{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:58:18.798044", "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": "2024-Apr-10_to_2024-Apr-12_93.0_64.5"}, "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": 2024040000255}, "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": "April 10 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 12 2024"}, "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": 61695.05009056691}, "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": 64.5}, "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": 93.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "93.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 90.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 95.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 64.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[90.75, 67.15], [90.82, 67.18], [90.97, 67.53], [91.5, 67.75], [92.03, 67.53], [92.18, 67.18], [92.25, 67.15], [92.5, 67.25], [92.75, 67.15], [93.0, 67.25], [93.25, 67.15], [93.5, 67.25], [94.03, 67.03], [94.18, 66.68], [94.25, 66.65], [94.5, 66.75], [95.03, 66.53], [95.18, 66.18], [95.53, 66.03], [95.68, 65.68], [96.03, 65.53], [96.25, 65.0], [96.03, 64.47], [95.5, 64.25], [95.25, 64.35], [95.0, 64.25], [94.75, 64.35], [94.68, 64.32], [94.53, 63.97], [94.0, 63.75], [93.75, 63.85], [93.5, 63.75], [93.25, 63.85], [93.18, 63.82], [93.03, 63.47], [92.5, 63.25], [92.25, 63.35], [92.0, 63.25], [91.75, 63.35], [91.5, 63.25], [90.97, 63.47], [90.82, 63.82], [90.47, 63.97], [90.32, 64.32], [89.97, 64.47], [89.75, 65.0], [89.88, 65.3], [89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [89.82, 66.68], [89.97, 67.03], [90.5, 67.25], [90.75, 67.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Russian-Arctic", "W.Siberia", "E.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-04-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.97, 67.03], [90.5, 67.25], [90.75, 67.15], [90.82, 67.18], [90.97, 67.53], [91.5, 67.75], [92.03, 67.53], [92.18, 67.18], [92.25, 67.15], [92.5, 67.25], [92.75, 67.15], [93.0, 67.25], [93.25, 67.15], [93.5, 67.25], [94.03, 67.03], [94.18, 66.68], [94.25, 66.65], [94.5, 66.75], [95.03, 66.53], [95.18, 66.18], [95.53, 66.03], [95.68, 65.68], [96.03, 65.53], [96.25, 65.0], [96.03, 64.47], [95.5, 64.25], [95.25, 64.35], [95.0, 64.25], [94.75, 64.35], [94.68, 64.32], [94.53, 63.97], [94.0, 63.75], [93.75, 63.85], [93.5, 63.75], [93.25, 63.85], [93.18, 63.82], [93.03, 63.47], [92.5, 63.25], [92.25, 63.35], [92.0, 63.25], [91.75, 63.35], [91.5, 63.25], [90.97, 63.47], [90.82, 63.82], [90.47, 63.97], [90.32, 64.32], [89.97, 64.47], [89.75, 65.0], [89.88, 65.3], [89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [89.82, 66.68], [89.97, 67.03]]]]}, "2024-04-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.97, 67.03], [90.5, 67.25], [90.75, 67.15], [90.82, 67.18], [90.97, 67.53], [91.5, 67.75], [92.03, 67.53], [92.18, 67.18], [92.25, 67.15], [92.5, 67.25], [92.75, 67.15], [93.0, 67.25], [93.25, 67.15], [93.5, 67.25], [94.03, 67.03], [94.18, 66.68], [94.25, 66.65], [94.5, 66.75], [95.03, 66.53], [95.18, 66.18], [95.53, 66.03], [95.68, 65.68], [96.03, 65.53], [96.25, 65.0], [96.03, 64.47], [95.5, 64.25], [95.25, 64.35], [95.0, 64.25], [94.75, 64.35], [94.68, 64.32], [94.53, 63.97], [94.0, 63.75], [93.75, 63.85], [93.5, 63.75], [93.25, 63.85], [93.18, 63.82], [93.03, 63.47], [92.5, 63.25], [92.25, 63.35], [92.0, 63.25], [91.75, 63.35], [91.5, 63.25], [90.97, 63.47], [90.82, 63.82], [90.47, 63.97], [90.32, 64.32], [89.97, 64.47], [89.75, 65.0], [89.88, 65.3], [89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [89.82, 66.68], [89.97, 67.03]]]]}, "2024-04-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.97, 67.03], [90.5, 67.25], [90.75, 67.15], [90.82, 67.18], [90.97, 67.53], [91.5, 67.75], [92.03, 67.53], [92.18, 67.18], [92.25, 67.15], [92.5, 67.25], [92.75, 67.15], [93.0, 67.25], [93.25, 67.15], [93.5, 67.25], [94.03, 67.03], [94.18, 66.68], [94.25, 66.65], [94.5, 66.75], [95.03, 66.53], [95.18, 66.18], [95.53, 66.03], [95.68, 65.68], [96.03, 65.53], [96.25, 65.0], [96.03, 64.47], [95.5, 64.25], [95.25, 64.35], [95.0, 64.25], [94.75, 64.35], [94.68, 64.32], [94.53, 63.97], [94.0, 63.75], [93.75, 63.85], [93.5, 63.75], [93.25, 63.85], [93.18, 63.82], [93.03, 63.47], [92.5, 63.25], [92.25, 63.35], [92.0, 63.25], [91.75, 63.35], [91.5, 63.25], [90.97, 63.47], [90.82, 63.82], [90.47, 63.97], [90.32, 64.32], [89.97, 64.47], [89.75, 65.0], [89.88, 65.3], [89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [89.82, 66.68], [89.97, 67.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -13.633508304353285}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -11.195926597680916}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-19.493539945478915, -21.869588256629186, -20.3749452271571]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-21.747077127112874, -24.03830116929393, -23.537540758031724]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-10.214696248736564, -12.532113376083524, -10.840970168222647]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-12.189219941906373, -13.633508304353285, -12.906687437007776]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5366046296136269, -1.8590457058841292, -1.630256767066969]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7407435421773683, -1.968404400830245, -2.025611935339838]}}