{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:03:08.700253", "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-Jan-05_to_2025-Jan-12_237.5_38.5"}, "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": 2025010001286}, "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": "January 05 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "January 12 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 8}, "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": 73483.65848500999}, "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": ["Pacific Ocean"]}, "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": 38.5}, "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": 237.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "237.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 235.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 239.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 38.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 41.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-121.47, 37.97], [-122.0, 37.75], [-122.25, 37.85], [-122.5, 37.75], [-122.75, 37.85], [-123.0, 37.75], [-123.53, 37.97], [-123.68, 38.32], [-124.03, 38.47], [-124.18, 38.82], [-124.25, 38.85], [-124.5, 38.75], [-125.03, 38.97], [-125.25, 39.5], [-125.15, 39.75], [-125.25, 40.0], [-125.03, 40.53], [-124.68, 40.68], [-124.53, 41.03], [-124.18, 41.18], [-124.15, 41.25], [-124.25, 41.5], [-124.03, 42.03], [-123.5, 42.25], [-123.25, 42.15], [-123.0, 42.25], [-122.47, 42.03], [-122.32, 41.68], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.32, 40.68], [-120.97, 40.53], [-120.82, 40.18], [-120.47, 40.03], [-120.25, 39.5], [-120.47, 38.97], [-121.0, 38.75], [-121.25, 38.85], [-121.32, 38.82], [-121.35, 38.75], [-121.25, 38.5], [-121.47, 37.97]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["W.North-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-01-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.25, 41.0], [-124.15, 41.25], [-124.25, 41.5], [-124.03, 42.03], [-123.5, 42.25], [-122.97, 42.03], [-122.75, 41.5], [-122.85, 41.25], [-122.75, 41.0], [-122.85, 40.75], [-122.75, 40.5], [-122.97, 39.97], [-123.5, 39.75], [-124.03, 39.97], [-124.25, 40.5], [-124.15, 40.75], [-124.25, 41.0]]]]}, "2025-01-06T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.53, 39.97], [-124.75, 40.5], [-124.53, 41.03], [-124.18, 41.18], [-124.15, 41.25], [-124.25, 41.5], [-124.03, 42.03], [-123.5, 42.25], [-122.97, 42.03], [-122.80000000000001, 41.63], [-122.5, 41.75], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.25, 40.5], [-121.47, 39.97], [-122.0, 39.75], [-122.25, 39.85], [-122.32, 39.82], [-122.35, 39.75], [-122.25, 39.5], [-122.35, 39.25], [-122.25, 39.0], [-122.35, 38.75], [-122.25, 38.5], [-122.47, 37.97], [-123.0, 37.75], [-123.53, 37.97], [-123.75, 38.5], [-123.65, 38.75], [-123.75, 39.0], [-123.65, 39.25], [-123.68, 39.32], [-124.03, 39.47], [-124.18, 39.82], [-124.53, 39.97]]]]}, "2025-01-07T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-124.53, 39.97], [-124.75, 40.5], [-124.53, 41.03], [-124.18, 41.18], [-124.15, 41.25], [-124.25, 41.5], [-124.03, 42.03], [-123.5, 42.25], [-122.97, 42.03], [-122.80000000000001, 41.63], [-122.5, 41.75], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.32, 40.68], [-120.97, 40.53], [-120.82, 40.18], [-120.47, 40.03], [-120.25, 39.5], [-120.47, 38.97], [-121.0, 38.75], [-121.25, 38.85], [-121.32, 38.82], [-121.35, 38.75], [-121.25, 38.5], [-121.47, 37.97], [-122.0, 37.75], [-122.25, 37.85], [-122.5, 37.75], [-122.75, 37.85], [-123.0, 37.75], [-123.53, 37.97], [-123.75, 38.5], [-123.65, 38.75], [-123.75, 39.0], [-123.65, 39.25], [-123.68, 39.32], [-124.03, 39.47], [-124.18, 39.82], [-124.53, 39.97]]]]}, "2025-01-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 40.0], [-125.03, 40.53], [-124.68, 40.68], [-124.53, 41.03], [-124.18, 41.18], [-124.15, 41.25], [-124.25, 41.5], [-124.03, 42.03], [-123.5, 42.25], [-123.25, 42.15], [-123.0, 42.25], [-122.47, 42.03], [-122.32, 41.68], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.32, 40.68], [-120.97, 40.53], [-120.82, 40.18], [-120.47, 40.03], [-120.25, 39.5], [-120.47, 38.97], [-121.0, 38.75], [-121.25, 38.85], [-121.32, 38.82], [-121.35, 38.75], [-121.25, 38.5], [-121.47, 37.97], [-122.0, 37.75], [-122.25, 37.85], [-122.5, 37.75], [-122.75, 37.85], [-123.0, 37.75], [-123.53, 37.97], [-123.68, 38.32], [-124.03, 38.47], [-124.18, 38.82], [-124.25, 38.85], [-124.5, 38.75], [-125.03, 38.97], [-125.25, 39.5], [-125.15, 39.75], [-125.25, 40.0]]]]}, "2025-01-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 40.0], [-125.03, 40.53], [-124.68, 40.68], [-124.53, 41.03], [-124.18, 41.18], [-124.15, 41.25], [-124.25, 41.5], [-124.03, 42.03], [-123.5, 42.25], [-123.25, 42.15], [-123.0, 42.25], [-122.47, 42.03], [-122.32, 41.68], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.32, 40.68], [-120.97, 40.53], [-120.82, 40.18], [-120.47, 40.03], [-120.25, 39.5], [-120.47, 38.97], [-121.0, 38.75], [-121.25, 38.85], [-121.32, 38.82], [-121.35, 38.75], [-121.25, 38.5], [-121.47, 37.97], [-122.0, 37.75], [-122.25, 37.85], [-122.5, 37.75], [-123.03, 37.97], [-123.18, 38.32], [-123.25, 38.35], [-123.5, 38.25], [-124.03, 38.47], [-124.18, 38.82], [-124.25, 38.85], [-124.5, 38.75], [-125.03, 38.97], [-125.25, 39.5], [-125.15, 39.75], [-125.25, 40.0]]]]}, "2025-01-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.25, 40.0], [-125.03, 40.53], [-124.68, 40.68], [-124.53, 41.03], [-124.18, 41.18], [-124.15, 41.25], [-124.25, 41.5], [-124.03, 42.03], [-123.5, 42.25], [-123.25, 42.15], [-123.0, 42.25], [-122.47, 42.03], [-122.32, 41.68], [-122.25, 41.65], [-122.0, 41.75], [-121.47, 41.53], [-121.25, 41.0], [-121.35, 40.75], [-121.32, 40.68], [-120.97, 40.53], [-120.82, 40.18], [-120.47, 40.03], [-120.25, 39.5], [-120.47, 38.97], [-121.0, 38.75], [-121.25, 38.85], [-121.32, 38.82], [-121.35, 38.75], [-121.25, 38.5], [-121.47, 37.97], [-122.0, 37.75], [-122.25, 37.85], [-122.5, 37.75], [-123.03, 37.97], [-123.18, 38.32], [-123.25, 38.35], [-123.5, 38.25], [-124.03, 38.47], [-124.18, 38.82], [-124.25, 38.85], [-124.5, 38.75], [-125.03, 38.97], [-125.25, 39.5], [-125.15, 39.75], [-125.25, 40.0]]]]}, "2025-01-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-123.25, 39.0], [-123.03, 39.53], [-122.5, 39.75], [-121.97, 39.53], [-121.82, 39.18], [-121.47, 39.03], [-121.25, 38.5], [-121.47, 37.97], [-122.0, 37.75], [-122.25, 37.85], [-122.5, 37.75], [-123.03, 37.97], [-123.25, 38.5], [-123.15, 38.75], [-123.25, 39.0]]]]}, "2025-01-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.5, 37.75], [-123.03, 37.97], [-123.25, 38.5], [-123.03, 39.03], [-122.5, 39.25], [-122.25, 39.15], [-122.0, 39.25], [-121.47, 39.03], [-121.25, 38.5], [-121.47, 37.97], [-122.0, 37.75], [-122.25, 37.85], [-122.5, 37.75]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.190521697541328}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.179019294761751}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [5.5608476426866105, 8.692179616292321, 9.670864525394165, 10.15197639875521, 10.442261166042726, 10.247352684868758, 11.892027367485923, 12.995755767822288]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.173369344075525, 11.611857350667321, 14.323926544189476, 15.262209828694665, 14.415769195556663, 13.644979095459007, 12.71806360880538, 13.664945220947288]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.3414882400825263, 4.301862880035112, 4.247105727553043, 4.1405054304951285, 4.403480034041957, 4.0644885065679075, 3.3226304628647085, 4.02501568045011]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [3.36619618409037, 5.910619107640002, 5.541337390624221, 6.534160458405779, 7.094549946963127, 7.190521697541328, 3.3777443509108025, 4.31846848656329]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.280327458567088, 1.7261149917615783, 1.7648700764732812, 1.822344003643224, 1.89945279542091, 1.6795844007042626, 1.2984615504030164, 1.5753535957495552]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3397925984265904, 2.259089079986308, 2.5323883690938294, 3.096922766097864, 2.842893125644895, 2.5770923649532493, 1.3922517651237658, 1.6443511885902462]}}