{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:15:35.955927", "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": "2021-Nov-30_to_2021-Dec-04_117.0_24.5"}, "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": 2021110001021}, "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": "November 30 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 04 2021"}, "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": 72473.83972348971}, "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": 24.5}, "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": 117.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "117.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 115.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 119.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 23.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 27.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[117.18, 23.82], [117.03, 23.47], [116.68, 23.32], [116.53, 22.97], [116.18, 22.82], [116.03, 22.47], [115.5, 22.25], [115.25, 22.35], [115.0, 22.25], [114.47, 22.47], [114.25, 23.0], [114.47, 23.53], [115.0, 23.75], [115.25, 23.65], [115.32, 23.68], [115.47, 24.03], [115.82, 24.18], [115.85, 24.25], [115.75, 24.5], [115.85, 24.75], [115.75, 25.0], [115.85, 25.25], [115.75, 25.5], [115.85, 25.75], [115.75, 26.0], [115.97, 26.53], [116.32, 26.68], [116.47, 27.03], [116.82, 27.18], [116.85, 27.25], [116.75, 27.5], [116.97, 28.03], [117.5, 28.25], [118.0, 28.04], [118.5, 28.25], [118.75, 28.15], [119.0, 28.25], [119.53, 28.03], [119.75, 27.5], [119.65, 27.25], [119.75, 27.0], [119.53, 26.47], [119.18, 26.32], [119.04, 26.0], [119.25, 25.5], [119.03, 24.97], [118.68, 24.82], [118.53, 24.47], [118.0, 24.25], [117.75, 24.35], [117.68, 24.32], [117.53, 23.97], [117.18, 23.82]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-11-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[116.47, 26.53], [117.0, 26.75], [117.53, 26.53], [117.75, 26.0], [117.53, 25.47], [117.0, 25.25], [116.47, 25.47], [116.25, 26.0], [116.47, 26.53]]]]}, "2021-12-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.0, 22.25], [114.47, 22.47], [114.25, 23.0], [114.47, 23.53], [115.0, 23.75], [115.25, 23.65], [115.32, 23.68], [115.47, 24.03], [115.82, 24.18], [115.85, 24.25], [115.75, 24.5], [115.85, 24.75], [115.75, 25.0], [115.85, 25.25], [115.75, 25.5], [115.85, 25.75], [115.75, 26.0], [115.97, 26.53], [116.32, 26.68], [116.47, 27.03], [116.82, 27.18], [116.85, 27.25], [116.75, 27.5], [116.97, 28.03], [117.5, 28.25], [118.0, 28.04], [118.5, 28.25], [118.75, 28.15], [119.0, 28.25], [119.53, 28.03], [119.75, 27.5], [119.65, 27.25], [119.75, 27.0], [119.53, 26.47], [119.18, 26.32], [119.04, 26.0], [119.25, 25.5], [119.03, 24.97], [118.68, 24.82], [118.53, 24.47], [118.0, 24.25], [117.75, 24.35], [117.68, 24.32], [117.53, 23.97], [117.18, 23.82], [117.03, 23.47], [116.68, 23.32], [116.53, 22.97], [116.18, 22.82], [116.03, 22.47], [115.5, 22.25], [115.25, 22.35], [115.0, 22.25]]]]}, "2021-12-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[115.0, 22.25], [114.47, 22.47], [114.25, 23.0], [114.47, 23.53], [115.0, 23.75], [115.25, 23.65], [115.32, 23.68], [115.47, 24.03], [115.82, 24.18], [115.85, 24.25], [115.75, 24.5], [115.85, 24.75], [115.75, 25.0], [115.85, 25.25], [115.75, 25.5], [115.85, 25.75], [115.75, 26.0], [115.97, 26.53], [116.32, 26.68], [116.47, 27.03], [116.82, 27.18], [116.85, 27.25], [116.75, 27.5], [116.97, 28.03], [117.5, 28.25], [118.0, 28.04], [118.5, 28.25], [118.75, 28.15], [119.0, 28.25], [119.53, 28.03], [119.75, 27.5], [119.65, 27.25], [119.75, 27.0], [119.53, 26.47], [119.18, 26.32], [119.04, 26.0], [119.25, 25.5], [119.03, 24.97], [118.68, 24.82], [118.53, 24.47], [118.0, 24.25], [117.75, 24.35], [117.68, 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6.234770723390227, 6.0753249291234965, 5.965136616792677, 9.986234042834951]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-4.271806010688692, -4.934156831117889, -5.088091405638975, -4.404946182832898, -4.179641458337073]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.271806010688692, -6.40744885013919, -6.244707834029555, -5.367387128049813, -4.179641458337073]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3021523437912998, -1.5985014066625316, -1.6755050516996213, -1.4565688093317604, -1.4297536016290588]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.3021523437912998, -1.9934597159506, -2.068746388888356, -1.7494045511246288, -1.4297536016290588]}}