{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:56.627703", "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-03_107.5_33.0"}, "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": 2025040002863}, "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 03 2025"}, "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": 52077.836163116495}, "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": 33.0}, "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": 107.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "107.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 105.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 108.0}, "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": 34.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[104.47, 33.53], [105.0, 33.75], [105.25, 33.65], [105.38, 33.7], [105.25, 34.0], [105.47, 34.53], [106.0, 34.75], [106.25, 34.65], [106.5, 34.75], [107.03, 34.53], [107.25, 34.0], [107.15, 33.75], [107.18, 33.68], [107.25, 33.65], [107.5, 33.75], [107.75, 33.65], [108.0, 33.75], [108.53, 33.53], [108.75, 33.0], [108.53, 32.47], [108.0, 32.25], [107.75, 32.35], [107.68, 32.32], [107.65, 32.25], [107.75, 32.0], [107.53, 31.47], [107.0, 31.25], [106.75, 31.35], [106.68, 31.32], [106.53, 30.97], [106.0, 30.75], [105.75, 30.85], [105.5, 30.75], [104.97, 30.97], [104.82, 31.32], [104.47, 31.47], [104.25, 32.0], [104.35, 32.25], [104.25, 32.5], [104.35, 32.75], [104.25, 33.0], [104.47, 33.53]]]]}}, "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": [[[[105.75, 34.0], [105.97, 34.53], [106.5, 34.75], [107.03, 34.53], [107.25, 34.0], [107.15, 33.75], [107.2, 33.63], [107.5, 33.75], [108.03, 33.53], [108.25, 33.0], [108.03, 32.47], [107.5, 32.25], [106.97, 32.47], [106.8, 32.88], [106.5, 32.75], [105.97, 32.97], [105.75, 33.5], [105.85, 33.75], [105.75, 34.0]]]]}, "2025-05-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.25, 32.5], [104.35, 32.75], [104.25, 33.0], [104.47, 33.53], [105.0, 33.75], [105.25, 33.65], [105.38, 33.7], [105.25, 34.0], [105.47, 34.53], [106.0, 34.75], [106.25, 34.65], [106.5, 34.75], [107.03, 34.53], [107.25, 34.0], [107.15, 33.75], [107.18, 33.68], [107.25, 33.65], [107.5, 33.75], [107.75, 33.65], [108.0, 33.75], [108.53, 33.53], [108.75, 33.0], [108.53, 32.47], [108.0, 32.25], [107.75, 32.35], [107.68, 32.32], [107.65, 32.25], [107.75, 32.0], [107.53, 31.47], [107.0, 31.25], [106.75, 31.35], [106.68, 31.32], [106.53, 30.97], [106.0, 30.75], [105.75, 30.85], [105.5, 30.75], [104.97, 30.97], [104.82, 31.32], [104.47, 31.47], [104.25, 32.0], [104.35, 32.25], [104.25, 32.5]]]]}, "2025-05-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.25, 32.5], [104.35, 32.75], [104.25, 33.0], [104.47, 33.53], [105.0, 33.75], [105.25, 33.65], [105.38, 33.7], [105.25, 34.0], [105.47, 34.53], [106.0, 34.75], [106.25, 34.65], [106.5, 34.75], [107.03, 34.53], [107.25, 34.0], [107.15, 33.75], [107.18, 33.68], [107.25, 33.65], [107.5, 33.75], [107.75, 33.65], [108.0, 33.75], [108.53, 33.53], [108.75, 33.0], [108.53, 32.47], [108.0, 32.25], [107.75, 32.35], [107.68, 32.32], [107.65, 32.25], [107.75, 32.0], [107.53, 31.47], [107.0, 31.25], [106.75, 31.35], [106.68, 31.32], [106.53, 30.97], [106.0, 30.75], [105.75, 30.85], [105.5, 30.75], [104.97, 30.97], [104.82, 31.32], [104.47, 31.47], [104.25, 32.0], [104.35, 32.25], [104.25, 32.5]]]]}, "2025-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[104.25, 32.5], [104.35, 32.75], [104.25, 33.0], [104.47, 33.53], [105.0, 33.75], [105.25, 33.65], [105.38, 33.7], [105.25, 34.0], [105.47, 34.53], [106.0, 34.75], [106.53, 34.53], [106.75, 34.0], [106.57, 33.57], [107.0, 33.75], [107.25, 33.65], [107.5, 33.75], [107.75, 33.65], [108.0, 33.75], [108.53, 33.53], [108.75, 33.0], [108.53, 32.47], [108.0, 32.25], [107.75, 32.35], [107.68, 32.32], [107.65, 32.25], [107.75, 32.0], [107.53, 31.47], [107.0, 31.25], [106.75, 31.35], [106.68, 31.32], [106.53, 30.97], [106.0, 30.75], [105.75, 30.85], [105.5, 30.75], [104.97, 30.97], [104.82, 31.32], [104.47, 31.47], [104.25, 32.0], [104.35, 32.25], [104.25, 32.5]], [[106.25, 33.15], [106.32, 33.18], [106.43, 33.43], [106.13, 33.3], [106.18, 33.18], [106.25, 33.15]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.514772035691351}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.38278385406587}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [19.643087005615257, 22.65804672241211, 23.83977330525721, 23.650472118236394]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [22.521423594156943, 25.642853037516318, 27.86149368286135, 29.01600036621096]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.8200934177878594, 4.849368776263944, 6.027706972583178, 5.519334437095115]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.021541657107207, 5.81994545048542, 7.0765568533002465, 7.514772035691351]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3385508315768833, 1.7058172347491989, 2.154694954356116, 1.9101290449360941]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3669276718779122, 2.0977684361274984, 2.53192771744606, 2.5702371050941824]}}