{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:53:26.077674", "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-May-08_to_2023-May-12_283.5_61.0"}, "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": 2023050001655}, "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 08 2023"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 12 2023"}, "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": 51649.57981021864}, "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": 61.0}, "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": 283.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "283.5\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": 286.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 58.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-77.75, 60.5], [-77.53, 61.03], [-77.18, 61.18], [-77.15, 61.25], [-77.25, 61.5], [-77.15, 61.75], [-77.25, 62.0], [-77.03, 62.53], [-76.5, 62.75], [-76.25, 62.65], [-76.0, 62.75], [-75.75, 62.65], [-75.5, 62.75], [-75.25, 62.65], [-75.0, 62.75], [-74.75, 62.65], [-74.5, 62.75], [-74.25, 62.65], [-74.0, 62.75], [-73.47, 62.53], [-73.25, 62.0], [-73.47, 61.47], [-73.82, 61.32], [-73.97, 60.97], [-74.32, 60.82], [-74.35, 60.75], [-74.32, 60.68], [-73.97, 60.53], [-73.82, 60.18], [-73.47, 60.03], [-73.25, 59.5], [-73.47, 58.97], [-74.0, 58.75], [-74.53, 58.97], [-74.68, 59.32], [-74.75, 59.35], [-75.0, 59.25], [-75.25, 59.35], [-75.37, 59.3], [-75.25, 59.0], [-75.35, 58.75], [-75.25, 58.5], [-75.47, 57.97], [-76.0, 57.75], [-76.53, 57.97], [-76.68, 58.32], [-76.75, 58.35], [-77.0, 58.25], [-77.25, 58.35], [-77.5, 58.25], [-78.03, 58.47], [-78.25, 59.0], [-78.03, 59.53], [-77.68, 59.68], [-77.65, 59.75], [-77.75, 60.0], [-77.65, 60.25], [-77.75, 60.5]]]]}}, "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": {"2023-05-08T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.02999999999997, 61.53], [-76.5, 61.75], [-75.97000000000003, 61.53], [-75.75, 61.0], [-75.97000000000003, 60.47], [-76.5, 60.25], [-77.02999999999997, 60.47], [-77.25, 61.0], [-77.02999999999997, 61.53]]]]}, "2023-05-09T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.64999999999998, 59.75], [-77.75, 60.0], [-77.64999999999998, 60.25], [-77.75, 60.5], [-77.52999999999997, 61.03], [-77.18, 61.18], [-77.14999999999998, 61.25], [-77.25, 61.5], [-77.14999999999998, 61.75], [-77.25, 62.0], [-77.02999999999997, 62.53], [-76.5, 62.75], [-76.25, 62.65], [-76.0, 62.75], [-75.75, 62.65], [-75.5, 62.75], [-75.25, 62.65], [-75.0, 62.75], [-74.75, 62.65], [-74.5, 62.75], [-74.25, 62.65], [-74.0, 62.75], [-73.47000000000003, 62.53], [-73.25, 62.0], [-73.47000000000003, 61.47], [-73.82, 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anomaly recorded over entire duration", "value": 8.434770811629676}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 6.670905194545591}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-0.5051387670735608, 0.6747137039116069, 2.611982980076675, 2.1774087920016996, 1.127926142641627]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-0.5051387670735608, 1.6446729455279865, 4.1995741882552124, 2.8110785964739193, 1.8411492487582564]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [5.2903197833362015, 5.987893499405633, 7.611087824805018, 6.761983664878879, 5.603601129169861]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [5.2903197833362015, 7.656624174879084, 8.434770811629676, 8.180122518346252, 6.222381261358066]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.3147855456999402, 1.4895822220202737, 1.9295820937536603, 1.7004034825106564, 1.3911363858266408]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.3147855456999402, 1.8782070708622212, 2.168709314841555, 1.9581040320244107, 1.4840617368719273]}}