{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:16:30.553727", "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": "2021-Dec-11_to_2021-Dec-14_286.0_43.0"}, "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": 2021120001922}, "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": "December 11 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "December 14 2021"}, "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": 59122.74971601413}, "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", "United States"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["America", "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": 43.0}, "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": 286.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "286.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 283.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 288.5}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 43.0}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 46.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-74.25, 42.35], [-74.5, 42.25], [-75.03, 42.47], [-75.25, 43.0], [-75.03, 43.53], [-74.68, 43.68], [-74.54, 44.0], [-74.68, 44.32], [-74.75, 44.35], [-74.82, 44.32], [-74.97, 43.97], [-75.32, 43.82], [-75.47, 43.47], [-76.0, 43.25], [-76.53, 43.47], [-76.75, 44.0], [-76.65, 44.25], [-76.68, 44.32], [-76.75, 44.35], [-77.0, 44.25], [-77.53, 44.47], [-77.75, 45.0], [-77.65, 45.25], [-77.75, 45.5], [-77.65, 45.75], [-77.75, 46.0], [-77.53, 46.53], [-77.0, 46.75], [-76.75, 46.65], [-76.5, 46.75], [-75.97, 46.53], [-75.82, 46.18], [-75.47, 46.03], [-75.32, 45.68], [-75.25, 45.65], [-75.0, 45.75], [-74.75, 45.65], [-74.5, 45.75], [-74.25, 45.65], [-74.0, 45.75], [-73.75, 45.65], [-73.68, 45.68], [-73.53, 46.03], [-73.0, 46.25], [-72.75, 46.15], [-72.68, 46.18], [-72.53, 46.53], [-72.0, 46.75], [-71.75, 46.65], [-71.5, 46.75], [-70.97, 46.53], [-70.75, 46.0], [-70.97, 45.47], [-71.5, 45.25], [-71.75, 45.35], [-71.82, 45.32], [-71.97, 44.97], [-72.32, 44.82], [-72.47, 44.47], [-72.82, 44.32], [-72.85, 44.25], [-72.75, 44.0], [-72.97, 43.47], [-73.32, 43.32], [-73.35, 43.25], [-73.25, 43.0], [-73.47, 42.47], [-74.0, 42.25], [-74.25, 42.35]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["E.North-America"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-12-11T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-73.25, 43.0], [-73.47000000000003, 42.47], [-74.0, 42.25], [-74.25, 42.35], [-74.5, 42.25], [-75.02999999999997, 42.47], [-75.25, 43.0], [-75.02999999999997, 43.53], [-74.5, 43.75], [-74.25, 43.65], [-74.0, 43.75], [-73.47000000000003, 43.53], [-73.25, 43.0]]], [[[-77.64999999999998, 45.75], [-77.75, 46.0], [-77.52999999999997, 46.53], [-77.0, 46.75], [-76.75, 46.65], [-76.5, 46.75], [-75.97000000000003, 46.53], [-75.82, 46.18], [-75.47000000000003, 46.03], [-75.32, 45.68], [-75.25, 45.65], [-75.0, 45.75], [-74.75, 45.65], [-74.5, 45.75], [-74.25, 45.65], [-74.0, 45.75], [-73.75, 45.65], [-73.68, 45.68], [-73.52999999999997, 46.03], [-73.0, 46.25], [-72.75, 46.15], [-72.68, 46.18], [-72.52999999999997, 46.53], [-72.0, 46.75], [-71.75, 46.65], [-71.5, 46.75], [-70.97000000000003, 46.53], [-70.75, 46.0], [-70.97000000000003, 45.47], [-71.5, 45.25], [-71.75, 45.35], [-71.82, 45.32], [-71.97000000000003, 44.97], [-72.32, 44.82], [-72.47000000000003, 44.47], [-73.0, 44.25], [-73.25, 44.35], [-73.32, 44.32], [-73.47000000000003, 43.97], [-74.0, 43.75], [-74.52999999999997, 43.97], [-74.68, 44.32], [-74.75, 44.35], [-74.82, 44.32], [-74.97000000000003, 43.97], [-75.32, 43.82], [-75.47000000000003, 43.47], [-76.0, 43.25], [-76.52999999999997, 43.47], [-76.75, 44.0], [-76.64999999999998, 44.25], [-76.68, 44.32], [-76.75, 44.35], [-77.0, 44.25], [-77.52999999999997, 44.47], [-77.75, 45.0], [-77.64999999999998, 45.25], [-77.75, 45.5], [-77.64999999999998, 45.75]]]]}, "2021-12-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.75, 45.5], [-77.64999999999998, 45.75], [-77.75, 46.0], [-77.52999999999997, 46.53], [-77.0, 46.75], [-76.75, 46.65], [-76.5, 46.75], [-75.97000000000003, 46.53], [-75.82, 46.18], [-75.47000000000003, 46.03], [-75.32, 45.68], [-75.25, 45.65], [-75.0, 45.75], [-74.75, 45.65], [-74.5, 45.75], [-74.25, 45.65], [-74.0, 45.75], [-73.75, 45.65], [-73.68, 45.68], [-73.52999999999997, 46.03], [-73.0, 46.25], [-72.75, 46.15], [-72.68, 46.18], [-72.52999999999997, 46.53], [-72.0, 46.75], [-71.75, 46.65], [-71.5, 46.75], [-70.97000000000003, 46.53], [-70.75, 46.0], [-70.97000000000003, 45.47], [-71.5, 45.25], [-71.75, 45.35], [-71.82, 45.32], [-71.97000000000003, 44.97], [-72.32, 44.82], [-72.47000000000003, 44.47], [-72.82, 44.32], [-72.85000000000002, 44.25], [-72.75, 44.0], [-72.97000000000003, 43.47], [-73.32, 43.32], [-73.35000000000002, 43.25], [-73.25, 43.0], [-73.47000000000003, 42.47], [-74.0, 42.25], [-74.25, 42.35], [-74.5, 42.25], [-75.02999999999997, 42.47], [-75.25, 43.0], [-75.02999999999997, 43.53], [-74.68, 43.68], [-74.54000000000002, 44.0], [-74.68, 44.32], [-74.75, 44.35], [-74.82, 44.32], [-74.97000000000003, 43.97], [-75.32, 43.82], [-75.47000000000003, 43.47], [-76.0, 43.25], [-76.52999999999997, 43.47], [-76.75, 44.0], [-76.64999999999998, 44.25], [-76.68, 44.32], [-76.75, 44.35], [-77.0, 44.25], [-77.52999999999997, 44.47], [-77.75, 45.0], [-77.64999999999998, 45.25], [-77.75, 45.5]]]]}, "2021-12-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.75, 45.5], [-77.64999999999998, 45.75], [-77.75, 46.0], [-77.52999999999997, 46.53], [-77.0, 46.75], [-76.75, 46.65], [-76.5, 46.75], [-75.97000000000003, 46.53], [-75.82, 46.18], [-75.47000000000003, 46.03], [-75.32, 45.68], [-75.25, 45.65], [-75.0, 45.75], [-74.75, 45.65], [-74.5, 45.75], [-74.25, 45.65], [-74.0, 45.75], [-73.75, 45.65], [-73.68, 45.68], [-73.52999999999997, 46.03], [-73.0, 46.25], [-72.75, 46.15], [-72.68, 46.18], [-72.52999999999997, 46.53], [-72.0, 46.75], [-71.75, 46.65], [-71.5, 46.75], [-70.97000000000003, 46.53], [-70.75, 46.0], [-70.97000000000003, 45.47], [-71.5, 45.25], [-71.75, 45.35], [-71.82, 45.32], [-71.97000000000003, 44.97], [-72.32, 44.82], [-72.47000000000003, 44.47], [-72.82, 44.32], [-72.85000000000002, 44.25], [-72.75, 44.0], [-72.97000000000003, 43.47], [-73.32, 43.32], [-73.35000000000002, 43.25], [-73.25, 43.0], [-73.47000000000003, 42.47], [-74.0, 42.25], [-74.25, 42.35], [-74.5, 42.25], [-75.02999999999997, 42.47], [-75.25, 43.0], [-75.02999999999997, 43.53], [-74.68, 43.68], [-74.54000000000002, 44.0], [-74.68, 44.32], [-74.75, 44.35], [-74.82, 44.32], [-74.97000000000003, 43.97], [-75.32, 43.82], [-75.47000000000003, 43.47], [-76.0, 43.25], [-76.52999999999997, 43.47], [-76.75, 44.0], [-76.64999999999998, 44.25], [-76.68, 44.32], [-76.75, 44.35], [-77.0, 44.25], [-77.52999999999997, 44.47], [-77.75, 45.0], [-77.64999999999998, 45.25], [-77.75, 45.5]]]]}, "2021-12-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-74.75, 43.5], [-74.52999999999997, 44.03], [-74.18, 44.18], [-74.14999999999998, 44.25], [-74.25, 44.5], [-74.02999999999997, 45.03], [-73.5, 45.25], [-72.97000000000003, 45.03], [-72.75, 44.5], [-72.85000000000002, 44.25], [-72.75, 44.0], [-72.97000000000003, 43.47], [-73.32, 43.32], [-73.35000000000002, 43.25], [-73.25, 43.0], [-73.47000000000003, 42.47], [-74.0, 42.25], [-74.52999999999997, 42.47], [-74.75, 43.0], [-74.64999999999998, 43.25], [-74.75, 43.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": 10.996067542027959}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": 7.792531006770765}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [2.6915805206312484, 3.492878357402674, 4.896076820108533, 3.500103287908928]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [6.2575101362839405, 5.35312927273884, 6.595767337578593, 4.6018514592111615]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [7.009625079644418, 7.524724167202241, 8.975907455831068, 6.30987170545923]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [7.975892120850574, 8.938959085963916, 10.996067542027959, 6.838289422229252]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [1.2564073281552086, 1.2984335457149783, 1.5474953657744916, 1.1992441826851081]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [1.5546907107583388, 1.4766994823821473, 1.7618549603751699, 1.2568207361704224]}}