{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:20:29.533070", "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": "2019-Sep-17_to_2019-Sep-20_136.5_46.5"}, "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": 2019090000567}, "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 17 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 20 2019"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 55917.19472380525}, "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": []}, "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": 46.5}, "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": 136.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "136.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 136.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-09-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.75, 46.5], [135.97, 47.03], [136.5, 47.25], [136.75, 47.15], [137.0, 47.25], [137.53, 47.03], [137.75, 46.5], [137.53, 45.97], [137.0, 45.75], [136.75, 45.85], [136.5, 45.75], [135.97, 45.97], [135.75, 46.5]]], [[[137.75, 49.0], [137.97, 49.53], [138.5, 49.75], [138.75, 49.65], [139.0, 49.75], [139.53, 49.53], [139.75, 49.0], [139.53, 48.47], [139.0, 48.25], [138.75, 48.35], [138.5, 48.25], [137.97, 48.47], [137.75, 49.0]]]]}, "2019-09-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.85, 47.25], [135.75, 47.5], [135.97, 48.03], [136.5, 48.25], [136.75, 48.15], [136.82, 48.18], [136.97, 48.53], [137.32, 48.68], [137.35, 48.75], [137.25, 49.0], [137.35, 49.25], [137.25, 49.5], [137.47, 50.03], [137.82, 50.18], [137.97, 50.53], [138.5, 50.75], [139.03, 50.53], [139.25, 50.0], [139.15, 49.75], [139.18, 49.68], [139.53, 49.53], [139.68, 49.18], [140.03, 49.03], [140.25, 48.5], [140.03, 47.97], [139.68, 47.82], [139.53, 47.47], [139.18, 47.32], [139.15, 47.25], [139.25, 47.0], [139.03, 46.47], [138.5, 46.25], [138.25, 46.35], [138.18, 46.32], [138.03, 45.97], [137.5, 45.75], [137.25, 45.85], [137.0, 45.75], [136.75, 45.85], [136.5, 45.75], [135.97, 45.97], [135.75, 46.5], [135.85, 46.75], [135.75, 47.0], [135.85, 47.25]]]]}, "2019-09-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.85, 47.25], [135.75, 47.5], [135.97, 48.03], [136.5, 48.25], [136.75, 48.15], [136.82, 48.18], [136.97, 48.53], [137.32, 48.68], [137.35, 48.75], [137.25, 49.0], [137.35, 49.25], [137.25, 49.5], [137.47, 50.03], [137.82, 50.18], [137.97, 50.53], [138.5, 50.75], [139.03, 50.53], [139.25, 50.0], [139.15, 49.75], [139.18, 49.68], [139.53, 49.53], [139.68, 49.18], [140.03, 49.03], [140.25, 48.5], [140.03, 47.97], [139.68, 47.82], [139.53, 47.47], [139.18, 47.32], [139.15, 47.25], [139.25, 47.0], [139.03, 46.47], [138.5, 46.25], [138.25, 46.35], [138.18, 46.32], [138.03, 45.97], [137.5, 45.75], [137.25, 45.85], [137.0, 45.75], [136.75, 45.85], [136.5, 45.75], [135.97, 45.97], [135.75, 46.5], [135.85, 46.75], [135.75, 47.0], [135.85, 47.25]]]]}, "2019-09-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.85, 47.25], [135.75, 47.5], [135.97, 48.03], [136.5, 48.25], [136.75, 48.15], [136.82, 48.18], [136.97, 48.53], [137.32, 48.68], [137.35, 48.75], [137.25, 49.0], [137.35, 49.25], [137.25, 49.5], [137.47, 50.03], [137.82, 50.18], [137.97, 50.53], [138.5, 50.75], [139.03, 50.53], [139.25, 50.0], [139.15, 49.75], [139.18, 49.68], [139.53, 49.53], [139.68, 49.18], [140.03, 49.03], [140.25, 48.5], [140.03, 47.97], [139.68, 47.82], [139.53, 47.47], [139.18, 47.32], [139.15, 47.25], [139.25, 47.0], [139.03, 46.47], [138.5, 46.25], [138.25, 46.35], [138.18, 46.32], [138.03, 45.97], [137.5, 45.75], [137.25, 45.85], [137.0, 45.75], [136.75, 45.85], [136.5, 45.75], [135.97, 45.97], [135.75, 46.5], [135.85, 46.75], [135.75, 47.0], [135.85, 47.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.685478548420406}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.212569811926471}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.1343625646678674, 3.0198037005945935, 3.1864535605734545, 3.8024712681891515]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.7852224864350887, 0.6874115771882998, 0.9322126261952803, 1.1187085633329161]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.502135028500149, -5.992526348419235, -5.304863612992651, -4.445569071912168]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.712962934387008, -7.685478548420406, -6.484661628088304, -5.365343293477281]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4691238619089275, -1.9674775497259034, -1.7816442305211948, -1.5007339359103726]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5337189133860876, -2.438534582312615, -2.0380680089234704, -1.7586623091683704]}}