{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:21.734704", "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": "2022-Aug-27_to_2022-Aug-31_92.5_65.5"}, "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": 2022080001171}, "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": "August 27 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 31 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 56507.87714107864}, "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": 65.5}, "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": 92.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "92.5\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": 97.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 66.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[97.53, 63.53], [97.75, 63.0], [97.53, 62.47], [97.0, 62.25], [96.75, 62.35], [96.68, 62.32], [96.53, 61.97], [96.0, 61.75], [95.47, 61.97], [95.25, 62.5], [95.38, 62.8], [95.25, 62.85], [95.0, 62.75], [94.75, 62.85], [94.5, 62.75], [93.97, 62.97], [93.82, 63.32], [93.75, 63.35], [93.5, 63.25], [92.97, 63.47], [92.82, 63.82], [92.75, 63.85], [92.5, 63.75], [92.25, 63.85], [92.0, 63.75], [91.47, 63.97], [91.32, 64.32], [91.25, 64.35], [91.0, 64.25], [90.75, 64.35], [90.5, 64.25], [89.97, 64.47], [89.75, 65.0], [89.85, 65.25], [89.82, 65.32], [89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [90.0, 66.75], [90.25, 66.65], [90.5, 66.75], [90.75, 66.65], [91.0, 66.75], [91.25, 66.65], [91.5, 66.75], [92.03, 66.53], [92.18, 66.18], [92.25, 66.15], [92.5, 66.25], [92.75, 66.15], [92.82, 66.18], [92.97, 66.53], [93.5, 66.75], [94.03, 66.53], [94.18, 66.18], [94.25, 66.15], [94.5, 66.25], [94.8, 66.13], [94.97, 66.53], [95.5, 66.75], [96.03, 66.53], [96.25, 66.0], [96.15, 65.75], [96.18, 65.68], [96.53, 65.53], [96.75, 65.0], [96.53, 64.47], [96.0, 64.25], [96.53, 64.03], [96.68, 63.68], [96.75, 63.65], [97.0, 63.75], [97.53, 63.53]], [[95.75, 64.35], [95.5, 64.25], [95.75, 64.15], [96.0, 64.25], [95.75, 64.35]], [[95.25, 64.35], [95.13, 64.3], [95.18, 64.18], [95.25, 64.15], [95.5, 64.25], [95.25, 64.35]]]]}}, "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": {"2022-08-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[92.75, 66.0], [92.97, 66.53], [93.5, 66.75], [94.03, 66.53], [94.18, 66.18], [94.25, 66.15], [94.5, 66.25], [94.8, 66.13], [94.97, 66.53], [95.5, 66.75], [96.03, 66.53], [96.25, 66.0], [96.15, 65.75], [96.18, 65.68], [96.53, 65.53], [96.75, 65.0], [96.53, 64.47], [96.0, 64.25], [95.75, 64.35], [95.5, 64.25], [95.25, 64.35], [95.0, 64.25], [94.75, 64.35], [94.5, 64.25], [94.25, 64.35], [94.0, 64.25], [93.47, 64.47], [93.32, 64.82], [92.97, 64.97], [92.75, 65.5], [92.85, 65.75], [92.75, 66.0]]]]}, "2022-08-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [90.0, 66.75], [90.25, 66.65], [90.5, 66.75], [90.75, 66.65], [91.0, 66.75], [91.25, 66.65], [91.5, 66.75], [92.03, 66.53], [92.18, 66.18], [92.25, 66.15], [92.5, 66.25], [92.75, 66.15], [92.82, 66.18], [92.97, 66.53], [93.5, 66.75], [94.03, 66.53], [94.18, 66.18], [94.25, 66.15], [94.5, 66.25], [94.8, 66.13], [94.97, 66.53], [95.5, 66.75], [96.03, 66.53], [96.25, 66.0], [96.15, 65.75], [96.18, 65.68], [96.53, 65.53], [96.75, 65.0], [96.53, 64.47], [96.0, 64.25], [96.53, 64.03], [96.68, 63.68], [97.03, 63.53], [97.25, 63.0], [97.03, 62.47], [96.68, 62.32], [96.53, 61.97], [96.0, 61.75], [95.47, 61.97], [95.25, 62.5], [95.38, 62.8], [95.25, 62.85], [95.0, 62.75], [94.75, 62.85], [94.5, 62.75], [93.97, 62.97], [93.82, 63.32], [93.75, 63.35], [93.5, 63.25], [92.97, 63.47], [92.82, 63.82], [92.75, 63.85], [92.5, 63.75], [92.25, 63.85], [92.0, 63.75], [91.47, 63.97], [91.32, 64.32], [91.25, 64.35], [91.0, 64.25], [90.75, 64.35], [90.5, 64.25], [89.97, 64.47], [89.75, 65.0], [89.85, 65.25], [89.82, 65.32], [89.47, 65.47]], [[95.75, 64.35], [95.5, 64.25], [95.75, 64.15], [96.0, 64.25], [95.75, 64.35]], [[95.25, 64.35], [95.13, 64.3], [95.18, 64.18], [95.25, 64.15], [95.5, 64.25], [95.25, 64.35]]]]}, "2022-08-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [90.0, 66.75], [90.25, 66.65], [90.5, 66.75], [90.75, 66.65], [91.0, 66.75], [91.25, 66.65], [91.5, 66.75], [92.03, 66.53], [92.18, 66.18], [92.25, 66.15], [92.5, 66.25], [92.75, 66.15], [92.82, 66.18], [92.97, 66.53], [93.5, 66.75], [94.03, 66.53], [94.18, 66.18], [94.25, 66.15], [94.5, 66.25], [94.8, 66.13], [94.97, 66.53], [95.5, 66.75], [96.03, 66.53], [96.25, 66.0], [96.15, 65.75], [96.18, 65.68], [96.53, 65.53], [96.75, 65.0], [96.53, 64.47], [96.0, 64.25], [96.53, 64.03], [96.68, 63.68], [96.75, 63.65], [97.0, 63.75], [97.53, 63.53], [97.75, 63.0], [97.53, 62.47], [97.0, 62.25], [96.75, 62.35], [96.68, 62.32], [96.53, 61.97], [96.0, 61.75], [95.47, 61.97], [95.25, 62.5], [95.38, 62.8], [95.25, 62.85], [95.0, 62.75], [94.75, 62.85], [94.5, 62.75], [93.97, 62.97], [93.82, 63.32], [93.75, 63.35], [93.5, 63.25], [92.97, 63.47], [92.82, 63.82], [92.75, 63.85], [92.5, 63.75], [92.25, 63.85], [92.0, 63.75], [91.47, 63.97], [91.32, 64.32], [91.25, 64.35], [91.0, 64.25], [90.75, 64.35], [90.5, 64.25], [89.97, 64.47], [89.75, 65.0], [89.85, 65.25], [89.82, 65.32], [89.47, 65.47]], [[95.75, 64.35], [95.5, 64.25], [95.75, 64.15], [96.0, 64.25], [95.75, 64.35]], [[95.25, 64.35], [95.13, 64.3], [95.18, 64.18], [95.25, 64.15], [95.5, 64.25], [95.25, 64.35]]]]}, "2022-08-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[89.47, 65.47], [89.25, 66.0], [89.47, 66.53], [90.0, 66.75], [90.25, 66.65], [90.5, 66.75], [90.75, 66.65], [91.0, 66.75], [91.25, 66.65], [91.5, 66.75], [92.03, 66.53], [92.18, 66.18], [92.25, 66.15], [92.5, 66.25], [92.75, 66.15], [93.0, 66.25], [93.53, 66.03], [93.68, 65.68], [94.03, 65.53], [94.18, 65.18], [94.53, 65.03], [94.68, 64.68], [95.03, 64.53], [95.18, 64.18], [95.25, 64.15], [95.5, 64.25], [95.75, 64.15], [96.0, 64.25], [96.53, 64.03], [96.68, 63.68], [96.75, 63.65], [97.0, 63.75], [97.53, 63.53], [97.75, 63.0], [97.53, 62.47], [97.0, 62.25], [96.75, 62.35], [96.68, 62.32], [96.53, 61.97], [96.0, 61.75], [95.47, 61.97], [95.25, 62.5], [95.38, 62.8], [95.25, 62.85], [95.0, 62.75], [94.75, 62.85], [94.5, 62.75], [93.97, 62.97], [93.82, 63.32], [93.75, 63.35], [93.5, 63.25], [92.97, 63.47], [92.82, 63.82], [92.75, 63.85], [92.5, 63.75], [92.25, 63.85], [92.0, 63.75], [91.47, 63.97], [91.32, 64.32], [91.25, 64.35], [91.0, 64.25], [90.75, 64.35], [90.5, 64.25], [89.97, 64.47], [89.75, 65.0], [89.85, 65.25], [89.82, 65.32], [89.47, 65.47]]]]}, "2022-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[97.0, 62.25], [96.47, 62.47], [96.25, 63.0], [96.47, 63.53], [97.0, 63.75], [97.53, 63.53], [97.75, 63.0], [97.53, 62.47], [97.0, 62.25]]], [[[90.97, 65.47], [90.75, 66.0], [90.97, 66.53], [91.5, 66.75], [92.03, 66.53], [92.2, 66.13], [92.5, 66.25], [92.75, 66.15], [93.0, 66.25], [93.53, 66.03], [93.68, 65.68], [94.03, 65.53], [94.25, 65.0], [94.03, 64.47], [93.5, 64.25], [93.25, 64.35], [93.0, 64.25], [92.47, 64.47], [92.32, 64.82], [91.97, 64.97], [91.8, 65.38], [91.5, 65.25], [90.97, 65.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.030080246056798}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.568899192062298}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.163865171831503, 3.8751039941864747, 4.287887187789181, 4.810396401420121, 4.704520069081752]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.2752721937758906, 2.376767761593385, 2.9573771015384978, 3.506096755235035, 4.237555998455434]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.506933554041092, -5.001082621934591, -4.562252694346562, -4.126253333914464, -4.065629996413037]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.6896782498657785, -6.030080246056798, -5.994618552748591, -4.521751325987054, -4.40310288349724]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4394708221912127, -1.5969340726181283, -1.465405661445157, -1.3043686402670283, -1.31259652713552]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.508597101228688, -1.905548887955198, -1.8941345258866091, -1.4042353898346283, -1.4343874928303235]}}