{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:11.545374", "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-30_to_2025-Oct-06_213.0_58.5"}, "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": 2025090002996}, "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 30 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 06 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 50688.15918430436}, "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": ["United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America"]}, "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": 58.5}, "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": 213.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "213.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 210.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 217.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-148.63, 58.8], [-148.75, 58.85], [-148.82, 58.82], [-148.97, 58.47], [-149.5, 58.25], [-150.03, 58.47], [-150.25, 59.0], 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57.97], [-148.75, 58.5], [-148.63, 58.8]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-148.0, 57.75], [-148.53, 57.97], [-148.75, 58.5], [-148.53, 59.03], [-148.0, 59.25], [-147.75, 59.15], [-147.5, 59.25], [-147.25, 59.15], [-147.0, 59.25], [-146.47, 59.03], [-146.25, 58.5], [-146.47, 57.97], [-147.0, 57.75], [-147.25, 57.85], [-147.5, 57.75], [-147.75, 57.85], [-148.0, 57.75]]]]}, "2025-10-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-148.0, 57.75], [-148.53, 57.97], [-148.75, 58.5], [-148.53, 59.03], [-148.0, 59.25], [-147.75, 59.15], [-147.5, 59.25], [-147.25, 59.15], [-147.0, 59.25], [-146.47, 59.03], [-146.25, 58.5], [-146.47, 57.97], [-147.0, 57.75], [-147.25, 57.85], [-147.5, 57.75], [-147.75, 57.85], [-148.0, 57.75]]]]}, "2025-10-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-148.0, 57.75], [-148.53, 57.97], [-148.75, 58.5], [-148.53, 59.03], [-148.0, 59.25], [-147.75, 59.15], [-147.5, 59.25], [-147.25, 59.15], [-147.0, 59.25], [-146.47, 59.03], [-146.25, 58.5], [-146.47, 57.97], [-147.0, 57.75], [-147.25, 57.85], [-147.5, 57.75], [-147.75, 57.85], [-148.0, 57.75]]]]}, "2025-10-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-150.25, 59.5], [-150.03, 60.03], [-149.5, 60.25], [-149.25, 60.15], [-149.0, 60.25], [-148.75, 60.15], [-148.5, 60.25], [-148.25, 60.15], [-148.18, 60.18], [-148.03, 60.53], [-147.5, 60.75], [-147.25, 60.65], [-147.0, 60.75], [-146.75, 60.65], [-146.5, 60.75], [-146.25, 60.65], [-146.0, 60.75], [-145.47, 60.53], [-145.32, 60.18], [-144.97, 60.03], [-144.82, 59.68], [-144.75, 59.65], [-144.5, 59.75], [-144.25, 59.65], [-144.0, 59.75], [-143.75, 59.65], 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1.3311278908554043]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.6306660401796635, 1.246728365780572, 1.1664809615372587, 1.641830352565707, 1.5918873102778346, 2.0988502469580768, 1.3311278908554043]}}