{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:44:05.819603", "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": "2010-Feb-13_to_2010-Feb-17_143.0_50.0"}, "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": 2010020000445}, "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": "February 13 2010"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 17 2010"}, "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": 91945.6287926352}, "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-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": ["Japan Sea", "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": 50.0}, "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": 143.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "143.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 138.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 143.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2010-02-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, 52.53], [138.5, 52.75], [139.0, 52.54], [139.32, 52.68], [139.47, 53.03], [140.0, 53.25], [140.53, 53.03], [140.75, 52.5], [140.63, 52.2], [141.03, 52.03], [141.25, 51.5], [141.15, 51.25], [141.25, 51.0], [141.15, 50.75], [141.25, 50.5], [141.15, 50.25], [141.25, 50.0], [141.03, 49.47], [140.68, 49.32], [140.53, 48.97], [140.0, 48.75], [139.47, 48.97], [139.25, 49.5], [139.35, 49.75], [139.32, 49.82], [138.97, 49.97], [138.82, 50.32], [138.47, 50.47], [138.25, 51.0], [138.38, 51.3], [137.97, 51.47], [137.75, 52.0], [137.97, 52.53]], [[139.85, 51.25], [139.8, 51.38], [139.63, 51.3], [139.68, 51.18], [139.75, 51.15], [139.82, 51.18], [139.85, 51.25]]], [[[141.47, 53.03], [141.82, 53.18], [141.85, 53.25], [141.75, 53.5], [141.85, 53.75], [141.75, 54.0], [141.97, 54.53], [142.5, 54.75], [143.03, 54.53], [143.18, 54.18], [143.53, 54.03], [143.75, 53.5], [143.65, 53.25], [143.75, 53.0], [143.65, 52.75], [143.75, 52.5], [143.65, 52.25], [143.75, 52.0], [143.65, 51.75], [143.68, 51.68], [144.03, 51.53], [144.25, 51.0], [144.15, 50.75], [144.25, 50.5], [144.15, 50.25], [144.25, 50.0], [144.03, 49.47], [143.5, 49.25], [143.25, 49.35], [143.0, 49.25], [142.47, 49.47], [142.25, 50.0], [142.38, 50.3], [141.97, 50.47], [141.75, 51.0], [141.85, 51.25], [141.75, 51.5], [141.85, 51.75], [141.82, 51.82], [141.47, 51.97], [141.25, 52.5], [141.47, 53.03]]]]}, "2010-02-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.85, 51.75], [137.75, 52.0], [137.97, 52.53], [138.5, 52.75], [138.75, 52.65], [138.88, 52.7], [138.75, 53.0], [138.97, 53.53], [139.32, 53.68], [139.47, 54.03], [140.0, 54.25], [140.53, 54.03], [140.75, 53.5], [140.65, 53.25], [140.68, 53.18], [141.0, 53.04], [141.32, 53.18], [141.47, 53.53], [141.82, 53.68], [141.85, 53.75], [141.75, 54.0], [141.97, 54.53], [142.5, 54.75], [143.03, 54.53], [143.18, 54.18], [143.53, 54.03], [143.75, 53.5], [143.65, 53.25], [143.75, 53.0], [143.65, 52.75], [143.75, 52.5], [143.65, 52.25], [143.75, 52.0], [143.65, 51.75], [143.68, 51.68], [144.03, 51.53], [144.25, 51.0], [144.15, 50.75], [144.25, 50.5], [144.15, 50.25], [144.25, 50.0], [144.03, 49.47], [143.5, 49.25], [143.25, 49.35], [143.0, 49.25], [142.47, 49.47], [142.25, 50.0], [142.38, 50.3], [141.97, 50.47], [141.75, 51.0], [141.85, 51.25], [141.82, 51.32], [141.5, 51.46], [141.18, 51.32], [141.15, 51.25], [141.25, 51.0], [141.15, 50.75], [141.25, 50.5], [141.15, 50.25], [141.25, 50.0], [141.03, 49.47], [140.68, 49.32], [140.53, 48.97], [140.0, 48.75], [139.47, 48.97], [139.25, 49.5], [139.35, 49.75], [139.32, 49.82], [138.97, 49.97], [138.82, 50.32], [138.75, 50.35], [138.5, 50.25], [137.97, 50.47], [137.75, 51.0], [137.85, 51.25], [137.75, 51.5], [137.85, 51.75]]]]}, "2010-02-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.85, 51.75], [137.75, 52.0], [137.97, 52.53], [138.5, 52.75], [138.75, 52.65], [138.88, 52.7], [138.75, 53.0], [138.97, 53.53], [139.32, 53.68], [139.47, 54.03], [140.0, 54.25], [140.53, 54.03], [140.75, 53.5], [140.65, 53.25], [140.68, 53.18], [141.0, 53.04], [141.32, 53.18], [141.47, 53.53], [141.82, 53.68], [141.85, 53.75], [141.75, 54.0], [141.97, 54.53], [142.5, 54.75], [143.03, 54.53], [143.18, 54.18], [143.53, 54.03], [143.75, 53.5], [143.65, 53.25], [143.75, 53.0], [143.65, 52.75], [143.75, 52.5], [143.65, 52.25], [143.75, 52.0], [143.65, 51.75], [143.68, 51.68], [144.03, 51.53], [144.25, 51.0], [144.15, 50.75], [144.25, 50.5], [144.15, 50.25], [144.25, 50.0], [144.03, 49.47], [143.5, 49.25], [143.25, 49.35], [143.0, 49.25], [142.47, 49.47], [142.25, 50.0], [142.38, 50.3], [141.97, 50.47], [141.75, 51.0], [141.85, 51.25], [141.82, 51.32], [141.5, 51.46], [141.18, 51.32], [141.15, 51.25], [141.18, 51.18], [141.53, 51.03], [141.75, 50.5], [141.53, 49.97], [141.18, 49.82], [141.03, 49.47], [140.68, 49.32], [140.53, 48.97], [140.0, 48.75], [139.47, 48.97], [139.25, 49.5], [139.35, 49.75], [139.32, 49.82], [138.97, 49.97], [138.82, 50.32], [138.75, 50.35], [138.5, 50.25], [137.97, 50.47], [137.75, 51.0], [137.85, 51.25], [137.75, 51.5], [137.85, 51.75]]]]}, "2010-02-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[137.97, 52.03], [138.32, 52.18], [138.47, 52.53], [138.88, 52.7], [138.75, 53.0], [138.97, 53.53], [139.32, 53.68], [139.47, 54.03], [140.0, 54.25], [140.53, 54.03], [140.75, 53.5], [140.65, 53.25], [140.68, 53.18], [141.0, 53.04], [141.32, 53.18], [141.47, 53.53], [142.0, 53.75], [142.25, 53.65], [142.5, 53.75], [142.75, 53.65], [143.0, 53.75], [143.53, 53.53], [143.75, 53.0], [143.65, 52.75], [143.75, 52.5], [143.65, 52.25], [143.75, 52.0], [143.65, 51.75], [143.68, 51.68], [144.03, 51.53], [144.25, 51.0], [144.15, 50.75], [144.25, 50.5], [144.15, 50.25], [144.25, 50.0], [144.03, 49.47], [143.5, 49.25], [143.25, 49.35], [143.0, 49.25], [142.47, 49.47], [142.25, 50.0], [142.38, 50.3], [141.97, 50.47], [141.75, 51.0], [141.85, 51.25], [141.82, 51.32], [141.5, 51.46], [141.18, 51.32], [141.15, 51.25], [141.18, 51.18], [141.53, 51.03], [141.75, 50.5], [141.53, 49.97], [141.18, 49.82], [141.03, 49.47], [140.68, 49.32], [140.53, 48.97], [140.0, 48.75], [139.47, 48.97], [139.25, 49.5], [139.35, 49.75], [139.32, 49.82], [138.97, 49.97], [138.82, 50.32], [138.75, 50.35], [138.5, 50.25], [137.97, 50.47], [137.75, 51.0], [137.85, 51.25], [137.75, 51.5], [137.97, 52.03]]]]}, "2010-02-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[142.25, 50.0], [142.47, 50.53], [143.0, 50.75], [143.25, 50.65], [143.5, 50.75], [144.03, 50.53], [144.25, 50.0], [144.03, 49.47], [143.5, 49.25], [143.25, 49.35], [143.0, 49.25], [142.47, 49.47], [142.25, 50.0]]], [[[140.0, 51.75], [140.53, 51.53], [140.68, 51.18], [140.75, 51.15], [141.0, 51.25], [141.53, 51.03], [141.75, 50.5], [141.53, 49.97], [141.18, 49.82], [141.03, 49.47], [140.5, 49.25], [139.97, 49.47], [139.75, 50.0], [139.85, 50.25], [139.82, 50.32], [139.47, 50.47], [139.25, 51.0], [139.47, 51.53], [140.0, 51.75]]], [[[143.53, 53.53], [143.75, 53.0], [143.65, 52.75], [143.75, 52.5], [143.53, 51.97], [143.0, 51.75], [142.47, 51.97], [142.25, 52.5], [142.35, 52.75], [142.25, 53.0], [142.47, 53.53], [143.0, 53.75], [143.53, 53.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -10.511473146210932}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -7.745107965321313}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-25.480116094372903, -26.057058187884792, -26.590557635203112, -25.594720886028142, -23.430175798031996]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-28.789979081773282, -29.405974504002785, -29.09317953734248, -28.440752783143665, -26.045948909701877]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.459030633908788, -7.713456010724553, -8.37739726227913, -7.491705664861244, -6.603830062157716]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.869076824838658, -9.732125150449605, -9.95816228470079, -10.511473146210932, -7.851708093311316]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3447071170989247, -1.42456891955232, -1.5849294220871781, -1.4871871012616347, -1.323531737328207]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5146193627180808, -1.6225743514317952, -1.8638149922102787, -1.8087297580941177, -1.40336545861016]}}