{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:55:21.962557", "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": "2023-Sep-11_to_2023-Sep-16_277.0_56.0"}, "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": 2023090001355}, "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 11 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "September 16 2023"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 6}, "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": 189165.27070440535}, "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": 56.0}, "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": 277.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "277.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 265.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 279.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 59.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-82.25, 57.65], [-82.0, 57.75], [-81.75, 57.65], [-81.5, 57.75], [-80.97, 57.53], [-80.82, 57.18], [-80.75, 57.15], [-80.5, 57.25], [-79.97, 57.03], [-79.75, 56.5], [-79.96, 56.0], [-79.75, 55.5], [-79.97, 54.97], [-80.5, 54.75], [-80.75, 54.85], [-80.82, 54.82], [-80.97, 54.47], [-81.5, 54.25], [-82.03, 54.47], [-82.18, 54.82], [-82.25, 54.85], [-82.5, 54.75], [-82.75, 54.85], [-83.0, 54.75], [-83.25, 54.85], [-83.5, 54.75], [-83.75, 54.85], [-84.0, 54.75], [-84.25, 54.85], [-84.5, 54.75], [-84.75, 54.85], [-85.0, 54.75], [-85.25, 54.85], [-85.5, 54.75], [-86.03, 54.97], [-86.18, 55.32], [-86.25, 55.35], [-86.5, 55.25], [-86.75, 55.35], [-87.0, 55.25], [-87.53, 55.47], [-87.68, 55.82], [-88.03, 55.97], [-88.18, 56.32], [-88.25, 56.35], [-88.5, 56.25], [-88.75, 56.35], [-89.0, 56.25], [-89.53, 56.47], [-89.68, 56.82], [-89.75, 56.85], [-90.0, 56.75], [-90.25, 56.85], [-90.5, 56.75], [-90.75, 56.85], [-91.0, 56.75], [-91.25, 56.85], [-91.5, 56.75], [-91.75, 56.85], [-92.0, 56.75], [-92.53, 56.97], [-92.68, 57.32], [-92.75, 57.35], [-92.82, 57.32], [-92.97, 56.97], [-93.5, 56.75], [-93.75, 56.85], [-94.0, 56.75], [-94.25, 56.85], [-94.5, 56.75], [-95.03, 56.97], [-95.25, 57.5], [-95.15, 57.75], [-95.25, 58.0], [-95.12, 58.3], [-95.53, 58.47], [-95.75, 59.0], [-95.53, 59.53], [-95.0, 59.75], [-94.75, 59.65], [-94.5, 59.75], [-94.25, 59.65], [-94.0, 59.75], [-93.75, 59.65], [-93.5, 59.75], [-93.25, 59.65], [-93.0, 59.75], [-92.75, 59.65], [-92.5, 59.75], [-92.25, 59.65], [-92.0, 59.75], [-91.75, 59.65], [-91.5, 59.75], [-91.25, 59.65], [-91.0, 59.75], [-90.75, 59.65], [-90.5, 59.75], [-89.97, 59.53], [-89.82, 59.18], [-89.47, 59.03], [-89.32, 58.68], [-89.25, 58.65], [-89.0, 58.75], [-88.75, 58.65], [-88.5, 58.75], [-88.25, 58.65], [-88.0, 58.75], [-87.75, 58.65], [-87.5, 58.75], [-87.25, 58.65], [-87.0, 58.75], [-86.75, 58.65], [-86.5, 58.75], [-86.25, 58.65], [-86.0, 58.75], [-85.75, 58.65], [-85.5, 58.75], [-85.25, 58.65], [-85.0, 58.75], [-84.47, 58.53], [-84.32, 58.18], [-84.25, 58.15], [-84.0, 58.25], [-83.75, 58.15], [-83.5, 58.25], [-82.97, 58.03], [-82.82, 57.68], [-82.75, 57.65], [-82.5, 57.75], [-82.25, 57.65]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2023-09-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.0, 58.25], [-95.52999999999997, 58.47], [-95.75, 59.0], [-95.52999999999997, 59.53], [-95.0, 59.75], [-94.75, 59.65], [-94.5, 59.75], [-94.25, 59.65], [-94.0, 59.75], [-93.75, 59.65], [-93.5, 59.75], [-93.25, 59.65], [-93.0, 59.75], [-92.75, 59.65], [-92.5, 59.75], [-92.25, 59.65], [-92.0, 59.75], [-91.75, 59.65], [-91.5, 59.75], [-91.25, 59.65], [-91.0, 59.75], [-90.75, 59.65], [-90.5, 59.75], [-89.97000000000003, 59.53], [-89.75, 59.0], [-89.85000000000002, 58.75], [-89.75, 58.5], [-89.97000000000003, 57.97], [-90.5, 57.75], [-90.75, 57.85], [-91.0, 57.75], [-91.25, 57.85], [-91.5, 57.75], [-91.75, 57.85], [-92.0, 57.75], [-92.25, 57.85], [-92.5, 57.75], [-93.02999999999997, 57.97], [-93.18, 58.32], [-93.25, 58.35], [-93.5, 58.25], [-93.75, 58.35], [-94.0, 58.25], [-94.25, 58.35], [-94.5, 58.25], [-94.75, 58.35], [-95.0, 58.25]]]]}, "2023-09-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.25, 58.0], [-95.12, 58.3], [-95.52999999999997, 58.47], [-95.75, 59.0], [-95.52999999999997, 59.53], [-95.0, 59.75], [-94.75, 59.65], [-94.5, 59.75], [-94.25, 59.65], [-94.0, 59.75], [-93.75, 59.65], [-93.5, 59.75], [-93.25, 59.65], [-93.0, 59.75], [-92.75, 59.65], [-92.5, 59.75], [-92.25, 59.65], [-92.0, 59.75], [-91.75, 59.65], [-91.5, 59.75], [-91.25, 59.65], [-91.0, 59.75], [-90.75, 59.65], [-90.5, 59.75], [-89.97000000000003, 59.53], [-89.82, 59.18], [-89.47000000000003, 59.03], [-89.32, 58.68], [-89.25, 58.65], [-89.0, 58.75], [-88.75, 58.65], [-88.5, 58.75], [-88.25, 58.65], [-88.0, 58.75], [-87.75, 58.65], [-87.5, 58.75], [-87.25, 58.65], [-87.0, 58.75], [-86.75, 58.65], [-86.5, 58.75], [-86.25, 58.65], [-86.0, 58.75], [-85.75, 58.65], [-85.5, 58.75], [-85.25, 58.65], [-85.0, 58.75], [-84.47000000000003, 58.53], [-84.32, 58.18], [-84.25, 58.15], [-84.0, 58.25], [-83.75, 58.15], [-83.5, 58.25], [-82.97000000000003, 58.03], [-82.82, 57.68], [-82.75, 57.65], [-82.5, 57.75], [-82.25, 57.65], [-82.0, 57.75], [-81.75, 57.65], [-81.5, 57.75], [-80.97000000000003, 57.53], [-80.82, 57.18], [-80.75, 57.15], [-80.5, 57.25], [-79.97000000000003, 57.03], [-79.75, 56.5], [-79.97000000000003, 55.97], [-80.5, 55.75], [-80.75, 55.85], [-80.82, 55.82], [-80.97000000000003, 55.47], [-81.5, 55.25], [-81.75, 55.35], [-82.0, 55.25], [-82.25, 55.35], [-82.5, 55.25], [-82.75, 55.35], [-83.0, 55.25], [-83.25, 55.35], [-83.5, 55.25], [-83.75, 55.35], [-84.0, 55.25], [-84.25, 55.35], [-84.5, 55.25], [-84.75, 55.35], [-85.0, 55.25], [-85.25, 55.35], [-85.5, 55.25], [-85.75, 55.35], [-86.0, 55.25], [-86.25, 55.35], [-86.5, 55.25], [-87.02999999999997, 55.47], [-87.18, 55.82], [-87.25, 55.85], [-87.5, 55.75], [-88.02999999999997, 55.97], [-88.18, 56.32], [-88.25, 56.35], [-88.5, 56.25], [-88.75, 56.35], [-89.0, 56.25], [-89.52999999999997, 56.47], [-89.68, 56.82], [-89.75, 56.85], [-90.0, 56.75], [-90.25, 56.85], [-90.5, 56.75], [-90.75, 56.85], [-91.0, 56.75], [-91.25, 56.85], [-91.5, 56.75], [-91.75, 56.85], [-92.0, 56.75], [-92.52999999999997, 56.97], [-92.68, 57.32], [-92.75, 57.35], [-92.82, 57.32], [-92.97000000000003, 56.97], [-93.5, 56.75], [-93.75, 56.85], [-94.0, 56.75], [-94.25, 56.85], [-94.5, 56.75], [-95.02999999999997, 56.97], [-95.25, 57.5], [-95.14999999999998, 57.75], [-95.25, 58.0]]]]}, "2023-09-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.25, 58.0], [-95.12, 58.3], [-95.52999999999997, 58.47], [-95.75, 59.0], [-95.52999999999997, 59.53], [-95.0, 59.75], [-94.75, 59.65], [-94.5, 59.75], [-94.25, 59.65], [-94.0, 59.75], [-93.75, 59.65], [-93.5, 59.75], [-93.25, 59.65], [-93.0, 59.75], [-92.75, 59.65], [-92.5, 59.75], [-92.25, 59.65], [-92.0, 59.75], [-91.75, 59.65], [-91.5, 59.75], [-91.25, 59.65], [-91.0, 59.75], [-90.75, 59.65], [-90.5, 59.75], [-89.97000000000003, 59.53], [-89.82, 59.18], [-89.47000000000003, 59.03], [-89.32, 58.68], [-89.25, 58.65], [-89.0, 58.75], [-88.75, 58.65], [-88.5, 58.75], [-88.25, 58.65], [-88.0, 58.75], [-87.75, 58.65], [-87.5, 58.75], [-87.25, 58.65], [-87.0, 58.75], [-86.75, 58.65], [-86.5, 58.75], [-86.25, 58.65], [-86.0, 58.75], [-85.75, 58.65], [-85.5, 58.75], [-85.25, 58.65], [-85.0, 58.75], [-84.47000000000003, 58.53], [-84.32, 58.18], [-84.25, 58.15], [-84.0, 58.25], [-83.75, 58.15], [-83.5, 58.25], [-82.97000000000003, 58.03], [-82.82, 57.68], [-82.75, 57.65], [-82.5, 57.75], [-82.25, 57.65], [-82.0, 57.75], [-81.75, 57.65], [-81.5, 57.75], [-80.97000000000003, 57.53], [-80.82, 57.18], [-80.75, 57.15], [-80.5, 57.25], [-79.97000000000003, 57.03], [-79.75, 56.5], [-79.95999999999998, 56.0], [-79.75, 55.5], [-79.97000000000003, 54.97], [-80.5, 54.75], [-80.75, 54.85], [-80.82, 54.82], [-80.97000000000003, 54.47], [-81.5, 54.25], [-82.02999999999997, 54.47], [-82.18, 54.82], [-82.25, 54.85], [-82.5, 54.75], [-82.75, 54.85], [-83.0, 54.75], [-83.25, 54.85], [-83.5, 54.75], [-83.75, 54.85], [-84.0, 54.75], [-84.25, 54.85], [-84.5, 54.75], [-84.75, 54.85], [-85.0, 54.75], [-85.25, 54.85], [-85.5, 54.75], [-86.02999999999997, 54.97], [-86.18, 55.32], [-86.25, 55.35], [-86.5, 55.25], [-86.75, 55.35], [-87.0, 55.25], [-87.52999999999997, 55.47], [-87.68, 55.82], [-88.02999999999997, 55.97], [-88.18, 56.32], [-88.25, 56.35], [-88.5, 56.25], [-88.75, 56.35], [-89.0, 56.25], [-89.52999999999997, 56.47], [-89.68, 56.82], [-89.75, 56.85], [-90.0, 56.75], [-90.25, 56.85], [-90.5, 56.75], [-90.75, 56.85], [-91.0, 56.75], [-91.25, 56.85], [-91.5, 56.75], [-91.75, 56.85], [-92.0, 56.75], [-92.52999999999997, 56.97], [-92.68, 57.32], [-92.75, 57.35], [-92.82, 57.32], [-92.97000000000003, 56.97], [-93.5, 56.75], [-93.75, 56.85], [-94.0, 56.75], [-94.25, 56.85], [-94.5, 56.75], [-95.02999999999997, 56.97], [-95.25, 57.5], [-95.14999999999998, 57.75], [-95.25, 58.0]]]]}, "2023-09-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-95.25, 58.0], [-95.02999999999997, 58.53], [-94.5, 58.75], [-94.25, 58.65], [-94.0, 58.75], [-93.75, 58.65], [-93.68, 58.68], [-93.52999999999997, 59.03], [-93.0, 59.25], [-92.75, 59.15], [-92.5, 59.25], [-92.25, 59.15], [-92.0, 59.25], [-91.75, 59.15], [-91.5, 59.25], [-91.25, 59.15], [-91.0, 59.25], [-90.75, 59.15], [-90.5, 59.25], [-90.25, 59.15], [-90.0, 59.25], [-89.47000000000003, 59.03], [-89.32, 58.68], [-89.25, 58.65], [-89.0, 58.75], [-88.75, 58.65], [-88.5, 58.75], [-88.25, 58.65], [-88.0, 58.75], [-87.75, 58.65], [-87.5, 58.75], [-87.25, 58.65], [-87.0, 58.75], [-86.75, 58.65], [-86.5, 58.75], [-86.25, 58.65], [-86.0, 58.75], [-85.75, 58.65], [-85.5, 58.75], [-85.25, 58.65], [-85.0, 58.75], [-84.47000000000003, 58.53], [-84.32, 58.18], [-84.25, 58.15], [-84.0, 58.25], [-83.75, 58.15], [-83.5, 58.25], [-82.97000000000003, 58.03], [-82.82, 57.68], [-82.75, 57.65], [-82.5, 57.75], [-82.25, 57.65], [-82.0, 57.75], [-81.75, 57.65], [-81.5, 57.75], [-80.97000000000003, 57.53], [-80.82, 57.18], [-80.75, 57.15], [-80.5, 57.25], [-79.97000000000003, 57.03], [-79.75, 56.5], [-79.95999999999998, 56.0], [-79.75, 55.5], [-79.97000000000003, 54.97], [-80.5, 54.75], [-80.75, 54.85], [-80.82, 54.82], [-80.97000000000003, 54.47], [-81.5, 54.25], [-82.02999999999997, 54.47], [-82.18, 54.82], [-82.25, 54.85], [-82.5, 54.75], [-82.75, 54.85], [-83.0, 54.75], [-83.25, 54.85], [-83.5, 54.75], [-83.75, 54.85], [-84.0, 54.75], [-84.25, 54.85], [-84.5, 54.75], [-84.75, 54.85], [-85.0, 54.75], [-85.25, 54.85], [-85.5, 54.75], [-86.02999999999997, 54.97], [-86.18, 55.32], [-86.25, 55.35], [-86.5, 55.25], [-86.75, 55.35], [-87.0, 55.25], [-87.52999999999997, 55.47], [-87.68, 55.82], [-88.02999999999997, 55.97], [-88.18, 56.32], [-88.25, 56.35], [-88.5, 56.25], [-88.75, 56.35], [-89.0, 56.25], [-89.52999999999997, 56.47], [-89.68, 56.82], [-89.75, 56.85], [-90.0, 56.75], [-90.25, 56.85], [-90.5, 56.75], [-90.75, 56.85], [-91.0, 56.75], [-91.25, 56.85], [-91.5, 56.75], [-91.75, 56.85], [-92.0, 56.75], [-92.52999999999997, 56.97], [-92.68, 57.32], [-92.75, 57.35], [-92.82, 57.32], [-92.97000000000003, 56.97], [-93.5, 56.75], [-93.75, 56.85], [-94.0, 56.75], [-94.25, 56.85], [-94.5, 56.75], [-95.02999999999997, 56.97], [-95.25, 57.5], [-95.14999999999998, 57.75], [-95.25, 58.0]]]]}, "2023-09-15T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-88.25, 57.0], [-88.02999999999997, 57.53], [-87.5, 57.75], [-87.25, 57.65], [-87.18, 57.68], [-87.02999999999997, 58.03], [-86.5, 58.25], [-86.0, 58.04], [-85.5, 58.25], [-85.25, 58.15], [-85.0, 58.25], [-84.47000000000003, 58.03], [-84.32, 57.68], [-84.25, 57.65], [-84.0, 57.75], [-83.75, 57.65], [-83.5, 57.75], [-83.25, 57.65], [-83.0, 57.75], [-82.47000000000003, 57.53], [-82.25, 57.0], [-82.35000000000002, 56.75], [-82.32, 56.68], [-82.25, 56.65], [-82.0, 56.75], [-81.75, 56.65], [-81.5, 56.75], [-80.97000000000003, 56.53], [-80.82, 56.18], [-80.75, 56.15], [-80.5, 56.25], [-79.97000000000003, 56.03], [-79.75, 55.5], [-79.97000000000003, 54.97], [-80.5, 54.75], [-80.75, 54.85], [-80.82, 54.82], [-80.97000000000003, 54.47], [-81.5, 54.25], [-82.02999999999997, 54.47], [-82.18, 54.82], [-82.25, 54.85], [-82.5, 54.75], [-82.75, 54.85], [-83.0, 54.75], [-83.25, 54.85], [-83.5, 54.75], [-83.75, 54.85], [-84.0, 54.75], [-84.25, 54.85], [-84.5, 54.75], [-84.75, 54.85], [-85.0, 54.75], [-85.25, 54.85], [-85.5, 54.75], [-86.02999999999997, 54.97], [-86.18, 55.32], [-86.25, 55.35], [-86.5, 55.25], [-86.75, 55.35], [-87.0, 55.25], [-87.52999999999997, 55.47], [-87.68, 55.82], [-88.02999999999997, 55.97], [-88.25, 56.5], [-88.14999999999998, 56.75], [-88.25, 57.0]]]]}, "2023-09-16T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-83.52999999999997, 56.53], [-83.0, 56.75], [-82.47000000000003, 56.53], [-82.25, 56.0], [-82.47000000000003, 55.47], [-83.0, 55.25], [-83.52999999999997, 55.47], [-83.75, 56.0], [-83.52999999999997, 56.53]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 7.448652326140461}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.164159932257389}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.273735720767604, 11.511355789340087, 11.523373463469, 10.72126014853194, 9.94744087295362, 9.256890801577867]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [13.226966995453438, 15.151145593453236, 14.102325348598526, 13.60534717306075, 11.533742393423154, 9.256890801577867]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [3.905400526033524, 4.484114103357942, 4.539439097975051, 3.9260327602661054, 3.2173347419559777, 2.6714708487323833]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.242282501679654, 7.448652326140461, 6.665759039428735, 6.32944243386504, 3.9250302563903574, 2.6714708487323833]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.6812101312430283, 1.9266918326518314, 2.0118633125806777, 1.769281474391486, 1.5385843016875824, 1.3381822088401165]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.870208889981819, 2.4819143141425792, 2.4261405450695896, 2.0471684677968485, 1.8554121475251457, 1.3381822088401165]}}