{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:09:02.778686", "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-Nov-20_to_2025-Nov-24_242.0_50.5"}, "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": 2025110002121}, "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": "November 20 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 24 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": 95936.21588950208}, "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"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 50.5}, "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": 242.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "242.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 238.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 243.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 49.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 52.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-117.47, 48.47], [-118.0, 48.25], [-118.53, 48.47], [-118.68, 48.82], [-119.03, 48.97], [-119.2, 49.38], [-119.32, 49.32], [-119.47, 48.97], [-120.0, 48.75], [-120.53, 48.97], [-120.68, 49.32], [-120.75, 49.35], [-121.0, 49.25], [-121.25, 49.35], [-121.32, 49.32], [-121.47, 48.97], [-122.0, 48.75], [-122.53, 48.97], [-122.75, 49.5], [-122.65, 49.75], [-122.75, 50.0], [-122.65, 50.25], [-122.75, 50.5], [-122.65, 50.75], [-122.75, 51.0], [-122.53, 51.53], [-122.0, 51.75], [-121.75, 51.65], [-121.5, 51.75], [-121.25, 51.65], [-121.18, 51.68], [-121.15, 51.75], [-121.25, 52.0], [-121.03, 52.53], [-120.5, 52.75], [-120.25, 52.65], [-120.18, 52.68], [-120.03, 53.03], [-119.5, 53.25], [-118.97, 53.03], [-118.82, 52.68], [-118.75, 52.65], [-118.5, 52.75], [-117.97, 52.53], [-117.82, 52.18], [-117.75, 52.15], [-117.5, 52.25], [-116.97, 52.03], [-116.75, 51.5], [-116.85, 51.25], [-116.75, 51.0], [-116.85, 50.75], [-116.75, 50.5], [-116.85, 50.25], [-116.82, 50.18], [-116.47, 50.03], [-116.25, 49.5], [-116.47, 48.97], [-117.0, 48.75], [-117.25, 48.85], [-117.32, 48.82], [-117.47, 48.47]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-11-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-120.03999999999999, 50.5], [-120.25, 51.0], [-120.03, 51.53], [-119.5, 51.75], [-118.97, 51.53], [-118.75, 51.0], [-118.96000000000001, 50.5], [-118.80000000000001, 50.13], [-118.68, 50.18], [-118.65, 50.25], [-118.75, 50.5], [-118.53, 51.03], [-118.0, 51.25], [-117.47, 51.03], [-117.25, 50.5], [-117.35, 50.25], [-117.25, 50.0], [-117.35, 49.75], [-117.25, 49.5], [-117.47, 48.97], [-118.0, 48.75], [-118.25, 48.85], [-118.5, 48.75], [-119.03, 48.97], [-119.19999999999999, 49.38], [-119.32, 49.32], [-119.47, 48.97], [-120.0, 48.75], [-120.53, 48.97], [-120.75, 49.5], [-120.53, 50.03], [-120.18, 50.18], [-120.03999999999999, 50.5]]]]}, "2025-11-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.75, 50.0], [-122.65, 50.25], [-122.75, 50.5], [-122.65, 50.75], [-122.75, 51.0], [-122.53, 51.53], [-122.0, 51.75], [-121.75, 51.65], [-121.5, 51.75], [-121.25, 51.65], [-121.18, 51.68], [-121.15, 51.75], [-121.25, 52.0], [-121.03, 52.53], [-120.5, 52.75], [-120.25, 52.65], [-120.18, 52.68], [-120.03, 53.03], [-119.5, 53.25], [-118.97, 53.03], [-118.82, 52.68], [-118.75, 52.65], [-118.5, 52.75], [-117.97, 52.53], [-117.82, 52.18], [-117.75, 52.15], [-117.5, 52.25], [-116.97, 52.03], [-116.75, 51.5], [-116.85, 51.25], [-116.75, 51.0], [-116.85, 50.75], [-116.75, 50.5], [-116.85, 50.25], [-116.82, 50.18], [-116.47, 50.03], [-116.25, 49.5], [-116.47, 48.97], [-117.0, 48.75], [-117.25, 48.85], [-117.32, 48.82], [-117.47, 48.47], [-118.0, 48.25], [-118.53, 48.47], [-118.68, 48.82], [-119.03, 48.97], [-119.19999999999999, 49.38], [-119.32, 49.32], [-119.47, 48.97], [-120.0, 48.75], [-120.53, 48.97], [-120.68, 49.32], [-120.75, 49.35], [-121.0, 49.25], [-121.25, 49.35], [-121.32, 49.32], [-121.47, 48.97], [-122.0, 48.75], [-122.53, 48.97], [-122.75, 49.5], [-122.65, 49.75], [-122.75, 50.0]]]]}, "2025-11-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.75, 50.0], [-122.65, 50.25], [-122.75, 50.5], [-122.65, 50.75], [-122.75, 51.0], [-122.53, 51.53], [-122.0, 51.75], [-121.75, 51.65], [-121.5, 51.75], [-121.25, 51.65], [-121.18, 51.68], [-121.15, 51.75], [-121.25, 52.0], [-121.03, 52.53], [-120.5, 52.75], [-120.25, 52.65], [-120.18, 52.68], [-120.03, 53.03], [-119.5, 53.25], [-118.97, 53.03], [-118.82, 52.68], [-118.75, 52.65], [-118.5, 52.75], [-117.97, 52.53], [-117.82, 52.18], [-117.75, 52.15], [-117.5, 52.25], [-116.97, 52.03], [-116.75, 51.5], [-116.85, 51.25], [-116.75, 51.0], [-116.85, 50.75], [-116.75, 50.5], [-116.85, 50.25], [-116.82, 50.18], [-116.47, 50.03], [-116.25, 49.5], [-116.47, 48.97], [-117.0, 48.75], [-117.25, 48.85], [-117.32, 48.82], [-117.47, 48.47], [-118.0, 48.25], [-118.53, 48.47], [-118.68, 48.82], [-119.03, 48.97], [-119.19999999999999, 49.38], [-119.32, 49.32], [-119.47, 48.97], [-120.0, 48.75], [-120.53, 48.97], [-120.68, 49.32], [-120.75, 49.35], [-121.0, 49.25], [-121.25, 49.35], [-121.32, 49.32], [-121.47, 48.97], [-122.0, 48.75], [-122.53, 48.97], [-122.75, 49.5], [-122.65, 49.75], [-122.75, 50.0]]]]}, "2025-11-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-122.75, 50.0], [-122.65, 50.25], [-122.75, 50.5], [-122.65, 50.75], [-122.75, 51.0], [-122.53, 51.53], [-122.0, 51.75], [-121.75, 51.65], [-121.5, 51.75], [-121.25, 51.65], [-121.18, 51.68], [-121.15, 51.75], [-121.25, 52.0], [-121.03, 52.53], [-120.5, 52.75], [-120.25, 52.65], [-120.18, 52.68], [-120.03, 53.03], [-119.5, 53.25], [-118.97, 53.03], [-118.82, 52.68], [-118.75, 52.65], [-118.5, 52.75], [-117.97, 52.53], [-117.82, 52.18], [-117.75, 52.15], [-117.5, 52.25], [-116.97, 52.03], [-116.75, 51.5], [-116.85, 51.25], [-116.75, 51.0], [-116.85, 50.75], [-116.75, 50.5], [-116.85, 50.25], [-116.82, 50.18], [-116.47, 50.03], [-116.25, 49.5], [-116.47, 48.97], [-117.0, 48.75], [-117.25, 48.85], [-117.32, 48.82], [-117.47, 48.47], [-118.0, 48.25], [-118.53, 48.47], [-118.68, 48.82], [-119.03, 48.97], [-119.19999999999999, 49.38], [-119.32, 49.32], [-119.47, 48.97], [-120.0, 48.75], [-120.53, 48.97], [-120.68, 49.32], [-120.75, 49.35], [-121.0, 49.25], [-121.25, 49.35], [-121.32, 49.32], [-121.47, 48.97], [-122.0, 48.75], [-122.53, 48.97], [-122.75, 49.5], [-122.65, 49.75], [-122.75, 50.0]]]]}, "2025-11-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-118.53, 49.53], [-118.0, 49.75], [-117.47, 49.53], [-117.25, 49.0], [-117.47, 48.47], [-118.0, 48.25], [-118.53, 48.47], [-118.75, 49.0], [-118.53, 49.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 8.056068733169582}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 6.17781629785241}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [1.954475838797464, 1.5274614295180982, 1.88798955800587, 1.958203939840132, 2.1906778971354584]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.892126973470056, 5.701086934407556, 5.671489969889365, 5.731196339925134, 2.1906778971354584]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.026495296476136, 5.781864044566738, 6.3970205597180625, 6.691344340763207, 4.734840784438006]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [4.533345538503056, 7.371917631370252, 7.782123844712032, 8.056068733169582, 4.734840784438006]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.05002563729266, 1.196360363042053, 1.2886809218246265, 1.3436088225174712, 1.0357062078310542]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.1490891267764436, 1.6066078303109472, 1.4979003103265647, 1.5646561434829036, 1.0357062078310542]}}