{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:26.755291", "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": "2011-May-17_to_2011-May-19_285.5_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": 2011050000935}, "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 17 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "May 19 2011"}, "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": 55374.841627527116}, "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"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["N.E.North-America"]}, "continents_affected": {"name": "Continents affected", "description": "List of all continents affected", "value": ["North 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": ["Hudson Bay", "Hudson Strait"]}, "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": 285.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "285.5\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 280.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 290.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 59.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 62.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-05-17T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 60.47], [-80.25, 61.0], [-80.03, 61.53], [-79.5, 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60.25], [-74.75, 60.35], [-75.0, 60.25], [-75.25, 60.35], [-75.5, 60.25], [-75.75, 60.35], [-76.0, 60.25], [-76.25, 60.35], [-76.5, 60.25], [-76.75, 60.35], [-77.0, 60.25], [-77.25, 60.35], [-77.5, 60.25], [-77.75, 60.35], [-78.0, 60.25], [-78.25, 60.35], [-78.5, 60.25], [-78.75, 60.35], [-79.0, 60.25], [-79.25, 60.35], [-79.5, 60.25], [-80.03, 60.47]]]]}, "2011-05-18T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-80.03, 60.47], [-80.25, 61.0], [-80.03, 61.53], [-79.5, 61.75], [-79.25, 61.65], [-79.0, 61.75], [-78.75, 61.65], [-78.68, 61.68], [-78.53, 62.03], [-78.0, 62.25], [-77.75, 62.15], [-77.68, 62.18], [-77.53, 62.53], [-77.0, 62.75], [-76.75, 62.65], [-76.5, 62.75], [-75.97, 62.53], [-75.82, 62.18], [-75.75, 62.15], [-75.5, 62.25], [-75.25, 62.15], [-75.0, 62.25], [-74.75, 62.15], [-74.5, 62.25], [-74.25, 62.15], [-74.0, 62.25], [-73.75, 62.15], [-73.5, 62.25], [-72.97, 62.03], [-72.82, 61.68], [-72.75, 61.65], [-72.5, 61.75], [-72.25, 61.65], [-72.0, 61.75], 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60.35], [-75.0, 60.25], [-75.25, 60.35], [-75.5, 60.25], [-75.75, 60.35], [-76.0, 60.25], [-76.25, 60.35], [-76.5, 60.25], [-76.75, 60.35], [-77.0, 60.25], [-77.25, 60.35], [-77.5, 60.25], [-77.75, 60.35], [-78.0, 60.25], [-78.25, 60.35], [-78.5, 60.25], [-78.75, 60.35], [-79.0, 60.25], [-79.25, 60.35], [-79.5, 60.25], [-80.03, 60.47]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -7.927288133105549}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -5.929094089202118}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-8.72391851410481, -8.66889972646004, -8.25669226887851]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-10.702789371844005, -11.833302375595906, -10.111205414323479]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.941161298150483, -6.07046012125795, -5.775660848197906]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.812890357626998, -7.927288133105549, -6.942095733248891]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.603414539829683, -1.665113457037997, -1.5994132838801343]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.7031652000488489, -1.9485657797340437, -1.821060998588242]}}