{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:01:01.231920", "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-Sep-27_to_2024-Sep-29_83.0_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": 2024090000601}, "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": "September 27 2024"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 29 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": 67744.93449597324}, "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": ["China", "Kazakhstan"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 48.5}, "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": 83.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "83.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 82.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 88.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.5}, "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": [[[[81.25, 49.0], [81.35, 49.25], [81.25, 49.5], [81.35, 49.75], [81.25, 50.0], [81.47, 50.53], [81.82, 50.68], [81.97, 51.03], [82.5, 51.25], [83.03, 51.03], [83.18, 50.68], [83.53, 50.53], [83.75, 50.0], [83.63, 49.7], [84.03, 49.53], [84.18, 49.18], [84.25, 49.15], [84.5, 49.25], [85.0, 49.04], [85.5, 49.25], [86.03, 49.03], [86.2, 48.63], [86.5, 48.75], [86.75, 48.65], [87.0, 48.75], [87.25, 48.65], [87.5, 48.75], [88.03, 48.53], [88.18, 48.18], [88.53, 48.03], [88.75, 47.5], [88.53, 46.97], [88.0, 46.75], [87.75, 46.85], [87.5, 46.75], [87.0, 46.96], [86.5, 46.75], [86.25, 46.85], [86.0, 46.75], [85.75, 46.85], [85.5, 46.75], [85.25, 46.85], [85.0, 46.75], [84.75, 46.85], [84.5, 46.75], [84.25, 46.85], [84.0, 46.75], [83.5, 46.96], [83.0, 46.75], [82.47, 46.97], [82.32, 47.32], [82.25, 47.35], [82.0, 47.25], [81.47, 47.47], [81.25, 48.0], [81.35, 48.25], [81.25, 48.5], [81.35, 48.75], [81.25, 49.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.Siberia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2024-09-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.25, 48.5], [81.35, 48.75], [81.25, 49.0], [81.35, 49.25], [81.25, 49.5], [81.35, 49.75], [81.25, 50.0], [81.47, 50.53], [81.82, 50.68], [81.97, 51.03], [82.5, 51.25], [83.03, 51.03], [83.18, 50.68], [83.53, 50.53], [83.75, 50.0], [83.63, 49.7], [84.03, 49.53], [84.18, 49.18], [84.25, 49.15], [84.5, 49.25], [85.0, 49.04], [85.5, 49.25], [86.03, 49.03], [86.2, 48.63], [86.5, 48.75], [86.75, 48.65], [87.0, 48.75], [87.25, 48.65], [87.5, 48.75], [88.03, 48.53], [88.18, 48.18], [88.53, 48.03], [88.75, 47.5], [88.53, 46.97], [88.0, 46.75], [87.75, 46.85], [87.5, 46.75], [87.0, 46.96], [86.5, 46.75], [86.25, 46.85], [86.0, 46.75], [85.75, 46.85], [85.5, 46.75], [85.25, 46.85], [85.0, 46.75], [84.75, 46.85], [84.5, 46.75], [84.25, 46.85], [84.0, 46.75], [83.5, 46.96], [83.0, 46.75], [82.47, 46.97], [82.32, 47.32], [82.25, 47.35], [82.0, 47.25], [81.47, 47.47], [81.25, 48.0], [81.35, 48.25], [81.25, 48.5]]]]}, "2024-09-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.25, 48.5], [81.35, 48.75], [81.25, 49.0], [81.35, 49.25], [81.25, 49.5], [81.35, 49.75], [81.25, 50.0], [81.47, 50.53], [81.82, 50.68], [81.97, 51.03], [82.5, 51.25], [83.03, 51.03], [83.18, 50.68], [83.53, 50.53], [83.75, 50.0], [83.63, 49.7], [84.03, 49.53], [84.18, 49.18], [84.25, 49.15], [84.5, 49.25], [85.0, 49.04], [85.5, 49.25], [86.03, 49.03], [86.2, 48.63], [86.5, 48.75], [86.75, 48.65], [87.0, 48.75], [87.25, 48.65], [87.5, 48.75], [88.03, 48.53], [88.18, 48.18], [88.53, 48.03], [88.75, 47.5], [88.53, 46.97], [88.0, 46.75], [87.75, 46.85], [87.5, 46.75], [87.0, 46.96], [86.5, 46.75], [86.25, 46.85], [86.0, 46.75], [85.75, 46.85], [85.5, 46.75], [85.25, 46.85], [85.0, 46.75], [84.75, 46.85], [84.5, 46.75], [84.25, 46.85], [84.0, 46.75], [83.5, 46.96], [83.0, 46.75], [82.47, 46.97], [82.32, 47.32], [82.25, 47.35], [82.0, 47.25], [81.47, 47.47], [81.25, 48.0], [81.35, 48.25], [81.25, 48.5]]]]}, "2024-09-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.25, 48.5], [81.35, 48.75], [81.25, 49.0], [81.35, 49.25], [81.25, 49.5], [81.35, 49.75], [81.25, 50.0], [81.47, 50.53], [81.82, 50.68], [81.97, 51.03], [82.5, 51.25], [83.03, 51.03], [83.18, 50.68], [83.53, 50.53], [83.75, 50.0], [83.63, 49.7], [84.03, 49.53], [84.18, 49.18], [84.25, 49.15], [84.5, 49.25], [85.0, 49.04], [85.5, 49.25], [86.03, 49.03], [86.2, 48.63], [86.5, 48.75], [86.75, 48.65], [87.0, 48.75], [87.25, 48.65], [87.5, 48.75], [88.03, 48.53], [88.18, 48.18], [88.53, 48.03], [88.75, 47.5], [88.53, 46.97], [88.0, 46.75], [87.75, 46.85], [87.5, 46.75], [87.0, 46.96], [86.5, 46.75], [86.25, 46.85], [86.0, 46.75], [85.75, 46.85], [85.5, 46.75], [85.25, 46.85], [85.0, 46.75], [84.75, 46.85], [84.5, 46.75], [84.25, 46.85], [84.0, 46.75], [83.5, 46.96], [83.0, 46.75], [82.47, 46.97], [82.32, 47.32], [82.25, 47.35], [82.0, 47.25], [81.47, 47.47], [81.25, 48.0], [81.35, 48.25], [81.25, 48.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -9.840739334254408}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -6.679906335617778}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [3.821478895707571, 2.024438245368742, 3.956350445988221]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [0.4098208109538177, -0.8376296997070085, 1.2754989624023665]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-6.207003110463659, -7.934996077676861, -5.89771981871282]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.575554569241035, -9.840739334254408, -6.459579060498925]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.5448028814021397, -2.044037785928366, -1.5185609837997889]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8343659312376337, -2.3590701285092, -1.7374500362158316]}}