{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:56.892986", "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-Sep-10_to_2025-Sep-12_112.0_43.0"}, "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": 2025090001685}, "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": "September 10 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 12 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": 68109.64880071822}, "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", "Mongolia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Asia", "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": 43.0}, "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": 112.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "112.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 109.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 113.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 44.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[108.47, 43.03], [109.0, 43.25], [109.25, 43.15], [109.5, 43.25], [109.75, 43.15], [109.82, 43.18], [109.97, 43.53], [110.5, 43.75], [110.75, 43.65], [110.82, 43.68], [110.97, 44.03], [111.5, 44.25], [111.75, 44.15], [111.82, 44.18], [111.97, 44.53], [112.5, 44.75], [112.75, 44.65], [113.0, 44.75], [113.53, 44.53], [113.68, 44.18], [114.03, 44.03], [114.25, 43.5], [114.04, 43.0], [114.25, 42.5], [114.03, 41.97], [113.68, 41.82], [113.65, 41.75], [113.75, 41.5], [113.53, 40.97], [113.0, 40.75], [112.47, 40.97], [112.32, 41.32], [111.97, 41.47], [111.82, 41.82], [111.75, 41.85], [111.68, 41.82], [111.53, 41.47], [111.0, 41.25], [110.75, 41.35], [110.5, 41.25], [110.25, 41.35], [110.0, 41.25], [109.75, 41.35], [109.5, 41.25], [108.97, 41.47], [108.82, 41.82], [108.47, 41.97], [108.25, 42.5], [108.47, 43.03]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.C.Asia", "E.Asia"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.47, 41.97], [108.25, 42.5], [108.47, 43.03], [109.0, 43.25], [109.25, 43.15], [109.5, 43.25], [109.75, 43.15], [109.82, 43.18], [109.97, 43.53], [110.5, 43.75], [110.75, 43.65], [110.82, 43.68], [110.97, 44.03], [111.5, 44.25], [111.75, 44.15], [111.82, 44.18], [111.97, 44.53], [112.5, 44.75], [112.75, 44.65], [113.0, 44.75], [113.53, 44.53], [113.68, 44.18], [114.03, 44.03], [114.25, 43.5], [114.04, 43.0], [114.25, 42.5], [114.03, 41.97], [113.68, 41.82], [113.65, 41.75], [113.75, 41.5], [113.53, 40.97], [113.0, 40.75], [112.47, 40.97], [112.32, 41.32], [111.97, 41.47], [111.82, 41.82], [111.75, 41.85], [111.68, 41.82], [111.53, 41.47], [111.0, 41.25], [110.75, 41.35], [110.5, 41.25], [110.25, 41.35], [110.0, 41.25], [109.75, 41.35], [109.5, 41.25], [108.97, 41.47], [108.82, 41.82], [108.47, 41.97]]]]}, "2025-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.47, 41.97], [108.25, 42.5], [108.47, 43.03], [109.0, 43.25], [109.25, 43.15], [109.5, 43.25], [109.75, 43.15], [109.82, 43.18], [109.97, 43.53], [110.5, 43.75], [110.75, 43.65], [110.82, 43.68], [110.97, 44.03], [111.5, 44.25], [111.75, 44.15], [111.82, 44.18], [111.97, 44.53], [112.5, 44.75], [112.75, 44.65], [113.0, 44.75], [113.53, 44.53], [113.68, 44.18], [114.03, 44.03], [114.25, 43.5], [114.04, 43.0], [114.25, 42.5], [114.03, 41.97], [113.68, 41.82], [113.65, 41.75], [113.75, 41.5], [113.53, 40.97], [113.0, 40.75], [112.47, 40.97], [112.32, 41.32], [111.97, 41.47], [111.82, 41.82], [111.75, 41.85], [111.68, 41.82], [111.53, 41.47], [111.0, 41.25], [110.75, 41.35], [110.5, 41.25], [110.25, 41.35], [110.0, 41.25], [109.75, 41.35], [109.5, 41.25], [108.97, 41.47], [108.82, 41.82], [108.47, 41.97]]]]}, "2025-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[108.47, 41.97], [108.25, 42.5], [108.47, 43.03], [109.0, 43.25], [109.25, 43.15], [109.5, 43.25], [109.75, 43.15], [109.82, 43.18], [109.97, 43.53], [110.5, 43.75], [110.75, 43.65], [110.82, 43.68], [110.97, 44.03], [111.5, 44.25], [111.75, 44.15], [111.82, 44.18], [111.97, 44.53], [112.5, 44.75], [112.75, 44.65], [113.0, 44.75], [113.53, 44.53], [113.68, 44.18], [114.03, 44.03], [114.25, 43.5], [114.04, 43.0], [114.25, 42.5], [114.03, 41.97], [113.68, 41.82], [113.65, 41.75], [113.75, 41.5], [113.53, 40.97], [113.0, 40.75], [112.47, 40.97], [112.32, 41.32], [111.97, 41.47], [111.82, 41.82], [111.75, 41.85], [111.68, 41.82], [111.53, 41.47], [111.0, 41.25], [110.75, 41.35], [110.5, 41.25], [110.25, 41.35], [110.0, 41.25], [109.75, 41.35], [109.5, 41.25], [108.97, 41.47], [108.82, 41.82], [108.47, 41.97]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.23501896556985}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.686853843430998}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [22.641619449191637, 21.19735234578451, 21.752833048502623]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [24.113220469156943, 22.599370574951195, 23.274748738606775]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [6.361084230803848, 5.016036204033823, 5.683441095455324]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.23501896556985, 5.674724293520171, 6.688735941637333]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.657123993541864, 1.3761814097221676, 1.6207557153073926]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8942652001084446, 1.5140550807866393, 1.8913324591542278]}}