{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:08:24.769060", "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-Oct-05_to_2025-Oct-09_198.5_64.5"}, "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": 2025100001257}, "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": "October 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "October 09 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": 61494.802521224105}, "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": 64.5}, "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": 198.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "198.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 197.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 201.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 62.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 67.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-163.0, 67.75], [-162.47, 67.53], [-162.32, 67.18], [-162.25, 67.15], [-162.0, 67.25], [-161.47, 67.03], [-161.32, 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{"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-10-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.53, 67.03], [-162.0, 67.25], [-161.47, 67.03], [-161.25, 66.5], [-161.35, 66.25], [-161.32, 66.18], [-161.25, 66.15], [-161.0, 66.25], [-160.75, 66.15], [-160.5, 66.25], [-159.97, 66.03], [-159.82, 65.68], [-159.75, 65.65], [-159.5, 65.75], [-159.25, 65.65], [-159.0, 65.75], [-158.47, 65.53], [-158.32, 65.18], [-157.97, 65.03], [-157.75, 64.5], [-157.85, 64.25], [-157.75, 64.0], [-157.97, 63.47], [-158.32, 63.32], [-158.35, 63.25], [-158.25, 63.0], [-158.47, 62.47], [-159.0, 62.25], [-159.25, 62.35], [-159.5, 62.25], [-159.75, 62.35], [-160.0, 62.25], [-160.53, 62.47], [-160.68, 62.82], [-161.03, 62.97], [-161.18, 63.32], [-161.25, 63.35], [-161.5, 63.25], [-162.03, 63.47], [-162.18, 63.82], [-162.53, 63.97], [-162.75, 64.5], [-162.65, 64.75], [-162.75, 65.0], [-162.62, 65.3], [-163.03, 65.47], [-163.25, 66.0], [-163.03, 66.53], [-162.68, 66.68], [-162.53, 67.03]]]]}, "2025-10-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-162.53, 67.03], [-162.0, 67.25], [-161.47, 67.03], [-161.25, 66.5], [-161.35, 66.25], [-161.32, 66.18], [-161.25, 66.15], [-161.0, 66.25], [-160.75, 66.15], [-160.5, 66.25], [-159.97, 66.03], [-159.82, 65.68], [-159.75, 65.65], [-159.5, 65.75], [-159.25, 65.65], [-159.0, 65.75], [-158.47, 65.53], [-158.32, 65.18], [-157.97, 65.03], [-157.75, 64.5], [-157.85, 64.25], [-157.75, 64.0], [-157.97, 63.47], [-158.32, 63.32], [-158.35, 63.25], [-158.25, 63.0], [-158.47, 62.47], [-159.0, 62.25], [-159.25, 62.35], [-159.5, 62.25], [-159.75, 62.35], [-160.0, 62.25], [-160.53, 62.47], [-160.68, 62.82], [-161.03, 62.97], [-161.18, 63.32], [-161.25, 63.35], [-161.5, 63.25], [-162.03, 63.47], [-162.18, 63.82], [-162.53, 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entire duration", "value": 8.304608642508981}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.2873451567733225}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [6.526983419090811, 5.59654700539329, 5.590175164264167, 7.709139262766087, 5.210066041492325]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [8.917137400309286, 7.532234446207724, 7.47445958455404, 9.674554443359398, 6.982912953694665]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [5.225492158974439, 4.550307192781023, 4.601929565771255, 7.100404980338415, 4.55853850080787]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.823154290244929, 5.25021476984557, 5.129841460929697, 8.304608642508981, 5.555109805024472]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.6713278825501021, 1.4343902927511503, 1.475853447242421, 2.24394029881449, 1.4686454577474153]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9210480295706067, 1.6115270047717303, 1.8258599646748084, 2.6050193267471946, 1.8788945148492597]}}