{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:50.577941", "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-20_to_2025-Apr-23_19.0_45.5"}, "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": 2025040002217}, "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 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 23 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": 98940.53190294291}, "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": ["Austria", "Bosnia and Herzegovina", "Croatia", "Hungary", "Romania", "Serbia", "Slovenia"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["Europe", "Europe", "Europe", "Europe", "Europe", "Europe", "Europe"]}, "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": 45.5}, "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": 19.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "19.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 15.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 21.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 45.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 47.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[14.97, 47.03], [15.5, 47.25], [15.75, 47.15], [15.82, 47.18], [15.97, 47.53], [16.5, 47.75], [17.03, 47.53], [17.18, 47.18], 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{"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[15.38, 45.8], [14.97, 45.97], [14.75, 46.5], [14.97, 47.03], [15.5, 47.25], [15.75, 47.15], [15.82, 47.18], [15.97, 47.53], [16.5, 47.75], [17.03, 47.53], [17.18, 47.18], [17.25, 47.15], [17.5, 47.25], [17.75, 47.15], [17.82, 47.18], [17.97, 47.53], [18.5, 47.75], [18.75, 47.65], [19.0, 47.75], [19.25, 47.65], [19.5, 47.75], [19.75, 47.65], [20.0, 47.75], [20.53, 47.53], [20.75, 47.0], [20.53, 46.47], [20.18, 46.32], [20.07, 46.07], [20.5, 46.25], [20.75, 46.15], [21.0, 46.25], [21.53, 46.03], [21.75, 45.5], [21.65, 45.25], [21.75, 45.0], [21.53, 44.47], [21.0, 44.25], [20.75, 44.35], [20.5, 44.25], [20.25, 44.35], [20.0, 44.25], [19.47, 44.47], [19.3, 44.88], [19.18, 44.82], [19.03, 44.47], [18.5, 44.25], [18.25, 44.35], [18.0, 44.25], [17.75, 44.35], [17.5, 44.25], [17.25, 44.35], [17.0, 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