{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:56.565777", "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": "2025-Apr-30_to_2025-May-02_111.5_32.5"}, "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": 2025040002862}, "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": "April 30 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 02 2025"}, "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": "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": 67366.20338278083}, "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": 32.5}, "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": 111.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "111.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 111.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 114.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 31.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 34.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[110.25, 33.5], [110.47, 34.03], [111.0, 34.25], [111.25, 34.15], [111.32, 34.18], [111.35, 34.25], [111.25, 34.5], [111.47, 35.03], [112.0, 35.25], [112.25, 35.15], [112.5, 35.25], [113.03, 35.03], [113.18, 34.68], [113.53, 34.53], [113.68, 34.18], [114.03, 34.03], [114.18, 33.68], [114.53, 33.53], [114.75, 33.0], [114.65, 32.75], [114.75, 32.5], [114.53, 31.97], [114.0, 31.75], [113.75, 31.85], [113.5, 31.75], [113.25, 31.85], [113.0, 31.75], [112.7, 31.88], [112.65, 31.75], [112.75, 31.5], [112.53, 30.97], [112.0, 30.75], [111.75, 30.85], [111.5, 30.75], [110.97, 30.97], [110.75, 31.5], [110.85, 31.75], [110.82, 31.82], [110.47, 31.97], [110.25, 32.5], [110.35, 32.75], [110.25, 33.0], [110.35, 33.25], [110.25, 33.5]]]]}}, "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": {"2025-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 33.0], [110.35, 33.25], [110.25, 33.5], [110.47, 34.03], [111.0, 34.25], [111.25, 34.15], [111.32, 34.18], [111.35, 34.25], [111.25, 34.5], [111.47, 35.03], [112.0, 35.25], [112.25, 35.15], [112.5, 35.25], [113.03, 35.03], [113.18, 34.68], [113.53, 34.53], [113.68, 34.18], [114.03, 34.03], [114.18, 33.68], [114.53, 33.53], [114.75, 33.0], [114.65, 32.75], [114.75, 32.5], [114.53, 31.97], [114.0, 31.75], [113.75, 31.85], [113.5, 31.75], [113.25, 31.85], [113.0, 31.75], [112.7, 31.88], [112.65, 31.75], [112.75, 31.5], [112.53, 30.97], [112.0, 30.75], [111.75, 30.85], [111.5, 30.75], [110.97, 30.97], [110.75, 31.5], [110.85, 31.75], [110.82, 31.82], [110.47, 31.97], [110.25, 32.5], [110.35, 32.75], [110.25, 33.0]]]]}, "2025-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 33.0], [110.35, 33.25], [110.25, 33.5], [110.47, 34.03], [111.0, 34.25], [111.25, 34.15], [111.32, 34.18], [111.35, 34.25], [111.25, 34.5], [111.47, 35.03], [112.0, 35.25], [112.25, 35.15], [112.5, 35.25], [113.03, 35.03], [113.18, 34.68], [113.53, 34.53], [113.68, 34.18], [114.03, 34.03], [114.18, 33.68], [114.53, 33.53], [114.75, 33.0], [114.65, 32.75], [114.75, 32.5], [114.53, 31.97], [114.0, 31.75], [113.75, 31.85], [113.5, 31.75], [113.25, 31.85], [113.0, 31.75], [112.7, 31.88], [112.65, 31.75], [112.75, 31.5], [112.53, 30.97], [112.0, 30.75], [111.75, 30.85], [111.5, 30.75], [110.97, 30.97], [110.75, 31.5], [110.85, 31.75], [110.82, 31.82], [110.47, 31.97], [110.25, 32.5], [110.35, 32.75], [110.25, 33.0]]]]}, "2025-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[110.25, 33.0], [110.35, 33.25], [110.25, 33.5], [110.47, 34.03], [111.0, 34.25], [111.25, 34.15], [111.32, 34.18], [111.35, 34.25], [111.25, 34.5], [111.47, 35.03], [112.0, 35.25], [112.25, 35.15], [112.5, 35.25], [113.03, 35.03], [113.18, 34.68], [113.53, 34.53], [113.68, 34.18], [114.03, 34.03], [114.18, 33.68], [114.53, 33.53], [114.75, 33.0], [114.65, 32.75], [114.75, 32.5], [114.53, 31.97], [114.0, 31.75], [113.75, 31.85], [113.5, 31.75], [113.25, 31.85], [113.0, 31.75], [112.7, 31.88], [112.65, 31.75], [112.75, 31.5], [112.53, 30.97], [112.0, 30.75], [111.75, 30.85], [111.5, 30.75], [110.97, 30.97], [110.75, 31.5], [110.85, 31.75], [110.82, 31.82], [110.47, 31.97], [110.25, 32.5], [110.35, 32.75], [110.25, 33.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 8.212197985045975}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.656194587843798}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [24.4816005022098, 25.240709608029135, 25.994309312869348]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [26.374450937906943, 27.832468922932946, 28.376955922444665]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.972567468356842, 5.648236681051871, 6.34777961412268]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [6.393293900829008, 6.836994160742506, 8.212197985045975]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4969057829678993, 1.6825828458525165, 1.935689394952638]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9456559412487278, 2.0094140476466436, 2.5300424725990864]}}