{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:13.108492", "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-03_to_2025-May-05_257.5_52.0"}, "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": 2025050001171}, "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 03 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 05 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": 89710.21112794233}, "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": 52.0}, "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": 257.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "257.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 257.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 261.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 53.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-103.53, 54.03], [-103.0, 54.25], [-102.75, 54.15], [-102.5, 54.25], [-102.25, 54.15], [-102.0, 54.25], [-101.47, 54.03], [-101.25, 53.5], [-101.35, 53.25], [-101.32, 53.18], [-101.25, 53.15], [-101.0, 53.25], [-100.47, 53.03], [-100.32, 52.68], [-99.97, 52.53], [-99.75, 52.0], [-99.85, 51.75], [-99.82, 51.68], [-99.75, 51.65], [-99.5, 51.75], [-98.97, 51.53], [-98.82, 51.18], [-98.47, 51.03], [-98.25, 50.5], [-98.47, 49.97], [-99.0, 49.75], [-99.25, 49.85], [-99.32, 49.82], [-99.35, 49.75], [-99.32, 49.68], [-98.97, 49.53], [-98.75, 49.0], [-98.97, 48.47], [-99.5, 48.25], [-100.03, 48.47], [-100.18, 48.82], [-100.25, 48.85], [-100.32, 48.82], [-100.47, 48.47], [-100.82, 48.32], [-100.97, 47.97], [-101.5, 47.75], [-102.03, 47.97], [-102.18, 48.32], [-102.25, 48.35], [-102.5, 48.25], [-103.03, 48.47], [-103.25, 49.0], [-103.03, 49.53], [-102.68, 49.68], [-102.65, 49.75], [-102.75, 50.0], [-102.62, 50.3], [-103.03, 50.47], [-103.25, 51.0], [-103.15, 51.25], [-103.25, 51.5], [-103.15, 51.75], [-103.25, 52.0], [-103.04, 52.5], [-103.18, 52.82], [-103.53, 52.97], [-103.75, 53.5], [-103.53, 54.03]]]]}}, "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": {"2025-05-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.52999999999997, 52.97], [-103.75, 53.5], [-103.52999999999997, 54.03], [-103.0, 54.25], [-102.75, 54.15], [-102.5, 54.25], [-102.25, 54.15], [-102.0, 54.25], [-101.47000000000003, 54.03], [-101.25, 53.5], [-101.35000000000002, 53.25], [-101.32, 53.18], [-101.25, 53.15], [-101.0, 53.25], [-100.47000000000003, 53.03], [-100.32, 52.68], [-99.97000000000003, 52.53], [-99.75, 52.0], [-99.85000000000002, 51.75], [-99.82, 51.68], [-99.75, 51.65], [-99.5, 51.75], [-98.97000000000003, 51.53], [-98.82, 51.18], [-98.47000000000003, 51.03], [-98.25, 50.5], [-98.47000000000003, 49.97], [-99.0, 49.75], [-99.25, 49.85], [-99.32, 49.82], [-99.35000000000002, 49.75], [-99.32, 49.68], [-98.97000000000003, 49.53], [-98.75, 49.0], [-98.97000000000003, 48.47], [-99.5, 48.25], [-100.02999999999997, 48.47], [-100.18, 48.82], [-100.25, 48.85], [-100.32, 48.82], [-100.47000000000003, 48.47], [-100.82, 48.32], [-100.97000000000003, 47.97], [-101.5, 47.75], [-102.02999999999997, 47.97], [-102.18, 48.32], [-102.25, 48.35], [-102.5, 48.25], [-103.02999999999997, 48.47], [-103.25, 49.0], [-103.02999999999997, 49.53], [-102.68, 49.68], [-102.64999999999998, 49.75], [-102.75, 50.0], [-102.62, 50.3], [-103.02999999999997, 50.47], [-103.25, 51.0], [-103.14999999999998, 51.25], [-103.25, 51.5], [-103.14999999999998, 51.75], [-103.25, 52.0], [-103.04000000000002, 52.5], [-103.18, 52.82], [-103.52999999999997, 52.97]]]]}, "2025-05-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-103.52999999999997, 52.97], [-103.75, 53.5], [-103.52999999999997, 54.03], [-103.0, 54.25], [-102.75, 54.15], [-102.5, 54.25], [-102.25, 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anomaly over entire duration", "value": 8.453134888636445}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [14.964373469698273, 18.572351516502522, 16.039920895341538]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.63831481933596, 22.170851643880212, 19.986834462483728]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.314376502228248, 10.454499174457103, 7.590528989223995]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.969735876957373, 13.892331529307285, 10.686661268005707]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.5231554427322695, 2.1402327782443145, 1.6030937720599088]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.8824771208637228, 2.64959480653808, 2.2732800628730265]}}