{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-08-31 16:20:39.950440", "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": "2026-Aug-20_to_2026-Aug-23_231.5_54.5"}, "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": 2026080001802}, "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": true}, "start_date": {"name": "Start date", "description": "First date on which grid points are under the influence of an event", "value": "August 20 2026"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 23 2026"}, "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": 122031.98202498471}, "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"]}, "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": []}, "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": 54.5}, "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": 231.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "231.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 230.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 236.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 51.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 56.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2026-08-20T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.25, 55.5], [-130.03, 56.03], [-129.5, 56.25], [-129.25, 56.15], [-129.0, 56.25], [-128.75, 56.15], [-128.5, 56.25], [-127.97, 56.03], [-127.82, 55.68], [-127.47, 55.53], [-127.25, 55.0], [-127.35, 54.75], [-127.25, 54.5], [-127.35, 54.25], [-127.32, 54.18], [-127.25, 54.15], [-127.0, 54.25], [-126.47, 54.03], [-126.25, 53.5], [-126.35, 53.25], [-126.32, 53.18], [-125.97, 53.03], [-125.82, 52.68], [-125.75, 52.65], [-125.5, 52.75], [-124.97, 52.53], [-124.75, 52.0], [-124.85, 51.75], [-124.75, 51.5], [-124.97, 50.97], [-125.5, 50.75], [-125.75, 50.85], [-126.0, 50.75], [-126.53, 50.97], [-126.75, 51.5], [-126.65, 51.75], [-126.68, 51.82], [-126.75, 51.85], [-127.0, 51.75], [-127.25, 51.85], [-127.5, 51.75], [-127.75, 51.85], [-128.0, 51.75], [-128.53, 51.97], [-128.68, 52.32], [-129.03, 52.47], [-129.18, 52.82], [-129.53, 52.97], [-129.75, 53.5], [-129.65, 53.75], [-129.75, 54.0], [-129.54, 54.5], [-129.68, 54.82], [-130.03, 54.97], [-130.25, 55.5]]]]}, "2026-08-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.25, 54.0], [-130.03, 54.53], [-129.68, 54.68], [-129.65, 54.75], [-129.68, 54.82], [-130.03, 54.97], [-130.25, 55.5], [-130.03, 56.03], [-129.5, 56.25], [-129.25, 56.15], [-129.0, 56.25], [-128.75, 56.15], [-128.5, 56.25], [-128.25, 56.15], [-128.18, 56.18], [-128.03, 56.53], [-127.5, 56.75], [-127.25, 56.65], [-127.0, 56.75], [-126.47, 56.53], [-126.32, 56.18], [-126.25, 56.15], [-126.18, 56.18], [-126.03, 56.53], [-125.5, 56.75], [-124.97, 56.53], [-124.75, 56.0], [-124.85, 55.75], [-124.82, 55.68], [-124.47, 55.53], [-124.25, 55.0], [-124.37, 54.7], [-123.97, 54.53], [-123.75, 54.0], [-123.85, 53.75], [-123.82, 53.68], [-123.47, 53.53], [-123.25, 53.0], [-123.35, 52.75], [-123.32, 52.68], [-122.97, 52.53], [-122.75, 52.0], [-122.97, 51.47], [-123.5, 51.25], [-123.75, 51.35], [-124.0, 51.25], [-124.25, 51.35], [-124.5, 51.25], [-124.8, 51.38], [-124.97, 50.97], [-125.5, 50.75], [-125.75, 50.85], [-126.0, 50.75], [-126.53, 50.97], [-126.75, 51.5], [-126.65, 51.75], [-126.68, 51.82], [-126.75, 51.85], [-127.0, 51.75], [-127.25, 51.85], [-127.5, 51.75], [-127.75, 51.85], [-128.0, 51.75], [-128.53, 51.97], [-128.68, 52.32], [-129.03, 52.47], [-129.18, 52.82], [-129.53, 52.97], [-129.68, 53.32], [-130.03, 53.47], [-130.25, 54.0]]]]}, "2026-08-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-130.25, 54.0], [-130.03, 54.53], [-129.68, 54.68], [-129.65, 54.75], [-129.68, 54.82], [-130.03, 54.97], [-130.25, 55.5], [-130.03, 56.03], [-129.5, 56.25], [-129.25, 56.15], [-129.0, 56.25], [-128.75, 56.15], [-128.5, 56.25], [-128.25, 56.15], [-128.18, 56.18], [-128.03, 56.53], [-127.5, 56.75], [-127.25, 56.65], [-127.0, 56.75], [-126.47, 56.53], [-126.32, 56.18], [-126.25, 56.15], [-126.18, 56.18], [-126.03, 56.53], [-125.5, 56.75], [-124.97, 56.53], [-124.75, 56.0], [-124.85, 55.75], [-124.82, 55.68], [-124.47, 55.53], [-124.25, 55.0], [-124.37, 54.7], [-123.97, 54.53], [-123.75, 54.0], [-123.85, 53.75], [-123.82, 53.68], [-123.47, 53.53], [-123.25, 53.0], [-123.35, 52.75], [-123.32, 52.68], [-122.97, 52.53], [-122.75, 52.0], [-122.97, 51.47], [-123.5, 51.25], [-123.75, 51.35], [-124.0, 51.25], [-124.25, 51.35], [-124.5, 51.25], [-124.8, 51.38], [-124.97, 50.97], [-125.5, 50.75], [-125.75, 50.85], [-126.0, 50.75], [-126.53, 50.97], [-126.75, 51.5], [-126.65, 51.75], [-126.68, 51.82], [-126.75, 51.85], [-127.0, 51.75], [-127.25, 51.85], [-127.5, 51.75], [-127.75, 51.85], [-128.0, 51.75], [-128.53, 51.97], [-128.68, 52.32], [-129.03, 52.47], [-129.18, 52.82], [-129.53, 52.97], [-129.68, 53.32], [-130.03, 53.47], [-130.25, 54.0]]]]}, "2026-08-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-129.18, 55.18], [-129.03, 55.53], [-128.68, 55.68], [-128.53, 56.03], [-128.18, 56.18], [-128.03, 56.53], [-127.5, 56.75], [-127.25, 56.65], [-127.0, 56.75], [-126.47, 56.53], [-126.32, 56.18], [-126.25, 56.15], [-126.18, 56.18], [-126.03, 56.53], [-125.5, 56.75], [-124.97, 56.53], [-124.75, 56.0], [-124.85, 55.75], [-124.82, 55.68], [-124.47, 55.53], [-124.25, 55.0], [-124.37, 54.7], [-123.97, 54.53], [-123.75, 54.0], [-123.85, 53.75], [-123.82, 53.68], [-123.47, 53.53], [-123.25, 53.0], [-123.35, 52.75], [-123.32, 52.68], [-122.97, 52.53], [-122.75, 52.0], [-122.97, 51.47], [-123.5, 51.25], [-123.75, 51.35], [-124.0, 51.25], [-124.25, 51.35], [-124.5, 51.25], [-125.03, 51.47], [-125.25, 52.0], [-125.12, 52.3], [-125.25, 52.35], [-125.5, 52.25], [-125.75, 52.35], [-126.0, 52.25], [-126.25, 52.35], [-126.5, 52.25], [-126.75, 52.35], [-127.0, 52.25], [-127.53, 52.47], [-127.68, 52.82], [-128.03, 52.97], [-128.18, 53.32], [-128.25, 53.35], [-128.5, 53.25], [-128.75, 53.35], [-129.0, 53.25], [-129.25, 53.35], [-129.5, 53.25], [-130.03, 53.47], [-130.25, 54.0], [-130.03, 54.53], [-129.68, 54.68], [-129.53, 55.03], [-129.18, 55.18]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.597213626530106}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 5.054730573750147}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [15.605267733619314, 16.766510776500866, 17.783945290484837, 14.88062353328786]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [17.59707158406576, 19.407634989420615, 20.95255050659182, 18.51760635375979]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.9752940201171207, 5.078441703976829, 6.456841774224758, 3.721957662418273]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.060176304600873, 6.628699366908052, 7.597213626530106, 4.804417751240635]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.6405879324039367, 2.1341836312021836, 2.834461965431138, 1.6905010797868558]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.9028953107297777, 2.9739821671950426, 3.315233040461775, 2.0644752676289326]}}