{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:01.736212", "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-May-15_to_2025-May-17_109.0_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": 2025050000361}, "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": "May 15 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 17 2025"}, "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": 100739.1761399922}, "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": ["Mongolia"]}, "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": 109.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "109.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 106.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 112.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[105.47, 47.53], [106.0, 47.75], [106.25, 47.65], [106.5, 47.75], [106.75, 47.65], [107.0, 47.75], [107.25, 47.65], 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"value": ["E.Siberia", "E.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.47, 46.47], [105.25, 47.0], [105.47, 47.53], [106.0, 47.75], [106.25, 47.65], [106.5, 47.75], [106.75, 47.65], [107.0, 47.75], [107.25, 47.65], [107.5, 47.75], [107.75, 47.65], [108.0, 47.75], [108.25, 47.65], [108.5, 47.75], [108.75, 47.65], [109.0, 47.75], [109.25, 47.65], [109.5, 47.75], [109.75, 47.65], [110.0, 47.75], [110.25, 47.65], [110.5, 47.75], [111.03, 47.53], [111.18, 47.18], [111.53, 47.03], [111.68, 46.68], [111.75, 46.65], [112.0, 46.75], [112.53, 46.53], [112.75, 46.0], [112.65, 45.75], [112.75, 45.5], [112.53, 44.97], [112.0, 44.75], [111.75, 44.85], [111.5, 44.75], [111.25, 44.85], [111.18, 44.82], [111.03, 44.47], [110.5, 44.25], [110.25, 44.35], [110.0, 44.25], [109.75, 44.35], [109.5, 44.25], [109.25, 44.35], [109.0, 44.25], [108.75, 44.35], [108.5, 44.25], [107.97, 44.47], [107.82, 44.82], [107.75, 44.85], [107.5, 44.75], [107.25, 44.85], [107.0, 44.75], [106.47, 44.97], [106.25, 45.5], [106.35, 45.75], [106.32, 45.82], [105.97, 45.97], [105.82, 46.32], [105.47, 46.47]]]]}, "2025-05-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[105.47, 46.47], [105.25, 47.0], [105.47, 47.53], [106.0, 47.75], [106.25, 47.65], [106.5, 47.75], [106.75, 47.65], [107.0, 47.75], [107.25, 47.65], [107.5, 47.75], [107.75, 47.65], [108.0, 47.75], [108.25, 47.65], [108.5, 47.75], [108.75, 47.65], [109.0, 47.75], [109.25, 47.65], [109.5, 47.75], [109.75, 47.65], [110.0, 47.75], [110.25, 47.65], [110.5, 47.75], [111.03, 47.53], [111.18, 47.18], [111.53, 47.03], [111.68, 46.68], [111.75, 46.65], [112.0, 46.75], [112.53, 46.53], [112.75, 46.0], [112.65, 45.75], [112.75, 45.5], [112.53, 44.97], [112.0, 44.75], [111.75, 44.85], [111.5, 44.75], [111.25, 44.85], [111.18, 44.82], [111.03, 44.47], [110.5, 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maximum t2m.", "value": [2.9468246459961165, -0.11312840779618227, 2.8018063863118527]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.889019388127375, -9.79722504234805, -7.334228170715819]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.460830956631867, -10.832738397328853, -8.745268489002967]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.558072266652329, -2.1880766860227725, -1.627001868299036]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.903998440119142, -2.421663767445649, -1.9257194362138939]}}