{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:13.514054", "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-04_to_2025-May-06_264.5_49.5"}, "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": 2025050001235}, "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 04 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 06 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": 81073.6148918887}, "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": ["Canada", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 49.5}, "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": 264.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "264.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 264.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 267.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 46.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 50.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-96.75, 48.0], [-96.65, 48.25], [-96.75, 48.5], [-96.53, 49.03], [-96.18, 49.18], [-96.15, 49.25], [-96.25, 49.5], [-96.03, 50.03], [-95.68, 50.18], [-95.53, 50.53], [-95.0, 50.75], [-94.47, 50.53], [-94.25, 50.0], [-94.35, 49.75], [-94.3, 49.62], [-94.0, 49.75], [-93.47, 49.53], [-93.32, 49.18], [-93.25, 49.15], [-93.0, 49.25], [-92.47, 49.03], [-92.25, 48.5], [-92.35, 48.25], [-92.25, 48.0], [-92.35, 47.75], [-92.25, 47.5], [-92.47, 46.97], [-92.82, 46.82], [-92.85, 46.75], [-92.75, 46.5], [-92.97, 45.97], [-93.5, 45.75], [-93.75, 45.85], [-93.82, 45.82], [-93.97, 45.47], [-94.5, 45.25], [-94.75, 45.35], [-95.0, 45.25], [-95.53, 45.47], [-95.68, 45.82], [-96.03, 45.97], [-96.18, 46.32], [-96.53, 46.47], [-96.75, 47.0], [-96.65, 47.25], [-96.75, 47.5], [-96.65, 47.75], [-96.75, 48.0]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "C.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.75, 47.5], [-96.64999999999998, 47.75], [-96.75, 48.0], [-96.64999999999998, 48.25], [-96.75, 48.5], [-96.52999999999997, 49.03], [-96.18, 49.18], [-96.14999999999998, 49.25], [-96.25, 49.5], [-96.02999999999997, 50.03], [-95.68, 50.18], [-95.52999999999997, 50.53], [-95.0, 50.75], [-94.47000000000003, 50.53], [-94.25, 50.0], [-94.35000000000002, 49.75], [-94.30000000000001, 49.62], [-94.0, 49.75], [-93.47000000000003, 49.53], [-93.32, 49.18], [-93.25, 49.15], [-93.0, 49.25], [-92.47000000000003, 49.03], [-92.25, 48.5], [-92.35000000000002, 48.25], [-92.25, 48.0], [-92.35000000000002, 47.75], [-92.25, 47.5], [-92.47000000000003, 46.97], [-92.82, 46.82], [-92.85000000000002, 46.75], [-92.75, 46.5], [-92.97000000000003, 45.97], [-93.5, 45.75], [-93.75, 45.85], [-93.82, 45.82], [-93.97000000000003, 45.47], [-94.5, 45.25], [-94.75, 45.35], [-95.0, 45.25], [-95.52999999999997, 45.47], [-95.68, 45.82], [-96.02999999999997, 45.97], [-96.18, 46.32], [-96.52999999999997, 46.47], [-96.75, 47.0], [-96.64999999999998, 47.25], [-96.75, 47.5]]]]}, "2025-05-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.75, 47.5], [-96.64999999999998, 47.75], [-96.75, 48.0], [-96.64999999999998, 48.25], [-96.75, 48.5], [-96.52999999999997, 49.03], [-96.18, 49.18], [-96.14999999999998, 49.25], [-96.25, 49.5], [-96.02999999999997, 50.03], [-95.68, 50.18], [-95.52999999999997, 50.53], [-95.0, 50.75], [-94.47000000000003, 50.53], [-94.25, 50.0], [-94.35000000000002, 49.75], [-94.30000000000001, 49.62], [-94.0, 49.75], [-93.47000000000003, 49.53], [-93.32, 49.18], [-93.25, 49.15], [-93.0, 49.25], [-92.47000000000003, 49.03], [-92.25, 48.5], [-92.35000000000002, 48.25], [-92.25, 48.0], [-92.35000000000002, 47.75], [-92.25, 47.5], [-92.47000000000003, 46.97], [-92.82, 46.82], [-92.85000000000002, 46.75], [-92.75, 46.5], [-92.97000000000003, 45.97], [-93.5, 45.75], [-93.75, 45.85], [-93.82, 45.82], [-93.97000000000003, 45.47], [-94.5, 45.25], [-94.75, 45.35], [-95.0, 45.25], [-95.52999999999997, 45.47], [-95.68, 45.82], [-96.02999999999997, 45.97], [-96.18, 46.32], [-96.52999999999997, 46.47], [-96.75, 47.0], [-96.64999999999998, 47.25], [-96.75, 47.5]]]]}, "2025-05-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-96.75, 47.5], [-96.64999999999998, 47.75], [-96.75, 48.0], [-96.64999999999998, 48.25], [-96.75, 48.5], [-96.52999999999997, 49.03], [-96.18, 49.18], [-96.14999999999998, 49.25], [-96.25, 49.5], [-96.02999999999997, 50.03], [-95.68, 50.18], [-95.52999999999997, 50.53], [-95.0, 50.75], [-94.47000000000003, 50.53], [-94.25, 50.0], [-94.35000000000002, 49.75], [-94.30000000000001, 49.62], [-94.0, 49.75], [-93.47000000000003, 49.53], [-93.32, 49.18], [-93.25, 49.15], [-93.0, 49.25], [-92.47000000000003, 49.03], [-92.25, 48.5], [-92.35000000000002, 48.25], [-92.25, 48.0], [-92.35000000000002, 47.75], [-92.25, 47.5], [-92.47000000000003, 46.97], [-92.82, 46.82], [-92.85000000000002, 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"anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.048779967069331, 8.88311082533502, 6.959360624647038]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.862985369312241, 12.903057806455365, 8.06405628533247]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.6039285910857093, 2.010117077783071, 1.6039743239547848]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8717364763092805, 2.6630965092337675, 1.8363717069269503]}}