{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:04:55.022635", "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-Apr-27_to_2025-Apr-30_291.0_48.5"}, "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": 2025040002680}, "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": "April 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 30 2025"}, "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": 135602.04583532378}, "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": 48.5}, "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": 291.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "291.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 288.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 296.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 48.0}, "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": [[[[-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.47, 50.53], [-63.25, 50.0], [-63.35, 49.75], [-63.25, 49.5], [-63.47, 48.97], [-63.82, 48.82], [-63.97, 48.47], [-64.5, 48.25], [-65.03, 48.47], [-65.18, 48.82], [-65.25, 48.85], [-65.5, 48.75], [-65.75, 48.85], [-66.0, 48.75], [-66.25, 48.85], [-66.32, 48.82], [-66.47, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.8, 48.38], [-67.97, 47.97], [-68.5, 47.75], [-68.75, 47.85], [-68.82, 47.82], [-68.97, 47.47], [-69.5, 47.25], [-70.03, 47.47], [-70.25, 48.0], [-70.03, 48.53], [-69.68, 48.68], [-69.57, 48.93], [-70.0, 48.75], [-70.53, 48.97], [-70.68, 49.32], [-70.75, 49.35], [-71.0, 49.25], [-71.25, 49.35], [-71.5, 49.25], [-71.75, 49.35], [-72.0, 49.25], [-72.53, 49.47], [-72.75, 50.0], [-72.53, 50.53], [-72.18, 50.68], [-72.15, 50.75], [-72.18, 50.82], [-72.53, 50.97], [-72.75, 51.5], [-72.65, 51.75], [-72.75, 52.0], [-72.53, 52.53], [-72.0, 52.75], [-71.75, 52.65], [-71.5, 52.75], [-71.25, 52.65], [-71.18, 52.68], [-71.03, 53.03], [-70.5, 53.25], [-70.25, 53.15], [-70.0, 53.25], [-69.47, 53.03], [-69.32, 52.68], [-69.25, 52.65], [-69.0, 52.75], [-68.47, 52.53], [-68.3, 52.12], [-68.0, 52.25], [-67.75, 52.15], [-67.5, 52.25], [-67.25, 52.15], [-67.0, 52.25], [-66.75, 52.15], [-66.5, 52.25], [-66.25, 52.15], [-66.0, 52.25], [-65.47, 52.03], [-65.25, 51.5], [-65.47, 50.97], [-66.0, 50.75], [-65.75, 50.65]], [[-66.75, 50.15], [-66.68, 50.18], [-66.53, 50.53], [-66.0, 50.75], [-66.25, 50.85], [-66.5, 50.75], [-66.75, 50.85], [-66.82, 50.82], [-66.85, 50.75], [-66.75, 50.5], [-66.85, 50.25], [-66.82, 50.18], [-66.75, 50.15]], [[-69.18, 49.18], [-69.15, 49.25], [-69.18, 49.32], [-69.25, 49.35], [-69.32, 49.32], [-69.43, 49.07], [-69.18, 49.18]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America", "E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2025-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-64.0, 48.75], [-64.52999999999997, 48.97], [-64.75, 49.5], [-64.52999999999997, 50.03], [-64.0, 50.25], [-63.47000000000003, 50.03], [-63.25, 49.5], [-63.47000000000003, 48.97], [-64.0, 48.75]]], [[[-72.52999999999997, 52.53], [-72.0, 52.75], [-71.75, 52.65], [-71.5, 52.75], [-71.25, 52.65], [-71.18, 52.68], [-71.02999999999997, 53.03], [-70.5, 53.25], [-70.25, 53.15], [-70.0, 53.25], [-69.47000000000003, 53.03], [-69.32, 52.68], [-69.25, 52.65], [-69.0, 52.75], [-68.47000000000003, 52.53], [-68.30000000000001, 52.12], [-68.0, 52.25], [-67.75, 52.15], [-67.5, 52.25], [-67.25, 52.15], [-67.0, 52.25], [-66.75, 52.15], [-66.5, 52.25], [-66.25, 52.15], [-66.0, 52.25], [-65.47000000000003, 52.03], [-65.25, 51.5], [-65.47000000000003, 50.97], [-66.0, 50.75], [-66.25, 50.85], [-66.5, 50.75], [-66.75, 50.85], [-66.82, 50.82], [-66.85000000000002, 50.75], [-66.75, 50.5], [-66.85000000000002, 50.25], [-66.75, 50.0], [-66.97000000000003, 49.47], [-67.5, 49.25], [-67.75, 49.35], [-67.82, 49.32], [-67.97000000000003, 48.97], [-68.5, 48.75], [-69.02999999999997, 48.97], [-69.18, 49.32], [-69.25, 49.35], [-69.32, 49.32], [-69.47000000000003, 48.97], [-70.0, 48.75], [-70.52999999999997, 48.97], [-70.68, 49.32], [-70.75, 49.35], [-71.0, 49.25], [-71.25, 49.35], [-71.5, 49.25], [-71.75, 49.35], [-72.0, 49.25], [-72.52999999999997, 49.47], [-72.75, 50.0], [-72.52999999999997, 50.53], [-72.18, 50.68], [-72.14999999999998, 50.75], [-72.18, 50.82], [-72.52999999999997, 50.97], [-72.75, 51.5], [-72.64999999999998, 51.75], [-72.75, 52.0], [-72.52999999999997, 52.53]]]]}, "2025-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.75, 52.0], [-72.52999999999997, 52.53], [-72.0, 52.75], [-71.75, 52.65], [-71.5, 52.75], [-71.25, 52.65], [-71.18, 52.68], [-71.02999999999997, 53.03], [-70.5, 53.25], [-70.25, 53.15], [-70.0, 53.25], [-69.47000000000003, 53.03], [-69.32, 52.68], [-69.25, 52.65], [-69.0, 52.75], [-68.47000000000003, 52.53], [-68.30000000000001, 52.12], [-68.0, 52.25], [-67.75, 52.15], [-67.5, 52.25], [-67.25, 52.15], [-67.0, 52.25], [-66.75, 52.15], [-66.5, 52.25], [-66.25, 52.15], [-66.0, 52.25], [-65.47000000000003, 52.03], [-65.25, 51.5], [-65.47000000000003, 50.97], [-66.0, 50.75], [-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.47000000000003, 50.53], [-63.25, 50.0], [-63.35000000000002, 49.75], [-63.25, 49.5], [-63.47000000000003, 48.97], [-63.81999999999999, 48.82], [-63.97000000000003, 48.47], [-64.5, 48.25], [-65.02999999999997, 48.47], [-65.18, 48.82], [-65.25, 48.85], [-65.5, 48.75], [-65.75, 48.85], [-66.0, 48.75], [-66.25, 48.85], [-66.32, 48.82], [-66.47000000000003, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.80000000000001, 48.38], [-67.97000000000003, 47.97], [-68.5, 47.75], [-68.75, 47.85], [-68.82, 47.82], [-68.97000000000003, 47.47], [-69.5, 47.25], [-70.02999999999997, 47.47], [-70.25, 48.0], [-70.02999999999997, 48.53], [-69.68, 48.68], [-69.57, 48.93], [-70.0, 48.75], [-70.52999999999997, 48.97], [-70.68, 49.32], [-70.75, 49.35], [-71.0, 49.25], [-71.25, 49.35], [-71.5, 49.25], [-71.75, 49.35], [-72.0, 49.25], [-72.52999999999997, 49.47], [-72.75, 50.0], [-72.52999999999997, 50.53], [-72.18, 50.68], [-72.14999999999998, 50.75], [-72.18, 50.82], [-72.52999999999997, 50.97], [-72.75, 51.5], [-72.64999999999998, 51.75], [-72.75, 52.0]], [[-66.25, 50.85], [-66.5, 50.75], [-66.75, 50.85], [-66.82, 50.82], [-66.85000000000002, 50.75], [-66.75, 50.5], [-66.85000000000002, 50.25], [-66.82, 50.18], [-66.75, 50.15], [-66.68, 50.18], [-66.52999999999997, 50.53], [-66.0, 50.75], [-66.25, 50.85]], [[-69.43, 49.07], [-69.18, 49.18], [-69.14999999999998, 49.25], [-69.18, 49.32], [-69.25, 49.35], [-69.32, 49.32], [-69.43, 49.07]]]]}, "2025-04-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.75, 52.0], [-72.52999999999997, 52.53], [-72.0, 52.75], [-71.75, 52.65], [-71.5, 52.75], [-71.25, 52.65], [-71.18, 52.68], [-71.02999999999997, 53.03], [-70.5, 53.25], [-70.25, 53.15], [-70.0, 53.25], [-69.47000000000003, 53.03], [-69.32, 52.68], [-69.25, 52.65], [-69.0, 52.75], [-68.47000000000003, 52.53], [-68.30000000000001, 52.12], [-68.0, 52.25], [-67.75, 52.15], [-67.5, 52.25], [-67.25, 52.15], [-67.0, 52.25], [-66.75, 52.15], [-66.5, 52.25], [-66.25, 52.15], [-66.0, 52.25], [-65.47000000000003, 52.03], [-65.25, 51.5], [-65.47000000000003, 50.97], [-66.0, 50.75], [-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.47000000000003, 50.53], [-63.25, 50.0], [-63.35000000000002, 49.75], [-63.25, 49.5], [-63.47000000000003, 48.97], [-63.81999999999999, 48.82], [-63.97000000000003, 48.47], [-64.5, 48.25], [-65.02999999999997, 48.47], [-65.18, 48.82], [-65.25, 48.85], [-65.5, 48.75], [-65.75, 48.85], [-66.0, 48.75], [-66.25, 48.85], [-66.32, 48.82], [-66.47000000000003, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.80000000000001, 48.38], [-67.97000000000003, 47.97], [-68.5, 47.75], [-68.75, 47.85], [-68.82, 47.82], [-68.97000000000003, 47.47], [-69.5, 47.25], [-70.02999999999997, 47.47], [-70.25, 48.0], [-70.02999999999997, 48.53], [-69.68, 48.68], [-69.57, 48.93], [-70.0, 48.75], [-70.52999999999997, 48.97], [-70.68, 49.32], [-70.75, 49.35], [-71.0, 49.25], [-71.25, 49.35], [-71.5, 49.25], [-71.75, 49.35], [-72.0, 49.25], [-72.52999999999997, 49.47], [-72.75, 50.0], [-72.52999999999997, 50.53], [-72.18, 50.68], [-72.14999999999998, 50.75], [-72.18, 50.82], [-72.52999999999997, 50.97], [-72.75, 51.5], [-72.64999999999998, 51.75], [-72.75, 52.0]], [[-66.25, 50.85], [-66.5, 50.75], [-66.75, 50.85], [-66.82, 50.82], [-66.85000000000002, 50.75], [-66.75, 50.5], [-66.85000000000002, 50.25], [-66.82, 50.18], [-66.75, 50.15], [-66.68, 50.18], [-66.52999999999997, 50.53], [-66.0, 50.75], [-66.25, 50.85]], [[-69.43, 49.07], [-69.18, 49.18], [-69.14999999999998, 49.25], [-69.18, 49.32], [-69.25, 49.35], [-69.32, 49.32], [-69.43, 49.07]]]]}, "2025-04-30T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-69.52999999999997, 49.03], [-69.18, 49.18], [-69.02999999999997, 49.53], [-68.5, 49.75], [-68.0, 49.54], [-67.68, 49.68], [-67.52999999999997, 50.03], [-67.0, 50.25], [-66.75, 50.15], [-66.68, 50.18], [-66.52999999999997, 50.53], [-66.0, 50.75], [-65.75, 50.65], [-65.5, 50.75], [-65.25, 50.65], [-65.0, 50.75], [-64.75, 50.65], [-64.5, 50.75], [-64.25, 50.65], [-64.0, 50.75], [-63.47000000000003, 50.53], [-63.25, 50.0], [-63.35000000000002, 49.75], [-63.25, 49.5], [-63.47000000000003, 48.97], [-63.81999999999999, 48.82], [-63.97000000000003, 48.47], [-64.5, 48.25], [-65.02999999999997, 48.47], [-65.18, 48.82], [-65.25, 48.85], [-65.5, 48.75], [-65.75, 48.85], [-66.0, 48.75], [-66.25, 48.85], [-66.32, 48.82], [-66.47000000000003, 48.47], [-67.0, 48.25], [-67.25, 48.35], [-67.5, 48.25], [-67.80000000000001, 48.38], [-67.97000000000003, 47.97], [-68.5, 47.75], [-68.75, 47.85], [-68.82, 47.82], [-68.97000000000003, 47.47], [-69.5, 47.25], [-70.02999999999997, 47.47], [-70.25, 48.0], [-70.02999999999997, 48.53], [-69.68, 48.68], [-69.52999999999997, 49.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 6.734022775438973}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 4.505922455773684}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [4.713443586561368, 5.559231777467687, 5.918903770999691, 5.691889431602078]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [5.8032330830891965, 7.610005950927757, 10.721217091878259, 7.5643109639485715]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [4.51175645892273, 4.652970901304839, 4.698463482354961, 3.2570167854389758]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.751433820640557, 6.510627512671135, 6.734022775438973, 4.303893821820793]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.267852732346911, 1.5598434549499325, 1.686481256228391, 2.0294095043740383]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.4646063958788396, 2.1862554443787765, 3.4406792966315063, 2.6550089367337457]}}