{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:06:16.413133", "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": "2025-Jul-04_to_2025-Jul-08_139.0_58.0"}, "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": 2025070000290}, "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": "July 04 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "July 08 2025"}, "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": 80715.18307552734}, "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": []}, "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": 58.0}, "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": 139.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "139.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 133.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 139.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[132.47, 58.53], [133.0, 58.75], [133.25, 58.65], [133.32, 58.68], [133.47, 59.03], [134.0, 59.25], [134.25, 59.15], 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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": {"2025-07-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[138.25, 58.5], [138.47, 59.03], [139.0, 59.25], [139.53, 59.03], [139.68, 58.68], [140.03, 58.53], [140.25, 58.0], [140.03, 57.47], [139.5, 57.25], [139.25, 57.35], [139.0, 57.25], [138.47, 57.47], [138.25, 58.0], [138.35, 58.25], [138.25, 58.5]]]]}, "2025-07-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[136.97, 57.97], [136.75, 58.5], [136.97, 59.03], [137.32, 59.18], [137.47, 59.53], [138.0, 59.75], [138.25, 59.65], [138.5, 59.75], [139.03, 59.53], [139.18, 59.18], [139.53, 59.03], [139.68, 58.68], [140.03, 58.53], [140.25, 58.0], [140.03, 57.47], [139.5, 57.25], [139.25, 57.35], [139.0, 57.25], [138.75, 57.35], [138.5, 57.25], [138.25, 57.35], [138.0, 57.25], [137.47, 57.47], [137.32, 57.82], [136.97, 57.97]]]]}, "2025-07-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[132.25, 57.5], [132.35, 57.75], [132.25, 58.0], [132.47, 58.53], [133.0, 58.75], [133.25, 58.65], [133.32, 58.68], [133.47, 59.03], [134.0, 59.25], [134.25, 59.15], [134.5, 59.25], [134.75, 59.15], [135.0, 59.25], [135.25, 59.15], [135.5, 59.25], [135.75, 59.15], [136.0, 59.25], [136.25, 59.15], [136.5, 59.25], [136.75, 59.15], [137.0, 59.25], [137.25, 59.15], [137.32, 59.18], [137.47, 59.53], [138.0, 59.75], [138.25, 59.65], [138.5, 59.75], [139.03, 59.53], [139.18, 59.18], [139.53, 59.03], [139.68, 58.68], [140.03, 58.53], [140.25, 58.0], [140.03, 57.47], [139.5, 57.25], [139.25, 57.35], [139.18, 57.32], [139.03, 56.97], [138.5, 56.75], [138.25, 56.85], [138.0, 56.75], [137.75, 56.85], [137.5, 56.75], [137.25, 56.85], [137.0, 56.75], [136.75, 56.85], [136.68, 56.82], [136.53, 56.47], [136.0, 56.25], [135.75, 56.35], [135.5, 56.25], [135.25, 56.35], 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8.696320249596454, 10.854550933837857]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [7.705555216471396, 7.5525616963704465, 6.3469164530436615, 6.060842132568382, 7.834429677327478]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.887643580079157, -4.928156814098509, -5.462022196197191, -7.145699367064159, -5.217970515587184]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.999276921528065, -5.198649559157502, -6.476301298159683, -8.262186241794439, -6.09927613301187]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.2666324980908776, -1.3370081165821428, -1.5592616495896832, -2.085728258318325, -1.5430577591456858]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.2923409419934393, -1.4346279772198185, -1.8594512667712806, -2.4769100130056048, -1.8814186826965922]}}