{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:36.626893", "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-Dec-19_to_2025-Dec-21_140.0_35.0"}, "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": 2025120002186}, "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": "December 19 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 21 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": 131031.54207685014}, "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": ["Japan"]}, "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": ["Pacific Ocean", "Philippine 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": 35.0}, "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": 140.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "140.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 136.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 141.0}, "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": 37.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[135.75, 33.0], [135.97, 33.53], [136.5, 33.75], [136.8, 33.63], [136.85, 33.75], [136.75, 34.0], [136.85, 34.25], 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30.75], [136.47, 30.97], [136.32, 31.32], [135.97, 31.47], [135.75, 32.0], [135.85, 32.25], [135.75, 32.5], [135.85, 32.75], [135.75, 33.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.Asia", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-19T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[135.75, 32.5], [135.85, 32.75], [135.75, 33.0], [135.97, 33.53], [136.5, 33.75], [136.8, 33.63], [136.85, 33.75], [136.75, 34.0], [136.85, 34.25], [136.82, 34.32], [136.75, 34.35], [136.5, 34.25], [135.97, 34.47], [135.75, 35.0], [135.85, 35.25], [135.75, 35.5], [135.85, 35.75], [135.75, 36.0], [135.97, 36.53], [136.32, 36.68], [136.47, 37.03], [137.0, 37.25], [137.25, 37.15], [137.32, 37.18], [137.47, 37.53], [138.0, 37.75], [138.53, 37.53], [138.75, 37.0], [138.53, 36.47], [138.18, 36.32], [138.03, 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[19.230911509196005, 20.976092274983728, 19.82956212361654]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.245503626327486, 6.1657908249514515, 4.117823734326168]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.397884301487636, 10.539688752921222, 5.175989664066776]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.6369535914648805, 2.3956665322017177, 1.6634178479199406]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.057751180464603, 3.2404808800865763, 2.028837936041575]}}