{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:14.060757", "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-May-18_to_2023-May-20_98.0_48.0"}, "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": 2023050000561}, "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 18 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 20 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": 55374.6406188516}, "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": 48.0}, "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": 98.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "98.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 97.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 100.5}, "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": 48.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[97.5, 48.75], [97.75, 48.65], [98.0, 48.75], [98.53, 48.53], [98.75, 48.0], [98.65, 47.75], [98.68, 47.68], [98.75, 47.65], [99.0, 47.75], [99.25, 47.65], [99.5, 47.75], [99.75, 47.65], [100.0, 47.75], [100.25, 47.65], [100.5, 47.75], [101.03, 47.53], [101.25, 47.0], [101.03, 46.47], [100.68, 46.32], [100.65, 46.25], [100.75, 46.0], [100.53, 45.47], [100.0, 45.25], [99.75, 45.35], [99.68, 45.32], [99.53, 44.97], [99.18, 44.82], [99.03, 44.47], [98.5, 44.25], [98.25, 44.35], [98.0, 44.25], [97.47, 44.47], [97.32, 44.82], [96.97, 44.97], [96.75, 45.5], [96.97, 46.03], [97.32, 46.18], [97.35, 46.25], [97.25, 46.5], [97.35, 46.75], [97.32, 46.82], [96.97, 46.97], [96.75, 47.5], [96.85, 47.75], [96.75, 48.0], [96.97, 48.53], [97.5, 48.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia", "E.C.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.75, 48.0], [96.97, 48.53], [97.5, 48.75], [97.75, 48.65], [98.0, 48.75], [98.53, 48.53], [98.75, 48.0], [98.65, 47.75], [98.68, 47.68], [98.75, 47.65], [99.0, 47.75], [99.25, 47.65], [99.5, 47.75], [99.75, 47.65], [100.0, 47.75], [100.25, 47.65], [100.5, 47.75], [101.03, 47.53], [101.25, 47.0], [101.03, 46.47], [100.68, 46.32], [100.65, 46.25], [100.75, 46.0], [100.53, 45.47], [100.0, 45.25], [99.75, 45.35], [99.68, 45.32], [99.53, 44.97], [99.18, 44.82], [99.03, 44.47], [98.5, 44.25], [98.25, 44.35], [98.0, 44.25], [97.47, 44.47], [97.32, 44.82], [96.97, 44.97], [96.75, 45.5], [96.97, 46.03], [97.32, 46.18], [97.35, 46.25], [97.25, 46.5], [97.35, 46.75], [97.32, 46.82], [96.97, 46.97], [96.75, 47.5], [96.85, 47.75], [96.75, 48.0]]]]}, "2023-05-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.75, 48.0], [96.97, 48.53], [97.5, 48.75], [97.75, 48.65], [98.0, 48.75], [98.53, 48.53], [98.75, 48.0], [98.65, 47.75], [98.68, 47.68], [98.75, 47.65], [99.0, 47.75], [99.25, 47.65], [99.5, 47.75], [99.75, 47.65], [100.0, 47.75], [100.25, 47.65], [100.5, 47.75], [101.03, 47.53], [101.25, 47.0], [101.03, 46.47], [100.68, 46.32], [100.65, 46.25], [100.75, 46.0], [100.53, 45.47], [100.0, 45.25], [99.75, 45.35], [99.68, 45.32], [99.53, 44.97], [99.18, 44.82], [99.03, 44.47], [98.5, 44.25], [98.25, 44.35], [98.0, 44.25], [97.47, 44.47], [97.32, 44.82], [96.97, 44.97], [96.75, 45.5], [96.97, 46.03], [97.32, 46.18], [97.35, 46.25], [97.25, 46.5], [97.35, 46.75], [97.32, 46.82], [96.97, 46.97], [96.75, 47.5], [96.85, 47.75], [96.75, 48.0]]]]}, "2023-05-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[96.75, 48.0], [96.97, 48.53], [97.5, 48.75], [97.75, 48.65], [98.0, 48.75], [98.53, 48.53], [98.75, 48.0], [98.65, 47.75], [98.68, 47.68], [98.75, 47.65], [99.0, 47.75], [99.25, 47.65], [99.5, 47.75], [99.75, 47.65], [100.0, 47.75], [100.25, 47.65], [100.5, 47.75], [101.03, 47.53], [101.25, 47.0], [101.03, 46.47], [100.68, 46.32], [100.65, 46.25], [100.75, 46.0], [100.53, 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-5.5185551639398795]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.229300877420938, -9.685271139522317, -7.046935262380343]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.356943853145822, -10.722128701153679, -8.69292833080425]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6995277654992473, -2.2247214929659527, -1.5732403293775294]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.334585321848063, -2.392245041102731, -1.8781000245434334]}}