{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:36:31.615562", "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": "2023-Sep-08_to_2023-Sep-11_226.5_56.0"}, "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": 2023090001115}, "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 08 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 11 2023"}, "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": 59669.04247178689}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "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": ["Gulf of Alaska", "North Pacific Ocean", "The Coastal Waters of Southeast Alaska and British Columbia"]}, "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": 56.0}, "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": 226.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "226.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 222.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 227.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-134.25, 56.0], [-134.03, 56.53], [-133.5, 56.75], [-133.25, 56.65], [-133.0, 56.75], [-132.47, 56.53], [-132.25, 56.0], [-132.47, 55.47], [-133.0, 55.25], [-133.25, 55.35], [-133.5, 55.25], [-134.03, 55.47], [-134.25, 56.0]]], [[[-137.53, 58.47], [-137.75, 59.0], [-137.53, 59.53], [-137.0, 59.75], [-136.47, 59.53], [-136.25, 59.0], [-136.47, 58.47], [-137.0, 58.25], [-137.53, 58.47]]]]}, "2023-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-138.03, 59.53], [-137.5, 59.75], [-137.25, 59.65], [-137.0, 59.75], [-136.75, 59.65], [-136.5, 59.75], [-136.25, 59.65], [-136.0, 59.75], [-135.47, 59.53], [-135.32, 59.18], [-135.25, 59.15], [-135.0, 59.25], [-134.75, 59.15], [-134.5, 59.25], [-134.25, 59.15], [-134.0, 59.25], [-133.47, 59.03], [-133.32, 58.68], [-133.25, 58.65], [-133.0, 58.75], [-132.47, 58.53], [-132.25, 58.0], [-132.35, 57.75], [-132.25, 57.5], [-132.35, 57.25], [-132.32, 57.18], [-131.97, 57.03], [-131.75, 56.5], [-131.97, 55.97], [-132.32, 55.82], [-132.47, 55.47], [-133.0, 55.25], [-133.25, 55.35], [-133.5, 55.25], [-133.75, 55.35], [-134.0, 55.25], [-134.53, 55.47], [-134.68, 55.82], [-135.03, 55.97], [-135.18, 56.32], [-135.25, 56.35], [-135.5, 56.25], [-136.03, 56.47], [-136.18, 56.82], [-136.25, 56.85], [-136.5, 56.75], [-137.03, 56.97], [-137.25, 57.5], [-137.07, 57.93], [-137.5, 57.75], [-138.03, 57.97], [-138.25, 58.5], [-138.15, 58.75], [-138.25, 59.0], [-138.03, 59.53]], [[-136.68, 58.18], [-136.62, 58.3], [-136.75, 58.35], [-136.82, 58.32], [-136.93, 58.07], [-136.68, 58.18]]]]}, "2023-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-138.03, 59.53], [-137.5, 59.75], [-137.25, 59.65], [-137.0, 59.75], [-136.75, 59.65], [-136.5, 59.75], [-136.25, 59.65], [-136.0, 59.75], [-135.47, 59.53], [-135.32, 59.18], [-135.25, 59.15], [-135.0, 59.25], [-134.75, 59.15], [-134.5, 59.25], [-134.25, 59.15], [-134.0, 59.25], [-133.47, 59.03], [-133.32, 58.68], [-133.25, 58.65], [-133.0, 58.75], [-132.47, 58.53], [-132.25, 58.0], [-132.35, 57.75], [-132.25, 57.5], [-132.35, 57.25], [-132.32, 57.18], [-131.97, 57.03], [-131.75, 56.5], [-131.97, 55.97], [-132.32, 55.82], [-132.47, 55.47], [-133.0, 55.25], [-133.25, 55.35], [-133.5, 55.25], [-133.75, 55.35], [-134.0, 55.25], [-134.53, 55.47], [-134.68, 55.82], [-135.03, 55.97], [-135.18, 56.32], [-135.25, 56.35], [-135.5, 56.25], [-136.03, 56.47], [-136.18, 56.82], [-136.25, 56.85], [-136.5, 56.75], [-137.03, 56.97], [-137.25, 57.5], [-137.07, 57.93], [-137.5, 57.75], [-138.03, 57.97], [-138.25, 58.5], [-138.15, 58.75], [-138.25, 59.0], [-138.03, 59.53]], [[-136.68, 58.18], [-136.62, 58.3], [-136.75, 58.35], [-136.82, 58.32], [-136.93, 58.07], [-136.68, 58.18]]]]}, "2023-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-138.03, 59.53], [-137.5, 59.75], [-137.25, 59.65], [-137.0, 59.75], [-136.75, 59.65], [-136.5, 59.75], [-136.25, 59.65], [-136.0, 59.75], [-135.47, 59.53], [-135.32, 59.18], [-135.25, 59.15], [-135.0, 59.25], [-134.75, 59.15], [-134.5, 59.25], [-134.25, 59.15], [-134.0, 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amplitude", "description": "Mean t2m anomaly over entire duration", "value": 2.872097323190662}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [10.335634317840288, 12.395026588188045, 12.841486999256517, 12.379934910819884]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.7930178276805, 15.628412190387621, 15.821585660700634, 15.074681094787593]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [1.960983245028558, 2.676434415569874, 3.201449605733984, 2.8143341214483035]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [2.4589512473340847, 3.562595122512903, 4.2196793238463215, 4.353599015463203]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3602300520589286, 1.8417156827573917, 2.171004815895201, 1.8107002516326507]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4293990153179315, 2.7738205839743992, 3.1651343221649912, 2.390911386621473]}}