, 70.25], [134.75, 70.35], [134.5, 70.25], [134.25, 70.35], [134.0, 70.25], [133.47, 70.47], [133.25, 71.0], [133.35, 71.25], [133.3, 71.38], [133.0, 71.25], [132.75, 71.35], [132.5, 71.25], [132.25, 71.35], [132.18, 71.32], [132.03, 70.97], [131.5, 70.75], [130.97, 70.97], [130.82, 71.32], [130.75, 71.35], [130.5, 71.25], [129.97, 71.47]]]]}, "2017-10-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[130.32, 73.18], [130.35, 73.25], [130.25, 73.5], [130.47, 74.03], [130.82, 74.18], [130.97, 74.53], [131.5, 74.75], [131.75, 74.65], [131.82, 74.68], [131.97, 75.03], [132.5, 75.25], [132.75, 75.15], [133.0, 75.25], [133.25, 75.15], [133.5, 75.25], [133.75, 75.15], [134.0, 75.25], [134.53, 75.03], [134.68, 74.68], [134.75, 74.65], [134.82, 74.68], [134.97, 75.03], [135.5, 75.25], [136.03, 75.03], [136.25, 74.5], [136.15, 74.25], [136.25, 74.0], [136.03, 73.47], [135.68, 73.32], [135.53, 72.97], [135.18, 72.82], [135.15, 72.75], [135.25, 72.5], [135.13, 72.2], [135.25, 72.15], [135.5, 72.25], [135.75, 72.15], [136.0, 72.25], [136.25, 72.15], [136.5, 72.25], [136.75, 72.15], [137.0, 72.25], [137.53, 72.03], [137.68, 71.68], [137.75, 71.65], [138.0, 71.75], [138.53, 71.53], [138.75, 71.0], [138.65, 70.75], [138.75, 70.5], [138.53, 69.97], [138.0, 69.75], [137.75, 69.85], [137.5, 69.75], [137.25, 69.85], [137.0, 69.75], [136.47, 69.97], [136.32, 70.32], [136.25, 70.35], [136.0, 70.25], [135.75, 70.35], [135.5, 70.25], [135.25, 70.35], [135.0, 70.25], [134.75, 70.35], [134.5, 70.25], [134.25, 70.35], [134.0, 70.25], [133.47, 70.47], [133.25, 71.0], [133.35, 71.25], [133.32, 71.32], [133.25, 71.35], [133.0, 71.25], [132.75, 71.35], [132.5, 71.25], [132.25, 71.35], [132.18, 71.32], [132.03, 70.97], [131.5, 70.75], [130.97, 70.97], [130.82, 71.32], [130.75, 71.35], [130.5, 71.25], [130.25, 71.35], [130.0, 71.25], [129.47, 71.47], [129.25, 72.0], [129.47, 72.53], [129.82, 72.68], [129.97, 73.03], [130.32, 73.18]]]]}, "2017-10-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[129.47, 73.03], [129.82, 73.18], [129.97, 73.53], [130.32, 73.68], [130.47, 74.03], [130.82, 74.18], [130.97, 74.53], [131.5, 74.75], [131.75, 74.65], [131.82, 74.68], [131.97, 75.03], [132.5, 75.25], [132.75, 75.15], [133.0, 75.25], [133.25, 75.15], [133.5, 75.25], [133.75, 75.15], [134.0, 75.25], [134.53, 75.03], [134.68, 74.68], [134.75, 74.65], [134.82, 74.68], [134.97, 75.03], [135.5, 75.25], [136.03, 75.03], [136.25, 74.5], [136.15, 74.25], [136.25, 74.0], [136.03, 73.47], [135.68, 73.32], [135.53, 72.97], [135.18, 72.82], [135.15, 72.75], [135.25, 72.5], [135.13, 72.2], [135.25, 72.15], [135.5, 72.25], [135.75, 72.15], [136.0, 72.25], [136.25, 72.15], [136.5, 72.25], [136.75, 72.15], [137.0, 72.25], [137.53, 72.03], [137.68, 71.68], [137.75, 71.65], [138.0, 71.75], [138.53, 71.53], [138.75, 71.0], [138.65, 70.75], [138.75, 70.5], [138.53, 69.97], [138.0, 69.75], [137.75, 69.85], [137.5, 69.75], [137.25, 69.85], [137.0, 69.75], [136.75, 69.85], [136.5, 69.75], [135.97, 69.97], [135.82, 70.32], [135.75, 70.35], [135.5, 70.25], [135.25, 70.35], [135.0, 70.25], [134.75, 70.35], [134.5, 70.25], [134.25, 70.35], [134.0, 70.25], [133.75, 70.35], [133.5, 70.25], [133.25, 70.35], [133.0, 70.25], [132.75, 70.35], [132.5, 70.25], [131.97, 70.47], [131.82, 70.82], [131.75, 70.85], [131.5, 70.75], [130.97, 70.97], [130.82, 71.32], [130.75, 71.35], [130.5, 71.25], [130.25, 71.35], [130.0, 71.25], [129.47, 71.47], [129.25, 72.0], [129.35, 72.25], [129.25, 72.5], [129.47, 73.03]]]]}, "2017-10-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.97, 69.97], [135.75, 70.5], [135.97, 71.03], [136.5, 71.25], [137.03, 71.03], [137.25, 70.5], [137.03, 69.97], [136.5, 69.75], [135.97, 69.97]]], [[[129.82, 73.18], [129.97, 73.53], [130.32, 73.68], [130.47, 74.03], [130.82, 74.18], [130.97, 74.53], [131.5, 74.75], [131.75, 74.65], [131.82, 74.68], [131.97, 75.03], [132.5, 75.25], [132.75, 75.15], [133.0, 75.25], [133.25, 75.15], [133.5, 75.25], [133.75, 75.15], [134.0, 75.25], [134.53, 75.03], [134.68, 74.68], [134.75, 74.65], [134.82, 74.68], [134.97, 75.03], [135.5, 75.25], [136.03, 75.03], [136.25, 74.5], [136.15, 74.25], [136.25, 74.0], [136.03, 73.47], [135.68, 73.32], [135.53, 72.97], [135.18, 72.82], [135.15, 72.75], [135.25, 72.5], [135.03, 71.97], [134.5, 71.75], [134.75, 71.65], [135.0, 71.75], [135.53, 71.53], [135.75, 71.0], [135.53, 70.47], [135.0, 70.25], [134.75, 70.35], [134.5, 70.25], [134.25, 70.35], [134.0, 70.25], [133.75, 70.35], [133.5, 70.25], [133.25, 70.35], [133.0, 70.25], [132.75, 70.35], [132.5, 70.25], [131.97, 70.47], [131.82, 70.82], [131.75, 70.85], [131.5, 70.75], [130.97, 70.97], [130.82, 71.32], [130.75, 71.35], [130.5, 71.25], [130.25, 71.35], [130.0, 71.25], [129.47, 71.47], [129.25, 72.0], [129.35, 72.25], [129.25, 72.5], [129.47, 73.03], [129.82, 73.18]], [[134.25, 71.85], [134.18, 71.82], [134.13, 71.7], [134.25, 71.65], [134.5, 71.75], [134.25, 71.85]]]]}, "2017-10-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.97, 69.97], [135.75, 70.5], [135.97, 71.03], [136.5, 71.25], [137.03, 71.03], [137.25, 70.5], [137.03, 69.97], [136.5, 69.75], [135.97, 69.97]]], [[[129.82, 73.18], [129.97, 73.53], [130.5, 73.75], [130.75, 73.65], [131.0, 73.75], [131.25, 73.65], [131.5, 73.75], [131.75, 73.65], [132.0, 73.75], [132.25, 73.65], [132.5, 73.75], [132.75, 73.65], [133.0, 73.75], [133.53, 73.53], [133.68, 73.18], [133.75, 73.15], [134.0, 73.25], [134.25, 73.15], [134.5, 73.25], [135.03, 73.03], [135.25, 72.5], [135.03, 71.97], [134.5, 71.75], [134.75, 71.65], [135.0, 71.75], [135.53, 71.53], [135.75, 71.0], [135.53, 70.47], [135.0, 70.25], [134.75, 70.35], [134.5, 70.25], [134.25, 70.35], [134.0, 70.25], [133.75, 70.35], [133.5, 70.25], [133.25, 70.35], [133.0, 70.25], [132.75, 70.35], [132.5, 70.25], [131.97, 70.47], [131.82, 70.82], [131.75, 70.85], [131.5, 70.75], [130.97, 70.97], [130.82, 71.32], [130.75, 71.35], [130.5, 71.25], [130.25, 71.35], [130.0, 71.25], [129.47, 71.47], [129.25, 72.0], [129.35, 72.25], [129.25, 72.5], [129.47, 73.03], [129.82, 73.18]], [[134.25, 71.85], [134.18, 71.82], [134.13, 71.7], [134.25, 71.65], [134.5, 71.75], [134.25, 71.85]]]]}, "2017-10-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[134.5, 73.25], [135.03, 73.03], [135.25, 72.5], [135.03, 71.97], [134.5, 71.75], [134.2, 71.88], [134.03, 71.47], [133.5, 71.25], [132.97, 71.47], [132.75, 72.0], [132.97, 72.53], [133.5, 72.75], [133.8, 72.63], [133.97, 73.03], [134.5, 73.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.739405489387508}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.509972976283325}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-22.831610133574458, -20.518748839980958, -18.72213611050367, -19.588131243268123, -18.565242975533607, -19.921222558011692, -18.69496675455946]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-23.152437005976253, -25.02475540507251, -26.20607476183332, -25.50292193738494, -25.410214018012454, -26.077046819169936, -19.12875784985522]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.13832793529834, -7.9403299198518, -7.735572651635927, -7.763865715089065, -6.986802213387354, -7.0040395733980425, -6.062872257205456]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-9.38505605305113, -10.789499259616008, -11.739405489387508, -9.972689083064154, -9.589905477990243, -9.73082403435302, -6.2255416414568]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.554325413370613, -1.5244651890427012, -1.6809870426596782, -1.6694510660969524, -1.5719264204912726, -1.5314981520194841, -1.390358064422966]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5774854805427851, -1.8062050342459062, -2.1415345113237203, -1.90282820364505, -1.8897470397376053, -1.6688029264985536, -1.4327848319030114]}}