{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:43.657193", "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-Jan-11_to_2022-Jan-16_83.0_34.0"}, "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": 2022010000511}, "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 11 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 16 2022"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 79103.91853622084}, "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"]}, "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": 34.0}, "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": 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": 81.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 86.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 33.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 35.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[83.5, 35.75], [84.0, 35.54], [84.32, 35.68], [84.47, 36.03], [85.0, 36.25], [85.25, 36.15], [85.5, 36.25], [86.03, 36.03], [86.25, 35.5], [86.15, 35.25], [86.2, 35.13], [86.5, 35.25], [87.03, 35.03], [87.25, 34.5], [87.03, 33.97], [86.68, 33.82], [86.53, 33.47], [86.18, 33.32], [86.03, 32.97], [85.5, 32.75], [85.0, 32.96], [84.5, 32.75], [84.25, 32.85], [84.0, 32.75], [83.75, 32.85], [83.5, 32.75], [83.0, 32.96], [82.5, 32.75], [81.97, 32.97], [81.82, 33.32], [81.75, 33.35], [81.5, 33.25], [80.97, 33.47], [80.75, 34.0], [80.85, 34.25], [80.75, 34.5], [80.85, 34.75], [80.75, 35.0], [80.97, 35.53], [81.5, 35.75], [81.75, 35.65], [82.0, 35.75], [82.53, 35.53], [82.68, 35.18], [82.75, 35.15], [82.82, 35.18], [82.97, 35.53], [83.5, 35.75]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Tibetan-Plateau"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[81.25, 34.5], [81.47, 35.03], [82.0, 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standardized t2m anomalies.", "value": [-1.6058888470830823, -2.0500670337850964, -1.7746252243098646, -1.6447798785803827, -2.0177651036720845, -1.6409201910106084]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.8251370433017664, -2.7284870614503625, -2.5586025771059755, -2.3120387063463, -2.753175074563977, -2.073999007977522]}}