{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:46:46.828573", "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-Feb-21_to_2011-Feb-27_291.0_80.0"}, "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": 2011020001050}, "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": "February 21 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "February 27 2011"}, "duration": {"name": "Duration", "description": "Time elapsed (days) from the start date to the end date", "value": 7}, "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": 55556.37240578239}, "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", "Greenland"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["Greenland/Iceland", "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": ["Baffin Bay"]}, "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": 80.0}, "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": 291.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "291.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 280.75}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 295.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 76.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 81.25}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-02-21T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.03, 78.03], [-75.68, 78.18], [-75.65, 78.25], [-75.75, 78.5], [-75.53, 79.03], [-75.0, 79.25], [-74.75, 79.15], [-74.5, 79.25], [-73.97, 79.03], [-73.82, 78.68], [-73.47, 78.53], [-73.25, 78.0], [-73.35, 77.75], [-73.25, 77.5], [-73.47, 76.97], [-74.0, 76.75], [-74.25, 76.85], [-74.32, 76.82], [-74.47, 76.47], [-75.0, 76.25], [-75.53, 76.47], [-75.68, 76.82], [-76.03, 76.97], [-76.25, 77.5], [-76.03, 78.03]]], [[[-72.75, 79.5], [-72.53, 80.03], [-72.0, 80.25], [-71.75, 80.15], [-71.5, 80.25], [-71.25, 80.15], [-71.18, 80.18], [-71.03, 80.53], [-70.5, 80.75], [-70.25, 80.65], [-70.0, 80.75], [-69.75, 80.65], [-69.5, 80.75], [-69.25, 80.65], [-69.0, 80.75], [-68.75, 80.65], [-68.5, 80.75], [-68.25, 80.65], [-68.0, 80.75], [-67.47, 80.53], [-67.25, 80.0], [-67.47, 79.47], [-68.0, 79.25], [-68.25, 79.35], [-68.5, 79.25], [-68.75, 79.35], [-69.0, 79.25], [-69.25, 79.35], [-69.5, 79.25], [-69.75, 79.35], [-70.0, 79.25], [-70.25, 79.35], [-70.32, 79.32], [-70.47, 78.97], [-71.0, 78.75], [-71.25, 78.85], [-71.5, 78.75], [-71.75, 78.85], [-72.0, 78.75], [-72.53, 78.97], [-72.75, 79.5]]]]}, "2011-02-22T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-76.03, 78.03], [-75.68, 78.18], [-75.65, 78.25], [-75.75, 78.5], [-75.53, 79.03], [-75.0, 79.25], [-74.75, 79.15], [-74.5, 79.25], [-74.25, 79.15], [-74.0, 79.25], [-73.75, 79.15], [-73.5, 79.25], [-72.97, 79.03], [-72.75, 78.5], [-72.85, 78.25], [-72.75, 78.0], [-72.97, 77.47], [-73.32, 77.32], [-73.47, 76.97], [-74.0, 76.75], [-74.25, 76.85], [-74.32, 76.82], [-74.47, 76.47], [-75.0, 76.25], [-75.53, 76.47], [-75.68, 76.82], [-76.03, 76.97], [-76.25, 77.5], [-76.03, 78.03]]], [[[-72.75, 79.5], [-72.53, 80.03], [-72.0, 80.25], [-71.75, 80.15], [-71.5, 80.25], [-71.25, 80.15], [-71.18, 80.18], [-71.03, 80.53], [-70.5, 80.75], [-70.25, 80.65], [-70.0, 80.75], [-69.75, 80.65], [-69.5, 80.75], [-69.25, 80.65], [-69.0, 80.75], [-68.75, 80.65], [-68.5, 80.75], [-68.25, 80.65], [-68.0, 80.75], [-67.47, 80.53], [-67.25, 80.0], [-67.47, 79.47], [-68.0, 79.25], [-68.25, 79.35], [-68.5, 79.25], [-68.75, 79.35], [-69.0, 79.25], [-69.25, 79.35], [-69.5, 79.25], [-69.75, 79.35], [-70.0, 79.25], [-70.25, 79.35], [-70.32, 79.32], [-70.47, 78.97], [-71.0, 78.75], [-71.25, 78.85], [-71.5, 78.75], [-71.75, 78.85], [-72.0, 78.75], [-72.53, 78.97], [-72.75, 79.5]]]]}, "2011-02-23T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.53, 79.47], [-79.75, 80.0], [-79.53, 80.53], [-79.0, 80.75], [-78.75, 80.65], [-78.5, 80.75], [-78.25, 80.65], [-78.0, 80.75], [-77.75, 80.65], [-77.5, 80.75], [-77.25, 80.65], [-77.0, 80.75], [-76.75, 80.65], [-76.5, 80.75], [-76.25, 80.65], [-76.0, 80.75], [-75.47, 80.53], [-75.32, 80.18], [-74.97, 80.03], [-74.8, 79.63], [-74.5, 79.75], [-74.25, 79.65], [-74.0, 79.75], [-73.75, 79.65], [-73.68, 79.68], [-73.53, 80.03], [-73.0, 80.25], [-72.75, 80.15], [-72.68, 80.18], [-72.53, 80.53], [-72.0, 80.75], [-71.75, 80.65], [-71.5, 80.75], [-71.25, 80.65], [-71.0, 80.75], [-70.75, 80.65], [-70.5, 80.75], [-70.25, 80.65], [-70.0, 80.75], [-69.75, 80.65], [-69.68, 80.68], [-69.53, 81.03], [-69.0, 81.25], [-68.75, 81.15], [-68.5, 81.25], [-68.25, 81.15], [-68.18, 81.18], [-68.03, 81.53], [-67.5, 81.75], [-66.97, 81.53], [-66.82, 81.18], [-66.47, 81.03], [-66.32, 80.68], [-65.97, 80.53], [-65.75, 80.0], [-65.85, 79.75], [-65.75, 79.5], [-65.97, 78.97], [-66.5, 78.75], [-66.75, 78.85], [-67.0, 78.75], [-67.25, 78.85], [-67.5, 78.75], [-67.75, 78.85], [-68.0, 78.75], [-68.25, 78.85], [-68.5, 78.75], [-68.75, 78.85], [-69.0, 78.75], [-69.25, 78.85], [-69.5, 78.75], [-69.75, 78.85], [-69.82, 78.82], [-69.97, 78.47], [-70.5, 78.25], [-70.75, 78.35], [-71.0, 78.25], [-71.25, 78.35], [-71.32, 78.32], [-71.47, 77.97], [-72.0, 77.75], [-72.25, 77.85], [-72.5, 77.75], [-72.75, 77.85], [-72.82, 77.82], [-72.97, 77.47], [-73.32, 77.32], [-73.47, 76.97], [-74.0, 76.75], [-74.25, 76.85], [-74.32, 76.82], [-74.47, 76.47], [-75.0, 76.25], [-75.53, 76.47], [-75.68, 76.82], [-76.03, 76.97], [-76.18, 77.32], [-76.53, 77.47], [-76.75, 78.0], [-76.53, 78.53], [-76.0, 78.75], [-75.75, 78.65], [-75.68, 78.68], [-75.62, 78.8], [-76.03, 78.97], [-76.18, 79.32], [-76.25, 79.35], [-76.5, 79.25], [-76.75, 79.35], [-77.0, 79.25], [-77.25, 79.35], [-77.5, 79.25], [-77.75, 79.35], [-78.0, 79.25], [-78.25, 79.35], [-78.5, 79.25], [-78.75, 79.35], [-79.0, 79.25], [-79.53, 79.47]]]]}, "2011-02-24T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.53, 79.47], [-79.75, 80.0], [-79.53, 80.53], [-79.0, 80.75], [-78.75, 80.65], [-78.5, 80.75], [-78.25, 80.65], [-78.0, 80.75], [-77.75, 80.65], [-77.5, 80.75], [-77.25, 80.65], [-77.0, 80.75], [-76.75, 80.65], [-76.5, 80.75], [-76.25, 80.65], [-76.0, 80.75], [-75.47, 80.53], [-75.32, 80.18], [-75.25, 80.15], [-75.0, 80.25], [-74.75, 80.15], [-74.5, 80.25], [-74.25, 80.15], [-74.0, 80.25], [-73.75, 80.15], [-73.5, 80.25], [-73.25, 80.15], [-73.0, 80.25], [-72.75, 80.15], [-72.68, 80.18], [-72.53, 80.53], [-72.0, 80.75], [-71.75, 80.65], [-71.5, 80.75], [-71.25, 80.65], [-71.0, 80.75], [-70.75, 80.65], [-70.5, 80.75], [-70.25, 80.65], [-70.0, 80.75], [-69.75, 80.65], [-69.68, 80.68], [-69.53, 81.03], [-69.0, 81.25], [-68.75, 81.15], [-68.5, 81.25], [-68.25, 81.15], [-68.18, 81.18], [-68.03, 81.53], [-67.5, 81.75], [-66.97, 81.53], [-66.82, 81.18], [-66.47, 81.03], [-66.32, 80.68], [-66.25, 80.65], [-66.0, 80.75], [-65.47, 80.53], [-65.32, 80.18], [-65.25, 80.15], [-65.0, 80.25], [-64.47, 80.03], [-64.25, 79.5], [-64.47, 78.97], [-65.0, 78.75], [-65.25, 78.85], [-65.32, 78.82], [-65.47, 78.47], [-66.0, 78.25], [-66.25, 78.35], [-66.5, 78.25], [-66.75, 78.35], [-67.0, 78.25], [-67.25, 78.35], [-67.5, 78.25], [-67.75, 78.35], [-67.82, 78.32], [-67.97, 77.97], [-68.5, 77.75], [-68.75, 77.85], [-69.0, 77.75], [-69.25, 77.85], [-69.5, 77.75], [-69.75, 77.85], [-70.0, 77.75], [-70.25, 77.85], [-70.5, 77.75], [-70.75, 77.85], [-71.0, 77.75], [-71.25, 77.85], [-71.5, 77.75], [-71.75, 77.85], [-72.0, 77.75], [-72.25, 77.85], [-72.5, 77.75], [-72.75, 77.85], [-72.82, 77.82], [-72.97, 77.47], [-73.5, 77.25], [-73.75, 77.35], [-74.0, 77.25], [-74.25, 77.35], [-74.5, 77.25], [-74.75, 77.35], [-75.0, 77.25], [-75.25, 77.35], [-75.5, 77.25], [-75.75, 77.35], [-76.0, 77.25], [-76.25, 77.35], [-76.5, 77.25], [-77.03, 77.47], [-77.25, 78.0], [-77.03, 78.53], [-76.5, 78.75], [-76.75, 78.85], [-77.0, 78.75], [-77.53, 78.97], [-77.68, 79.32], [-77.75, 79.35], [-78.0, 79.25], [-78.25, 79.35], [-78.5, 79.25], [-78.75, 79.35], [-79.0, 79.25], [-79.53, 79.47]], [[-76.25, 78.65], [-76.0, 78.75], [-76.25, 78.85], [-76.5, 78.75], [-76.25, 78.65]], [[-75.75, 78.65], [-75.68, 78.68], [-75.65, 78.75], [-75.68, 78.82], [-75.75, 78.85], [-76.0, 78.75], [-75.75, 78.65]]]]}, "2011-02-25T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-79.53, 79.47], [-79.75, 80.0], [-79.53, 80.53], [-79.0, 80.75], [-78.75, 80.65], [-78.5, 80.75], [-78.25, 80.65], [-78.0, 80.75], [-77.75, 80.65], [-77.5, 80.75], [-77.25, 80.65], [-77.0, 80.75], [-76.75, 80.65], [-76.5, 80.75], [-76.25, 80.65], [-76.0, 80.75], [-75.47, 80.53], [-75.32, 80.18], [-75.25, 80.15], [-75.0, 80.25], [-74.75, 80.15], [-74.5, 80.25], [-74.25, 80.15], [-74.0, 80.25], [-73.75, 80.15], [-73.5, 80.25], [-73.25, 80.15], [-73.0, 80.25], [-72.75, 80.15], [-72.68, 80.18], [-72.53, 80.53], [-72.0, 80.75], [-71.75, 80.65], [-71.5, 80.75], [-71.25, 80.65], [-71.0, 80.75], [-70.75, 80.65], [-70.5, 80.75], [-70.25, 80.65], [-70.0, 80.75], [-69.75, 80.65], [-69.68, 80.68], [-69.53, 81.03], [-69.0, 81.25], [-68.75, 81.15], [-68.5, 81.25], [-68.25, 81.15], [-68.18, 81.18], [-68.03, 81.53], [-67.5, 81.75], [-66.97, 81.53], [-66.82, 81.18], [-66.47, 81.03], [-66.32, 80.68], [-66.25, 80.65], [-66.0, 80.75], [-65.47, 80.53], [-65.32, 80.18], [-65.25, 80.15], [-65.0, 80.25], [-64.47, 80.03], [-64.25, 79.5], [-64.47, 78.97], [-65.0, 78.75], [-65.25, 78.85], [-65.32, 78.82], [-65.47, 78.47], [-66.0, 78.25], [-66.25, 78.35], [-66.5, 78.25], [-66.75, 78.35], [-67.0, 78.25], [-67.25, 78.35], [-67.5, 78.25], [-67.75, 78.35], [-67.82, 78.32], [-67.97, 77.97], [-68.5, 77.75], [-68.75, 77.85], [-69.0, 77.75], [-69.25, 77.85], [-69.5, 77.75], [-69.75, 77.85], [-70.0, 77.75], [-70.25, 77.85], [-70.5, 77.75], [-70.75, 77.85], [-71.0, 77.75], [-71.25, 77.85], [-71.5, 77.75], [-71.75, 77.85], [-72.0, 77.75], [-72.25, 77.85], [-72.5, 77.75], [-72.75, 77.85], [-73.0, 77.75], [-73.25, 77.85], [-73.5, 77.75], [-73.75, 77.85], [-74.0, 77.75], [-74.25, 77.85], [-74.5, 77.75], [-74.75, 77.85], [-74.82, 77.82], [-74.97, 77.47], [-75.5, 77.25], [-75.75, 77.35], [-76.0, 77.25], [-76.25, 77.35], [-76.5, 77.25], [-77.03, 77.47], [-77.25, 78.0], [-77.03, 78.53], [-76.5, 78.75], [-76.75, 78.85], [-77.0, 78.75], [-77.53, 78.97], [-77.68, 79.32], [-77.75, 79.35], [-78.0, 79.25], [-78.25, 79.35], [-78.5, 79.25], [-78.75, 79.35], [-79.0, 79.25], [-79.53, 79.47]], [[-76.25, 78.65], [-76.0, 78.75], [-76.25, 78.85], [-76.5, 78.75], [-76.25, 78.65]], [[-75.75, 78.65], [-75.68, 78.68], [-75.65, 78.75], [-75.68, 78.82], [-75.75, 78.85], [-76.0, 78.75], [-75.75, 78.65]]]]}, "2011-02-26T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.53, 78.97], [-77.75, 79.5], [-77.53, 80.03], [-77.0, 80.25], [-76.75, 80.15], [-76.5, 80.25], [-76.25, 80.15], [-76.0, 80.25], [-75.75, 80.15], [-75.5, 80.25], [-75.25, 80.15], [-75.0, 80.25], [-74.75, 80.15], [-74.5, 80.25], [-74.25, 80.15], [-74.0, 80.25], [-73.75, 80.15], [-73.5, 80.25], [-73.25, 80.15], [-73.0, 80.25], [-72.75, 80.15], [-72.68, 80.18], [-72.53, 80.53], [-72.0, 80.75], [-71.75, 80.65], [-71.5, 80.75], [-71.25, 80.65], [-71.0, 80.75], [-70.75, 80.65], [-70.5, 80.75], [-70.25, 80.65], [-70.0, 80.75], [-69.75, 80.65], [-69.68, 80.68], [-69.53, 81.03], [-69.0, 81.25], [-68.75, 81.15], [-68.5, 81.25], [-68.25, 81.15], [-68.0, 81.25], [-67.75, 81.15], [-67.5, 81.25], [-67.25, 81.15], [-67.0, 81.25], [-66.47, 81.03], [-66.32, 80.68], [-66.25, 80.65], [-66.0, 80.75], [-65.47, 80.53], [-65.32, 80.18], [-65.25, 80.15], [-65.0, 80.25], [-64.47, 80.03], [-64.25, 79.5], [-64.47, 78.97], [-65.0, 78.75], [-65.25, 78.85], [-65.32, 78.82], [-65.47, 78.47], [-66.0, 78.25], [-66.25, 78.35], [-66.5, 78.25], [-66.75, 78.35], [-67.0, 78.25], [-67.25, 78.35], [-67.5, 78.25], [-67.75, 78.35], [-67.82, 78.32], [-67.97, 77.97], [-68.5, 77.75], [-68.75, 77.85], [-69.0, 77.75], [-69.25, 77.85], [-69.5, 77.75], [-69.75, 77.85], [-70.0, 77.75], [-70.25, 77.85], [-70.5, 77.75], [-70.75, 77.85], [-71.0, 77.75], [-71.25, 77.85], [-71.5, 77.75], [-72.0, 77.96], [-72.5, 77.75], [-72.75, 77.85], [-73.0, 77.75], [-73.25, 77.85], [-73.5, 77.75], [-73.75, 77.85], [-74.0, 77.75], [-74.25, 77.85], [-74.5, 77.75], [-74.75, 77.85], [-75.0, 77.75], [-75.3, 77.88], [-75.47, 77.47], [-76.0, 77.25], [-76.25, 77.35], [-76.5, 77.25], [-77.03, 77.47], [-77.25, 78.0], [-77.03, 78.53], [-76.5, 78.75], [-76.75, 78.85], [-77.0, 78.75], [-77.53, 78.97]], [[-76.25, 78.65], [-76.0, 78.75], [-76.25, 78.85], [-76.5, 78.75], [-76.25, 78.65]], [[-75.7, 78.63], [-75.65, 78.75], [-75.68, 78.82], [-75.75, 78.85], [-76.0, 78.75], [-75.7, 78.63]]]]}, "2011-02-27T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.5, 80.25], [-72.25, 80.15], [-72.0, 80.25], [-71.75, 80.15], [-71.5, 80.25], [-71.25, 80.15], [-71.0, 80.25], [-70.75, 80.15], [-70.5, 80.25], [-70.25, 80.15], [-70.0, 80.25], [-69.7, 80.13], [-69.53, 80.53], [-69.0, 80.75], [-68.75, 80.65], [-68.5, 80.75], [-67.97, 80.53], [-67.75, 80.0], [-67.97, 79.47], [-68.5, 79.25], [-68.75, 79.35], [-69.0, 79.25], [-69.3, 79.38], [-69.47, 78.97], [-70.0, 78.75], [-70.25, 78.85], [-70.5, 78.75], [-70.75, 78.85], [-71.0, 78.75], [-71.25, 78.85], [-71.32, 78.82], [-71.47, 78.47], [-72.0, 78.25], [-72.25, 78.35], [-72.5, 78.25], [-72.75, 78.35], [-73.0, 78.25], [-73.53, 78.47], [-73.75, 79.0], [-73.53, 79.53], [-73.18, 79.68], [-73.03, 80.03], [-72.5, 80.25]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -12.762750944363432}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -8.402750245240869}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [-26.815632952723092, -27.018348187513226, -31.835909346246837, -34.854286910430005, -36.35495682477702, -35.847198813023084, -30.25227742922496]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [-31.179413375399236, -30.42206291240757, -41.55675659998121, -44.15959500724685, -43.356832184249555, -42.50364014081552, -31.306594045027623]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.73522794134715, -6.001448835298811, -7.424335251182688, -8.529107504551117, -9.439491295682553, -9.449054623254991, -7.11425254595022]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-7.417563263364428, -7.642122294827232, -9.670517645140023, -11.775609721225464, -12.762750944363432, -12.565770478815807, -8.1223872554242]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.377940234068397, -1.3880262797227128, -1.4846728061430003, -1.5845134237320737, -1.7315149165918537, -1.7585011064308327, -1.4050293380267147]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.608039973307371, -1.5264745134889077, -1.7174174731042995, -1.9026930273115725, -2.0409794786246143, -2.3684807703267503, -1.5378637874235281]}}