{"version_information": {"version": "det_AHW_v1.1", "compiled_date": "2026-04-05 16:23:46.527840", "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": "2022-Oct-31_to_2022-Nov-02_227.0_53.5"}, "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": 2022100001178}, "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": "October 31 2022"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "November 02 2022"}, "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": "Cold spell"}, "area": {"name": "Area", "description": "The area (in square meters) encompassing all grid points under the influence of an event during its lifetime.", "value": 147586.8465273842}, "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": ["Heck Seamount", "Pacific Ocean"]}, "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": 53.5}, "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": 227.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "227.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 227.0}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 232.0}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 47.5}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 54.0}, "polygons_merged": {"name": "Merged polygon", "description": "Merger or polygons at each time step", "value": {"type": "MultiPolygon", "coordinates": [[[[-133.18, 51.68], [-133.15, 51.75], [-133.18, 51.82], [-133.53, 51.97], [-133.75, 52.5], [-133.65, 52.75], [-133.75, 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[-132.65, 47.75], [-132.75, 48.0], [-132.65, 48.25], [-132.75, 48.5], [-132.65, 48.75], [-132.68, 48.82], [-133.03, 48.97], [-133.25, 49.5], [-133.15, 49.75], [-133.18, 49.82], [-133.53, 49.97], [-133.75, 50.5], [-133.65, 50.75], [-133.75, 51.0], [-133.53, 51.53], [-133.18, 51.68]]]]}}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.W.North-America", "W.North-America", "N.Pacific-Ocean"]}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2022-10-31T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-133.75, 51.0], [-133.53, 51.53], [-133.18, 51.68], [-133.15, 51.75], [-133.18, 51.82], [-133.53, 51.97], [-133.75, 52.5], [-133.65, 52.75], [-133.75, 53.0], [-133.65, 53.25], [-133.75, 53.5], [-133.65, 53.75], [-133.75, 54.0], [-133.53, 54.53], [-133.0, 54.75], [-132.75, 54.65], [-132.5, 54.75], [-132.25, 54.65], [-132.0, 54.75], 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[-133.53, 49.97], [-133.75, 50.5], [-133.65, 50.75], [-133.75, 51.0]]]]}, "2022-11-01T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-133.75, 51.0], [-133.53, 51.53], [-133.18, 51.68], [-133.15, 51.75], [-133.18, 51.82], [-133.53, 51.97], [-133.75, 52.5], [-133.65, 52.75], [-133.75, 53.0], [-133.65, 53.25], [-133.75, 53.5], [-133.65, 53.75], [-133.75, 54.0], [-133.53, 54.53], [-133.0, 54.75], [-132.75, 54.65], [-132.5, 54.75], [-132.25, 54.65], [-132.0, 54.75], [-131.47, 54.53], [-131.25, 54.0], [-131.35, 53.75], [-131.25, 53.5], [-131.35, 53.25], [-131.32, 53.18], [-130.97, 53.03], [-130.82, 52.68], [-130.47, 52.53], [-130.32, 52.18], [-129.97, 52.03], [-129.82, 51.68], [-129.47, 51.53], [-129.32, 51.18], [-128.97, 51.03], [-128.75, 50.5], [-128.85, 50.25], [-128.82, 50.18], [-128.75, 50.15], [-128.68, 50.18], [-128.53, 50.53], [-128.0, 50.75], [-127.47, 50.53], [-127.25, 50.0], [-127.35, 49.75], [-127.25, 49.5], [-127.47, 48.97], [-127.82, 48.82], [-127.97, 48.47], 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[-133.65, 50.75], [-133.75, 51.0]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -5.0818016240303905}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -3.1475727063825705}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [8.049292828073078, 6.206994305252692, 7.9942762665220926]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [3.56859130398351, 2.2248048675018595, 3.11447222320254]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-2.626182962091318, -4.363890689662218, -2.4526444673941743]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-4.115522561578871, -5.0818016240303905, -4.082557148231899]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.7969375117475284, -2.908656875709291, -1.5285334106089283]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.4060340050265303, -3.356905154266145, -1.798574994396934]}}