{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:56:50.487345", "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-Aug-31_to_2025-Sep-03_312.5_76.5"}, "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": 2025080002994}, "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": "August 31 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 03 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": 115825.66330876522}, "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": ["Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": 76.5}, "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": 312.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "312.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 307.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 321.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 72.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 78.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-08-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-48.53, 74.03], [-48.18, 74.18], [-48.15, 74.25], [-48.25, 74.5], [-48.03, 75.03], [-47.68, 75.18], [-47.65, 75.25], [-47.75, 75.5], [-47.53, 76.03], [-47.0, 76.25], [-46.75, 76.15], [-46.5, 76.25], [-46.25, 76.15], [-46.0, 76.25], [-45.75, 76.15], [-45.5, 76.25], [-45.25, 76.15], [-45.0, 76.25], [-44.47, 76.03], [-44.32, 75.68], [-44.25, 75.65], [-44.0, 75.75], [-43.75, 75.65], [-43.5, 75.75], [-43.25, 75.65], [-43.0, 75.75], [-42.75, 75.65], [-42.5, 75.75], [-42.0, 75.54], [-41.5, 75.75], [-40.97, 75.53], [-40.82, 75.18], [-40.75, 75.15], [-40.5, 75.25], [-40.25, 75.15], [-40.0, 75.25], [-39.75, 75.15], [-39.5, 75.25], [-39.25, 75.15], [-39.0, 75.25], [-38.47, 75.03], [-38.25, 74.5], [-38.47, 73.97], [-38.82, 73.82], [-38.97, 73.47], [-39.37, 73.3], [-39.32, 73.18], [-38.97, 73.03], [-38.75, 72.5], [-38.97, 71.97], [-39.5, 71.75], [-39.75, 71.85], [-40.0, 71.75], [-40.25, 71.85], [-40.5, 71.75], [-40.75, 71.85], [-41.0, 71.75], [-41.25, 71.85], [-41.5, 71.75], [-41.75, 71.85], [-42.0, 71.75], [-42.53, 71.97], [-42.68, 72.32], [-42.75, 72.35], [-43.0, 72.25], [-43.25, 72.35], [-43.5, 72.25], [-43.75, 72.35], [-44.0, 72.25], [-44.25, 72.35], [-44.5, 72.25], [-44.75, 72.35], [-45.0, 72.25], [-45.25, 72.35], [-45.32, 72.32], [-45.47, 71.97], [-46.0, 71.75], [-46.25, 71.85], [-46.5, 71.75], [-47.03, 71.97], [-47.18, 72.32], [-47.25, 72.35], [-47.5, 72.25], [-47.75, 72.35], [-48.0, 72.25], [-48.53, 72.47], [-48.75, 73.0], [-48.65, 73.25], [-48.75, 73.5], [-48.53, 74.03]]]]}, "2025-09-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.65, 76.75], [-52.75, 77.0], [-52.53, 77.53], [-52.18, 77.68], [-52.03, 78.03], [-51.5, 78.25], [-51.25, 78.15], [-51.0, 78.25], [-50.75, 78.15], [-50.5, 78.25], [-50.25, 78.15], [-50.0, 78.25], [-49.75, 78.15], [-49.5, 78.25], [-49.25, 78.15], [-49.0, 78.25], [-48.75, 78.15], [-48.5, 78.25], [-48.25, 78.15], [-48.18, 78.18], [-48.03, 78.53], [-47.5, 78.75], [-47.25, 78.65], [-47.0, 78.75], [-46.75, 78.65], [-46.5, 78.75], [-46.25, 78.65], [-46.0, 78.75], [-45.75, 78.65], [-45.5, 78.75], [-44.97, 78.53], [-44.82, 78.18], [-44.75, 78.15], [-44.5, 78.25], [-43.97, 78.03], [-43.75, 77.5], [-43.97, 76.97], [-44.5, 76.75], [-44.75, 76.85], [-45.0, 76.75], [-45.25, 76.85], [-45.32, 76.82], [-45.47, 76.47], [-46.0, 76.25], [-45.75, 76.15], [-45.5, 76.25], [-45.25, 76.15], [-45.0, 76.25], [-44.47, 76.03], [-44.32, 75.68], [-44.25, 75.65], [-44.0, 75.75], [-43.75, 75.65], [-43.5, 75.75], [-43.25, 75.65], [-43.0, 75.75], [-42.75, 75.65], [-42.5, 75.75], [-42.0, 75.54], [-41.5, 75.75], [-40.97, 75.53], [-40.82, 75.18], [-40.75, 75.15], [-40.5, 75.25], [-40.25, 75.15], [-40.0, 75.25], [-39.75, 75.15], [-39.5, 75.25], [-39.25, 75.15], [-39.0, 75.25], [-38.47, 75.03], [-38.25, 74.5], [-38.47, 73.97], [-38.82, 73.82], [-38.97, 73.47], [-39.37, 73.3], [-39.32, 73.18], [-38.97, 73.03], [-38.75, 72.5], [-38.97, 71.97], [-39.5, 71.75], [-39.75, 71.85], [-40.0, 71.75], [-40.25, 71.85], [-40.5, 71.75], [-40.75, 71.85], [-41.0, 71.75], [-41.25, 71.85], [-41.5, 71.75], [-41.75, 71.85], [-42.0, 71.75], [-42.53, 71.97], [-42.68, 72.32], [-42.75, 72.35], [-43.0, 72.25], [-43.25, 72.35], [-43.5, 72.25], [-43.75, 72.35], [-44.0, 72.25], [-44.25, 72.35], [-44.5, 72.25], [-44.75, 72.35], [-45.0, 72.25], [-45.25, 72.35], [-45.32, 72.32], [-45.47, 71.97], [-46.0, 71.75], [-46.25, 71.85], [-46.5, 71.75], [-47.03, 71.97], [-47.18, 72.32], [-47.25, 72.35], [-47.5, 72.25], [-47.75, 72.35], [-48.0, 72.25], [-48.53, 72.47], [-48.75, 73.0], [-48.65, 73.25], [-48.75, 73.5], [-48.53, 74.03], [-48.18, 74.18], [-48.15, 74.25], [-48.25, 74.5], [-48.03, 75.03], [-47.68, 75.18], [-47.65, 75.25], [-47.68, 75.32], [-47.75, 75.35], [-48.0, 75.25], [-48.25, 75.35], [-48.5, 75.25], [-48.75, 75.35], [-49.0, 75.25], [-49.25, 75.35], [-49.5, 75.25], [-49.75, 75.35], [-50.0, 75.25], [-50.25, 75.35], [-50.5, 75.25], [-51.0, 75.46], [-51.5, 75.25], [-51.75, 75.35], [-52.0, 75.25], [-52.53, 75.47], [-52.75, 76.0], [-52.65, 76.25], [-52.75, 76.5], [-52.65, 76.75]], [[-46.25, 76.35], [-46.32, 76.32], [-46.37, 76.2], [-46.25, 76.15], [-46.0, 76.25], [-46.25, 76.35]]]]}, "2025-09-02T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.65, 76.75], [-52.75, 77.0], [-52.53, 77.53], [-52.18, 77.68], [-52.03, 78.03], [-51.5, 78.25], [-51.25, 78.15], [-51.0, 78.25], [-50.75, 78.15], [-50.5, 78.25], [-50.25, 78.15], [-50.0, 78.25], [-49.75, 78.15], [-49.5, 78.25], [-49.25, 78.15], [-49.0, 78.25], [-48.75, 78.15], [-48.5, 78.25], [-48.25, 78.15], [-48.18, 78.18], [-48.03, 78.53], [-47.5, 78.75], [-47.25, 78.65], [-47.0, 78.75], [-46.75, 78.65], [-46.5, 78.75], [-46.25, 78.65], [-46.0, 78.75], [-45.75, 78.65], [-45.5, 78.75], [-44.97, 78.53], [-44.82, 78.18], [-44.75, 78.15], [-44.5, 78.25], [-43.97, 78.03], [-43.75, 77.5], [-43.97, 76.97], [-44.5, 76.75], [-44.75, 76.85], [-45.0, 76.75], [-45.25, 76.85], [-45.32, 76.82], [-45.47, 76.47], [-46.0, 76.25], [-45.75, 76.15], [-45.5, 76.25], [-45.25, 76.15], [-45.0, 76.25], [-44.47, 76.03], [-44.32, 75.68], [-44.25, 75.65], [-44.0, 75.75], [-43.75, 75.65], [-43.5, 75.75], [-43.25, 75.65], [-43.0, 75.75], [-42.75, 75.65], [-42.5, 75.75], [-42.0, 75.54], [-41.5, 75.75], [-40.97, 75.53], [-40.82, 75.18], [-40.75, 75.15], [-40.5, 75.25], [-40.25, 75.15], [-40.0, 75.25], [-39.75, 75.15], [-39.5, 75.25], [-39.25, 75.15], [-39.0, 75.25], [-38.47, 75.03], [-38.25, 74.5], [-38.47, 73.97], [-38.82, 73.82], [-38.97, 73.47], [-39.37, 73.3], [-39.32, 73.18], [-38.97, 73.03], [-38.75, 72.5], [-38.97, 71.97], [-39.5, 71.75], [-39.75, 71.85], [-40.0, 71.75], [-40.25, 71.85], [-40.5, 71.75], [-40.75, 71.85], [-41.0, 71.75], [-41.25, 71.85], [-41.5, 71.75], [-41.75, 71.85], [-42.0, 71.75], [-42.53, 71.97], [-42.68, 72.32], [-42.75, 72.35], [-43.0, 72.25], [-43.25, 72.35], [-43.5, 72.25], [-43.75, 72.35], [-44.0, 72.25], [-44.25, 72.35], [-44.5, 72.25], [-44.75, 72.35], [-45.0, 72.25], [-45.25, 72.35], [-45.32, 72.32], [-45.47, 71.97], [-46.0, 71.75], [-46.25, 71.85], [-46.5, 71.75], [-47.03, 71.97], [-47.18, 72.32], [-47.25, 72.35], [-47.5, 72.25], [-47.75, 72.35], [-48.0, 72.25], [-48.53, 72.47], [-48.75, 73.0], [-48.65, 73.25], [-48.75, 73.5], [-48.53, 74.03], [-48.18, 74.18], [-48.15, 74.25], [-48.25, 74.5], [-48.03, 75.03], [-47.68, 75.18], [-47.65, 75.25], [-47.68, 75.32], [-47.75, 75.35], [-48.0, 75.25], [-48.25, 75.35], [-48.5, 75.25], [-48.75, 75.35], [-49.0, 75.25], [-49.25, 75.35], [-49.5, 75.25], [-49.75, 75.35], [-50.0, 75.25], [-50.25, 75.35], [-50.5, 75.25], [-51.0, 75.46], [-51.5, 75.25], [-51.75, 75.35], [-52.0, 75.25], [-52.53, 75.47], [-52.75, 76.0], [-52.65, 76.25], [-52.75, 76.5], [-52.65, 76.75]], [[-46.25, 76.35], [-46.32, 76.32], [-46.37, 76.2], [-46.25, 76.15], [-46.0, 76.25], [-46.25, 76.35]]]]}, "2025-09-03T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-52.65, 76.75], [-52.75, 77.0], [-52.53, 77.53], [-52.18, 77.68], [-52.03, 78.03], [-51.5, 78.25], [-51.25, 78.15], [-51.0, 78.25], [-50.75, 78.15], [-50.5, 78.25], [-50.25, 78.15], [-50.0, 78.25], [-49.75, 78.15], [-49.5, 78.25], [-49.25, 78.15], [-49.0, 78.25], [-48.75, 78.15], [-48.5, 78.25], [-48.25, 78.15], [-48.18, 78.18], [-48.03, 78.53], [-47.5, 78.75], [-47.25, 78.65], [-47.0, 78.75], [-46.75, 78.65], [-46.5, 78.75], [-46.25, 78.65], [-46.0, 78.75], [-45.75, 78.65], [-45.5, 78.75], [-44.97, 78.53], [-44.82, 78.18], [-44.75, 78.15], [-44.5, 78.25], [-43.97, 78.03], [-43.75, 77.5], [-43.97, 76.97], [-44.5, 76.75], [-44.75, 76.85], [-45.0, 76.75], [-45.25, 76.85], [-45.32, 76.82], [-45.47, 76.47], [-46.0, 76.25], [-46.25, 76.35], [-46.32, 76.32], [-46.47, 75.97], [-46.82, 75.82], [-46.97, 75.47], [-47.5, 75.25], [-47.75, 75.35], [-48.0, 75.25], [-48.25, 75.35], [-48.5, 75.25], [-48.75, 75.35], [-49.0, 75.25], [-49.25, 75.35], [-49.5, 75.25], [-49.75, 75.35], [-50.0, 75.25], [-50.25, 75.35], [-50.5, 75.25], [-51.0, 75.46], [-51.5, 75.25], [-51.75, 75.35], [-52.0, 75.25], [-52.53, 75.47], [-52.75, 76.0], [-52.65, 76.25], [-52.75, 76.5], [-52.65, 76.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.116550818416357}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 7.662725279138144}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-9.898669002367114, -9.234437552265774, -9.9253421651905, -11.110559437109998]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-7.624877675374307, -6.996777598063147, -6.575468444824196, -8.803144836425759]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.475440084899885, 8.197062832788435, 7.68924976334369, 6.453390229719697]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.191097373289125, 9.116550818416357, 8.409312506152418, 6.696483064869511]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4884713173464095, 1.6974528949236727, 1.5976902485697773, 1.4616652992493664]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.5989816239776702, 1.94875839759026, 1.980921424696109, 1.522340813420582]}}