{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:58:14.645839", "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-Dec-28_to_2025-Dec-30_227.5_53.5"}, "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": 2025120002463}, "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": "December 28 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 30 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": 227268.28804536545}, "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.Pacific-Ocean", "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": ["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": 53.5}, "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": 227.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "227.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 223.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 230.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-12-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-137.15, 54.75], [-137.25, 55.0], [-137.03, 55.53], [-136.68, 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[-134.82, 49.82], [-134.97, 49.47], [-135.32, 49.32], [-135.47, 48.97], [-136.0, 48.75], [-136.53, 48.97], [-136.75, 49.5], [-136.65, 49.75], [-136.75, 50.0], [-136.53, 50.53], [-136.18, 50.68], [-136.15, 50.75], [-136.18, 50.82], [-136.53, 50.97], [-136.75, 51.5], [-136.65, 51.75], [-136.75, 52.0], [-136.65, 52.25], [-136.75, 52.5], [-136.65, 52.75], [-136.75, 53.0], [-136.65, 53.25], [-136.68, 53.32], [-137.03, 53.47], [-137.25, 54.0], [-137.15, 54.25], [-137.25, 54.5], [-137.15, 54.75]]]]}, "2025-12-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-137.15, 54.75], [-137.25, 55.0], [-137.03, 55.53], [-136.68, 55.68], [-136.53, 56.03], [-136.0, 56.25], [-135.75, 56.15], [-135.68, 56.18], [-135.65, 56.25], [-135.75, 56.5], [-135.53, 57.03], [-135.0, 57.25], [-134.75, 57.15], [-134.5, 57.25], [-133.97, 57.03], [-133.82, 56.68], [-133.47, 56.53], [-133.32, 56.18], [-132.97, 56.03], [-132.82, 55.68], [-132.75, 55.65], [-132.5, 55.75], [-131.97, 55.53], [-131.82, 55.18], [-131.47, 55.03], [-131.25, 54.5], [-131.35, 54.25], [-131.3, 54.13], [-131.0, 54.25], [-130.47, 54.03], [-130.32, 53.68], [-129.97, 53.53], [-129.82, 53.18], [-129.47, 53.03], [-129.25, 52.5], [-129.35, 52.25], [-129.25, 52.0], [-129.35, 51.75], [-129.25, 51.5], [-129.47, 50.97], [-129.82, 50.82], [-129.97, 50.47], [-130.5, 50.25], [-130.75, 50.35], [-131.0, 50.25], [-131.25, 50.35], [-131.5, 50.25], [-131.75, 50.35], [-132.0, 50.25], [-132.25, 50.35], [-132.32, 50.32], [-132.47, 49.97], [-133.0, 49.75], [-133.25, 49.85], [-133.32, 49.82], [-133.47, 49.47], [-134.0, 49.25], [-134.53, 49.47], [-134.68, 49.82], [-134.75, 49.85], [-134.82, 49.82], [-134.97, 49.47], [-135.32, 49.32], [-135.47, 48.97], [-136.0, 48.75], [-136.53, 48.97], [-136.75, 49.5], [-136.65, 49.75], [-136.75, 50.0], [-136.53, 50.53], [-136.18, 50.68], [-136.15, 50.75], [-136.18, 50.82], [-136.53, 50.97], [-136.75, 51.5], [-136.65, 51.75], [-136.75, 52.0], [-136.65, 52.25], [-136.75, 52.5], [-136.65, 52.75], [-136.75, 53.0], [-136.65, 53.25], [-136.68, 53.32], [-137.03, 53.47], [-137.25, 54.0], [-137.15, 54.25], [-137.25, 54.5], [-137.15, 54.75]]]]}, "2025-12-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-137.15, 54.75], [-137.25, 55.0], [-137.03, 55.53], [-136.68, 55.68], [-136.53, 56.03], [-136.0, 56.25], [-135.75, 56.15], [-135.68, 56.18], [-135.65, 56.25], [-135.75, 56.5], [-135.53, 57.03], [-135.0, 57.25], [-134.75, 57.15], [-134.5, 57.25], [-133.97, 57.03], [-133.82, 56.68], [-133.47, 56.53], [-133.32, 56.18], [-132.97, 56.03], [-132.82, 55.68], [-132.75, 55.65], [-132.5, 55.75], [-131.97, 55.53], [-131.82, 55.18], [-131.47, 55.03], [-131.25, 54.5], [-131.35, 54.25], [-131.3, 54.13], [-131.0, 54.25], [-130.47, 54.03], [-130.32, 53.68], [-129.97, 53.53], [-129.82, 53.18], [-129.47, 53.03], [-129.25, 52.5], [-129.35, 52.25], [-129.25, 52.0], [-129.35, 51.75], [-129.25, 51.5], [-129.47, 50.97], [-129.82, 50.82], [-129.97, 50.47], [-130.5, 50.25], [-130.75, 50.35], [-131.0, 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over entire duration", "value": 3.133706015532014}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.778783249985338, 9.438955655124062, 8.915874964813042]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.397710418701195, 10.26142272949221, 10.040720876057946]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [2.821374414425879, 3.522038574432224, 3.0577050577379317]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.459386336717614, 5.845756078715851, 6.004499529039379]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2564202622148453, 1.5451719747205785, 1.3206679713362441]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.525599698484235, 1.8686723811687973, 1.867909859244354]}}