{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:19.424865", "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-May-12_to_2025-May-16_129.0_41.0"}, "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": 2025050001801}, "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": "May 12 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 16 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 5}, "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": 92724.54127936711}, "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", "Korea, Democratic People's Republic of"]}, "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": ["Sea of Japan"]}, "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": 41.0}, "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": 129.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "129.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 126.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 131.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 39.0}, "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": [[[[129.5, 39.25], [129.25, 39.35], [129.0, 39.25], [128.5, 39.46], [128.18, 39.32], [128.15, 39.25], [128.25, 39.0], 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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": {"2025-05-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[125.85, 41.25], [125.75, 41.5], [125.97, 42.03], [126.5, 42.25], [126.75, 42.15], [126.82, 42.18], [126.97, 42.53], [127.32, 42.68], [127.47, 43.03], [128.0, 43.25], [128.25, 43.15], [128.32, 43.18], [128.47, 43.53], [128.82, 43.68], [128.97, 44.03], [129.5, 44.25], [129.75, 44.15], [129.82, 44.18], [129.97, 44.53], [130.5, 44.75], [130.75, 44.65], [131.0, 44.75], [131.53, 44.53], [131.75, 44.0], [131.53, 43.47], [131.0, 43.25], [130.75, 43.35], [130.68, 43.32], [130.53, 42.97], [130.18, 42.82], [130.15, 42.75], [130.25, 42.5], [130.15, 42.25], [130.25, 42.0], [130.15, 41.75], [130.25, 41.5], [130.15, 41.25], [130.25, 41.0], [130.13, 40.7], [130.53, 40.53], [130.75, 40.0], [130.53, 39.47], [130.0, 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{"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.2725782926424}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.812013913874068, 18.04825922648115, 16.6102305094401, 16.184461636013452, 17.503459837942444]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [18.71038716634115, 20.83488235473635, 20.012134806315146, 19.920945739746116, 20.331939951578818]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.599014956879741, 6.623442934278489, 4.944595309956076, 4.100551308382829, 5.158438675561016]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.435247185727121, 8.961925962798034, 7.076935652850011, 4.999298185756857, 6.757354708305456]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5441081857154577, 2.2648470867371446, 1.728799941077518, 1.5548438306963854, 1.8446143991047237]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.1989978312623895, 2.788204648717339, 2.341120065748928, 1.9193003161249726, 2.1542367868498022]}}