{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 09:19:04.985454", "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": "2019-Feb-06_to_2019-Feb-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": 2019020000218}, "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": "February 06 2019"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 10 2019"}, "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": 97070.85993306428}, "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": ["Yellow Sea"]}, "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": 113.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 36.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 39.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2019-02-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 38.0], [113.47, 38.53], [114.0, 38.75], [114.25, 38.65], [114.32, 38.68], [114.35, 38.75], [114.25, 39.0], [114.47, 39.53], [115.0, 39.75], [115.25, 39.65], [115.32, 39.68], [115.47, 40.03], [116.0, 40.25], [116.53, 40.03], [116.75, 39.5], [116.53, 38.97], [116.18, 38.82], [116.15, 38.75], [116.25, 38.5], [116.03, 37.97], [115.5, 37.75], [115.25, 37.85], [115.18, 37.82], [115.03, 37.47], [114.5, 37.25], [114.25, 37.35], [114.0, 37.25], [113.47, 37.47], [113.25, 38.0]]], [[[117.47, 38.47], [117.25, 39.0], [117.47, 39.53], [118.0, 39.75], [118.53, 39.53], [118.75, 39.0], [118.53, 38.47], [118.0, 38.25], [117.47, 38.47]]]]}, "2019-02-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.46, 37.5], [113.25, 38.0], [113.47, 38.53], [113.82, 38.68], [113.85, 38.75], [113.75, 39.0], [113.97, 39.53], [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], [116.25, 40.15], [116.5, 40.25], [116.75, 40.15], [117.0, 40.25], [117.25, 40.15], [117.5, 40.25], [117.75, 40.15], [118.0, 40.25], [118.53, 40.03], [118.75, 39.5], [118.65, 39.25], [118.75, 39.0], [118.53, 38.47], [118.18, 38.32], [118.15, 38.25], [118.25, 38.0], [118.03, 37.47], [117.5, 37.25], [117.25, 37.35], [117.0, 37.25], [116.75, 37.35], [116.68, 37.32], [116.65, 37.25], [116.75, 37.0], [116.53, 36.47], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.18, 36.32], [115.03, 35.97], [114.5, 35.75], [114.25, 35.85], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0], [113.46, 37.5]]]]}, "2019-02-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.46, 37.5], [113.25, 38.0], [113.47, 38.53], [113.82, 38.68], [113.85, 38.75], [113.75, 39.0], [113.97, 39.53], [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], [116.25, 40.15], [116.5, 40.25], [116.75, 40.15], [117.0, 40.25], [117.25, 40.15], [117.5, 40.25], [117.75, 40.15], [118.0, 40.25], [118.53, 40.03], [118.75, 39.5], [118.65, 39.25], [118.75, 39.0], [118.53, 38.47], [118.18, 38.32], [118.15, 38.25], [118.25, 38.0], [118.03, 37.47], [117.5, 37.25], [117.25, 37.35], [117.0, 37.25], [116.75, 37.35], [116.68, 37.32], [116.65, 37.25], [116.75, 37.0], [116.53, 36.47], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.18, 36.32], [115.03, 35.97], [114.5, 35.75], [114.25, 35.85], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0], [113.46, 37.5]]]]}, "2019-02-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.46, 37.5], [113.25, 38.0], [113.47, 38.53], [113.82, 38.68], [113.85, 38.75], [113.75, 39.0], [113.97, 39.53], [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], [116.25, 40.15], [116.5, 40.25], [116.75, 40.15], [117.0, 40.25], [117.25, 40.15], [117.5, 40.25], [117.75, 40.15], [118.0, 40.25], [118.53, 40.03], [118.75, 39.5], [118.65, 39.25], [118.75, 39.0], [118.53, 38.47], [118.18, 38.32], [118.15, 38.25], [118.25, 38.0], [118.03, 37.47], [117.5, 37.25], [117.25, 37.35], [117.0, 37.25], [116.75, 37.35], [116.68, 37.32], [116.65, 37.25], [116.75, 37.0], [116.53, 36.47], [116.0, 36.25], [115.75, 36.35], [115.5, 36.25], [115.25, 36.35], [115.18, 36.32], [115.03, 35.97], [114.5, 35.75], [114.25, 35.85], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0], [113.46, 37.5]]]]}, "2019-02-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.46, 37.5], [113.25, 38.0], [113.47, 38.53], [113.82, 38.68], [113.85, 38.75], [113.75, 39.0], [113.97, 39.53], [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], [116.25, 40.15], [116.5, 40.25], [116.75, 40.15], [117.0, 40.25], [117.25, 40.15], [117.5, 40.25], [117.75, 40.15], [118.0, 40.25], [118.53, 40.03], [118.75, 39.5], [118.53, 38.97], [118.18, 38.82], [118.03, 38.47], [117.68, 38.32], [117.53, 37.97], [117.18, 37.82], [117.03, 37.47], [116.5, 37.25], [116.25, 37.35], [116.18, 37.32], [116.15, 37.25], [116.25, 37.0], [116.03, 36.47], [115.5, 36.25], [115.25, 36.35], [115.18, 36.32], [115.03, 35.97], [114.5, 35.75], [114.25, 35.85], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0], [113.46, 37.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.8696182701539215}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.210635372043252}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.695290933683623, -5.57927347228366, -5.241699841511206, -5.026761525562051, -5.0314245568701494]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-6.235219871076197, -8.747516168093284, -8.757097178502477, -8.602700490490122, -8.58580424916039]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-3.941499261026067, -5.341971471829263, -5.171599022468617, -5.166585891713105, -5.452490610069403]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-5.071285339786471, -6.8696182701539215, -6.379572963856788, -6.316699375186317, -6.680073570408354]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.3462947176682305, -1.688313705040957, -1.5447845600513967, -1.531228877575448, -1.5758925227157559]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.4551418103854754, -2.0966594106588103, -1.95106177313585, -1.7143489707794495, -1.9234350353658929]}}