{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:50:50.701786", "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-Jan-28_to_2023-Jan-31_114.5_38.0"}, "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": 2023010002919}, "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": "January 28 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 31 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": "Heat wave"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 70496.51793513403}, "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": 38.0}, "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": 114.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "114.5\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": 36.5}, "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": [[[[113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.35, 38.75], [113.25, 39.0], [113.47, 39.53], 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"polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-01-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.47, 37.47], [113.25, 38.0], [113.47, 38.53], [114.0, 38.75], [114.25, 38.65], [114.5, 38.75], [114.75, 38.65], [114.88, 38.7], [114.75, 39.0], [114.97, 39.53], [115.5, 39.75], [115.75, 39.65], [116.0, 39.75], [116.53, 39.53], [116.75, 39.0], [116.53, 38.47], [116.0, 38.25], [115.75, 38.35], [115.63, 38.3], [115.75, 38.0], [115.53, 37.47], [115.0, 37.25], [114.75, 37.35], [114.5, 37.25], [114.25, 37.35], [114.0, 37.25], [113.47, 37.47]]], [[[117.5, 38.75], [116.97, 38.97], [116.75, 39.5], [116.97, 40.03], [117.5, 40.25], [118.03, 40.03], [118.25, 39.5], [118.03, 38.97], [117.5, 38.75]]]]}, "2023-01-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[113.25, 37.0], [113.35, 37.25], [113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], 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"MultiPolygon", "coordinates": [[[[113.25, 37.0], [113.35, 37.25], [113.25, 37.5], [113.35, 37.75], [113.25, 38.0], [113.35, 38.25], [113.25, 38.5], [113.35, 38.75], [113.25, 39.0], [113.47, 39.53], [114.0, 39.75], [114.25, 39.65], [114.5, 39.75], [114.75, 39.65], [115.0, 39.75], [115.25, 39.65], [115.5, 39.75], [115.75, 39.65], [116.0, 39.75], [116.25, 39.65], [116.5, 39.75], [116.8, 39.63], [116.97, 40.03], [117.5, 40.25], [117.75, 40.15], [118.0, 40.25], [118.53, 40.03], [118.68, 39.68], [119.03, 39.53], [119.25, 39.0], [119.03, 38.47], [118.5, 38.25], [118.2, 38.38], [118.15, 38.25], [118.25, 38.0], [118.03, 37.47], [117.5, 37.25], [117.25, 37.35], [117.18, 37.32], [117.03, 36.97], [116.68, 36.82], [116.53, 36.47], [116.18, 36.32], [116.03, 35.97], [115.5, 35.75], [115.25, 35.85], [115.0, 35.75], [114.5, 35.96], [114.0, 35.75], [113.47, 35.97], [113.25, 36.5], [113.35, 36.75], [113.25, 37.0]], [[114.7, 37.13], [114.82, 37.18], [114.88, 37.3], [114.75, 37.35], [114.68, 37.32], [114.65, 37.25], [114.7, 37.13]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.20267768698875}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.567118676914898}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.0439850945736, 2.3421096486434294, 2.2000851675431363, 4.947038133283172]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [4.0010944360149665, 4.194448619061291, 4.398365070746991, 6.465983045976998]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.5812539646137886, 3.853535587670165, 3.6588453916197814, 6.392947060896357]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.831128584891985, 4.66640721391542, 5.596022266217005, 7.20267768698875]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.489691910193564, 1.5119169947690694, 1.4073937459814234, 2.468742811312437]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.095372112436603, 1.908158867423214, 1.8346221577118327, 2.999957794282735]}}