{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:17.828046", "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-Jan-12_to_2023-Jan-14_96.5_48.5"}, "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": 2023010000619}, "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": "January 12 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 14 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": 67013.1785339726}, "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", "Russian Federation"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 48.5}, "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": 96.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "96.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 94.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 98.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.0}, "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": [[[[94.38, 50.2], [94.25, 50.5], [94.47, 51.03], [95.0, 51.25], [95.25, 51.15], [95.5, 51.25], [95.75, 51.15], [96.0, 51.25], [96.25, 51.15], [96.5, 51.25], [97.03, 51.03], [97.18, 50.68], [97.25, 50.65], [97.5, 50.75], [98.03, 50.53], [98.25, 50.0], [98.04, 49.5], [98.25, 49.0], [98.15, 48.75], [98.18, 48.68], [98.25, 48.65], [98.5, 48.75], [99.03, 48.53], [99.25, 48.0], [99.03, 47.47], [98.68, 47.32], [98.53, 46.97], [98.0, 46.75], [97.75, 46.85], [97.68, 46.82], [97.53, 46.47], [97.0, 46.25], [96.47, 46.47], [96.25, 47.0], [96.35, 47.25], [96.32, 47.32], [96.0, 47.46], [95.5, 47.25], [95.25, 47.35], [95.0, 47.25], [94.47, 47.47], [94.25, 48.0], [94.38, 48.3], [93.97, 48.47], [93.75, 49.0], [93.85, 49.25], [93.75, 49.5], [93.97, 50.03], [94.38, 50.2]], [[95.35, 48.75], [95.32, 48.82], [95.25, 48.85], [95.18, 48.82], [95.13, 48.7], [95.25, 48.65], [95.32, 48.68], [95.35, 48.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 49.5], [93.97, 50.03], [94.38, 50.2], [94.25, 50.5], [94.47, 51.03], [95.0, 51.25], [95.25, 51.15], [95.5, 51.25], [95.75, 51.15], [96.0, 51.25], [96.25, 51.15], [96.5, 51.25], [97.03, 51.03], [97.18, 50.68], [97.25, 50.65], [97.5, 50.75], [98.03, 50.53], [98.25, 50.0], [98.04, 49.5], [98.25, 49.0], [98.15, 48.75], [98.18, 48.68], [98.25, 48.65], [98.5, 48.75], [99.03, 48.53], [99.25, 48.0], [99.03, 47.47], [98.68, 47.32], [98.53, 46.97], [98.0, 46.75], [97.75, 46.85], [97.68, 46.82], [97.53, 46.47], [97.0, 46.25], [96.47, 46.47], [96.25, 47.0], [96.35, 47.25], [96.32, 47.32], [96.0, 47.46], [95.5, 47.25], [95.25, 47.35], [95.0, 47.25], [94.47, 47.47], [94.25, 48.0], [94.38, 48.3], [93.97, 48.47], [93.75, 49.0], [93.85, 49.25], [93.75, 49.5]], [[95.25, 48.65], [95.32, 48.68], [95.35, 48.75], [95.32, 48.82], [95.25, 48.85], [95.18, 48.82], [95.13, 48.7], [95.25, 48.65]]]]}, "2023-01-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 49.5], [93.97, 50.03], [94.38, 50.2], [94.25, 50.5], [94.47, 51.03], [95.0, 51.25], [95.25, 51.15], [95.5, 51.25], [95.75, 51.15], [96.0, 51.25], [96.25, 51.15], [96.5, 51.25], [97.03, 51.03], [97.18, 50.68], [97.25, 50.65], [97.5, 50.75], [98.03, 50.53], [98.25, 50.0], [98.04, 49.5], [98.25, 49.0], [98.15, 48.75], [98.18, 48.68], [98.25, 48.65], [98.5, 48.75], [99.03, 48.53], [99.25, 48.0], [99.03, 47.47], [98.68, 47.32], [98.53, 46.97], [98.0, 46.75], [97.75, 46.85], [97.68, 46.82], [97.53, 46.47], [97.0, 46.25], [96.47, 46.47], [96.25, 47.0], [96.35, 47.25], [96.32, 47.32], [96.0, 47.46], [95.5, 47.25], [95.25, 47.35], [95.0, 47.25], [94.47, 47.47], [94.25, 48.0], [94.38, 48.3], [93.97, 48.47], [93.75, 49.0], [93.85, 49.25], [93.75, 49.5]], [[95.25, 48.65], [95.32, 48.68], [95.35, 48.75], [95.32, 48.82], [95.25, 48.85], [95.18, 48.82], [95.13, 48.7], [95.25, 48.65]]]]}, "2023-01-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[93.75, 49.5], [93.97, 50.03], [94.38, 50.2], [94.25, 50.5], [94.47, 51.03], [95.0, 51.25], [95.25, 51.15], [95.5, 51.25], [95.75, 51.15], [96.0, 51.25], [96.25, 51.15], [96.5, 51.25], [97.03, 51.03], [97.18, 50.68], [97.25, 50.65], [97.5, 50.75], [98.03, 50.53], [98.25, 50.0], [98.04, 49.5], [98.25, 49.0], [98.15, 48.75], [98.18, 48.68], [98.25, 48.65], [98.5, 48.75], [99.03, 48.53], [99.25, 48.0], [99.03, 47.47], [98.68, 47.32], [98.53, 46.97], [98.0, 46.75], [97.75, 46.85], [97.68, 46.82], [97.53, 46.47], [97.0, 46.25], [96.47, 46.47], [96.25, 47.0], [96.35, 47.25], [96.32, 47.32], [96.0, 47.46], [95.5, 47.25], [95.25, 47.35], [95.0, 47.25], [94.47, 47.47], [94.25, 48.0], [94.38, 48.3], [93.97, 48.47], [93.75, 49.0], [93.85, 49.25], [93.75, 49.5]], [[95.25, 48.65], [95.32, 48.68], [95.35, 48.75], [95.32, 48.82], [95.25, 48.85], [95.18, 48.82], [95.13, 48.7], [95.25, 48.65]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.626616163361916}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.572777559885456}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-31.503711402388575, -35.26636555837621, -30.68701135990051]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-35.47542052871529, -39.609363140158365, -33.53117272527663]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-7.681116299712688, -11.36513438763506, -6.672081992308619]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-10.347525803755985, -13.626616163361916, -8.39242291618342]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7324177929206088, -2.544915362342553, -1.5124101786946358]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.3653234145883695, -3.0037595987416332, -2.0150673233680827]}}