{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 17:05:34.899005", "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-May-27_to_2025-May-29_286.5_54.0"}, "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": 2025050002573}, "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": "May 27 2025"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 29 2025"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 3}, "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": 64353.410183117}, "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": 54.0}, "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": 286.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "286.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 282.5}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 287.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 54.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 55.5}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-78.25, 55.0], [-78.03, 55.53], [-77.5, 55.75], [-77.25, 55.65], [-77.18, 55.68], [-77.03, 56.03], [-76.5, 56.25], [-76.25, 56.15], [-76.0, 56.25], [-75.75, 56.15], [-75.5, 56.25], [-74.97, 56.03], [-74.8, 55.62], [-74.68, 55.68], [-74.53, 56.03], [-74.0, 56.25], [-73.75, 56.15], [-73.5, 56.25], [-73.25, 56.15], [-73.0, 56.25], [-72.47, 56.03], [-72.32, 55.68], [-71.97, 55.53], [-71.75, 55.0], [-71.97, 54.47], [-72.32, 54.32], [-72.35, 54.25], [-72.25, 54.0], [-72.47, 53.47], [-73.0, 53.25], [-73.25, 53.35], [-73.5, 53.25], [-73.75, 53.35], [-74.0, 53.25], [-74.25, 53.35], [-74.5, 53.25], [-74.75, 53.35], [-75.0, 53.25], [-75.25, 53.35], [-75.5, 53.25], [-75.75, 53.35], [-76.0, 53.25], [-76.25, 53.35], [-76.5, 53.25], [-76.75, 53.35], [-77.0, 53.25], [-77.25, 53.35], [-77.5, 53.25], [-78.03, 53.47], [-78.25, 54.0], [-78.15, 54.25], [-78.25, 54.5], [-78.15, 54.75], [-78.25, 55.0]]]]}}, "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": {"2025-05-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.25, 54.5], [-78.14999999999998, 54.75], [-78.25, 55.0], [-78.02999999999997, 55.53], [-77.5, 55.75], [-77.25, 55.65], [-77.18, 55.68], [-77.02999999999997, 56.03], [-76.5, 56.25], [-76.25, 56.15], [-76.0, 56.25], [-75.75, 56.15], [-75.5, 56.25], [-74.97000000000003, 56.03], [-74.80000000000001, 55.62], [-74.68, 55.68], [-74.52999999999997, 56.03], [-74.0, 56.25], [-73.75, 56.15], [-73.5, 56.25], [-73.25, 56.15], [-73.0, 56.25], [-72.47000000000003, 56.03], [-72.32, 55.68], [-71.97000000000003, 55.53], [-71.75, 55.0], [-71.97000000000003, 54.47], [-72.32, 54.32], [-72.35000000000002, 54.25], [-72.25, 54.0], [-72.47000000000003, 53.47], [-73.0, 53.25], [-73.25, 53.35], [-73.5, 53.25], [-73.75, 53.35], [-74.0, 53.25], [-74.25, 53.35], [-74.5, 53.25], [-74.75, 53.35], [-75.0, 53.25], [-75.25, 53.35], [-75.5, 53.25], [-75.75, 53.35], [-76.0, 53.25], [-76.25, 53.35], [-76.5, 53.25], [-76.75, 53.35], [-77.0, 53.25], [-77.25, 53.35], [-77.5, 53.25], [-78.02999999999997, 53.47], [-78.25, 54.0], [-78.14999999999998, 54.25], [-78.25, 54.5]]]]}, "2025-05-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.25, 54.5], [-78.14999999999998, 54.75], [-78.25, 55.0], [-78.02999999999997, 55.53], [-77.5, 55.75], [-77.25, 55.65], [-77.18, 55.68], [-77.02999999999997, 56.03], [-76.5, 56.25], [-76.25, 56.15], [-76.0, 56.25], [-75.75, 56.15], [-75.5, 56.25], [-74.97000000000003, 56.03], [-74.80000000000001, 55.62], [-74.68, 55.68], [-74.52999999999997, 56.03], [-74.0, 56.25], [-73.75, 56.15], [-73.5, 56.25], [-73.25, 56.15], [-73.0, 56.25], [-72.47000000000003, 56.03], [-72.32, 55.68], [-71.97000000000003, 55.53], [-71.75, 55.0], [-71.97000000000003, 54.47], [-72.32, 54.32], [-72.35000000000002, 54.25], [-72.25, 54.0], [-72.47000000000003, 53.47], [-73.0, 53.25], [-73.25, 53.35], [-73.5, 53.25], [-73.75, 53.35], [-74.0, 53.25], [-74.25, 53.35], [-74.5, 53.25], [-74.75, 53.35], [-75.0, 53.25], [-75.25, 53.35], [-75.5, 53.25], [-75.75, 53.35], [-76.0, 53.25], [-76.25, 53.35], [-76.5, 53.25], [-76.75, 53.35], [-77.0, 53.25], [-77.25, 53.35], [-77.5, 53.25], [-78.02999999999997, 53.47], [-78.25, 54.0], [-78.14999999999998, 54.25], [-78.25, 54.5]]]]}, "2025-05-29T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.25, 54.5], [-78.14999999999998, 54.75], [-78.25, 55.0], [-78.02999999999997, 55.53], [-77.5, 55.75], [-77.25, 55.65], [-77.18, 55.68], [-77.02999999999997, 56.03], [-76.5, 56.25], [-76.25, 56.15], [-76.0, 56.25], [-75.75, 56.15], [-75.5, 56.25], [-74.97000000000003, 56.03], [-74.80000000000001, 55.62], [-74.68, 55.68], [-74.52999999999997, 56.03], [-74.0, 56.25], [-73.75, 56.15], [-73.5, 56.25], [-73.25, 56.15], [-73.0, 56.25], [-72.47000000000003, 56.03], [-72.32, 55.68], [-71.97000000000003, 55.53], [-71.75, 55.0], [-71.97000000000003, 54.47], [-72.32, 54.32], [-72.35000000000002, 54.25], [-72.25, 54.0], [-72.47000000000003, 53.47], [-73.0, 53.25], [-73.25, 53.35], [-73.5, 53.25], [-73.75, 53.35], [-74.0, 53.25], [-74.25, 53.35], [-74.5, 53.25], [-74.75, 53.35], [-75.0, 53.25], [-75.25, 53.35], [-75.5, 53.25], [-75.75, 53.35], [-76.0, 53.25], [-76.25, 53.35], [-76.5, 53.25], [-76.75, 53.35], [-77.0, 53.25], [-77.25, 53.35], [-77.5, 53.25], [-78.02999999999997, 53.47], [-78.25, 54.0], [-78.14999999999998, 54.25], [-78.25, 54.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 12.608083787062924}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 10.278444021509644}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [13.68489679407196, 17.273279091163943, 16.63496127658425]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [16.466121927897177, 19.144334411621116, 18.871255493164085]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [8.189312034944772, 11.67090899200871, 10.975111037575449]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [8.754565485731916, 12.608083787062924, 11.947931947384347]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.4095967642024487, 2.098895777409423, 2.1107409474553567]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.5412097669293492, 2.2152424454130286, 2.3348074477270453]}}