{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:07:56.295555", "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-Sep-09_to_2025-Sep-13_243.5_68.5"}, "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": 2025090001612}, "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 09 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 13 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": 79542.12730583198}, "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"]}, "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": []}, "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": 68.5}, "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": 243.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "243.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 234.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 245.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 66.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 69.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-118.25, 69.15], [-118.0, 69.25], [-117.75, 69.15], [-117.5, 69.25], [-117.25, 69.15], [-117.0, 69.25], [-116.75, 69.15], [-116.5, 69.25], [-116.25, 69.15], [-116.0, 69.25], [-115.47, 69.03], [-115.32, 68.68], [-114.97, 68.53], [-114.82, 68.18], [-114.47, 68.03], [-114.25, 67.5], [-114.47, 66.97], [-115.0, 66.75], [-115.25, 66.85], [-115.5, 66.75], [-115.75, 66.85], [-115.82, 66.82], [-115.85, 66.75], [-115.75, 66.5], [-115.97, 65.97], [-116.5, 65.75], [-116.75, 65.85], [-117.0, 65.75], [-117.25, 65.85], [-117.5, 65.75], [-118.03, 65.97], [-118.18, 66.32], [-118.53, 66.47], [-118.75, 67.0], [-118.65, 67.25], [-118.68, 67.32], [-118.75, 67.35], [-119.0, 67.25], [-119.25, 67.35], [-119.5, 67.25], [-119.75, 67.35], [-120.0, 67.25], [-120.25, 67.35], [-120.5, 67.25], [-120.75, 67.35], [-121.0, 67.25], [-121.5, 67.46], [-122.0, 67.25], [-122.25, 67.35], [-122.5, 67.25], [-122.75, 67.35], [-123.0, 67.25], [-123.25, 67.35], [-123.5, 67.25], [-123.75, 67.35], [-123.82, 67.32], [-123.97, 66.97], [-124.5, 66.75], [-124.75, 66.85], [-125.0, 66.75], [-125.25, 66.85], [-125.5, 66.75], [-125.75, 66.85], [-126.0, 66.75], [-126.53, 66.97], [-126.75, 67.5], [-126.65, 67.75], [-126.75, 68.0], [-126.53, 68.53], [-126.18, 68.68], [-126.03, 69.03], [-125.5, 69.25], [-125.25, 69.15], [-125.0, 69.25], [-124.75, 69.15], [-124.5, 69.25], [-124.25, 69.15], [-124.0, 69.25], [-123.75, 69.15], [-123.68, 69.18], [-123.53, 69.53], [-123.0, 69.75], [-122.75, 69.65], [-122.68, 69.68], [-122.53, 70.03], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-120.97, 70.03], [-120.82, 69.68], [-120.75, 69.65], [-120.5, 69.75], [-120.25, 69.65], [-120.0, 69.75], [-119.75, 69.65], [-119.5, 69.75], [-118.97, 69.53], [-118.82, 69.18], [-118.75, 69.15], [-118.5, 69.25], [-118.25, 69.15]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-09-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.75, 68.0], [-126.53, 68.53], [-126.18, 68.68], [-126.03, 69.03], [-125.5, 69.25], [-125.25, 69.15], [-125.0, 69.25], [-124.75, 69.15], [-124.5, 69.25], [-124.25, 69.15], [-124.0, 69.25], [-123.75, 69.15], [-123.68, 69.18], [-123.53, 69.53], [-123.0, 69.75], [-122.75, 69.65], [-122.68, 69.68], [-122.53, 70.03], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-120.97, 70.03], [-120.82, 69.68], [-120.75, 69.65], [-120.5, 69.75], [-120.25, 69.65], [-120.0, 69.75], [-119.75, 69.65], [-119.5, 69.75], [-118.97, 69.53], [-118.82, 69.18], [-118.75, 69.15], [-118.5, 69.25], [-118.0, 69.04], [-117.5, 69.25], [-117.25, 69.15], [-117.0, 69.25], [-116.75, 69.15], [-116.5, 69.25], [-115.97, 69.03], [-115.75, 68.5], [-115.97, 67.97], [-116.5, 67.75], [-116.75, 67.85], [-117.0, 67.75], [-117.25, 67.85], [-117.5, 67.75], [-118.0, 67.96], [-118.32, 67.82], [-118.47, 67.47], [-119.0, 67.25], [-119.25, 67.35], [-119.5, 67.25], [-119.75, 67.35], [-120.0, 67.25], [-120.25, 67.35], [-120.5, 67.25], [-120.75, 67.35], [-121.0, 67.25], [-121.5, 67.46], [-122.0, 67.25], [-122.25, 67.35], [-122.5, 67.25], [-122.75, 67.35], [-123.0, 67.25], [-123.25, 67.35], [-123.5, 67.25], [-123.75, 67.35], [-123.82, 67.32], [-123.97, 66.97], [-124.5, 66.75], [-124.75, 66.85], [-125.0, 66.75], [-125.25, 66.85], [-125.5, 66.75], [-125.75, 66.85], [-126.0, 66.75], [-126.53, 66.97], [-126.75, 67.5], [-126.65, 67.75], [-126.75, 68.0]]]]}, "2025-09-10T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.75, 68.0], [-126.53, 68.53], [-126.18, 68.68], [-126.03, 69.03], [-125.5, 69.25], [-125.25, 69.15], [-125.0, 69.25], [-124.75, 69.15], [-124.5, 69.25], [-124.25, 69.15], [-124.0, 69.25], [-123.75, 69.15], [-123.68, 69.18], [-123.53, 69.53], [-123.0, 69.75], [-122.75, 69.65], [-122.68, 69.68], [-122.53, 70.03], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-120.97, 70.03], [-120.82, 69.68], [-120.75, 69.65], [-120.5, 69.75], [-120.25, 69.65], [-120.0, 69.75], [-119.75, 69.65], [-119.5, 69.75], [-118.97, 69.53], [-118.82, 69.18], [-118.75, 69.15], [-118.5, 69.25], [-118.0, 69.04], [-117.5, 69.25], [-117.25, 69.15], [-117.0, 69.25], [-116.75, 69.15], [-116.5, 69.25], [-115.97, 69.03], [-115.75, 68.5], [-115.97, 67.97], [-116.5, 67.75], [-116.75, 67.85], [-117.0, 67.75], [-117.25, 67.85], [-117.5, 67.75], [-118.0, 67.96], [-118.32, 67.82], [-118.47, 67.47], [-119.0, 67.25], [-119.25, 67.35], [-119.5, 67.25], [-119.75, 67.35], [-120.0, 67.25], [-120.25, 67.35], [-120.5, 67.25], [-120.75, 67.35], [-121.0, 67.25], [-121.5, 67.46], [-122.0, 67.25], [-122.25, 67.35], [-122.5, 67.25], [-122.75, 67.35], [-123.0, 67.25], [-123.25, 67.35], [-123.5, 67.25], [-123.75, 67.35], [-123.82, 67.32], [-123.97, 66.97], [-124.5, 66.75], [-124.75, 66.85], [-125.0, 66.75], [-125.25, 66.85], [-125.5, 66.75], [-125.75, 66.85], [-126.0, 66.75], [-126.53, 66.97], [-126.75, 67.5], [-126.65, 67.75], [-126.75, 68.0]]]]}, "2025-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-126.75, 68.0], [-126.53, 68.53], [-126.18, 68.68], [-126.03, 69.03], [-125.5, 69.25], [-125.25, 69.15], [-125.0, 69.25], [-124.75, 69.15], [-124.5, 69.25], [-124.25, 69.15], [-124.0, 69.25], [-123.75, 69.15], [-123.68, 69.18], [-123.53, 69.53], [-123.0, 69.75], [-122.75, 69.65], [-122.68, 69.68], [-122.53, 70.03], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-120.97, 70.03], [-120.82, 69.68], [-120.75, 69.65], [-120.5, 69.75], [-120.25, 69.65], [-120.0, 69.75], [-119.75, 69.65], [-119.5, 69.75], [-118.97, 69.53], [-118.82, 69.18], [-118.75, 69.15], [-118.5, 69.25], [-118.25, 69.15], [-118.0, 69.25], [-117.75, 69.15], [-117.5, 69.25], [-117.25, 69.15], [-117.0, 69.25], [-116.75, 69.15], [-116.5, 69.25], [-116.25, 69.15], [-116.0, 69.25], [-115.47, 69.03], [-115.32, 68.68], [-114.97, 68.53], [-114.82, 68.18], [-114.47, 68.03], [-114.25, 67.5], [-114.47, 66.97], [-115.0, 66.75], [-115.25, 66.85], [-115.5, 66.75], [-115.75, 66.85], [-115.82, 66.82], [-115.85, 66.75], [-115.75, 66.5], [-115.97, 65.97], [-116.5, 65.75], [-116.75, 65.85], [-117.0, 65.75], [-117.25, 65.85], [-117.5, 65.75], [-118.03, 65.97], [-118.18, 66.32], [-118.53, 66.47], [-118.75, 67.0], [-118.65, 67.25], [-118.68, 67.32], [-118.75, 67.35], [-119.0, 67.25], [-119.25, 67.35], [-119.5, 67.25], [-119.75, 67.35], [-120.0, 67.25], [-120.25, 67.35], [-120.5, 67.25], [-120.75, 67.35], [-121.0, 67.25], [-121.5, 67.46], [-122.0, 67.25], [-122.25, 67.35], [-122.5, 67.25], [-122.75, 67.35], [-123.0, 67.25], [-123.25, 67.35], [-123.5, 67.25], [-123.75, 67.35], [-123.82, 67.32], [-123.97, 66.97], [-124.5, 66.75], [-124.75, 66.85], [-125.0, 66.75], [-125.25, 66.85], [-125.5, 66.75], [-125.75, 66.85], [-126.0, 66.75], [-126.53, 66.97], [-126.75, 67.5], [-126.65, 67.75], [-126.75, 68.0]]]]}, "2025-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-125.0, 67.75], [-125.53, 67.97], [-125.75, 68.5], [-125.53, 69.03], [-125.0, 69.25], [-124.75, 69.15], [-124.5, 69.25], [-124.25, 69.15], [-124.0, 69.25], [-123.75, 69.15], [-123.68, 69.18], [-123.53, 69.53], [-123.0, 69.75], [-122.75, 69.65], [-122.68, 69.68], [-122.53, 70.03], [-122.0, 70.25], [-121.75, 70.15], [-121.5, 70.25], [-120.97, 70.03], [-120.82, 69.68], [-120.75, 69.65], [-120.5, 69.75], [-120.25, 69.65], [-120.0, 69.75], [-119.75, 69.65], [-119.5, 69.75], [-118.97, 69.53], [-118.82, 69.18], [-118.75, 69.15], [-118.5, 69.25], [-118.25, 69.15], [-118.0, 69.25], [-117.75, 69.15], [-117.5, 69.25], [-117.25, 69.15], [-117.0, 69.25], [-116.75, 69.15], [-116.5, 69.25], [-116.25, 69.15], [-116.0, 69.25], [-115.47, 69.03], [-115.32, 68.68], [-114.97, 68.53], [-114.82, 68.18], [-114.47, 68.03], [-114.25, 67.5], [-114.47, 66.97], [-115.0, 66.75], [-115.25, 66.85], [-115.5, 66.75], [-115.75, 66.85], [-115.82, 66.82], [-115.85, 66.75], [-115.75, 66.5], [-115.97, 65.97], [-116.5, 65.75], [-116.75, 65.85], [-117.0, 65.75], [-117.25, 65.85], [-117.5, 65.75], [-118.03, 65.97], [-118.18, 66.32], [-118.53, 66.47], [-118.75, 67.0], [-118.65, 67.25], [-118.68, 67.32], [-118.75, 67.35], [-119.0, 67.25], [-119.25, 67.35], [-119.5, 67.25], [-119.75, 67.35], [-120.0, 67.25], [-120.25, 67.35], [-120.5, 67.25], [-120.75, 67.35], [-121.0, 67.25], [-121.5, 67.46], [-122.0, 67.25], [-122.25, 67.35], [-122.5, 67.25], [-123.03, 67.47], [-123.18, 67.82], [-123.25, 67.85], [-123.5, 67.75], [-123.75, 67.85], [-124.0, 67.75], [-124.25, 67.85], [-124.5, 67.75], [-124.75, 67.85], [-125.0, 67.75]]]]}, "2025-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-119.25, 68.5], [-119.03, 69.03], [-118.5, 69.25], [-118.25, 69.15], [-118.0, 69.25], [-117.75, 69.15], [-117.5, 69.25], [-117.25, 69.15], [-117.0, 69.25], [-116.75, 69.15], [-116.5, 69.25], [-116.25, 69.15], [-116.0, 69.25], [-115.47, 69.03], [-115.32, 68.68], [-114.97, 68.53], [-114.82, 68.18], [-114.47, 68.03], [-114.25, 67.5], [-114.47, 66.97], [-115.0, 66.75], [-115.25, 66.85], [-115.5, 66.75], [-115.75, 66.85], [-115.82, 66.82], [-115.85, 66.75], [-115.75, 66.5], [-115.97, 65.97], [-116.5, 65.75], [-116.75, 65.85], [-117.0, 65.75], [-117.25, 65.85], [-117.5, 65.75], [-118.03, 65.97], [-118.18, 66.32], [-118.53, 66.47], [-118.75, 67.0], [-118.65, 67.25], [-118.68, 67.32], [-119.03, 67.47], [-119.25, 68.0], [-119.15, 68.25], [-119.25, 68.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 9.7012642366671}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 6.418437371887112}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [9.366958706620835, 8.2119258161905, 9.411191227125073, 9.452971394856775, 8.367198256504366]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [11.542021687825525, 10.002868906656943, 11.59465052286788, 12.796558634440146, 9.654476420084677]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [6.144349638096185, 5.403277799866827, 6.669217809178992, 7.453201307080403, 5.7895478010781245]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.230195817015101, 6.600343477726597, 8.789209470662513, 9.7012642366671, 6.929811251253227]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.7752791429105073, 1.5663050530913116, 1.9641352219764991, 2.2229307295034677, 1.779342888832134]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [2.016437767031329, 1.8066641239642667, 2.2688250741100275, 2.7651669325176944, 2.2813225752687427]}}