{"version_information": {"version": "det_AHW_tail10.0_v1.1", "compiled_date": "2026-07-16 08:47:40.679495", "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-Jun-12_to_2011-Jun-14_289.5_44.0"}, "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": 2011060000657}, "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": "June 12 2011"}, "end_date": {"name": "End date", "description": "Last date on which grid points are under the influence of an event", "value": "June 14 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": 62156.73099880667}, "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": ["United States"]}, "IPCC_regions": {"name": "IPCC regions", "description": "List of all IPCC regions affected", "value": ["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": 44.0}, "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": 289.5}, "center_latf": {"name": "Center latitude", "description": "Formatted version of center longitude", "value": "289.5\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": 292.75}, "southern_lat": {"name": "Southernmost latitude", "description": "Southernmost latitude affected by event", "value": 41.75}, "northern_lat": {"name": "Northernmost latitude", "description": "Northernmost latitude affected by event", "value": 45.75}, "polygons": {"name": "Polygons", "description": "Polygon vertices describing the boundary of the event at each time step", "value": {"2011-06-12T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.75, 43.5], [-72.53, 44.03], [-72.18, 44.18], [-72.03, 44.53], [-71.68, 44.68], [-71.53, 45.03], [-71.0, 45.25], [-70.75, 45.15], [-70.68, 45.18], [-70.53, 45.53], [-70.0, 45.75], [-69.75, 45.65], [-69.5, 45.75], [-69.25, 45.65], [-69.18, 45.68], [-69.03, 46.03], [-68.5, 46.25], [-68.25, 46.15], [-68.0, 46.25], [-67.47, 46.03], [-67.32, 45.68], [-66.97, 45.53], [-66.75, 45.0], [-66.97, 44.47], [-67.5, 44.25], [-67.75, 44.35], [-67.82, 44.32], [-67.97, 43.97], [-68.5, 43.75], [-68.75, 43.85], [-68.82, 43.82], [-68.97, 43.47], [-69.5, 43.25], [-69.75, 43.35], [-69.82, 43.32], [-69.97, 42.97], [-70.32, 42.82], [-70.35, 42.75], [-70.25, 42.5], [-70.35, 42.25], [-70.25, 42.0], [-70.47, 41.47], [-71.0, 41.25], [-71.25, 41.35], [-71.5, 41.25], [-72.03, 41.47], [-72.25, 42.0], [-72.04, 42.5], [-72.18, 42.82], [-72.53, 42.97], [-72.75, 43.5]]]]}, "2011-06-13T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.75, 43.5], [-72.53, 44.03], [-72.18, 44.18], [-72.03, 44.53], [-71.68, 44.68], [-71.53, 45.03], [-71.0, 45.25], [-70.75, 45.15], [-70.68, 45.18], [-70.53, 45.53], [-70.0, 45.75], [-69.75, 45.65], [-69.5, 45.75], [-69.25, 45.65], [-69.18, 45.68], [-69.03, 46.03], [-68.5, 46.25], [-68.25, 46.15], [-68.0, 46.25], [-67.47, 46.03], [-67.32, 45.68], [-66.97, 45.53], [-66.75, 45.0], [-66.97, 44.47], [-67.5, 44.25], [-67.75, 44.35], [-67.82, 44.32], [-67.97, 43.97], [-68.5, 43.75], [-68.75, 43.85], [-68.82, 43.82], [-68.97, 43.47], [-69.5, 43.25], [-69.75, 43.35], [-69.82, 43.32], [-69.97, 42.97], [-70.32, 42.82], [-70.35, 42.75], [-70.25, 42.5], [-70.35, 42.25], [-70.25, 42.0], [-70.47, 41.47], [-71.0, 41.25], [-71.25, 41.35], [-71.5, 41.25], [-72.03, 41.47], [-72.25, 42.0], [-72.04, 42.5], [-72.18, 42.82], [-72.53, 42.97], [-72.75, 43.5]]]]}, "2011-06-14T11:30:00.000000000": {"type": "MultiPolygon", "coordinates": [[[[-72.75, 43.5], [-72.53, 44.03], [-72.18, 44.18], [-72.03, 44.53], [-71.68, 44.68], [-71.53, 45.03], [-71.0, 45.25], [-70.75, 45.15], [-70.68, 45.18], [-70.53, 45.53], [-70.0, 45.75], [-69.75, 45.65], [-69.5, 45.75], [-69.25, 45.65], [-69.18, 45.68], [-69.03, 46.03], [-68.5, 46.25], [-68.25, 46.15], [-68.0, 46.25], [-67.47, 46.03], [-67.32, 45.68], [-66.97, 45.53], [-66.75, 45.0], [-66.97, 44.47], [-67.5, 44.25], [-67.75, 44.35], [-67.82, 44.32], [-67.97, 43.97], [-68.5, 43.75], [-68.75, 43.85], [-68.82, 43.82], [-68.97, 43.47], [-69.5, 43.25], [-69.75, 43.35], [-69.82, 43.32], [-69.97, 42.97], [-70.32, 42.82], [-70.35, 42.75], [-70.25, 42.5], [-70.35, 42.25], [-70.25, 42.0], [-70.47, 41.47], [-71.0, 41.25], [-71.25, 41.35], [-71.5, 41.25], [-72.03, 41.47], [-72.25, 42.0], [-72.04, 42.5], [-72.18, 42.82], [-72.53, 42.97], [-72.75, 43.5]]]]}}}, "max_amp": {"name": "Maximum anomaly amplitude", "description": "Maximum t2m anomaly recorded over entire duration", "value": -6.881297357989126}, "mean_amp": {"name": "Mean anomaly amplitude", "description": "Mean t2m anomaly over entire duration", "value": -4.790791968570107}, "evo_areamean": {"name": "Evolution of mean t2m", "description": "The daily evolution of mean t2m.", "value": [11.545753175622679, 12.253479041275114, 12.764559722545869]}, "evo_maxamp": {"name": "Evolution of maximum t2m", "description": "The daily evolution of maximum t2m.", "value": [9.1948091664446, 9.897984436241472, 11.268218769285852]}, "anom_evo_areamean": {"name": "Evolution of mean t2m anomalies", "description": "The daily evolution of mean t2m anomalies.", "value": [-5.422480596917036, -4.73290089541389, -4.216994413379396]}, "anom_evo_maxamp": {"name": "Evolution of maximum t2m anomalies", "description": "The daily evolution of maximum t2m anomalies.", "value": [-6.881297357989126, -5.691062600510747, -5.002417817311539]}, "anom_scaled_evo_areamean": {"name": "Evolution of mean standardized t2m anomalies", "description": "The daily evolution of mean standardized t2m anomalies.", "value": [-1.6756760661880805, -1.438477909616374, -1.310292076392788]}, "anom_scaled_evo_maxamp": {"name": "Evolution of maximum standardized t2m anomalies", "description": "The daily evolution of maximum standardized t2m anomalies.", "value": [-1.9248675348521238, -1.6088210509837062, -1.4834623405054663]}}