{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-27 23:16:38.009429", "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": "2026-Aug-10_to_2026-Aug-14_112.5_29.0"}, "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": 2026080000346}, "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 10 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 14 2026"}, "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": 75164.25443553676}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia"]}, "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": 29.0}, "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": 112.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "112.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 111.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 27.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 32.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-08-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 29.5], [113.47, 30.03], [114.0, 30.25], [114.53, 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30.0]]]]}, "2026-08-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.46, 30.0], [111.25, 30.5], [111.47, 31.03], [111.82, 31.18], [111.85, 31.25], [111.75, 31.5], [111.85, 31.75], [111.75, 32.0], [111.85, 32.25], [111.75, 32.5], [111.97, 33.03], [112.5, 33.25], [113.03, 33.03], [113.18, 32.68], [113.53, 32.53], [113.75, 32.0], [113.54, 31.5], [113.75, 31.0], [113.65, 30.75], [113.75, 30.5], [113.65, 30.25], [113.68, 30.18], [113.75, 30.15], [114.0, 30.25], [114.53, 30.03], [114.68, 29.68], [115.03, 29.53], [115.25, 29.0], [115.03, 28.47], [114.63, 28.3], [114.75, 28.0], [114.53, 27.47], [114.0, 27.25], [113.75, 27.35], [113.5, 27.25], [113.25, 27.35], [113.0, 27.25], [112.75, 27.35], [112.5, 27.25], [111.97, 27.47], [111.75, 28.0], [111.85, 28.25], [111.82, 28.32], [111.47, 28.47], [111.25, 29.0], [111.35, 29.25], [111.25, 29.5], [111.46, 30.0]]]]}, "2026-08-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.46, 30.0], [111.25, 30.5], [111.47, 31.03], [111.82, 31.18], [111.85, 31.25], [111.75, 31.5], [111.85, 31.75], [111.75, 32.0], [111.85, 32.25], [111.75, 32.5], [111.97, 33.03], [112.5, 33.25], [113.03, 33.03], [113.18, 32.68], [113.53, 32.53], [113.75, 32.0], [113.54, 31.5], [113.75, 31.0], [113.65, 30.75], [113.75, 30.5], [113.65, 30.25], [113.68, 30.18], [114.03, 30.03], [114.25, 29.5], [114.15, 29.25], [114.25, 29.0], [114.15, 28.75], [114.18, 28.68], [114.53, 28.53], [114.75, 28.0], [114.53, 27.47], [114.0, 27.25], [113.75, 27.35], [113.5, 27.25], [113.25, 27.35], [113.0, 27.25], [112.75, 27.35], [112.5, 27.25], [111.97, 27.47], [111.75, 28.0], [111.85, 28.25], [111.82, 28.32], [111.47, 28.47], [111.25, 29.0], [111.35, 29.25], [111.25, 29.5], [111.46, 30.0]]]]}, "2026-08-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[111.85, 28.75], [111.75, 29.0], [111.97, 29.53], [112.32, 29.68], [112.47, 30.03], [113.0, 30.25], [113.25, 30.15], [113.5, 30.25], [114.03, 30.03], [114.25, 29.5], [114.15, 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23.905025736490927]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.3051039740123542, -4.239851800719579, -4.1729124263976365, -5.3072060771884315, -4.21084153175084]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-3.308805785260745, -4.886410472234672, -5.2911059908952325, -5.91886456549463, -4.724839179934975]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.4534899046921301, -1.6480230427254259, -1.5696036651805, -1.917034774391166, -1.5772232416014802]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.5701775646116216, -2.0021419250574137, 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