{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:12.914037", "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-Apr-26_to_2011-Apr-28_297.0_58.5"}, "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": 2011040001364}, "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": "April 26 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "April 28 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": 148729.03060718952}, "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": ["Davis Strait", "Hudson Strait", "Labrador Sea"]}, "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": 58.5}, "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": 297.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "297.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 287.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 298.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 56.25}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 60.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-04-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.53, 60.03], [-72.0, 60.25], [-71.75, 60.15], [-71.5, 60.25], [-71.25, 60.15], [-71.18, 60.18], [-71.03, 60.53], [-70.68, 60.68], [-70.53, 61.03], [-70.0, 61.25], [-69.47, 61.03], [-69.25, 60.5], [-69.35, 60.25], [-69.25, 60.0], [-69.35, 59.75], [-69.32, 59.68], [-69.25, 59.65], [-69.0, 59.75], [-68.47, 59.53], [-68.32, 59.18], [-68.25, 59.15], [-68.0, 59.25], [-67.75, 59.15], [-67.68, 59.18], [-67.53, 59.53], [-67.18, 59.68], [-67.03, 60.03], [-66.68, 60.18], [-66.53, 60.53], [-66.0, 60.75], [-65.75, 60.65], [-65.5, 60.75], [-65.25, 60.65], [-65.0, 60.75], [-64.75, 60.65], [-64.5, 60.75], [-63.97, 60.53], [-63.82, 60.18], [-63.75, 60.15], [-63.5, 60.25], [-62.97, 60.03], [-62.82, 59.68], [-62.75, 59.65], [-62.5, 59.75], [-62.25, 59.65], [-62.0, 59.75], [-61.75, 59.65], [-61.5, 59.75], [-60.97, 59.53], [-60.75, 59.0], [-60.85, 58.75], [-60.75, 58.5], [-60.85, 58.25], [-60.75, 58.0], [-60.85, 57.75], [-60.75, 57.5], [-60.85, 57.25], [-60.75, 57.0], [-60.85, 56.75], [-60.75, 56.5], [-60.97, 55.97], [-61.5, 55.75], [-61.75, 55.85], [-62.0, 55.75], [-62.53, 55.97], [-62.68, 56.32], [-62.75, 56.35], [-62.82, 56.32], [-62.97, 55.97], [-63.5, 55.75], [-63.75, 55.85], [-64.0, 55.75], [-64.53, 55.97], [-64.68, 56.32], [-65.03, 56.47], [-65.25, 57.0], [-65.15, 57.25], [-65.18, 57.32], [-65.25, 57.35], [-65.32, 57.32], [-65.47, 56.97], [-66.0, 56.75], [-66.25, 56.85], [-66.5, 56.75], [-66.75, 56.85], [-67.0, 56.75], [-67.53, 56.97], [-67.68, 57.32], [-67.75, 57.35], [-68.0, 57.25], [-68.53, 57.47], [-68.68, 57.82], [-68.75, 57.85], [-69.0, 57.75], [-69.25, 57.85], [-69.5, 57.75], [-69.75, 57.85], [-69.82, 57.82], [-69.97, 57.47], [-70.5, 57.25], [-71.03, 57.47], [-71.25, 58.0], [-71.12, 58.3], [-71.25, 58.35], [-71.5, 58.25], [-71.75, 58.35], [-72.0, 58.25], [-72.53, 58.47], [-72.75, 59.0], [-72.65, 59.25], [-72.75, 59.5], [-72.53, 60.03]]]]}, "2011-04-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.53, 60.03], [-72.0, 60.25], [-71.75, 60.15], [-71.5, 60.25], [-71.25, 60.15], [-71.18, 60.18], [-71.03, 60.53], [-70.68, 60.68], [-70.53, 61.03], [-70.0, 61.25], [-69.47, 61.03], [-69.25, 60.5], [-69.35, 60.25], [-69.25, 60.0], [-69.35, 59.75], [-69.32, 59.68], [-69.25, 59.65], [-69.0, 59.75], [-68.47, 59.53], [-68.32, 59.18], [-68.25, 59.15], [-68.0, 59.25], [-67.75, 59.15], [-67.68, 59.18], [-67.53, 59.53], [-67.18, 59.68], [-67.03, 60.03], [-66.68, 60.18], [-66.53, 60.53], [-66.0, 60.75], [-65.75, 60.65], [-65.5, 60.75], [-65.25, 60.65], [-65.0, 60.75], [-64.75, 60.65], [-64.5, 60.75], [-63.97, 60.53], [-63.82, 60.18], [-63.75, 60.15], [-63.5, 60.25], [-62.97, 60.03], [-62.82, 59.68], [-62.75, 59.65], [-62.5, 59.75], [-62.25, 59.65], [-62.0, 59.75], [-61.75, 59.65], [-61.5, 59.75], [-60.97, 59.53], [-60.75, 59.0], [-60.85, 58.75], [-60.75, 58.5], [-60.85, 58.25], [-60.75, 58.0], [-60.85, 57.75], [-60.75, 57.5], [-60.85, 57.25], [-60.75, 57.0], [-60.85, 56.75], [-60.75, 56.5], [-60.97, 55.97], [-61.5, 55.75], [-61.75, 55.85], [-62.0, 55.75], [-62.53, 55.97], [-62.68, 56.32], [-62.75, 56.35], [-62.82, 56.32], [-62.97, 55.97], [-63.5, 55.75], [-63.75, 55.85], [-64.0, 55.75], [-64.53, 55.97], [-64.68, 56.32], [-65.03, 56.47], [-65.25, 57.0], [-65.15, 57.25], [-65.18, 57.32], [-65.25, 57.35], [-65.32, 57.32], [-65.47, 56.97], [-66.0, 56.75], [-66.25, 56.85], [-66.5, 56.75], [-66.75, 56.85], [-67.0, 56.75], [-67.53, 56.97], [-67.68, 57.32], [-67.75, 57.35], [-68.0, 57.25], [-68.53, 57.47], [-68.68, 57.82], [-68.75, 57.85], [-69.0, 57.75], [-69.25, 57.85], [-69.5, 57.75], [-69.75, 57.85], [-69.82, 57.82], [-69.97, 57.47], [-70.5, 57.25], [-71.03, 57.47], [-71.25, 58.0], [-71.12, 58.3], [-71.25, 58.35], [-71.5, 58.25], [-71.75, 58.35], [-72.0, 58.25], [-72.53, 58.47], [-72.75, 59.0], [-72.65, 59.25], [-72.75, 59.5], [-72.53, 60.03]]]]}, "2011-04-28T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.53, 60.03], [-72.0, 60.25], [-71.75, 60.15], [-71.5, 60.25], [-71.25, 60.15], [-71.18, 60.18], [-71.03, 60.53], [-70.68, 60.68], [-70.53, 61.03], [-70.0, 61.25], [-69.47, 61.03], [-69.25, 60.5], [-69.35, 60.25], [-69.25, 60.0], [-69.35, 59.75], [-69.32, 59.68], [-69.25, 59.65], [-69.0, 59.75], [-68.47, 59.53], [-68.32, 59.18], [-68.25, 59.15], [-68.0, 59.25], [-67.75, 59.15], [-67.68, 59.18], [-67.53, 59.53], [-67.18, 59.68], [-67.03, 60.03], [-66.68, 60.18], [-66.53, 60.53], [-66.0, 60.75], [-65.75, 60.65], [-65.5, 60.75], [-65.25, 60.65], [-65.0, 60.75], [-64.75, 60.65], [-64.5, 60.75], [-63.97, 60.53], [-63.82, 60.18], [-63.75, 60.15], [-63.5, 60.25], [-62.97, 60.03], [-62.82, 59.68], [-62.75, 59.65], [-62.5, 59.75], [-62.25, 59.65], [-62.0, 59.75], [-61.75, 59.65], [-61.5, 59.75], [-60.97, 59.53], [-60.75, 59.0], [-60.85, 58.75], [-60.75, 58.5], [-60.85, 58.25], [-60.75, 58.0], [-60.85, 57.75], [-60.75, 57.5], [-60.85, 57.25], [-60.75, 57.0], [-60.85, 56.75], [-60.75, 56.5], [-60.97, 55.97], [-61.5, 55.75], [-61.75, 55.85], [-62.0, 55.75], [-62.53, 55.97], [-62.68, 56.32], [-62.75, 56.35], [-62.82, 56.32], [-62.97, 55.97], [-63.5, 55.75], [-63.75, 55.85], [-64.0, 55.75], [-64.53, 55.97], [-64.68, 56.32], [-65.03, 56.47], [-65.25, 57.0], [-65.15, 57.25], [-65.18, 57.32], [-65.25, 57.35], [-65.32, 57.32], [-65.47, 56.97], [-66.0, 56.75], [-66.25, 56.85], [-66.5, 56.75], [-66.75, 56.85], [-67.0, 56.75], [-67.53, 56.97], [-67.68, 57.32], [-67.75, 57.35], [-68.0, 57.25], [-68.53, 57.47], [-68.68, 57.82], [-68.75, 57.85], [-69.0, 57.75], [-69.25, 57.85], [-69.5, 57.75], [-69.75, 57.85], [-69.82, 57.82], [-69.97, 57.47], [-70.5, 57.25], [-71.03, 57.47], [-71.25, 58.0], [-71.12, 58.3], [-71.25, 58.35], [-71.5, 58.25], [-71.75, 58.35], [-72.0, 58.25], [-72.53, 58.47], [-72.75, 59.0], [-72.65, 59.25], [-72.75, 59.5], [-72.53, 60.03]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -11.992402327590042}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.824202724359623}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-15.23117402218287, -15.472690901756664, -12.219544459569875]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-20.268621059299335, -20.096066056142718, -17.213842835208396]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-9.305719968284773, -10.012208927636214, -7.1546792771579]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-11.38706373069411, -11.992402327590042, -9.412735115089674]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.9495653532696062, -2.170087532177985, -1.5785018452120831]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-2.1837399392410726, -2.5075048854428417, -1.922202228455685]}}