{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:08.442400", "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": "2023-Nov-24_to_2023-Nov-26_142.0_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": 2023110000542}, "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": "November 24 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 26 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 67835.98258233875}, "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": ["Sea of Japan"]}, "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": 142.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "142.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 137.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 142.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[137.8, 47.63], [137.97, 48.03], [138.5, 48.25], [138.75, 48.15], [138.82, 48.18], [138.97, 48.53], [139.32, 48.68], 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["Russian-Far-East"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.97, 47.53], [137.5, 47.75], [137.8, 47.63], [137.97, 48.03], [138.5, 48.25], [138.75, 48.15], [138.82, 48.18], [138.97, 48.53], [139.32, 48.68], [139.47, 49.03], [139.82, 49.18], [139.97, 49.53], [140.32, 49.68], [140.35, 49.75], [140.25, 50.0], [140.35, 50.25], [140.25, 50.5], [140.47, 51.03], [141.0, 51.25], [141.25, 51.15], [141.5, 51.25], [141.75, 51.15], [142.0, 51.25], [142.53, 51.03], [142.75, 50.5], [142.65, 50.25], [142.75, 50.0], [142.65, 49.75], [142.75, 49.5], [142.54, 49.0], [142.75, 48.5], [142.53, 47.97], [142.0, 47.75], [141.75, 47.85], [141.5, 47.75], [141.25, 47.85], [141.18, 47.82], [141.03, 47.47], [140.68, 47.32], [140.65, 47.25], [140.75, 47.0], [140.53, 46.47], [140.0, 46.25], [139.75, 46.35], [139.68, 46.32], [139.53, 45.97], [139.0, 45.75], [138.75, 45.85], [138.5, 45.75], [138.25, 45.85], [138.0, 45.75], [137.75, 45.85], [137.5, 45.75], [137.25, 45.85], [137.0, 45.75], [136.47, 45.97], [136.25, 46.5], [136.47, 47.03], [136.82, 47.18], [136.97, 47.53]]]]}, "2023-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.97, 47.53], [137.5, 47.75], [137.8, 47.63], [137.97, 48.03], [138.5, 48.25], [138.75, 48.15], [138.82, 48.18], [138.97, 48.53], [139.32, 48.68], [139.47, 49.03], [139.82, 49.18], [139.97, 49.53], [140.32, 49.68], [140.35, 49.75], [140.25, 50.0], [140.35, 50.25], [140.25, 50.5], [140.47, 51.03], [141.0, 51.25], [141.25, 51.15], [141.5, 51.25], [141.75, 51.15], [142.0, 51.25], [142.53, 51.03], [142.75, 50.5], [142.65, 50.25], [142.75, 50.0], [142.65, 49.75], [142.75, 49.5], [142.54, 49.0], [142.75, 48.5], [142.53, 47.97], [142.0, 47.75], [141.75, 47.85], [141.5, 47.75], [141.25, 47.85], [141.18, 47.82], [141.03, 47.47], [140.68, 47.32], [140.65, 47.25], [140.75, 47.0], 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-21.6291606017717, -21.604879697098994]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.859820818270858, -7.806782520477481, -5.58247296839153]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.888401581756909, -8.88664930826593, -6.849698920139588]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6816593395801123, -1.9906827517084018, -1.414669661846208]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8851206342133715, -2.3743554974339713, -1.5378914752491288]}}