{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:22:09.906512", "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-08_to_2022-Aug-10_115.0_38.5"}, "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": 2022080000438}, "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 08 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 10 2022"}, "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": 53300.99440458001}, "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": 38.5}, "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": 115.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "115.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 113.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 116.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[113.47, 39.53], [114.0, 39.75], [114.25, 39.65], [114.5, 39.75], [114.75, 39.65], [114.82, 39.68], [114.97, 40.03], [115.5, 40.25], [115.75, 40.15], [116.0, 40.25], [116.53, 40.03], [116.75, 39.5], [116.65, 39.25], [116.75, 39.0], [116.53, 38.47], [116.18, 38.32], [116.15, 38.25], [116.25, 38.0], [116.15, 37.75], [116.25, 37.5], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.75, 36.85], [114.5, 36.75], [114.25, 36.85], [114.0, 36.75], [113.47, 36.97], [113.32, 37.32], [113.25, 37.35], [113.0, 37.25], [112.47, 37.47], [112.25, 38.0], [112.47, 38.53], [112.82, 38.68], [112.97, 39.03], [113.32, 39.18], [113.47, 39.53]]]]}}, "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": {"2022-08-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 39.03], [113.32, 39.18], [113.47, 39.53], [114.0, 39.75], [114.25, 39.65], [114.5, 39.75], [114.75, 39.65], [114.82, 39.68], [114.97, 40.03], [115.5, 40.25], [115.75, 40.15], [116.0, 40.25], [116.53, 40.03], [116.75, 39.5], [116.65, 39.25], [116.75, 39.0], [116.53, 38.47], [116.18, 38.32], [116.15, 38.25], [116.25, 38.0], [116.15, 37.75], [116.25, 37.5], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.75, 36.85], [114.5, 36.75], [114.25, 36.85], [114.0, 36.75], [113.47, 36.97], [113.32, 37.32], [113.25, 37.35], [113.0, 37.25], [112.47, 37.47], [112.25, 38.0], [112.47, 38.53], [112.82, 38.68], [112.97, 39.03]]]]}, "2022-08-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 39.03], [113.32, 39.18], [113.47, 39.53], [114.0, 39.75], [114.25, 39.65], [114.5, 39.75], [114.75, 39.65], [114.82, 39.68], [114.97, 40.03], [115.5, 40.25], [115.75, 40.15], [116.0, 40.25], [116.53, 40.03], [116.75, 39.5], [116.65, 39.25], [116.75, 39.0], [116.53, 38.47], [116.18, 38.32], [116.15, 38.25], [116.25, 38.0], [116.15, 37.75], [116.25, 37.5], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.75, 36.85], [114.5, 36.75], [114.25, 36.85], [114.0, 36.75], [113.47, 36.97], [113.32, 37.32], [113.25, 37.35], [113.0, 37.25], [112.47, 37.47], [112.25, 38.0], [112.47, 38.53], [112.82, 38.68], [112.97, 39.03]]]]}, "2022-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[112.97, 39.03], [113.32, 39.18], [113.47, 39.53], [114.0, 39.75], [114.25, 39.65], [114.5, 39.75], [114.75, 39.65], [114.82, 39.68], [114.97, 40.03], [115.5, 40.25], [115.75, 40.15], [116.0, 40.25], [116.53, 40.03], [116.75, 39.5], [116.65, 39.25], [116.75, 39.0], [116.53, 38.47], [116.18, 38.32], [116.15, 38.25], [116.25, 38.0], [116.15, 37.75], [116.25, 37.5], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.75, 36.85], [114.5, 36.75], [114.25, 36.85], [114.0, 36.75], [113.47, 36.97], [113.32, 37.32], [113.25, 37.35], [113.0, 37.25], [112.47, 37.47], [112.25, 38.0], [112.47, 38.53], [112.82, 38.68], [112.97, 39.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.78923891060299}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.541188063540601}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.39033869661597, 18.54109343495361, 21.607257928915942]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.92474290572062, 14.275210409045314, 18.655534302108663]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.003793683277567, -6.868486646058854, -3.751283861285383]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.7249875077902175, -7.78923891060299, -4.757823031563873]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7410061296919161, -3.9793536368800915, -2.153305496851341]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.2030627246182326, -4.408412322379233, -2.714870928880747]}}