{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:56:07.897952", "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": "2023-Nov-23_to_2023-Nov-26_116.5_40.0"}, "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": 2023110000513}, "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 23 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 26 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 4}, "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": 107532.75920478828}, "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": ["Bohai 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": 40.0}, "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": 116.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "116.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 114.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 118.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 37.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[113.35, 38.25], [113.25, 38.5], [113.47, 39.03], [113.82, 39.18], [113.97, 39.53], [114.32, 39.68], [114.47, 40.03], [114.82, 40.18], [114.85, 40.25], [114.75, 40.5], [114.97, 41.03], [115.5, 41.25], [115.75, 41.15], [115.82, 41.18], [115.97, 41.53], [116.5, 41.75], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [118.03, 42.03], [118.18, 41.68], [118.25, 41.65], [118.5, 41.75], [119.03, 41.53], [119.25, 41.0], [119.15, 40.75], [119.25, 40.5], [119.03, 39.97], [118.5, 39.75], [118.25, 39.85], [118.18, 39.82], [118.04, 39.5], [118.25, 39.0], [118.03, 38.47], [117.5, 38.25], [117.25, 38.35], [117.18, 38.32], [117.03, 37.97], [116.68, 37.82], [116.53, 37.47], [116.18, 37.32], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.7, 36.88], [114.53, 36.47], [114.0, 36.25], [113.47, 36.47], [113.25, 37.0], [113.35, 37.25], [113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25]]]]}}, "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": {"2023-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.47, 39.03], [113.82, 39.18], [113.97, 39.53], [114.32, 39.68], [114.47, 40.03], [114.82, 40.18], [114.85, 40.25], [114.75, 40.5], [114.97, 41.03], [115.5, 41.25], [115.75, 41.15], [115.82, 41.18], [115.97, 41.53], [116.5, 41.75], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [118.03, 42.03], [118.18, 41.68], [118.25, 41.65], [118.5, 41.75], [119.03, 41.53], [119.25, 41.0], [119.15, 40.75], [119.25, 40.5], [119.03, 39.97], [118.5, 39.75], [118.25, 39.85], [118.18, 39.82], [118.04, 39.5], [118.25, 39.0], [118.03, 38.47], [117.5, 38.25], [117.25, 38.35], [117.18, 38.32], [117.03, 37.97], [116.68, 37.82], [116.53, 37.47], [116.18, 37.32], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.7, 36.88], [114.53, 36.47], [114.0, 36.25], [113.47, 36.47], [113.25, 37.0], [113.35, 37.25], [113.25, 37.5]]]]}, "2023-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.47, 39.03], [113.82, 39.18], [113.97, 39.53], [114.32, 39.68], [114.47, 40.03], [114.82, 40.18], [114.85, 40.25], [114.75, 40.5], [114.97, 41.03], [115.5, 41.25], [115.75, 41.15], [115.82, 41.18], [115.97, 41.53], [116.5, 41.75], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [118.03, 42.03], [118.18, 41.68], [118.25, 41.65], [118.5, 41.75], [119.03, 41.53], [119.25, 41.0], [119.15, 40.75], [119.25, 40.5], [119.03, 39.97], [118.5, 39.75], [118.25, 39.85], [118.18, 39.82], [118.04, 39.5], [118.25, 39.0], [118.03, 38.47], [117.5, 38.25], [117.25, 38.35], [117.18, 38.32], [117.03, 37.97], [116.68, 37.82], [116.53, 37.47], [116.18, 37.32], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.7, 36.88], [114.53, 36.47], [114.0, 36.25], [113.47, 36.47], [113.25, 37.0], [113.35, 37.25], [113.25, 37.5]]]]}, "2023-11-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.47, 39.03], [113.82, 39.18], [113.97, 39.53], [114.32, 39.68], [114.47, 40.03], [114.82, 40.18], [114.85, 40.25], [114.75, 40.5], [114.97, 41.03], [115.5, 41.25], [115.75, 41.15], [115.82, 41.18], [115.97, 41.53], [116.5, 41.75], [116.75, 41.65], [116.82, 41.68], [116.97, 42.03], [117.5, 42.25], [118.03, 42.03], [118.18, 41.68], [118.25, 41.65], [118.5, 41.75], [119.03, 41.53], [119.25, 41.0], [119.15, 40.75], [119.25, 40.5], [119.03, 39.97], [118.5, 39.75], [118.25, 39.85], [118.18, 39.82], [118.04, 39.5], [118.25, 39.0], [118.03, 38.47], [117.5, 38.25], [117.25, 38.35], [117.18, 38.32], [117.03, 37.97], [116.68, 37.82], [116.53, 37.47], [116.18, 37.32], [116.03, 36.97], [115.5, 36.75], [115.25, 36.85], [115.0, 36.75], [114.7, 36.88], [114.53, 36.47], [114.0, 36.25], [113.47, 36.47], [113.25, 37.0], [113.35, 37.25], [113.25, 37.5]]]]}, "2023-11-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[114.5, 37.75], [113.97, 37.97], [113.75, 38.5], [113.97, 39.03], [114.5, 39.25], [114.75, 39.15], [115.0, 39.25], [115.3, 39.13], [115.35, 39.25], [115.25, 39.5], [115.47, 40.03], [115.82, 40.18], [115.97, 40.53], [116.5, 40.75], [116.75, 40.65], [117.0, 40.75], [117.53, 40.53], [117.75, 40.0], [117.53, 39.47], [117.0, 39.25], [116.75, 39.35], [116.68, 39.32], [116.65, 39.25], [116.75, 39.0], [116.53, 38.47], [116.0, 38.25], [115.7, 38.38], [115.53, 37.97], [115.0, 37.75], [114.75, 37.85], [114.5, 37.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -8.96277758611501}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.359597830752013}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-4.225693245822242, -5.207355763498924, -4.728978715771234, -2.374112540880958]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-12.01144060143588, -12.014458945939452, -10.395016508317951, -3.070902959045327]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.25345050923174, -5.8817256041739645, -5.158344279931068, -3.7491460726465675]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-8.96277758611501, -7.047188268772743, -6.4154759839751705, -3.9932765182219327]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6290226608916747, -1.8800662426964474, -1.72441604247222, -1.3756060620718713]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.5536429482015834, -2.317521719981796, -2.3007437589359494, -1.4529130745339447]}}