{"version_information": {"version": "det_AHW_tail10.0_v1.2", "compiled_date": "2026-06-27 18:26:53.168722", "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-Aug-04_to_2021-Aug-07_284.0_58.0"}, "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": 2021080000302}, "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": "August 04 2021"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "August 07 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": "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": 155163.75091218518}, "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": []}, "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": 58.0}, "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": 284.0}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "284.0\u00b0E"}, "western_lon": {"name": "Westernmost longitude", "description": "Westernmost longitude affected by event", "value": 282.25}, "eastern_lon": {"name": "Easternmost longitude", "description": "Easternmost longitude affected by event", "value": 288.25}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 55.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 61.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2021-08-04T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-77.25, 58.0], [-77.03, 58.53], [-76.5, 58.75], [-76.25, 58.65], [-76.0, 58.75], [-75.47, 58.53], [-75.25, 58.0], [-75.35, 57.75], [-75.25, 57.5], [-75.47, 56.97], [-76.0, 56.75], [-76.53, 56.97], [-76.68, 57.32], [-77.03, 57.47], [-77.25, 58.0]]]]}, "2021-08-05T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-78.03, 59.53], [-77.68, 59.68], [-77.65, 59.75], [-77.75, 60.0], [-77.65, 60.25], [-77.75, 60.5], [-77.65, 60.75], [-77.75, 61.0], [-77.65, 61.25], [-77.75, 61.5], [-77.53, 62.03], [-77.0, 62.25], [-76.75, 62.15], [-76.5, 62.25], [-76.25, 62.15], [-76.0, 62.25], [-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], [-73.47, 62.03], [-73.32, 61.68], [-72.97, 61.53], [-72.82, 61.18], [-72.75, 61.15], [-72.5, 61.25], [-71.97, 61.03], [-71.82, 60.68], [-71.47, 60.53], [-71.25, 60.0], [-71.35, 59.75], [-71.25, 59.5], [-71.35, 59.25], [-71.25, 59.0], [-71.35, 58.75], [-71.25, 58.5], [-71.35, 58.25], [-71.25, 58.0], [-71.47, 57.47], [-72.0, 57.25], 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